Analysis Report e1df57de_by_Libranalysis

Overview

General Information

Sample Name: e1df57de_by_Libranalysis (renamed file extension from none to xls)
Analysis ID: 403717
MD5: e1df57deebdfeab450bf91049acff902
SHA1: 0037a523a17be3411b88072f7ceb3cc0ef384da7
SHA256: b0cccc9e79029c5b0b4e835e22e783a37ded6a300ca9d1738e554b126dd0969c
Tags: SilentBuilder
Infos:

Most interesting Screenshot:

Detection

Hidden Macro 4.0
Score: 76
Range: 0 - 100
Whitelisted: false
Confidence: 100%

Signatures

Multi AV Scanner detection for submitted file
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Document exploit detected (UrlDownloadToFile)
Document exploit detected (process start blacklist hit)
Found Excel 4.0 Macro with suspicious formulas
Sigma detected: Microsoft Office Product Spawning Windows Shell
Sigma detected: System File Execution Location Anomaly
Document contains embedded VBA macros
JA3 SSL client fingerprint seen in connection with other malware
Potential document exploit detected (performs DNS queries)
Potential document exploit detected (performs HTTP gets)
Potential document exploit detected (unknown TCP traffic)
Yara signature match

Classification

AV Detection:

barindex
Multi AV Scanner detection for submitted file
Source: e1df57de_by_Libranalysis.xls ReversingLabs: Detection: 10%
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: unknown HTTPS traffic detected: 170.249.236.47:443 -> 192.168.2.22:49165 version: TLS 1.2

Software Vulnerabilities:

barindex
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
Document exploit detected (process start blacklist hit)
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\rundll32.exe
Potential document exploit detected (performs DNS queries)
Source: global traffic DNS query: name: obsusa.net
Potential document exploit detected (performs HTTP gets)
Source: global traffic TCP traffic: 192.168.2.22:49165 -> 170.249.236.47:443
Potential document exploit detected (unknown TCP traffic)
Source: global traffic TCP traffic: 192.168.2.22:49165 -> 170.249.236.47:443

Networking:

barindex
JA3 SSL client fingerprint seen in connection with other malware
Source: Joe Sandbox View JA3 fingerprint: 7dcce5b76c8b17472d024758970a406b
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.MSO\975C826B.emf Jump to behavior
Source: rundll32.exe, 00000003.00000002.2116638550.0000000001B70000.00000002.00000001.sdmp String found in binary or memory: Please visit http://www.hotmail.com/oe to learn more. equals www.hotmail.com (Hotmail)
Source: unknown DNS traffic detected: queries for: obsusa.net
Source: 77EC63BDA74BD0D0E0426DC8F8008506.0.dr String found in binary or memory: http://ctldl.windowsupdate.com/msdownload/update/v3/static/trustedr/en/authrootstl.cab
Source: rundll32.exe, 00000003.00000002.2116638550.0000000001B70000.00000002.00000001.sdmp String found in binary or memory: http://investor.msn.com
Source: rundll32.exe, 00000003.00000002.2116638550.0000000001B70000.00000002.00000001.sdmp String found in binary or memory: http://investor.msn.com/
Source: rundll32.exe, 00000003.00000002.2117047835.0000000001D57000.00000002.00000001.sdmp String found in binary or memory: http://localizability/practices/XML.asp
Source: rundll32.exe, 00000003.00000002.2117047835.0000000001D57000.00000002.00000001.sdmp String found in binary or memory: http://localizability/practices/XMLConfiguration.asp
Source: rundll32.exe, 00000003.00000002.2117047835.0000000001D57000.00000002.00000001.sdmp String found in binary or memory: http://services.msn.com/svcs/oe/certpage.asp?name=%s&email=%s&&Check
Source: rundll32.exe, 00000003.00000002.2117047835.0000000001D57000.00000002.00000001.sdmp String found in binary or memory: http://windowsmedia.com/redir/services.asp?WMPFriendly=true
Source: rundll32.exe, 00000003.00000002.2116638550.0000000001B70000.00000002.00000001.sdmp String found in binary or memory: http://www.hotmail.com/oe
Source: rundll32.exe, 00000003.00000002.2117047835.0000000001D57000.00000002.00000001.sdmp String found in binary or memory: http://www.icra.org/vocabulary/.
Source: rundll32.exe, 00000003.00000002.2116638550.0000000001B70000.00000002.00000001.sdmp String found in binary or memory: http://www.msnbc.com/news/ticker.txt
Source: rundll32.exe, 00000003.00000002.2116638550.0000000001B70000.00000002.00000001.sdmp String found in binary or memory: http://www.windows.com/pctv.
Source: e1df57de_by_Libranalysis.xls String found in binary or memory: https://obsusa.net/chemgrcr.dll
Source: unknown Network traffic detected: HTTP traffic on port 49165 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 443 -> 49165
Source: unknown HTTPS traffic detected: 170.249.236.47:443 -> 192.168.2.22:49165 version: TLS 1.2

System Summary:

barindex
Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros)
Source: Screenshot number: 4 Screenshot OCR: Enable editing" to unlock the editina document downloaded from the Internet. 13 " ' 14 RunDLL |~|
Source: Screenshot number: 4 Screenshot OCR: Enable content" to perfor tart 18 the decryption of the document The specified module could not be
Source: Document image extraction number: 2 Screenshot OCR: Enable editing" to unlock the editing document downloaded from the internet. Protected View This fi
Source: Document image extraction number: 2 Screenshot OCR: Enable content" to perform Microsoft Office Decryption Core to start the decryption of the document
Source: Document image extraction number: 3 Screenshot OCR: Enable Content
Source: Document image extraction number: 4 Screenshot OCR: Enable Editing
Source: Document image extraction number: 13 Screenshot OCR: Enable editing" to unlock the editing document downloaded from the Internet. Protected View This fi
Source: Document image extraction number: 13 Screenshot OCR: Enable content" to perform Microsoft Office Decryption Core to start the decryption of the document
Found Excel 4.0 Macro with suspicious formulas
Source: e1df57de_by_Libranalysis.xls Initial sample: EXEC
Source: e1df57de_by_Libranalysis.xls Initial sample: CALL
Document contains embedded VBA macros
Source: e1df57de_by_Libranalysis.xls OLE indicator, VBA macros: true
Yara signature match
Source: e1df57de_by_Libranalysis.xls, type: SAMPLE Matched rule: SUSP_EnableContent_String_Gen date = 2019-02-12, hash1 = 525ba2c8d35f6972ac8fcec8081ae35f6fe8119500be20a4113900fe57d6a0de, author = Florian Roth, description = Detects suspicious string that asks to enable active content in Office Doc, reference = Internal Research
Source: rundll32.exe, 00000003.00000002.2116638550.0000000001B70000.00000002.00000001.sdmp Binary or memory string: .VBPud<_
Source: classification engine Classification label: mal76.expl.evad.winXLS@3/9@1/1
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\GDIPFONTCACHEV1.DAT Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File created: C:\Users\user\AppData\Local\Temp\CVRE4E2.tmp Jump to behavior
Source: e1df57de_by_Libranalysis.xls OLE indicator, Workbook stream: true
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE File read: C:\Users\desktop.ini Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Key opened: HKEY_CURRENT_USER\Software\Policies\Microsoft\SystemCertificates\CA Jump to behavior
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\rundll32.exe rundll32 ..\qqjdkdl.obp,StartW
Source: e1df57de_by_Libranalysis.xls ReversingLabs: Detection: 10%
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\rundll32.exe rundll32 ..\qqjdkdl.obp,StartW
Source: C:\Program Files\Microsoft Office\Office14\EXCEL.EXE Process created: C:\Windows\System32\rundll32.exe rundll32 ..\qqjdkdl.obp,StartW 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: 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\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\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\rundll32.exe Process information set: NOOPENFILEERRORBOX Jump to behavior
windows-stand
Hide Legend

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: 403717 Sample: e1df57de_by_Libranalysis Startdate: 04/05/2021 Architecture: WINDOWS Score: 76 14 Multi AV Scanner detection for submitted file 2->14 16 Office document tries to convince victim to disable security protection (e.g. to enable ActiveX or Macros) 2->16 18 Sigma detected: System File Execution Location Anomaly 2->18 20 3 other signatures 2->20 6 EXCEL.EXE 90 46 2->6         started        process3 dnsIp4 12 obsusa.net 170.249.236.47, 443, 49165 PRIVATESYSTEMSUS United States 6->12 22 Document exploit detected (UrlDownloadToFile) 6->22 10 rundll32.exe 6->10         started        signatures5 process6
  • 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
170.249.236.47
 obsusa.net United States
63410 PRIVATESYSTEMSUS false

Contacted Domains

Name IP Active
obsusa.net 170.249.236.47 true