Office (OLE) / .DOC malware analysis — malicious · 55eb3ef3662c9134

MALICIOUS

Office (OLE) / .DOC

37.5 KB Created: 2007-06-21 09:24:00 Authoring application: Microsoft Word 8.0

MD5: da4e1e4f093b43e303e769894d8baf40 SHA-1: 452f4cdeb0bb6f0795d7c1d3858b1bebd67fd793 SHA-256: 55eb3ef3662c9134ad2c11950ac7bf189592eccb1e869c90f63cf35ba96157c7

308 Risk Score

Malware Insights

MITRE ATT&CK

T1059.005 Visual Basic for Applications T1566.001 Spearphishing Attachment T1140 Deobfuscate/Decode Files or Information

The sample is a Microsoft Word document containing VBA macros, specifically triggering AutoOpen and Auto_Close functions, and utilizing CreateObject. The document body presents a fake evaluation test to lure the user into enabling macros. The presence of VBA macros and the AutoOpen/Auto_Close heuristics indicate an attempt to execute code upon opening or closing the document. ClamAV detection as 'Doc.Trojan.Verlor-3' further confirms its malicious nature. The primary attack pattern involves social engineering through a deceptive document to facilitate macro execution, likely for downloading a secondary payload.

Heuristics 8

ClamAV: Doc.Trojan.Verlor-3 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Doc.Trojan.Verlor-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
CreateObject call high OLE_VBA_CREATEOBJ

CreateObject call
Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
VBA macros detected medium OLE_VBA_MACROS

Document contains VBA macro code
Environ() call (env variable access) low OLE_VBA_ENVIRON

Environ() call (env variable access)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`macros.bas` `7db18b11473f1460406024b292cab8af920fd1dfaa24f1ed0ceec6c6965faa74`	vba-macro	oletools.olevba.extract_macros (decoded VBA source)	24956 bytes
Detection ClamAV: Doc.Trojan.Verlor-3 Obfuscation or payload: likely Carved artifact contains 24 Chr/ChrW string-construction calls. Carved macro source contains an auto-exec entry point and execution/download terms.

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