Malicious Office (OOXML) — malware analysis report

Static analysis result for SHA-256 f7f47ed9644766cb…

MALICIOUS

Office (OOXML)

41.6 KB Created: 2021-06-22 12:43:05 UTC Authoring application: Microsoft Excel 16.0300
MD5: 6369caf199ea5c752e8575d22242c26d SHA-1: 449d3aaa043e9ecdbfbd8f36a2b758182abdc3eb SHA-256: f7f47ed9644766cb1a0f74016b97c998c45881b9c918df14b76f91fdba153018
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell T1059.003 Windows Command Shell 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 heavily obfuscated, but the presence of these indicators suggests it is designed 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
f7789a3f9767ccf15eaff2c4cfcd1655b75218c6226bd6183ce173f937618c7d		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 35036 bytes
vbaProject_00.bin
6cc34870dd9735787c8c6194f2738cd805fe525443270d9d8f11e84d3c43cfa6		 vba-project OOXML VBA project: xl/vbaProject.bin 11264 bytes

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