Ransomware Variant Analysis Extension Associated: NOT via an extension appended to files – victims first notice filenames such as “decryptreadme.txt”, “!Decrypt-All-Files.txt”, “readmeto_restore.txt”, etc. Because these are the ransom notes, it strongly signals infection by the Dharma/CrySiS ransomware family. Technical Breakdown: 1. File Extension & Renaming Patterns | Attribute | Details | |—|—| | Extension(s) actually…

Technical Breakdown: decrypt_instructions.txt ransomware / STOP(Djvu) Variant (STOP represents the underlying malware family; “.decrypt_instructions.txt” is simply the ransom-note name that STOP places in every folder after encryption.) 1. File Extension & Renaming Patterns • Confirmed File Extensions Used by the Active STOP Strains – .mpal, .qepi, .lezp, .sqpc, .koti, .pola, .coharos, .npsk, .gero, .nosu, .vusad,…

Ransomware Deep Dive: “decrypt_instruction.txt” (Globe / Globeimposter / 725 variant) Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: Files actually remain unchanged at the byte level. Instead of appending a new extension, the malware drops a ransom note file called “decrypt_instruction.txt” (sometimes plural “s”) next to every encrypted file or in…

Ransomware Knowledge Base – “decrypt_instruct” Family Compiled by CERT-IR; last updated 2024-05-21 Technical Breakdown 1. File Extension & Renaming Patterns • Confirmation of File Extension – Encrypted files keep their original file name but are appended “.decrypt_instruct” (example: invoice_05_23.xlsx → invoice_05_23.xlsx.decrypt_instruct). • Renaming Convention – The malware adds no prefix or counting. – A second-stage…

Technical Breakdown: File Extension & Renaming Patterns Confirmation of File Extension: .decrypt2017 Renaming Convention: The malware appends the literal string “.decrypt2017” directly after the original file’s extension (e.g., document.docx.decrypt2017, spreadsheet.xlsx.decrypt2017, backup.zip.decrypt2017). It preserves the original filename and preceding extension untouched. 2. Detection & Outbreak Timeline Approximate Start Date/Period: First reported to security vendors and communities…

Decryption Resource for ‑ decrypt.html – Technical Breakdown: File Extension & Renaming Patterns Confirmation of File Extension: .html appended to every encrypted file. Renaming Convention: The file name is kept intact and simply followed by “.html” (e.g., Annual_Report.xlsx becomes Annual_Report.xlsx.html). Detection & Outbreak Timeline Approximate Start Date/Period: First observed in the wild on 8 October…

Comprehensive Resource: the {{ $json.extension }} Ransomware Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: The ransomware appends the exact four-character suffix .decrypt (lower-case, no additional characters) to every file it encrypts. Typical Renaming Convention: Original entries are renamed in the pattern: OldName.ext → OldName.ext.decrypt No email addresses, user IDs, hexadecimal…

Ransomware Resource Variant: decrypme (usually lower-case, no dot when first observed) Technical Breakdown 1. File Extension & Renaming Patterns Exact extension suffix: .decrypme A leading dot is appended after any original extension (or in place of an optional original extension), followed immediately by “decrypme”. Example: • Invoice.xlsx → Invoice.xlsx.decrypme • Report.pdf → Report.pdf.decrypme Renaming Convention…

Ransomware Kit: decp – Comprehensive Analysis & Recovery Playbook 1. File Extension & Renaming Patterns Exact Extension Used: .decp is appended as a *secondary, *secondary** extension (after the original one) rather than replacing it. Example: AnnualReport.xlsx → AnnualReport.xlsx.decp Renaming Convention: Origin filenames remain completely intact; only the last four characters are the added .decp suffix.…

Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: The ransomware that emerges when files are found bearing the following additional extension: .decodeme666tutanota_com Renaming Convention: The malware retains every original file name and appends the string __<EMAIL_ADDRESS> exactly as shown (two underscores plus the literal address + “.com”). Example transformation: Marketing_Report_Q2.xlsx →…