Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 138df4feaa0f26b6…

MALICIOUS

Office (OLE)

32.0 KB Created: 2010-05-06 11:52:00 Authoring application: Microsoft Word 11.5.6
MD5: 66f9ec056d5aa28912b9dd26c816986a SHA-1: 099e9c13f069e0268978ac51d6ed2e5381cec197 SHA-256: 138df4feaa0f26b6b782c96592c6df5623d3eb4943cea74ed48c252db6bd1172
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-8' 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-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
0b87df89b52adefdc12f74f070b7d84e29b3551a24df0f14f3d8937c3e6bc0af		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2342 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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