Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 5549532b6477228d…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: a6b6bf72724e371e3d699d3fc764741c SHA-1: cc8851f3109f5f27ead4921e68f415b1c4c6b7d6 SHA-256: 5549532b6477228dbe008aefcd9cf36946dc27bec6e1dea0a5a33452ee60002c
160 Risk Score

Malware Insights

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

The sample is an Office document containing VBA macros. Heuristics indicate the VBA code references cmd.exe and PowerShell, suggesting it's designed to execute commands. The presence of a VBA project and the critical OLE_VBA_PS heuristic strongly suggest the macro attempts to download and run a secondary payload. The GetObject call further supports this by indicating potential object manipulation for execution.

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
c9b5cc817fb70100155d92ce580dbe71bd09fa1b22b626d7a9650e5bdfdabaf9		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
101ee69923963b2ed676320a68c43770e7d07ee9c7e3fd9c87b5cd9ea5026ea0		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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