Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: Country82000 uses a CLASSIC double-extension scheme in which every encrypted file has “.country82000” appended directly after the original file extension, for example: • Report_2024.pdf.country82000 • Vacation.jpg.country82000 Renaming Convention: – Files keep their full original name + original extension (e.g., .docx, .xlsx, .db, etc.).…

Technical Breakdown: Ransomware Family – “Coty” 1. File Extension & Renaming Patterns Confirmation of File Extension: The Coty strain appends .coty to every encrypted file (example: budget.xlsx → budget.xlsx.coty). Renaming Convention: Files are first encrypted, then renamed in-place. No special prefixes, middle-infixes, directory-level labels, or dual-extension tricks are used—only the single .coty suffix appears. 2.…

cosw Ransomware Intelligence Brief Comprehensive Resource for Victims & Defenders Technical Breakdown 1. File Extension & Renaming Patterns File extension added: .cosw (lower-case) Renaming convention: Original filename → [original_name][random 6–8 lower-case hex].cosw Example: Report-2024.xlsx becomes Report-2024.xlsx.b4ad7e2f.cosw – No change to the rest of the file name structure; only the suffix is mutated. – Directories are…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: The ransomware appends the exact extension “.cossy” to every file it encrypts. Renaming Convention: Original filenames remain intact, followed by a single dot and “cossy”. Example: Annual_Report_2024.xlsx.cossy. 2. Detection & Outbreak Timeline Approximate Start Date/Period: First reliable public submissions to malware repositories appeared…

Technical Breakdown: cosd Ransomware (STOP/Djvu Family) 1. File Extension & Renaming Patterns Exact Extension in Use: .cosd (zero-padded postfix immediately appended to the original filename) Renaming Convention Original file: ProjectProposal_Q3.docx After encryption: ProjectProposal_Q3.docx.cosd Original extension and base filename remain intact; .cosd is simply tacked on. Files with identical names in different folders remain unduplicated; only…

COSAKOS – Comprehensive Community Resource (Last updated ‑ 2024-05-29) This document is intended for incident-response responders, MSSPs/help-desk teams, and any public user who suddenly sees their data suffixed with “.cosakos”. All recommendations build on real-world triage workflows used in > 15 recent COSAKOS intrusions analysed by independent IR firms and national CERTs. Technical Breakdown 1.…

Ransomware Deep-Dive: The “.CORRUPTED” Strain Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .corrupted(lower-case, appended to the original extension soinvoice.pdfbecomesinvoice.pdf.corrupted`). Renaming Convention: The sample analyzed today preserves the original file name completely and merely appends the new extension. In rare server-side variants, the malware prepends the current timestamp and the infected…

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