MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1059.001 PowerShell
T1566.001 Spearphishing Attachment
The file is an Excel 4.0 spreadsheet containing an Auto_Open macro, which is a known technique for executing malicious code upon opening. The critical heuristic firings indicate the presence of an Auto_Open defined name and the use of dangerous formula APIs, specifically the RUN function, to execute arbitrary commands. This suggests the file is designed to deliver a payload or perform other malicious actions immediately after being opened by a user.
Heuristics 3
-
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.
-
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.
-
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.txt5101426a023b224cdde6a049f4a41271b63c50d629919a99911c2c0a0c6490ea |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 6356 bytes |
Open this report in the interactive analyzer, or submit your own file for analysis.