Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 68b151374f2c850b…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 11870a026731d7e37a02f4abe025df45 SHA-1: efa33c4378a8aae2f8aec76c764fb4cf327809dc SHA-256: 68b151374f2c850bd0b3b2aca9df5e322d7267b5f52af1001f0170138a52ac60
160 Risk Score

Malware Insights

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

The file is an Office document containing VBA macros. Heuristics indicate the presence of PowerShell and cmd.exe references within the VBA code, suggesting an attempt to execute arbitrary commands. The VBA code also contains a GetObject call, which can be used to instantiate COM objects and execute code. The Decode64 function is present, indicating potential obfuscation of commands or URLs.

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
b1763d9bad8626e003431e05dc5bb19809f8558c1bbba57df2cab4cbf4f6b567		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
3e582d64b4143182e73d697e875afd9b5aa8691fe2b2d3ee609b86a4528dba17		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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