Office (OLE) malware analysis — malicious · 77ab07f322ed8039

MALICIOUS

Office (OLE)

61.0 KB Created: 2009-02-26 17:37:00 Authoring application: Microsoft Word 8.0

MD5: 9d7281a68e3f0b8a034a4a927cb34bc6 SHA-1: a360e5f95703f164f0426e1cda1bb6294f1c66e5 SHA-256: 77ab07f322ed8039f34445290dc8592d4df7bcfa04803962f5c1c91a3ba10ffb

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The sample is a malicious Office document containing VBA macros, specifically an AutoOpen macro, which is a common technique for initial execution. The macros attempt to write a file named 'Iron.tmp' to the 'c:\' directory. This suggests the document is likely a downloader or dropper for a secondary payload.

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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