Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: CryptoWall 4.0 does not add a brand-new extension like many contemporary strains; instead it produces enciphered files whose names remain unchanged at the byte level, but the inside of every file is unreadable. Observers sometimes see a “.CRYPT” or appended numeric string (*.id-<8-hex>.crypt)…

==================================================================== Ransomware Intelligence Brief: CryptoWall 3.0 (a.k.a. HELPDECRYPT, DECRYPTINSTRUCTION, RANSOM_NOTE) 1. File Extension & Renaming Patterns Primary file suffix appended: .abcd (Additional—but less common—variants observed: .aaa, .vvv, .micro, and ZIP-like .encrypted, though these belong to CryptoWall 4.0+ branches.) Renaming convention: Files are not merely renamed; they are cryptographically encrypted with AES-256 and the extension is…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: CryptoWall 2.0 does NOT append a new file extension to the encrypted files. Instead, it simply leaves the original file names intact, which can confuse early responders who expect a visible signature like .locky or .odin. Renaming Convention: Files remain with their original…

Technical Breakdown: CryptoWall 1. File Extension & Renaming Patterns Confirmation of File Extension: Files encrypted by CryptoWall are given the extension .encrypted or more commonly no new extension is appended—the original file simply becomes unreadable. Historically, CryptoWall showcased versions that added DECRYPT_INSTRUCTION.txt (and similar) to each folder, but the encrypted files themselves retained their original…

══════════════════════════════════════════════════════ RANSOMWARE DOSSIER – CRYPTOVIKI ══════════════════════════════════════════════════════ CRYPTOVIKI is the internal label coined by victims for this particular strain. Your tools will see the extension “.cryptoviki”, not the word itself, appended to every encrypted file. ## TECHNICAL BREAKDOWN 1. File Extension & Renaming Patterns • Confirmed extension: .cryptoviki • Renaming convention:   …cryptoviki   Example: Quarterly_Budget.xlsx.a7b4c2d9.cryptoviki • Registry…

Technical Breakdown – Ransomware “CryptoTorLocker2015!” 1. File Extension & Renaming Patterns Confirmation of File Extension: cryptotorlocker2015! (exclamation mark included). – The extension is not real; the malware simply changes the desktop and lock-screen wallpaper to display the string “cryptotorlocker2015!”. Renaming Convention: Encrypted files keep their original names but lose their icons. Internally the AES-256 encryption…

CryptotorLocker* Ransomware Resource Section 1 – Technical Breakdown 1. File Extension & Renaming Patterns Confirmed extension: .cryptotorlocker (lowercase, 15 chars) – observed variants append the extension after the original filename, e.g. Project_Q3_budget.xlsx → Project_Q3_budget.xlsx.cryptotorlocker Renaming Convention: file name remains intact; only the extension is appended. In mixed-platform infections the dot . between the original name…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: All encrypted files receive the extra suffix .cryptotorlocker. Example: Invoice_2024_Q1.xls ➜ Invoice_2024_Q1.xls.cryptotorlocker. Renaming Convention: – Original filename, complete path, and inode are preserved. – The extension is appended (not inserted), so existing extensions remain visible. – A high-entropy random 6-byte hex block is…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: CryptoShocker appends .cryptoshocker in lower-case (for example: Report_Q3.xlsx.cryptoshocker). Renaming Convention: Files are renamed after encryption has finished. The malware preserves the original base name and all original sub-folder directory structures; only the last extension segment is inserted. No random prefixes or victim-ID strings…

CRYPTOSHIELD RANSOMWARE – Comprehensive Community Resource Prepared by: Ransomware Incident Response Team (v1.2 – 15 July 2024) TECHNICAL BREAKDOWN 1. File Extension & Renaming Patterns • Confirmation of File Extension: Files receive the double extension [[email protected]].cryptoshield (e.g., Budget2024.xlsx.[[email protected]].cryptoshield). • Renaming Convention: OriginalName.ext.[[victim-id]]@[crooked-mail.pop].cryptoshield victim-id = 8 hex digits uniquely generated from machine SID Always…