Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 55044f59da855dd6…

MALICIOUS

Office (OLE)

52.5 KB Created: 2005-04-08 16:09:00 Authoring application: Microsoft Word 9.0
MD5: 14546d9dc9fa34fb1641d031df3727c7 SHA-1: f6b117c30233370f71661f8ddf20fdf603f3e275 SHA-256: 55044f59da855dd64e9ee75cbeeced5662eff74a216e37e605bb875ed78225ac
240 Risk Score

Malware Insights

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

The sample is a Microsoft Word document containing VBA macros. Heuristics indicate the presence of VBA macros and a critical finding of the Shell() function being called within the VBA code. This suggests the document is designed to execute arbitrary commands. The embedded artifact 'macros.bas' is identified as a VBA macro, further supporting this. The document body, a Material Safety Data Sheet, appears to be a lure to disguise the malicious intent.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-1 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-1
  • 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.
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
cb4e40f0f7d6e81b7036ed4af8fe403e74ddcf7207d3e7bee85736df6c5aa44f
vba-macro oletools.olevba.extract_macros (decoded VBA source) 6312 bytes
Detection
ClamAV: Doc.Trojan.Marker-1
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.