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

Static analysis result for SHA-256 33ee5e7cba090f4e…

MALICIOUS

Office (OLE)

43.0 KB Created: 2008-11-12 15:48:00 Authoring application: Microsoft Word 11.3.8
MD5: 7107dbddc91673e016ed7e34e2f033cd SHA-1: 3f8900ce37e593d7649dc9923780fd06a8fa4a8e SHA-256: 33ee5e7cba090f4e7316785fd93a16a2cedc14564ac8a4fa64fac1623c5d5d96
260 Risk Score

Malware Insights

Win.Trojan.Psycho-3 · confidence 95%

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

The sample contains a VBA macro that executes upon opening the document, indicated by the Document_Open heuristic. This macro utilizes CreateObject to interact with Outlook, attempting to email itself to contacts. The ClamAV detections 'Win.Trojan.Psycho-3' and 'Doc.Trojan.Melissa-4' strongly suggest a known malware family associated with mass-mailing 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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