MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1059.001 PowerShell
T1566.001 Spearphishing Attachment
The file contains Excel 4.0 macros, specifically an Auto_Open defined name, which is a critical finding. The presence of 'RUN=0' within the macro indicates a direct execution of a command. While the exact command is not fully reconstructed due to truncation, the technique strongly suggests the execution of a malicious payload. The macro sheet itself is named 'OkBqzfBCLcs', which is unusual and may be part of the obfuscation or a specific identifier.
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.txt500e771b0baeb0ba9ed525cd144c27ffa90f44351be6c1691dc5a2cdcf70cb39 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 6709 bytes |
Open this report in the interactive analyzer, or submit your own file for analysis.