Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 c683d39631cee790…

MALICIOUS

Office (OLE)

126.0 KB Created: 2006-11-09 12:56:00 Authoring application: Microsoft Word 8.0
MD5: b207e0d92b93c2ad970eb22e72d59579 SHA-1: 4b6f386b47dbe10562215b2302460a1fc0f461b5 SHA-256: c683d39631cee7906344c5ee7ac9d19b739cc0ed0f3302ae7a0aee26da9e9884
240 Risk Score

Malware Insights

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

The file is a Microsoft Word document containing a malicious VBA macro. Heuristics indicate the presence of a Shell() call within the VBA code, suggesting an attempt to execute external commands or download additional payloads. ClamAV detections further confirm the malicious nature of the file and an extracted artifact named 'macros.bas'. The document body itself appears to be a legitimate business-related document, indicating a potential social engineering 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
48642f5386988fa2237ca3aa686bd53c68fd1aea4067ae421ca502f37d99595a		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 25750 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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