Office (OLE) malware analysis — malicious · 0431c5f40ed26d34

MALICIOUS

Office (OLE)

64.0 KB Created: 2009-05-15 13:52:00 Authoring application: Microsoft Word 11.0

MD5: 35ee001e1fa76217e558f44b3fa096af SHA-1: 2ca842c860c4f80582bf1b3516f5de41887e10dd SHA-256: 0431c5f40ed26d343819106be6122dc931d20b13a0b8e57aed58e67f23b9a253

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample contains VBA macros, specifically a Document_Open macro, which is a common technique for executing malicious code upon opening a document. The ClamAV detection 'Doc.Trojan.Thus-8' strongly indicates malicious intent. The macro code appears to be designed to ensure its persistence and execution, likely to download and run a second-stage payload.

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` `cd9bd60e93caf80b15ff1a29d64cd16c08cf6d86e1bf3859953000e7e8cedf2d`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2340 bytes
Detection ClamAV: Doc.Trojan.Thus-8 Obfuscation or payload: unlikely

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