MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file is an Excel 4.0 macro-enabled workbook containing an Auto_Open defined name, which is a critical finding indicating automatic execution upon opening. The presence of dangerous formula APIs, specifically 'RUN', suggests the macro is designed to execute external commands. While the exact payload is not visible, the technique strongly implies the download and execution of a second-stage malicious file.
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) | 6433 bytes |
SHA-256: 36d7c495099120d19259305198da7de9535dbae4bba7b424aeacfb08b95cffc6 |
|||
Preview scriptFirst 1,000 lines of the extracted script
' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Sheet ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - WPV ' 0018 23 LABEL : Cell Value, String Constant - ArvKKGNa len=0 ' 0018 27 LABEL : Cell Value, String Constant - aSKjgFZqIsfA len=0 ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!G181 ' 0018 27 LABEL : Cell Value, String Constant - bCVoZRSZTTfU len=0 ' 0018 27 LABEL : Cell Value, String Constant - BSTShmoKvtgb len=0 ' 0018 23 LABEL : Cell Value, String Constant - btYDeCne len=0 ' 0018 21 LABEL : Cell Value, String Constant - cKmQQR len=0 ' 0018 22 LABEL : Cell Value, String Constant - cuWUqAA len=0 ' 0018 20 LABEL : Cell Value, String Constant - fnaRw len=0 ' 0018 21 LABEL : Cell Value, String Constant - lizSpr len=0 ' 0018 25 LABEL : Cell Value, String Constant - mbKdxFzkPk len=0 ' 0018 25 LABEL : Cell Value, String Constant - MWbKoSClCc len=0 ' 0018 26 LABEL : Cell Value, String Constant - oGcbvUeyOoP len=0 ' 0018 20 LABEL : Cell Value, String Constant - OIAtd len=0 ' 0018 27 LABEL : Cell Value, String Constant - pdAoZpsrMWTR len=0 ' 0018 21 LABEL : Cell Value, String Constant - ShZXAD len=0 ' 0018 27 LABEL : Cell Value, String Constant - SShyDLfxRGkq len=0 ' 0018 20 LABEL : Cell Value, String Constant - sSZCm len=0 ' 0018 24 LABEL : Cell Value, String Constant - UoYwXWPxY len=0 ' 0018 20 LABEL : Cell Value, String Constant - zeQBl len=0 ' 0018 24 LABEL : Cell Value, String Constant - zogGhLjGW 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 ... (truncated) |
|||
Open this report in the interactive analyzer, or submit your own file for analysis.