Malicious Office (OOXML) / .DOCM — malware analysis report

Static analysis result for SHA-256 f3d8916b99d7e630…

MALICIOUS

Office (OOXML) / .DOCM

124.0 KB Created: 2022-11-01 11:16:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2022-11-07
MD5: 74525ec764bce9ab029e6a73b9f3454b SHA-1: 4b42dae3afdf5c89cecbad77601e4ab8a99f2164 SHA-256: f3d8916b99d7e6301a885b2ec4aaf9635f1713464c53b1604d3b4e1abd673c36
442 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1059.005 Visual Basic T1204.002 Malicious File

The document contains a VBA macro that executes a PowerShell command upon opening. This command attempts to launch Google Chrome with a specific URL, 'https://mail.mfa.az-link.email/+CSCO+0075676763663A2F2F31302E3130302E3230302E32++/+CSCO+0075676763663A2F2F31302E3130302E3230302E32++/_task=login/', likely to trick the user into entering credentials on a fake login page. The use of WScript.Shell and PowerShell within the VBA macro strongly indicates malicious intent.

Heuristics 10

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • WScript.Shell usage critical OLE_VBA_WSCRIPT
    WScript.Shell usage
  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • ClamAV: Win.Downloader.Agent-9989399-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Downloader.Agent-9989399-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://mail.mfa.az-link.email/+CSCO+0075676763663A2F2F31302E3130302E3230302E32++/+CSCO+0075676763663A2F2F31302E3130302E3230302E32++/_task=login/
    • http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.microsoft.com/office/drawing/2015/10/21/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/9/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/10/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/11/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/12/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/13/chartex
    • http://schemas.microsoft.com/office/drawing/2016/5/14/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.microsoft.com/office/drawing/2016/ink
    • http://schemas.microsoft.com/office/drawing/2017/model3d
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2016/wordml/cid
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
fc2ebf3231997ed4d59dad85b3098f08819bcd23fc6b4573ff3108abf737d4db		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 807 bytes
vbaProject_00.bin
6d9461e582c64b87a87741bdb4e63f592a7c10410f3b5d343bfd520406df8ed0		 vba-project OOXML VBA project: word/vbaProject.bin 8192 bytes
Detection
ClamAV: Win.Downloader.Agent-9989399-0
Obfuscation or payload: unlikely

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