Office (OLE) / .DOC malware analysis — malicious · 0b98e89c6e8a9a75

MALICIOUS

Office (OLE) / .DOC

38.5 KB Created: 2010-03-29 20:32:00 Authoring application: Microsoft Word 11.0

MD5: b9befca17910d362776d8bcaa9109c18 SHA-1: 1c3555f6b7731fdf257a5ae5632a1addbff6049e SHA-256: 0b98e89c6e8a9a757d892e0db6eef40010a1857b0f9d5d022c3da819882a49e5

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a malicious Word document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The ClamAV heuristic 'Doc.Trojan.Thus-8' strongly indicates malicious intent. The macro's primary function appears to be to download and execute a secondary payload, as suggested by the heuristic firings and the presence of obfuscated code within the VBA script.

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.

Filename	Kind	Source	Size
`macros.bas` `b5d6397a639aea7e2160842fc8169a05a961bba80fe717d2db5bd8ee955dd774`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2360 bytes
Detection ClamAV: Doc.Trojan.Thus-8 Obfuscation or payload: unlikely

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