Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 15ad6ef8fc0ca76d…

MALICIOUS

Office (OLE)

111.5 KB Created: 2009-01-29 17:50:00 Authoring application: Microsoft Word 11.5.0
MD5: f0d82a528b8f24c4f44766b1cd62be3d SHA-1: f188f9eba4faf8950264d8f9e87c5502cbb6bb3c SHA-256: 15ad6ef8fc0ca76d89afeead6bd748de4e94164da55fcdcee5575b8344c63ab4
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 critical indicator of malicious intent. The ClamAV heuristic also identifies the file as 'Doc.Trojan.Thus-8'. The macro code appears to be designed to ensure its persistence and execution, likely to download and run a second-stage payload. No specific family could be identified, but the behavior is consistent with a macro-based downloader.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-8 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-8
  • 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
a6a46a9c7470b14dec57ff3ada58bdc5f6f2ce06e06980ff0fa586da0ee331c7		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2382 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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