Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5ff1d1e92a2f8e8a…

MALICIOUS

Office (OLE)

62.0 KB Created: 2010-03-26 19:46:00 Authoring application: Microsoft Word 11.5.6
MD5: af64ecdff95d0f7bdba1814987f70269 SHA-1: c4d53ffed9db18db139fd131a1caa00905b990a5 SHA-256: 5ff1d1e92a2f8e8accf8ab611b26354f4db26997e0c12c56c83dfcc27a3e6941
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 a Document_Open macro. This macro is designed to execute automatically when the document is opened, indicating an attempt to deliver a payload. The ClamAV detection 'Doc.Trojan.Thus-8' further confirms its malicious nature. The VBA code appears to be obfuscated and attempts to ensure persistence or re-infection.

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
1ccece81c605d2dd21439e496be35f987c75564aec148d77ed7584cb2535e163		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 2330 bytes
Detection
ClamAV: Doc.Trojan.Thus-8
Obfuscation or payload: unlikely

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