MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1204.002 Malicious File
The critical OLE_XLM_DANGEROUS_FN heuristic indicates the presence of an Excel 4.0 macro sheet with a 'RUN' function, which is a strong indicator of malicious intent. The macro sheet contains concatenated strings that reconstruct the following URLs: "http://unross.site/SVmGtFWs/I.png", "https://alexadrivingschool.online/ViaawNbw/I.png", and "https://adboat.live/TCA1oiqkA/I.png". These URLs are likely used to download and execute a second-stage payload. The presence of an Auto_Open macro further supports the malicious nature of the file.
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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XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FNExcel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
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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.txt4ce2eca84e77657cf47cd88188d1109ed7a2a5940734c07a9d94627fa54370cf |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 7149 bytes |
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