MALICIOUS
140
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1203 Exploitation for Client Execution
The file contains Excel 4.0 macros, specifically an Auto_Open defined name, which is a critical finding indicating the potential for automatic execution upon opening. The presence of dangerous formula APIs like RUN further suggests malicious intent. This mechanism is commonly used to download and execute secondary payloads, making it a high-risk artifact.
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) | 6806 bytes |
SHA-256: 6dfe29a8078d37ae27f5b408ca5cef05511d2b70320f47356c3e833bbe4fea1e |
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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 18 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - jVawhFrtJ ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!B182 ' 0018 23 LABEL : Cell Value, String Constant - CQdpctHx len=0 ' 0018 24 LABEL : Cell Value, String Constant - CrkjMJTca len=0 ' 0018 20 LABEL : Cell Value, String Constant - eZdNx len=0 ' 0018 23 LABEL : Cell Value, String Constant - FaPpbGqJ len=0 ' 0018 24 LABEL : Cell Value, String Constant - fBaGxbjpf len=0 ' 0018 25 LABEL : Cell Value, String Constant - FkcwsrsARo len=0 ' 0018 23 LABEL : Cell Value, String Constant - hyAhNUQm len=0 ' 0018 25 LABEL : Cell Value, String Constant - jYQZetUJpD len=0 ' 0018 22 LABEL : Cell Value, String Constant - nFuksoz len=0 ' 0018 20 LABEL : Cell Value, String Constant - nPrvH len=0 ' 0018 26 LABEL : Cell Value, String Constant - RiCPmGqRGIA len=0 ' 0018 25 LABEL : Cell Value, String Constant - rsWZFPOPAl len=0 ' 0018 26 LABEL : Cell Value, String Constant - SWWdbVbJvzp len=0 ' 0018 27 LABEL : Cell Value, String Constant - UEoaWsttAvSD len=0 ' 0018 25 LABEL : Cell Value, String Constant - vAvlMbcZPn len=0 ' 0018 20 LABEL : Cell Value, String Constant - WHewe len=0 ' 0018 21 LABEL : Cell Value, String Constant - WPUvLL len=0 ' 0018 26 LABEL : Cell Value, String Constant - WUOcENCNTij len=0 ' 0018 26 LABEL : Cell Value, String Constant - XQPKQyVfOAs len=0 ' 0018 22 LABEL : Cell Value, String Constant - zhaWbYR 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 ' 00 ... (truncated) |
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