Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 986b86edc053aff6…

MALICIOUS

Office (OLE)

73.5 KB Created: 2008-10-27 19:22:00 Authoring application: Microsoft Word 11.0
MD5: eade0a83ab4066c2134cd1dacd6ccb71 SHA-1: a873cea4153dcd34632a682dfa4d5d1139c33861 SHA-256: 986b86edc053aff660d53ee5307ac690a13cf3e835223dd4169fd7d29ccb057e
240 Risk Score

Malware Insights

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

The file is an OLE document containing a VBA macro. Heuristics indicate the presence of a Shell() call within the VBA code, which is a critical indicator of malicious activity. The macro source file 'macros.bas' was extracted. The primary function of the script appears to be executing a shell command, suggesting it acts as a downloader for further malicious payloads. The document body content is unrelated to the malicious functionality.

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
b7a69af8f704fb01b758c8b908e8a775cff422417ebe9f1672418768ddeec511		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 6677 bytes
Detection
ClamAV: Doc.Trojan.Marker-3
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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