Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 0659082099434b96…

MALICIOUS

Office (OOXML)

41.5 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: f941855fa53cf2e32fe28f38d437d7a6 SHA-1: e7ff525c66dcae4492012697a3f1f7ed0aac83b9 SHA-256: 0659082099434b96ce91a42b518c071bbf773e2c7ff8f9590febbbd942d3bcbd
160 Risk Score

Malware Insights

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

The file is an OOXML document containing VBA macros. Heuristics indicate the VBA code references PowerShell and cmd.exe, and uses GetObject. The VBA code itself appears to be obfuscated, but the presence of these indicators suggests it is designed to execute commands, likely to download and run a second-stage 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
3e8916d9a8d55b3dfdda79e4699f55e3caf9a81048b9de0e28773d9836719d14		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 34430 bytes
vbaProject_00.bin
cc6c249aa6fbecd38ac8b2af57346ff7225b0e890b8b175a3e638da4683022dc		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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