The dkey Ransomware Resource Guide Last updated: June 2024 Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: After encryption, every file is appended with “.dkey” (lower-case, no dot before the original extension). Renaming Convention: Victims see names like: Projects_budget_2024.xlsx.dkey client_database.sql.dkey 2. Detection & Outbreak Timeline First Confirmed Samples: 13 December 2023…

STOP/DJVU Ransomware Variant Report (Extension: .djvuu) Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: The malware leaves each encrypted item with “.djvuu” appended to the original filename. Renaming Convention: A typical affected file changes from document.pdf → document.pdf.djvuu. – The preceding filename and extension remain untouched; only the new extension is…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: The Djvu ransomware family appends the exact extension “.djvu” (or one of its look-alikes such as “.djvut”, “.rejg”, “.mpal”, “.lalo”, etc.) to every encrypted file. Renaming Convention: {originalFileName}.{originalExtension}.djvut – for example Budget-2024.xlsx becomes Budget-2024.xlsx.djvut. 2. Detection & Outbreak Timeline Approximate Start Date/Period: Djvu…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: .djvus Files encrypted by this variant are consistently appended with “.djvus” (lowercase) after the original extension, e.g., report2024.xlsx → report2024.xlsx.djvus Renaming Convention: The malware does not alter the base filename or original extension; it simply adds the new “.djvus” suffix. In some cases…

===================================================================== RANSOMWARE SPOTLIGHT – DJVUR (a.k.a. STOP / Djvu family) TECHNICAL BREAKDOWN File Extension & Renaming Patterns • Confirmation: .djvur (all lower-case) • Renaming Convention: ORIGINAL_NAME.ext → ORIGINAL_NAME.ext.djvur – no prefix, no UUID, nothing else is touched; the only visible change is the double extension. Detection & Outbreak Timeline • First orphaned sample submitted to…

Title: “.djvuq” Ransomware – Technical Dissection and Response Playbook Variant: DJVU/STOP family, off-shoot #239 (extension “.djvuq”) Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: Files are appended “.djvuq” as a SECONDARY extension to the original. Example: Quarterly_Report.xlsx → Quarterly_Report.xlsx.djvuq Renaming Convention: Original filename is kept in the first portion; nothing is…

Technical Breakdown: DJVUP Ransomware (STOP/Djvu Family) 1. File Extension & Renaming Patterns Confirmation of File Extension: Encrypted files are appended “.djvup” in lower-case, producing filenames such as: invoice_2024Q2.docx → invoice_2024Q2.docx.djvup FamilyPhotos.rar → FamilyPhotos.rar.djvup Renaming Convention: The malware prepends a random 5-9 character ID (“abc12”, “nyx08”, …) to the extension only in the README.txt ransom note,…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: The STOP/DJVU family uses one of 180+ extension identifiers that all end in the generic marker “.djvu” (notice the extra “v” compared with the benign DjVu graphics format). Renaming Convention: After encryption, every affected file is renamed as follows originalname.jpg → originalname.jpg.djvu Directory…

RANSOMWARE BRIEFING – DJUVQ (STOP/DJVU lineage) Prepared by: Cyber-Defense Task Force ================================================================== TECHNICAL BREAKDOWN File Extension & Renaming Patterns • Confirmation of extension: “.djuvq” (lower-case, dot-prefixed, 5 letters). • Renaming convention: – Original filename and extension remain intact, but the ransomware appends “.djuvq” at the end. Example: companybudgetQ3.xlsx → companybudgetQ3.xlsx.djuvq – No e-mail or ID…

Technical Breakdown: djang0unchain3d Ransomware 1. File Extension & Renaming Patterns Confirmation of File Extension: Victim files receive the double extension .DJANG0#<RANDOM>@proton.me.UNCHAIN3D. – Example: 2024-Q2_Financials.xlsx becomes 2024-Q2_Financials.xlsx.DJANG0#[email protected] – The random portion is 8 hex characters loosely spoofing Django project hashes. – The final segment (UNCHAIN3D) is always capitalized, giving the malware its nickname. Renaming Convention: File…