Windows Analysis Report 942830.xlsb

Overview

General Information

Sample Name: 942830.xlsb
Analysis ID: 528106
MD5: 1d439288755abe01c8e0b84351a1adf3
SHA1: 3db8730627a0fc4faa83e348e7e25d9ab9b81cb7
SHA256: 72c5559bc575d4f5527babe24331374e5d319362e96e1078d35179aceea41941
Infos:

Most interesting Screenshot:

Detection

Hidden Macro 4.0 Dridex Downloader
Score: 100
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Yara detected Dridex Downloader
Multi AV Scanner detection for submitted file
Found malicious Excel 4.0 Macro
Creates and opens a fake document (probably a fake document to hide exploiting)
Found Excel 4.0 Macro with suspicious formulas
Sigma detected: Microsoft Office Product Spawning Windows Shell
Document exploit detected (process start blacklist hit)
Creates processes via WMI
Document exploit detected (UrlDownloadToFile)
Found protected and hidden Excel 4.0 Macro sheet
Contains functionality to create processes via WMI
Found obfuscated Excel 4.0 Macro
Queries the volume information (name, serial number etc) of a device
Found a hidden Excel 4.0 Macro sheet
Potential document exploit detected (unknown TCP traffic)
Searches for the Microsoft Outlook file path
May sleep (evasive loops) to hinder dynamic analysis
Yara detected Xls With Macro 4.0
Detected TCP or UDP traffic on non-standard ports
Sigma detected: Suspicious WMI Execution
Creates a window with clipboard capturing capabilities
IP address seen in connection with other malware

Classification

AV Detection:

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Multi AV Scanner detection for submitted file
Source: 942830.xlsb Virustotal: Detection: 8% Perma Link
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

Software Vulnerabilities:

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Document exploit detected (process start blacklist hit)
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\wbem\WMIC.exe
Document exploit detected (UrlDownloadToFile)
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Section loaded: \KnownDlls\api-ms-win-downlevel-shlwapi-l2-1-0.dll origin: URLDownloadToFileA Jump to behavior
Potential document exploit detected (unknown TCP traffic)
Source: global traffic TCP traffic: 192.168.2.22:49167 -> 136.144.181.174:8080

Networking:

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Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.22:49167 -> 136.144.181.174:8080
IP address seen in connection with other malware
Source: Joe Sandbox View IP Address: 136.144.181.174 136.144.181.174
Source: unknown TCP traffic detected without corresponding DNS query: 136.144.181.174
Source: unknown TCP traffic detected without corresponding DNS query: 136.144.181.174
Source: unknown TCP traffic detected without corresponding DNS query: 136.144.181.174
Source: unknown TCP traffic detected without corresponding DNS query: 136.144.181.174
Source: unknown TCP traffic detected without corresponding DNS query: 136.144.181.174
Source: unknown TCP traffic detected without corresponding DNS query: 136.144.181.174
Source: mshta.exe, 00000005.00000002.673902220.0000000003990000.00000002.00020000.sdmp String found in binary or memory: Please visit http://www.hotmail.com/oe to learn more. equals www.hotmail.com (Hotmail)
Source: mshta.exe, 00000005.00000002.673902220.0000000003990000.00000002.00020000.sdmp String found in binary or memory: http://investor.msn.com
Source: mshta.exe, 00000005.00000002.673902220.0000000003990000.00000002.00020000.sdmp String found in binary or memory: http://investor.msn.com/
Source: mshta.exe, 00000005.00000002.674064912.0000000003B77000.00000002.00020000.sdmp String found in binary or memory: http://localizability/practices/XML.asp
Source: mshta.exe, 00000005.00000002.674064912.0000000003B77000.00000002.00020000.sdmp String found in binary or memory: http://localizability/practices/XMLConfiguration.asp
Source: mshta.exe, 00000005.00000002.674257611.0000000003D70000.00000002.00020000.sdmp String found in binary or memory: http://schemas.xmlsoap.org/ws/2004/08/addressing/role/anonymous.
Source: WMIC.exe, 00000002.00000002.456772383.0000000001CA0000.00000002.00020000.sdmp String found in binary or memory: http://servername/isapibackend.dll
Source: mshta.exe, 00000005.00000002.674064912.0000000003B77000.00000002.00020000.sdmp String found in binary or memory: http://services.msn.com/svcs/oe/certpage.asp?name=%s&email=%s&&Check
Source: mshta.exe, 00000005.00000002.674064912.0000000003B77000.00000002.00020000.sdmp String found in binary or memory: http://windowsmedia.com/redir/services.asp?WMPFriendly=true
Source: mshta.exe, 00000005.00000002.674257611.0000000003D70000.00000002.00020000.sdmp String found in binary or memory: http://www.%s.comPA
Source: mshta.exe, 00000005.00000002.673902220.0000000003990000.00000002.00020000.sdmp String found in binary or memory: http://www.hotmail.com/oe
Source: mshta.exe, 00000005.00000002.674064912.0000000003B77000.00000002.00020000.sdmp String found in binary or memory: http://www.icra.org/vocabulary/.
Source: mshta.exe, 00000005.00000002.673902220.0000000003990000.00000002.00020000.sdmp String found in binary or memory: http://www.msnbc.com/news/ticker.txt
Source: mshta.exe, 00000005.00000002.673902220.0000000003990000.00000002.00020000.sdmp String found in binary or memory: http://www.windows.com/pctv.
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.MSO\DA1F7DD.png Jump to behavior

Key, Mouse, Clipboard, Microphone and Screen Capturing:

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Creates a window with clipboard capturing capabilities
Source: C:\Windows\System32\mshta.exe Window created: window name: CLIPBRDWNDCLASS Jump to behavior

E-Banking Fraud:

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Yara detected Dridex Downloader
Source: Yara match File source: C:\ProgramData\EvbrPIaoQqom.rtf, type: DROPPED

System Summary:

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Found malicious Excel 4.0 Macro
Source: 942830.xlsb Macro extractor: Sheet: Macro1 contains: mshta
Found Excel 4.0 Macro with suspicious formulas
Source: 942830.xlsb Initial sample: EXEC
Found protected and hidden Excel 4.0 Macro sheet
Source: 942830.xlsb Initial sample: Sheet name: Macro1
Contains functionality to create processes via WMI
Source: WMIC.exe, 00000002.00000002.456664618.0000000000380000.00000004.00000020.sdmp Binary or memory string: C:\Users\user\Documents\C:\Windows\System32\Wbem;;C:\Windows\system32;C:\Windows\system;C:\Windows;.;C:\ProgramData\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\C:\Windows\System32\Wbem\wmic.exewmic process call create "mshta C:\ProgramData\EvbrPIaoQqom.rtf"C:\Windows\System32\Wbem\wmic.exeWinSta0\Default<
Found obfuscated Excel 4.0 Macro
Source: 942830.xlsb Macro extractor: Sheet: Macro1 high usage of CHAR() function: 46
Found a hidden Excel 4.0 Macro sheet
Source: 942830.xlsb Macro extractor: Sheet name: Macro1
Searches for the Microsoft Outlook file path
Source: C:\Windows\System32\mshta.exe Key opened: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\App Paths\OUTLOOK.EXE Jump to behavior
Source: 942830.xlsb Virustotal: Detection: 8%
Source: C:\Windows\System32\wbem\WMIC.exe Key opened: HKEY_LOCAL_MACHINE\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: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\wbem\WMIC.exe wmic process call create "mshta C:\ProgramData\EvbrPIaoQqom.rtf"
Source: unknown Process created: C:\Windows\System32\mshta.exe mshta C:\ProgramData\EvbrPIaoQqom.rtf
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\wbem\WMIC.exe wmic process call create "mshta C:\ProgramData\EvbrPIaoQqom.rtf" Jump to behavior
Source: C:\Windows\System32\wbem\WMIC.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{4590F811-1D3A-11D0-891F-00AA004B2E24}\InprocServer32 Jump to behavior
Source: C:\Windows\System32\wbem\WMIC.exe WMI Queries: IWbemServices::ExecMethod - Win32_Process::Create
Source: mshta.exe, 00000005.00000002.673902220.0000000003990000.00000002.00020000.sdmp Binary or memory string: .VBPud<_
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\Desktop\~$942830.xlsb Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Temp\CVRDE3D.tmp Jump to behavior
Source: classification engine Classification label: mal100.troj.expl.evad.winXLSB@4/4@0/1
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File read: C:\Users\desktop.ini Jump to behavior
Source: C:\Windows\System32\mshta.exe Key opened: HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Settings Jump to behavior
Source: Window Recorder Window detected: More than 3 window changes detected
Source: 942830.xlsb Initial sample: OLE zip file path = xl/media/image2.png
Source: 942830.xlsb Initial sample: OLE zip file path = xl/media/image1.png
Source: 942830.xlsb Initial sample: OLE zip file path = docProps/custom.xml
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

Persistence and Installation Behavior:

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Creates processes via WMI
Source: C:\Windows\System32\wbem\WMIC.exe WMI Queries: IWbemServices::ExecMethod - Win32_Process::Create

Hooking and other Techniques for Hiding and Protection:

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Creates and opens a fake document (probably a fake document to hide exploiting)
Source: unknown Process created: cmd line: evbrpiaoqqom.rtf
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: cmd line: evbrpiaoqqom.rtf 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:\Windows\System32\wbem\WMIC.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\wbem\WMIC.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\mshta.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\mshta.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
Source: C:\Windows\System32\mshta.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:\Windows\System32\wbem\WMIC.exe TID: 1960 Thread sleep time: -120000s >= -30000s Jump to behavior
Source: C:\Windows\System32\wbem\WMIC.exe TID: 1960 Thread sleep time: -60000s >= -30000s Jump to behavior
Source: C:\Windows\System32\mshta.exe TID: 1664 Thread sleep time: -60000s >= -30000s Jump to behavior

HIPS / PFW / Operating System Protection Evasion:

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Yara detected Xls With Macro 4.0
Source: Yara match File source: app.xml, type: SAMPLE
Source: mshta.exe, 00000005.00000002.673597194.0000000001210000.00000002.00020000.sdmp Binary or memory string: Shell_TrayWnd
Source: mshta.exe, 00000005.00000002.673597194.0000000001210000.00000002.00020000.sdmp Binary or memory string: !Progman
Source: mshta.exe, 00000005.00000002.673597194.0000000001210000.00000002.00020000.sdmp Binary or memory string: Program Manager<

Language, Device and Operating System Detection:

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Queries the volume information (name, serial number etc) of a device
Source: C:\Windows\System32\mshta.exe Queries volume information: C:\Windows\Fonts\times.ttf VolumeInformation Jump to behavior
Source: C:\Windows\System32\mshta.exe Queries volume information: C:\Windows\Fonts\times.ttf VolumeInformation Jump to behavior
Source: C:\Windows\System32\wbem\WMIC.exe Key value queried: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Cryptography MachineGuid Jump to behavior