Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1bfbd61bede35b0b…

MALICIOUS

Office (OLE)

67.5 KB Created: 2010-01-11 17:23:00 Authoring application: Microsoft Word 11.5.5
MD5: 1b94dcf5305c65676d8acbd44d62eedd SHA-1: b14c045ab315dfce788d75850e44d34c222f5d71 SHA-256: 1bfbd61bede35b0ba289e56f0cedaa6abb4a063121ddb0b6e3fd31cace9a47ca
180 Risk Score

Malware Insights

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

The file is an Office document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The presence of the 'Doc.Trojan.Thus-8' ClamAV signature strongly indicates malicious intent. The macro is likely designed to download and execute a secondary payload, although the specific payload and download mechanism are not detailed in the provided evidence.

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
a2fa8fe7956054e4e2d26a300df497733367e2820bb1c88d340643554779f128		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2404 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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