MALICIOUS
300
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1505.003 Server Software Component: Email Collection
T1071.001 Web Protocols: Web Protocol
The sample is a Microsoft Word document containing VBA macros, specifically an AutoOpen macro, which is a common delivery mechanism for older malware. The script attempts to disable security features and leverage Outlook to email itself to contacts, a hallmark of the Melissa virus family. The ClamAV detection of 'Win.Trojan.Melissa-4' further supports this attribution.
Heuristics 7
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ClamAV: Win.Trojan.Psycho-3 critical CLAMAV_DETECTIONClamAV detected this file as malware: Win.Trojan.Psycho-3
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ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAVClamAV 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.
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AutoOpen macro high OLE_VBA_AUTOOPENAutoOpen macro
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Document_Open macro high OLE_VBA_DOCOPENDocument_Open macro
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CreateObject call high OLE_VBA_CREATEOBJCreateObject call
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VBA p-code auto-exec with execution tokens high OLE_VBA_PCODE_AUTOEXEC_EXECCompiled 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.
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VBA macros detected medium OLE_VBA_MACROSDocument contains VBA macro code
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
macros.basb272887adbe23144b74256bb8722ccb04bd1ffc7501dfcde4d3fee5c93ce03be |
vba-macro | oletools.olevba.extract_macros (decoded VBA source) | 13135 bytes |
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Detection
ClamAV:
Doc.Trojan.Melissa-4
Obfuscation or payload:
unlikely
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