Office (OLE) malware analysis — malicious · 78b034b3620da12b

MALICIOUS

Office (OLE)

70.0 KB Created: 2008-08-15 04:43:00 Authoring application: Microsoft Word 10.1

MD5: 2b889eeb4a68f36f01d9b54a41e491b2 SHA-1: 1d21a8241595df6fe23e6611f1ab4b66951ec9a0 SHA-256: 78b034b3620da12bd49d33e067b46cafa86833942691e1f05d594f24388ca121

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1547.001 Registry Run Keys / Startup Folder

The sample is a malicious Office document containing VBA macros, specifically a Document_Open macro. This macro attempts to copy itself to the Normal template and any other open documents, indicating an effort to establish persistence. The ClamAV detection 'Doc.Trojan.Thus-8' further supports its malicious nature. The macro's logic suggests it aims to ensure its execution whenever Word is opened.

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` `148463b71af2433c061c528c6bb7ae214dfa6ef6dc4d157d2709c1351df19400`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	2349 bytes
Detection ClamAV: Doc.Trojan.Thus-8 Obfuscation or payload: unlikely

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