Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 747b627094b7f9c0…

MALICIOUS

Office (OLE)

50.5 KB Created: 2008-08-12 19:41:00 Authoring application: Microsoft Word 11.5.0
MD5: 3ba81b69dbc14f8d51d91df1f049dfca SHA-1: 4288cbf0b3b9c4ef6cc5b7aa347f43906da3c3d8 SHA-256: 747b627094b7f9c0c572be07fc6591af9875a3bb7a47e364ccca2ee287bf9bdd
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The ClamAV detection 'Doc.Trojan.Thus-10' strongly indicates malicious intent. The macro code appears to be designed to ensure its persistence and execution, likely to download and run a further stage.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-10 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-10
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_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
fa78ec2d4e30dcebbfb60ac4999cfa0be2d50bd4f7b9a22224258ee898a980a1		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2347 bytes
Detection
ClamAV: Doc.Trojan.Thus-10
Obfuscation or payload: unlikely

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