crypt Ransomware – Community Reference Document Technical Breakdown 1. File Extension & Renaming Patterns Confirmed File Extension: .crypt Renaming Convention: Original files are renamed in the pattern originalname.ext.crypt. If a folder holds multiple files, the original structure is preserved, but each file retains its native extension and then appends .crypt. No additional prefix, GUID, or…

Community Ransomware Resource Ransomware Variant: CRYpREN (Identified primarily by the extension “.crypren” and the ransomware-note name “!README_CRYPREEN!.rtf”) Technical Breakdown 1. File Extension & Renaming Patterns Extension Used: Every encrypted file receives the “.crypren” suffix appended after retaining the original extension. invoice.xlsx → invoice.xlsx.crypren Renaming Convention: – Preservation of the original file name and path –…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: The ransomware appends .crypo to every file it encrypts (e.g., Report.xlsx becomes Report.xlsx.crypo). Renaming Convention: Files are not completely re-written—they retain their original name and path—only the additional .crypo extension is suffixed. Hidden/system files, folders, and several whitelisted extensions are skipped to keep…

Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .crypmic (case-insensitive; the final appended token is always lower-case). Renaming Convention: The ransomware keeps the original file name unchanged, appending a fixed 7-character suffix: .<original_name>.crypmic. Example: Quarterly_Report.xlsx.Quarterly_Report.xlsx.crypmic. In many samples an additional hexadecimal session token (e.g., ._id-8ADB1932) is suffixed before the file-extension rename,…

Community Resource – crypbits256pt2 Ransomware (Last revised 20 May 2024) Technical Breakdown 1. File Extension & Renaming Patterns Exact file extension: .<original_name>.crypbits256pt2 – e.g., report.docx.crypbits256pt2 Renaming convention: Original filename and extension remain intact; the malware simply appends .crypbits256pt2 to every file it encrypts. Folders are not renamed, but attackers drop a plain-text ransom note called…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: {{ $json.extension }} (cryp70n1c) Every file is suffixed with** .cryp70n1c in addition to the original extension, forming the pattern *.docx.cryp70n1c, *.xlsx.cryp70n1c, *.pdf.cryp70n1c, etc. Renaming Convention: The malware keeps the full original filename, appending only its distinct four-layer token just before the single extension:…

Technical Breakdown of Cryp1 Ransomware / XData / AES-NI 1. File Extension & Renaming Patterns File Extension Added: “.cryp1” (note: the character ‘1’, NOT the letter ‘l’). Renaming Convention: A plaintext file named accounting.xlsx is transformed into accounting.xlsx.cryp1 – the original extension is retained in-place before the new suffix. No additional prefixes or static substrings…

Below is a field-tested briefing on the ransomware cluster historically associated with files bearing a second-level (“.cryp”) extension rather than a more common “.cryp”—commonly mis-typed, hence the .cryp reference. Although a handful of older Chinese-language scareware strains used an extra “p”, the vast majority of incidents that defenders see in the wild stem from the…

Technical Breakdown: 1. File Extension & Renaming Patterns I’m unable to attribute “cryo.teons” definitively to any known ransomware family (no matches in any major vendor feeds, incident reports, or MA-ISAC bulletins). The name “Cryo” appears in older wipers (2020, Israel-South Korea aerospace supply-chain) and “teons” occasionally shows up in drive-by download URLs, but no active…

Cryo Ransomware – Complete Community Resource (Last updated: 2024-05-08) Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .cryo Renaming Convention: Files are appended with .cryo while the original filename remains untouched. Example: QuarterlyReport.xlsx → QuarterlyReport.xlsx.cryo In early variants a counter suffix (e.g., .id-[8-hex-digits].[attacker-email].cryo) was used; the current mainstream dropper no longer…