Office (OLE) / .DOC malware analysis — malicious · a64ba6781ebf6e20

MALICIOUS

Office (OLE) / .DOC

30.0 KB Created: 2010-09-18 12:51:00 Authoring application: Microsoft Word 11.5.6

MD5: 07820d9da0210d519ca4c58599d54af9 SHA-1: 0b1f8b0e222332ef8f7f6f88525e08ff1529a741 SHA-256: a64ba6781ebf6e208e41187ad58607eb159cbe0703b210d5f1432ead34700274

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a malicious Microsoft Word document containing VBA macros, specifically a Document_Open macro. ClamAV signatures identify it as Doc.Trojan.Thus-4. The presence of the Document_Open macro suggests an attempt to automatically execute malicious code upon opening the document, likely to download and execute a secondary payload. The document body content is irrelevant to the malicious functionality.

Heuristics 4

ClamAV: Doc.Trojan.Thus-4 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Thus-4
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` `8c59e0555f277c78ade02ca123ba0273eb5c63f4d28075deb1b95e3c59dbf822`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2359 bytes
Detection ClamAV: Doc.Trojan.Thus-4 Obfuscation or payload: unlikely

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