Office (OLE) malware analysis — malicious · 016ea2c61f5d0763

MALICIOUS

Office (OLE)

80.5 KB Created: 2009-09-12 19:04:00 Authoring application: Microsoft Word 11.2

MD5: 33ab26508b8b7cbf8e5f3fbf37c13356 SHA-1: 84a1a2a7860623127fa9421a4237a154b26f53b8 SHA-256: 016ea2c61f5d0763e2120c2668c2e1c2cbfa0173991a4df8a649e1dd88ab712b

180 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.005 Visual Basic

The file is a Microsoft Word document containing a VBA macro that is triggered by the Document_Open event. Heuristics indicate the presence of malicious VBA macros and specifically a Document_Open macro, which is a common technique for initial execution. The ClamAV detection confirms its malicious nature, identifying it as Doc.Trojan.Thus-5. The macro appears to be designed to disable virus protection and potentially download or execute a secondary payload, though the script is truncated.

Heuristics 4

ClamAV: Doc.Trojan.Thus-5 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Thus-5
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.

Filename	Kind	Source	Size
`macros.bas` `b0565d8ae42e9266c6a2bf457d9610c2d7ed0a7b0b3efdf39878207a98ba0f09`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2348 bytes
Detection ClamAV: Doc.Trojan.Thus-5 Obfuscation or payload: unlikely

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