Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9f9292b4488b0789…

MALICIOUS

Office (OLE)

32.5 KB Created: 2000-11-30 14:01:00 Authoring application: Microsoft Word 8.0
MD5: 3aa12f9fb30f62cd4662dd4f2ce21f04 SHA-1: aae99078553dbc2861e3ee97ac4f32061495bc02 SHA-256: 9f9292b4488b0789ff4957ac3334657129ee9e4f4ebb084d7bc3173ca50587d7
300 Risk Score

Malware Insights

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

The file contains a VBA macro that automatically executes upon opening, indicated by the 'Document_Open' and 'OLE_VBA_PCODE_AUTOEXEC_EXEC' heuristics. The 'CreateObject' call suggests the macro is designed to run external code. ClamAV detections for 'Win.Trojan.Psycho-3' and 'Doc.Trojan.Melissa-4' confirm its malicious nature. The document body discusses corporate fashion and appears to be a lure, with the macro serving as the delivery mechanism for the detected malware.

Heuristics 7

  • ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Psycho-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.
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXEC
    Compiled VBA/cache stream contains an auto-execution token together with shell/download/object-execution tokens. This catches p-code-only or source-extraction-failure macro documents where visible source is unavailable.
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
d9b96e160d2fe61179057ebb96007cd4ea143b1f23dacc45a5bbb02fc859b67d		 vba-macro oletools.olevba.extract_macros (decoded VBA source) 3743 bytes
Detection
ClamAV: Doc.Trojan.Melissa-4
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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