Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1a5d0b5678a4f6ab…

MALICIOUS

Office (OLE)

36.5 KB Created: 2010-03-11 14:01:00 Authoring application: Microsoft Word 11.5.6
MD5: 7711ad78c57c45c0ae3f74889a599e9f SHA-1: ac62cf5fbce284ee801f19db58d3d2d2a11b284c SHA-256: 1a5d0b5678a4f6abd81bac32d7b611cffeab5ec409d35b5c1f2388406bc5244a
180 Risk Score

Malware Insights

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

The file contains a malicious VBA macro, specifically a Document_Open macro, which is a common technique for initial execution. The document body presents a programming challenge, likely a lure to trick the user into enabling and running the macro. The macro itself is 4261 bytes and is flagged by ClamAV as Doc.Trojan.Marker-40 and Doc.Trojan.Marker-2 on extracted artifacts, indicating it's designed to download and execute a secondary payload.

Heuristics 4

  • ClamAV: Doc.Trojan.Marker-40 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Marker-40
  • 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
4d840735f64370eed491ae174d4c3cebc63d105512970d4d44c50b8d8ee19f18		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 4261 bytes
Detection
ClamAV: Doc.Trojan.Marker-2
Obfuscation or payload: unlikely

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