Office (OLE) malware analysis — malicious · a046b0546a0043d6

MALICIOUS

Office (OLE)

41.0 KB Created: 2007-04-12 14:05:00 Authoring application: Microsoft Word 8.0

MD5: c9315461a32630b5f65cc621174d04f4 SHA-1: 845448a6a7fddf993463d0f1df05652f38e31ed5 SHA-256: a046b0546a0043d618dc4c55fbf5a1d7f668e406af2f550beca54062d6d81467

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic

The file is identified as malicious by ClamAV with the signature Doc.Trojan.Nori-1. Static analysis detected a VBA macro, specifically an AutoOpen macro, which is a common technique for executing malicious code upon opening the document. The macro source is 8080 bytes, indicating a potentially complex payload. No specific IOCs were extracted, but the presence of the AutoOpen macro strongly suggests an attempt to run arbitrary code.

Heuristics 4

ClamAV: Doc.Trojan.Nori-1 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Nori-1
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
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` `50b5a091f6f5cee4ab646dbb9f6e9a98f8914782018ff8b704d7dfc1f28db34f`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	8080 bytes
Detection ClamAV: Doc.Trojan.Nori-1 Obfuscation or payload: unlikely

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