MALICIOUS
262
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1566.001 Spearphishing Attachment
The file contains Excel 4.0 macros, specifically an Auto_Open entry, which is a strong indicator of malicious intent. These macros are designed to execute and download payloads from the provided URLs. The ClamAV detection as 'Doc.Downloader.Qbot' further supports the classification as a Qbot downloader.
Heuristics 6
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ClamAV: Doc.Downloader.Qbot11202120-9906200-0 critical CLAMAV_DETECTIONClamAV detected this file as malware: Doc.Downloader.Qbot11202120-9906200-0
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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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URL reconstructed from XLM cell array (3 URLs) critical OLE_XLM_CELL_ARRAY_URLExcel 4.0 macro sheet stages its payload URL across the BIFF8 Shared String Table (one quoted-char SST entry concatenated with & at runtime) or across individual numeric cells (one ASCII charcode per cell). The reconstructed URL is invisible to literal-bytes URL extraction because it is never contiguous in the workbook stream. URLs were recovered by walking the BIFF8 record stream and decoding SST entries plus LABELSST/RK/NUMBER cells.
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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.
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Embedded URL info EMBEDDED_URLOne or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.URL https://dongarza.com/gJW5ma382Z/x.html Referenced by macro
- https://headlinepost.net/3AkrPbRj/x.htmlReferenced by macro
- https://produtoratimedeelenco.com.br/9E6Y322u/x.htmlReferenced by macro
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txt2d69a468deda6ef532bccca4917aca41c7abe1a521540a9fe9f977b5d05e05bf |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 11378 bytes |
Preview scriptFirst 1,000 lines of the extracted script
' 0085 13 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Simb ' 0085 13 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Shee ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sburr ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sbuur ' 0085 14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Rgedw ' 0085 11 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - KU ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Buk ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Buk ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Buk ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Buk ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Buk ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Buk ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Buk ' 0085 12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, hidden - Buk ' 0018 29 LABEL : Cell Value, String Constant - _xlfn.ARABIC hidden len=2 ptgErr *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x1d' ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Simb!E1 ' 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 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 Val ... (truncated) |
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