MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The sample is an Excel file containing Excel 4.0 macros, indicated by the OLE_XLM_AUTOOPEN and OLE_XLM_DANGEROUS_FN heuristics. The presence of an 'Auto_Open' defined name suggests that the macro will execute automatically when the workbook is opened. The dangerous formula API usage (RUN=0) points towards the execution of arbitrary code, likely to download and execute a second-stage payload.
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.txt |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 6760 bytes |
SHA-256: 48ac1ce000575533681889599ee04501712fb9b61b3a78cc926a078bcf3f502d |
|||
Preview scriptFirst 1,000 lines of the extracted script
' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Sheet ' 0085 16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - CqKpGYz ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!E183 ' 0018 20 LABEL : Cell Value, String Constant - aYvme len=0 ' 0018 21 LABEL : Cell Value, String Constant - dGdSit len=0 ' 0018 20 LABEL : Cell Value, String Constant - DkEKr len=0 ' 0018 23 LABEL : Cell Value, String Constant - DXTAdzoF len=0 ' 0018 26 LABEL : Cell Value, String Constant - FLvqasdafJU len=0 ' 0018 23 LABEL : Cell Value, String Constant - fVZssiCi len=0 ' 0018 22 LABEL : Cell Value, String Constant - fzWunOd len=0 ' 0018 23 LABEL : Cell Value, String Constant - LODJhTyM len=0 ' 0018 25 LABEL : Cell Value, String Constant - LYPMuTzFMw len=0 ' 0018 20 LABEL : Cell Value, String Constant - qqdrS len=0 ' 0018 23 LABEL : Cell Value, String Constant - RFTjbcRq len=0 ' 0018 26 LABEL : Cell Value, String Constant - RNrXmMFNobF len=0 ' 0018 24 LABEL : Cell Value, String Constant - rybFCcDXD len=0 ' 0018 24 LABEL : Cell Value, String Constant - SKHcjBreO len=0 ' 0018 26 LABEL : Cell Value, String Constant - ugAUqhxaIux len=0 ' 0018 25 LABEL : Cell Value, String Constant - UVeDMzOXVs len=0 ' 0018 21 LABEL : Cell Value, String Constant - vnyfDK len=0 ' 0018 26 LABEL : Cell Value, String Constant - WUpwiNXWMwX len=0 ' 0018 22 LABEL : Cell Value, String Constant - ykWIZPo len=0 ' 0018 22 LABEL : Cell Value, String Constant - yPrfNsO len=0 ' 002a 2 PRINTHEADERS : Print Row/Column Labels ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LABELSST : Cell Value, String Constant/ SST ' 00fd 10 LAB ... (truncated) |
|||
Open this report in the interactive analyzer, or submit your own file for analysis.