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 entry, which is a critical finding indicating automatic execution upon opening. The macro sheet also uses dangerous formula APIs, specifically the RUN function, suggesting it's designed to execute arbitrary code. While no specific URLs or hashes were extracted, the presence of Auto_Open and the use of the RUN function strongly indicate a malicious intent to execute a payload.
Heuristics 3
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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.
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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.
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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) | 6725 bytes |
SHA-256: 8318b778ae48aa3cab4f04dac7435be248a3b11111cc8c39548005558f5d8cc6 |
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Preview scriptFirst 1,000 lines of the extracted script
' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - qDWvL ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!C161 ' 0018 20 LABEL : Cell Value, String Constant - dAVDa len=0 ' 0018 22 LABEL : Cell Value, String Constant - DEKmMlz len=0 ' 0018 24 LABEL : Cell Value, String Constant - dlcnSQQGC len=0 ' 0018 25 LABEL : Cell Value, String Constant - dLWKGABGYL len=0 ' 0018 22 LABEL : Cell Value, String Constant - epIBeVD len=0 ' 0018 24 LABEL : Cell Value, String Constant - fnvPCeUrh len=0 ' 0018 24 LABEL : Cell Value, String Constant - hLysHMYiH len=0 ' 0018 20 LABEL : Cell Value, String Constant - iacxH len=0 ' 0018 24 LABEL : Cell Value, String Constant - IwMkdrImY len=0 ' 0018 26 LABEL : Cell Value, String Constant - IXxSdhItynd len=0 ' 0018 26 LABEL : Cell Value, String Constant - MHBcvlqusoC len=0 ' 0018 21 LABEL : Cell Value, String Constant - OeesBy len=0 ' 0018 21 LABEL : Cell Value, String Constant - OShmQR len=0 ' 0018 21 LABEL : Cell Value, String Constant - RurpcQ len=0 ' 0018 24 LABEL : Cell Value, String Constant - vfgoqFvJj len=0 ' 0018 20 LABEL : Cell Value, String Constant - VLOIw len=0 ' 0018 22 LABEL : Cell Value, String Constant - vZWZdiQ len=0 ' 0018 26 LABEL : Cell Value, String Constant - WaDToeEtEPA len=0 ' 0018 24 LABEL : Cell Value, String Constant - weakIQwup len=0 ' 0018 26 LABEL : Cell Value, String Constant - WGzVBUhHLCq 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 LABEL ... (truncated) |
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