Win.Trojan.Psycho-3 — Office (OLE) malware analysis

Static analysis result for SHA-256 08146d416fca2f8d…

MALICIOUS

Office (OLE)

79.0 KB Created: 2010-03-22 20:22:00 Authoring application: Microsoft Word 10.1
MD5: 3638c2a141866bc6b72fe8ea84af6e3e SHA-1: e45537b61247b1b5f9f8921439f25fed6194f864 SHA-256: 08146d416fca2f8d88d459713f6e285a3ba21890a3d367ac51941cd2edf23d06
260 Risk Score

Malware Insights

Win.Trojan.Psycho-3 · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The sample contains VBA macros, specifically a Document_Open macro that executes upon opening. This macro uses CreateObject to interact with Outlook, attempting to email copies of the document to recipients found in the Outlook address book. The ClamAV detection of 'Win.Trojan.Psycho-3' and 'Doc.Trojan.Melissa-4' strongly suggests a known malware family with worm-like capabilities.

Heuristics 6

  • 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.
  • 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: unlikely

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