MALICIOUS
180
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1566.001 Spearphishing Attachment
The file is an Excel 4.0 spreadsheet containing an Auto_Open macro, indicated by multiple critical heuristic firings. The Auto_Open function is known to be used for executing malicious code upon opening the document. The presence of 'RUN=490' within the macro sheet suggests the execution of a command, which is a common technique for downloading and executing further stages of malware. The document body contains what appears to be employee data, possibly a lure to make the document seem legitimate.
Heuristics 3
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Excel 4.0 (XLM) Auto_Open + macro sheet critical OLE_XLM_AUTOOPENWorkbook contains an Auto_Open / Auto_Close defined name together with an Excel 4.0 macro sheet — the canonical XLM auto-execution shape used by malware families such as Emotet and QakBot.
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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.
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txt9326a9d6d69049bea9d03f285778a70b7039ae7998f9beecad17745d430712cf |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 134628 bytes |
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