MALICIOUS
102
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic for Applications
T1204.002 Malicious File
The sample is an Excel 4.0 (XLM) macro-enabled spreadsheet that contains an Auto_Open macro, indicating it will execute automatically when the file is opened. It also contains a heuristic firing for an 'enable lure', suggesting the user is prompted to enable macros. The embedded URLs likely serve as download locations for a second-stage payload. No specific family could be identified.
Heuristics 4
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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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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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Macro/content-enable lure medium SE_ENABLE_LUREDocument instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
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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://signifysystem.com/ceg7AX7oN0o/ue.html In document text (OLE body)
- https://fcventasyservicios.cl/k60jvjcT/ue.htmlIn document text (OLE body)
Extracted artifacts 1
Files carved from inside the sample during analysis.
| Filename | Kind | Source | Size |
|---|---|---|---|
xlm_macros.txtc7d4d2bead8580d5104e88300cefa6eb3ebffd421d1191db8449676bfb792ff2 |
xlm-macro | oletools.olevba.extract_all_macros (XLM macro listing) | 8209 bytes |
Preview scriptFirst 1,000 lines of the extracted script
' 0085 11 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Doc1 ' 0085 11 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - Doc2 ' 0085 11 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - Doc3 ' 0085 11 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - Doc4 ' 0018 31 LABEL : Cell Value, String Constant - _xlfn.AGGREGATE hidden len=2 ptgErr *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x1d' ' 0018 30 LABEL : Cell Value, String Constant - _xlfn.F.INV.RT hidden len=2 ptgErr *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x1d' ' 0018 33 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=18 ptgRef3d 65535!A1 *UNKNOWN TOKEN* 0x0000 *INCOMPLETE FORMULA PARSING* Remaining, unparsed expression: b'\x00\x01\x00\x02\x00\x02\x00\x00\x00*' ' 002a 2 PRINTHEADERS : Print Row/Column Labels ' 002a 2 PRINTHEADERS : Print Row/Column Labels ' 002a 2 PRINTHEADERS : Print Row/Column Labels ' 0204 21 LABEL : Cell Value, String Constant ' 0204 21 LABEL : Cell Value, String Constant ' 0204 9 LABEL : Cell Value, String Constant ' 0204 10 LABEL : Cell Value, String Constant ' 0204 11 LABEL : Cell Value, String Constant ' 0204 9 LABEL : Cell Value, String Constant ' 0204 10 LABEL : Cell Value, String Constant ' 0204 11 LABEL : Cell Value, String Constant ' 0204 11 LABEL : Cell Value, String Constant ' 0204 10 LABEL : Cell Value, String Constant ' 0204 12 LABEL : Cell Value, String Constant ' 0204 11 LABEL : Cell Value, String Constant ' 0204 11 LABEL : Cell Value, String Constant ' 0204 12 LABEL : Cell Value, String Constant ' 0204 9 LABEL : Cell Value, String Constant ' 0204 11 LABEL : Cell Value, String Constant ' 0204 10 LABEL : Cell Value, String Constant ' 0204 14 LABEL : Cell Value, String Constant ' 0204 24 LABEL : Cell Value, String Constant ' 0204 29 LABEL : Cell Value, String Constant ' 0204 10 LABEL : Cell Value, String Constant ' 0204 14 LABEL : Cell Value, String Constant ' 0204 24 LABEL : Cell Value, String Constant ' 0204 30 LABEL : Cell Value, String Constant ' 002a 2 PRINTHEADERS : Print Row/Column Labels ' Sheet,Reference,Formula,Value ' Doc2,BJ15,65535!A1,"" ' Doc3,BQ6,"['*STACKERROR* not enough arguments for function: RAND=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)', '452354.00000000000000000000=SUMXMY2(45245)', '65534!A1']","" ' Doc3,BQ7,"['*STACKERROR* not enough arguments for function: RAND=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000000000000000000=SUMXMY2(45245))=FACT(59)=RAND(452354.00000 ... (truncated) |
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