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. Heuristics indicate the presence of an Auto_Open macro that utilizes dangerous formula APIs, specifically the RUN function. This suggests the macro is designed to execute arbitrary code, likely downloading and running a second-stage payload. The document body contains obfuscated text, further supporting a malicious intent.
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) | 6494 bytes |
SHA-256: 627c4a7cfda7ac58e46e16fd6f30e9a8dbd5bc87c4406257494e1608ea3b2ada |
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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 16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - IFyatnh ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!C177 ' 0018 20 LABEL : Cell Value, String Constant - bZpll len=0 ' 0018 20 LABEL : Cell Value, String Constant - cWKJH len=0 ' 0018 23 LABEL : Cell Value, String Constant - cZFkufBV len=0 ' 0018 21 LABEL : Cell Value, String Constant - dbGhnB len=0 ' 0018 21 LABEL : Cell Value, String Constant - eIiQlm len=0 ' 0018 26 LABEL : Cell Value, String Constant - gDmGZGYhFOh len=0 ' 0018 22 LABEL : Cell Value, String Constant - gYtCpjL len=0 ' 0018 26 LABEL : Cell Value, String Constant - irViMUjsByn len=0 ' 0018 26 LABEL : Cell Value, String Constant - lyTZTvSVUbz len=0 ' 0018 25 LABEL : Cell Value, String Constant - mhzrbfImsQ len=0 ' 0018 20 LABEL : Cell Value, String Constant - NLKsw len=0 ' 0018 22 LABEL : Cell Value, String Constant - NtfEPXs len=0 ' 0018 21 LABEL : Cell Value, String Constant - piFwCD len=0 ' 0018 24 LABEL : Cell Value, String Constant - RPitAwFUF len=0 ' 0018 20 LABEL : Cell Value, String Constant - uwSPc len=0 ' 0018 23 LABEL : Cell Value, String Constant - vaZdVnsd len=0 ' 0018 23 LABEL : Cell Value, String Constant - VlzByWjh len=0 ' 0018 27 LABEL : Cell Value, String Constant - VrqxMOeToJjy len=0 ' 0018 27 LABEL : Cell Value, String Constant - XDYWXTuRVDHR len=0 ' 0018 27 LABEL : Cell Value, String Constant - ZuYyfgfTvBOG 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 L ... (truncated) |
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