MALICIOUS
100
Risk Score
Malware Insights
MITRE ATT&CK
T1204.002 User Execution: Malicious File
T1059.005 Command and Scripting Interpreter: Visual Basic
The sample is an Excel 4.0 macro-enabled spreadsheet that uses a common lure to trick users into enabling macros. Upon enabling, the Auto_Open macro executes a command that decodes and downloads a payload from the URL 'http://0xc12a24f5/cc.html'. The macro is obfuscated using character escaping, but the reconstructed command is clear. The presence of an Auto_Open macro and the lure strongly indicate malicious intent.
Heuristics 3
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Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAMEoletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
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Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPENWorkbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.
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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txt0807f652a36752efcd354ce3c536f2fe7ed4cd53a3ff1787c33acb378dda90a0 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 1073 bytes |
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