MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic for Applications
T1059.001 PowerShell
T1204.002 Malicious File
This Excel 4.0 macro-enabled workbook contains an Auto_Open defined name, indicating it will execute macros automatically upon opening. The critical heuristic firings confirm the presence of dangerous formula APIs, specifically the RUN function, which is commonly used to execute arbitrary code or download additional payloads. The macro sheet itself contains numerous obfuscated strings and a large amount of data, suggesting it is designed to conceal its malicious functionality.
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.txtcc915d63f67c6647b2c2e222626607c6120dd202294943e0f306895a813f9ce8 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 12649 bytes |
Open this report in the interactive analyzer, or submit your own file for analysis.