Office (OLE) / .DOC malware analysis — malicious · 62cddfcd22ba2187

MALICIOUS

Office (OLE) / .DOC

393.5 KB Created: 2010-02-10 11:12:00 Authoring application: Microsoft Word 8.0

MD5: b218ea31f08548e3103237bd6eda6bbe SHA-1: 421e92b25820517249d9c31d6c5b87145c229cfd SHA-256: 62cddfcd22ba218788a241e2fcbbc4850f300871d2b497046251b5d70657ac8a

260 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Word document containing VBA macros, indicated by multiple high-severity heuristic firings including AutoOpen and Document_Open. The embedded VBA script attempts to disable virus protection and copy itself to the NormalTemplate, likely to establish persistence or facilitate the execution of a secondary payload. The ClamAV detection name 'Doc.Trojan.Thus-10' further confirms its malicious nature.

Heuristics 6

ClamAV: Doc.Trojan.Thus-10 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Thus-10
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.
AutoOpen macro high OLE_VBA_AUTOOPEN

AutoOpen macro
Document_Open macro high OLE_VBA_DOCOPEN

Document_Open macro
Auto_Close macro high OLE_VBA_AUTOCLOSE

Auto_Close 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` `f3690c97d2bbf4dd58ff54ea93c11c54817584d0ddd943bc23bc664398ec2ee1`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	4128 bytes
Detection ClamAV: Doc.Trojan.Thus-10 Obfuscation or payload: unlikely

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