MALICIOUS
220
Risk Score
Malware Insights
MITRE ATT&CK
T1059.005 Visual Basic
T1566.001 Spearphishing Attachment
The sample is an Excel file containing Excel 4.0 macros, specifically an Auto_Open macro. This macro is designed to execute a dangerous formula API, likely to download and execute a second-stage payload from the reconstructed URL: http://line.wracomsuXDjURLMONdTFAJCSEg vIqQvZKyGfzXkomgyvSnNSPadsOPYidHWpJcXMrBCzFpipUhgwBDuUjbMtsNpuISnBoaCYXygxjnOoztMJfBaSOZqGbOYvqUWDWckZFOPNSpvDhutKOQIhwoZHJdGLYVERqqSanPjOmEeFQKcLiSciezRfnoxWRtvciCKzfabZePWdtVUka cUtWByhVpgXlve dRRsBNpJoNeqecWolIrDJFQhiEFPmTwMszSaQvqrpufZgKlWmqtkKmRCxlHwnCMuuhUuOaoWnaeErpjCyVrQWSdgvRSclgKZ sMfaPuEFDIsmtXkjzEGxXmePwyUwBPZ. The presence of environment evasion techniques and a lure to enable macros further supports its malicious intent as a downloader.
Heuristics 5
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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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XLM Auto_Open environment-evasion close gate critical OLE_XLM_ENVIRONMENT_EVASION_CLOSEExcel 4.0 macro sheet auto-executes environment checks with GET.WORKSPACE / GET.WINDOW, then shows a fake corruption/error message and closes the workbook when the host fails those checks. This is a malware sandbox-evasion pattern, even when the later payload stage is hidden behind obfuscated defined-name flow.
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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
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) | 47108 bytes |
SHA-256: 10648af074b095da3ac84b99c8f54eee75da01d8f6559ce13498dd550828ae08 |
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Preview scriptFirst 1,000 lines of the extracted script
' 0085 11 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible - tp ' 0085 19 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - bNoLXlTkWa ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 15 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, hidden - Sheet1 ' 0085 14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible - Sheet ' 0018 29 LABEL : Cell Value, String Constant - aEGmsMUJokkjnZ len=0 ' 0018 23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d tp!DS1402 ' 0018 41 LABEL : Cell Value, String Constant - baOOoxKmGlJbnbZTliFozFBNef len=0 ' 0018 36 LABEL : Cell Value, String Constant - BCLjQtJpvPXNsnomrcVcH len=0 ' 0018 58 LABEL : Cell Value, String Constant - bfFtqkDzXsRXTfiwSUdnhLbtOhbRwGGFKunuZmlCFIz len=0 ' 0018 30 LABEL : Cell Value, String Constant - BRgCpyWRuwdwDLz len=0 ' 0018 57 LABEL : Cell Value, String Constant - ccPPqyMnImLcodaUmjGpBHDOfgCENkRuLrxRZOtppn len=0 ' 0018 49 LABEL : Cell Value, String Constant - CEvVxcNJwSIyNXGGsfGcpEkCosSGExQNjG len=0 ' 0018 63 LABEL : Cell Value, String Constant - ChqqotRYfKWWlpskJYRBilGimBxgtTTuDPrLqOgGgrlEnKtF len=0 ' 0018 43 LABEL : Cell Value, String Constant - CtqCThDqzYTvxeyEMChqqpuRYfKX len=0 ' 0018 55 LABEL : Cell Value, String Constant - DMjRtKqwQYNsoonsdWdIiUknqiHkPyujEukyJrre len=0 ' 0018 60 LABEL : Cell Value, String Constant - DqcEaZBizlpQpCvNLhDbUQbsIdQaxsWYEYdlbHQRPUrxF len=0 ' 0018 34 LABEL : Cell Value, String Constant - dYZXcNUbrTSiYaSrUyw len=0 ' 0018 57 LABEL : Cell Value, String Constant - ekgrJYfhqOJmoVbuDrXTTSWIOVmNMcSVNlPtrZOiYP len=0 ' 0018 38 LABEL : Cell Value, String Constant - EohoTgfvyCtShaKsuPrwKUp len=0 ' 0018 56 LABEL : Cell Value, String Constant - EXdlaGPQOTqwEivuLPRJixpaIKeHMaWFSrsTcoQkP len=0 ' 0018 64 LABEL : Cell Value, String Constant - fJLrLRZOtDECHelsWjiyDFwWldOvxTvzOKsHfgHQcFYEbtTtF len=0 ' 0018 23 LABEL : Cell Value, String Constant - flFNChdd len=0 ' 0018 58 LABEL : Cell Value, String Constant - flFNChddbgSLSwXJYcfXvZEnjYsiZnxggTGhDQeMdPT len=0 ' 0018 28 LABEL : Cell Value, String Constant - fnEedtjmeDgLJ len=0 ' 0018 56 LABEL : Cell Value, String Constant - fopnsQWeIVUkoqiIXPzhjEglzvesRSsCOqKoNfFfq len=0 ' 0018 25 LABEL : Cell Value, String Constant - fToeVjtccP len=0 ' 0018 28 LABEL : Cell Value, String Constant - FYEbtTtFyRBXH len=0 ' 0018 17 LABEL : Cell Value, String Constant - gD len=0 ' 0018 52 LABEL : Cell Value, String Constant - GGVZcUsIBkSVpSWkuQdQDeBybJaMQpQbVnkId len=0 ' 0018 27 LABEL : Cell Value, String Constant - gTtQdrYpcgGt len=0 ' 0018 56 LABEL : Cell Value, String Constant - GVNxfhCejxIcpdPqNMnVmZdDdoiBxUqPHDPfuQENk len=0 ' 0018 35 LABEL : Cell Value, String Constant - GXxYjdveClvCxJapwyIf len=0 ' 0018 24 LABEL : Cell Value, String Constant - heNazzbjv len=0 ' 0018 50 LABEL : Cell Value, String Constant - hMKrgBrivHpoccEMYBUzYpCpnhzwTDOUQbs len=0 ' 0018 60 LABEL : Cell Value, String Constant - hmXQYCdOeikcCeJtpdxoftEmlZMmJVkRiVZymkewtQmLR len=0 ' 0018 60 LABEL : Cell Value, String Constant - hTjnphHjOytiDtkx ... (truncated) |
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