Malicious Office (OLE) / .DOC — malware analysis report

Static analysis result for SHA-256 77acfd8478a2ad0e…

MALICIOUS

Office (OLE) / .DOC

28.0 KB Created: 2010-05-31 09:32:00 Authoring application: Microsoft Word 11.5.6
MD5: c198f9c7738e613485d093c9b31b5a4e SHA-1: f922da82787653c6b0696200b41a63a71ea41921 SHA-256: 77acfd8478a2ad0eb2d1920fb41f26b03a0e3c8e8d526c508ec960f8eb4a2aed
180 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment

The file is a malicious Microsoft Word document containing VBA macros, specifically a Document_Open macro, which is a common technique for initial execution. The ClamAV detection 'Doc.Trojan.Thus-8' further confirms its malicious nature. The document body presents itself as architectural photography, a likely lure to trick users into enabling macros. The Document_Open macro is designed to execute automatically when the document is opened, likely to download and execute a second-stage payload.

Heuristics 4

  • ClamAV: Doc.Trojan.Thus-8 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Trojan.Thus-8
  • 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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • VBA macros detected medium OLE_VBA_MACROS
    Document contains VBA macro code

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
9f27e075a184773a05e720caac253770baf16a80a89f610e73ebad7b2c04ee21
vba-macro oletools.olevba.extract_macros (decoded VBA source) 2009 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely