Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 7abf7d73373bcf1f…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 2421b9174cfc351da02a2ef24c1ac80d SHA-1: 70d215c08e4710550652420303fe771e90eacc18 SHA-256: 7abf7d73373bcf1f200ef256935ed8c733dab25d94d46151dda2ea2b94fd766a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell

The OOXML file contains VBA macros that reference cmd.exe and PowerShell. The GetObject call is also suspicious. These indicators suggest the VBA code is designed to execute obfuscated commands, likely to download and execute a secondary payload. The specific family is not identifiable from the provided evidence.

Heuristics 4

  • PowerShell reference in VBA critical OLE_VBA_PS
    PowerShell reference in VBA
  • GetObject call high OLE_VBA_GETOBJ
    GetObject call
  • cmd.exe reference in VBA high OLE_VBA_CMD
    cmd.exe reference in VBA
  • VBA project inside OOXML medium OOXML_VBA
    Document contains a VBA project — VBA macros present

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
c776b33eb99c6230f3cc5a105b3caa286f548f8ea5134d0277f6bf903b193fea		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
df76ea58b2fb93666b8b92efc145601d0766f97c6544572ae7faad448c353672		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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