MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file is an Excel macro-enabled document containing Excel 4.0 (XLM) macros. Critical heuristics indicate the presence of an Auto_Open defined name and the use of dangerous formula APIs, specifically the RUN function, which is commonly used to execute arbitrary commands. This suggests the macro is designed to download and execute a second-stage 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) | 6622 bytes |
SHA-256: 8c6d5ff559a24b5def8eab32002e49a7560b7de18d69cc38a5fb91308118436d |
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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 20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - cPmboGleSKR ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!D157 ' 0018 24 LABEL : Cell Value, String Constant - bVXrcdXGe len=0 ' 0018 26 LABEL : Cell Value, String Constant - CuUpfspDlbO len=0 ' 0018 26 LABEL : Cell Value, String Constant - DwDSCjALIRF len=0 ' 0018 20 LABEL : Cell Value, String Constant - jgzuR len=0 ' 0018 21 LABEL : Cell Value, String Constant - jxcTkO len=0 ' 0018 26 LABEL : Cell Value, String Constant - kMqZGYbXpjr len=0 ' 0018 26 LABEL : Cell Value, String Constant - mpMYbItMbKJ len=0 ' 0018 23 LABEL : Cell Value, String Constant - MRvvOxNm len=0 ' 0018 24 LABEL : Cell Value, String Constant - NZPmNzeFA len=0 ' 0018 25 LABEL : Cell Value, String Constant - oTkYxasROQ len=0 ' 0018 21 LABEL : Cell Value, String Constant - PkKDCm len=0 ' 0018 24 LABEL : Cell Value, String Constant - QRjPsaQeT len=0 ' 0018 24 LABEL : Cell Value, String Constant - rguRLctlj len=0 ' 0018 22 LABEL : Cell Value, String Constant - SMIYmWg len=0 ' 0018 22 LABEL : Cell Value, String Constant - WHofvUd len=0 ' 0018 21 LABEL : Cell Value, String Constant - wiJdWp len=0 ' 0018 27 LABEL : Cell Value, String Constant - wqPbxMFlTnqA len=0 ' 0018 21 LABEL : Cell Value, String Constant - XUTarF len=0 ' 0018 21 LABEL : Cell Value, String Constant - ZhWZTU len=0 ' 0018 21 LABEL : Cell Value, String Constant - ZupMPS 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 ... (truncated) |
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