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 sheet that contains an Auto_Open entry, indicating it will execute macros automatically upon opening. Heuristics indicate the use of dangerous formula APIs, suggesting the macro is designed to execute arbitrary code. The presence of an Auto_Open entry and the use of dangerous functions strongly suggest the intent is to download and execute a secondary 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) | 6564 bytes |
SHA-256: 1884058858262f45ea29adef0693cf9eeb9341afb5023dfd489ecb9543884d35 |
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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 13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - xFNx ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!B142 ' 0018 24 LABEL : Cell Value, String Constant - dXyAfBgur len=0 ' 0018 27 LABEL : Cell Value, String Constant - ffvJfjBmeOIV len=0 ' 0018 20 LABEL : Cell Value, String Constant - hyGOH len=0 ' 0018 24 LABEL : Cell Value, String Constant - jlbdpLDCK len=0 ' 0018 22 LABEL : Cell Value, String Constant - kQdCnoL len=0 ' 0018 22 LABEL : Cell Value, String Constant - kRsAavw len=0 ' 0018 24 LABEL : Cell Value, String Constant - MaHKnjzml len=0 ' 0018 25 LABEL : Cell Value, String Constant - NAYvomNFQP len=0 ' 0018 20 LABEL : Cell Value, String Constant - NAZCQ len=0 ' 0018 22 LABEL : Cell Value, String Constant - NwJhurX len=0 ' 0018 22 LABEL : Cell Value, String Constant - OaSvZYc len=0 ' 0018 25 LABEL : Cell Value, String Constant - okqauGgmdZ len=0 ' 0018 20 LABEL : Cell Value, String Constant - OsOiR len=0 ' 0018 26 LABEL : Cell Value, String Constant - oysrWecNqpq len=0 ' 0018 26 LABEL : Cell Value, String Constant - pjlkdPjzCIe len=0 ' 0018 21 LABEL : Cell Value, String Constant - qsdQVX len=0 ' 0018 25 LABEL : Cell Value, String Constant - TAQFWmTqUC len=0 ' 0018 22 LABEL : Cell Value, String Constant - tBVHSic len=0 ' 0018 23 LABEL : Cell Value, String Constant - xTtZVqyM len=0 ' 0018 25 LABEL : Cell Value, String Constant - zzhnxdqaNs 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) |
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