Office (OLE) malware analysis — malicious · b8a5defafa49ec59

MALICIOUS

Office (OLE)

93.0 KB Created: 2002-10-27 06:03:00 Authoring application: Microsoft Word 8.0

MD5: 013835183e382d02d1a3cd8f9c0c914b SHA-1: d71a702a483f6d17f8345a6da74a4a124d8e07ec SHA-256: b8a5defafa49ec59abe0ce79ca75770566016d8c7da45e945387265ea9db3073

220 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature Doc.Trojan.Twno-3. Static analysis detected VBA macros, including AutoOpen and Auto_Close functions, indicating that the document is designed to execute code automatically when opened or closed. The presence of these macros suggests the document's primary purpose is to deliver a malicious payload.

Heuristics 5

ClamAV: Doc.Trojan.Twno-3 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Twno-3
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
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` `1e86c1f12dd0d4026c7ddab7a2112791460be669348037b97b2e8985fd43d78b`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	1264 bytes
Detection ClamAV: Doc.Trojan.Twno-3 Obfuscation or payload: unlikely

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