Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 a409198128382ec0…

MALICIOUS

Office (OLE)

54.5 KB Created: 1999-01-07 03:46:00 Authoring application: Microsoft Word 8.0
MD5: a2f7943e0e09a99fc040f487fbf339da SHA-1: 0e27fcbfdeb10a97dcf71b479e862741a1724db1 SHA-256: a409198128382ec0429434928ef1ed732df05b332d62a0b81f465049c31918d5
240 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1059.001 PowerShell

The file is a Microsoft Word document containing VBA macros. The critical heuristic 'OLE_VBA_SHELL' indicates that the macros utilize the Shell() function, a common technique for executing arbitrary commands or downloading additional payloads. The presence of 'macros.bas' and ClamAV detections further support its malicious nature. The document body text appears to be unrelated academic material, suggesting it's a lure.

Heuristics 5

  • Shell() call in VBA critical OLE_VBA_SHELL
    Shell() call in VBA
  • ClamAV: Doc.Trojan.Marker-31 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-31
  • 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
8babaa823a891eed9dc86eb37b1af0ae6013da376c8555dbeb1ef3ef4f627f12		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 22628 bytes
Detection
ClamAV: Doc.Trojan.Marker-1
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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