Technical Breakdown – ctrlalt* Ransomware 1. File Extension & Renaming Patterns Confirmation of File Extension: The canonical file extension added to every encrypted file is .ctrlalt[0-9] – specifically, a period followed by the literal string “ctrlalt” and a random 8-digit numeric suffix (e.g., .ctrlalt47391205). The base filename and original extension are kept; victims will see…

Technical Breakdown File Extension & Renaming Patterns Confirmation of File Extension: .CTPL (exact capitalization and placement varies; in most samples the extension is .ctpl) Renaming Convention: the ransomware keeps the original file name in between the new components. Example: Quarterly_Report.xlsx.nr3613A6B-pv8X92.ctpl – a 10–14 character Victim-ID (nr3613A6B-pv8X92 in the example) is added before the final extension…

Technical Breakdown: ctbl2 Ransomware 1. File Extension & Renaming Patterns Confirmation of File Extension: ctbl2 (exactly that – 4 lower-case characters without leading dot). Renaming Convention: – The malware first appends ‖.ctbl2‖ to every encrypted file (e.g., annual_report.pdf → annual_report.pdf.ctbl2). – Some sub-variants concatenate the original name with a 6–8 character hash before the final…

Ransomware Expert Resource Targeted variant: “CTBL” (Crypto-trojan CTBL) Technical Breakdown 1. File Extension & Renaming Patterns • Exact extension used: .ctbl • Renaming convention: Victim file Invoice.xlsx→Invoice.xlsx.ctbl. Most strains prepend or append an additional 10–20 random–hex “id” before that; e.g. 4F8A1B2C7E–Invoice.xlsx.ctbl. Check a few samples: if the beginning of the encrypted file contains nothing but…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: The ctb2 ransomware family appends .ctb2 to every encrypted file. Renaming Convention: After encryption, files retain their original name, path, and original extension but append “.ctb2” once. Examples: • Annual_Report.xlsx.ctb2 • Photo_2024.jpg.ctb2 • DATABASE.bak.ctb2 The malware does not introduce double extensions such as…

CTB-Locker (Curve-Tor-Bitcoin Locker) – Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: CTB-Locker appends “.ctbl” (or in some later variants “.ctb2” / “.locky”) to every encrypted file. Example on Windows: budget_Q4.xlsx → budget_Q4.xlsx.ctbl Renaming Convention: The file name itself is untouched; only the extension is appended. However, files inside Network Shares…

Below is a current (May-2024) field-tested guide on CTB-FAKER ransomware—the strain that appends “.ctb-faker” to every encrypted file. Use or share it freely, but validate every link or tool in your own environment first. Technical Breakdown 1. File Extension & Renaming Patterns | Attribute | Details | |——————————–|—————————————————————————————————–| | Confirmation of extension | “.ctb-faker” (case-insensitive;…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: CSPIDER appends “.cspider” to every file it encrypts, preceded by a short numeric ID in square brackets. Example: annual-report_2023.pdf.[№113267].cspider Renaming Convention: The malware preserves the original filename + original extension, adds a space, inserts the victim-ID in brackets [№xxxxx], then appends .cspider. Folders…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: .csp (immediately appended—no non-standard double-extension tricks). Renaming Convention: Original filename → <originalname>.id-<8-hex-digits>.[<attacker_email>].csp Example: 2024_Finance.xlsx becomes 2024_Finance.xlsx.id-37f1a4d6.[[email protected]].csp 2. Detection & Outbreak Timeline Approximate Start Date/Period: First submissions to public sandboxes appeared mid-April 2024. Active campaigns ramped-up significantly after 05 May 2024. 3. Primary Attack…

Ransomware File-Extension Hot-Sheet Variant: “.CSP” Technical Breakdown 1. File Extension & Renaming Patterns Exact extension added: .csp (lower-case, no leading dot in raw ransom-note titles). Renaming model (observed): [original_filename].[original_extension].[random 8-hex].[victim-id]@email.tld.csp Example after encryption: [email protected] Earlier campaigns used only one layer (file.txt.id-<hash>.csp), but dual-tagged filenames are now standard to complicate detection rules. 2. Detection & Outbreak…