MALICIOUS
200
Risk Score
Malware Insights
MITRE ATT&CK
T1059.003 Windows Command Shell
T1566.001 Spearphishing Attachment
The file is identified as Win.Trojan.Onyx-1 by ClamAV, indicating a malicious trojan. The document body contains embedded commands and references to registry keys and batch files, such as 'Start.bat' and 'Msn.scp', suggesting a multi-stage execution. The presence of 'debug < Msn.scp' and 'debug < readme.txt' implies these files are used in the infection chain. The authoring application and creation date suggest an older malware variant.
Heuristics 3
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ClamAV: Win.Trojan.Onyx-1 critical CLAMAV_DETECTIONClamAV detected this file as malware: Win.Trojan.Onyx-1
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Embedded Office document has suspicious static findings critical EMBEDDED_OFFICE_CHILD_STATIC_TRIAGEA CFB/OLE Office document was found inside another file type and its carved contents matched Office exploit or payload heuristics. This catches wrapped exploit documents where the top-level file routes to a PE, archive, or generic scanner instead of Office.
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CFB header with no readable streams medium OLE_PARSE_EMPTY_STREAMSThe file begins with a valid OLE2/CFB header but exposes no directory streams. A non-empty compound document with an unreadable directory is anomalous — it is seen with truncated/corrupt files and, more importantly, with content deliberately shifted off byte boundaries to defeat parsers while the host application still recovers the object.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
embedded_office_off00002f09.ole |
embedded-office | Embedded OLE/CFB Office body inside ole container at offset 0x2F09 | 13559 bytes |
SHA-256: 88d3bc8e78cefb60a7dfcb6bf0a558e96a06101b9386ebdc2d3b64ebbc445ba5 |
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Detection
ClamAV:
Win.Trojan.Onyx-1
Obfuscation or payload:
unlikely
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