Office (OLE) malware analysis — malicious · 1f7965a261c62739

MALICIOUS

Office (OLE)

46.0 KB Created: 2009-03-18 16:18:00 Authoring application: Microsoft Word 8.0

MD5: d4c62681dab47885d2d73b7eb5c2ddf7 SHA-1: 983274552feb9756caac6a7a99099e4682b92ad1 SHA-256: 1f7965a261c6273904ebde9f2b3d51868fabab51a3682eace45e3fd35bd1841c

180 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.Nori-1. Static analysis revealed the presence of VBA macros, specifically an AutoOpen macro, which is a common technique for executing malicious code when a document is opened. The extracted VBA macro file 'macros.bas' is the primary artifact. The document body discusses environmental issues in Kazakhstan, which appears to be a lure to disguise the malicious intent of the embedded macro.

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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