Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 8336ed2eb435da0c…

MALICIOUS

Office (OLE)

96.0 KB Created: 1996-12-17 01:32:42 Authoring application: Microsoft Excel
MD5: 74a576e29f1e71f46bbb5fe3880ee878 SHA-1: 13d80743cc64f0b9688a8bf5e017ec66095b8b42 SHA-256: 8336ed2eb435da0c66de77c7ff3189171fb361268827d3a350c4f6db77fe3fed
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The file is an Excel document containing VBA macros, specifically an Auto_Open macro. This macro is designed to copy itself to the Excel startup directory as 'StartUp.xls', thereby establishing persistence. The presence of the Auto_Open macro and the file copying behavior strongly suggest a malicious intent to maintain execution on the system.

Heuristics 4

  • ClamAV: Ppt.Malware.Laroux-10036124-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Ppt.Malware.Laroux-10036124-0
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Auto_Open macro high OLE_VBA_AUTO
    Auto_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
fb2929454da53a7c274256eb0b38ca9476f9f1c61d52f3b7e15bf6ac20b85c3e		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2073 bytes
Detection
ClamAV: Xls.Trojan.Escape-1
Obfuscation or payload: unlikely

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