Ransomware Variant Guide: cadq (Djvu / STOP lineage) Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .cadq Renaming Convention: After encryption a file named photo.jpg becomes photo.jpg.cadq. The ransomware preserves the original filename and simply appends the new extension in lower-case letters. Decrypted _readme.txt ransom notes are dropped into every affected…

Note: The string “clop” is a padded rendering of the Clop ransomware family. The content below is built on open-source threat-intelligence reporting from IBM X-Force, CISA #StopRansomware advisories, opportunistic samples submitted to VirusTotal, and lessons learned from several 2020-2023 incident-response engagements (the dark-web “CL0P^-” leak site is tangential to this document). Technical Breakdown: 1. File…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: .c8onnde – every successfully-encrypted file acquires the double extension “<original name>.<original ext>.c8onnde”. Renaming Convention: File name(s) are preserved absolutely unchanged – the ransomware only appends the new suffix. Rapid bulk enumeration keeps short file paths (< 260 chars on Windows) to avoid issues…

C77L Ransomware – Community Defense & Recovery Guide (This variant has been tracked internally as “C77L” after the four-character extension it appends.) Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: Every encrypted file receives the additional suffix “.c77l”. Example: Quarterly_Report.xlsx becomes Quarterly_Report.xlsx.c77l. Renaming Convention: The malware leaves the original filename intact…

Ransomware Resource: Fighting the C4H Strain Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: The malware always appends “.c4h” (ASCII bytes 2E 63 34 68) as a secondary extension immediately after the original extension, e.g., QuarterlyReport.xlsx.c4h. Renaming Convention: – Files keep the preceding filename so users/backup scripts can still tell what…

Ransomware Resource: .c3680868c Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: .c3680868c All encrypted files receive this final suffix upon completion of the encryption process. Renaming Convention: Original name → sample.doc → sample.doc.c3680868c The malware does not change the base filename or append a victim-ID between the original extension and the…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: .c300 – Files are appended with the literal suffix .c300 immediately after their original extension (e.g., Budget-2024.xlsx → Budget-2024.xlsx.c300). Renaming Convention: In addition to the new extension, the ransom note HOW_TO_BACK_FILES.txt and sometimes info.hta are dropped into every folder and the desktop. Volume…

Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: {{ $json.extension }} is verified as “.c1h” (lowercase, no leading dot). Renaming Convention: Each affected file is appended with the string “.c1h” directly after the original extension without removing/changing it. Example: Before: Budget_2023.xlsx After: Budget_2023.xlsx.c1h 2. Detection & Outbreak Timeline Approximate Start Date/Period:…

RANSOMWARE PROFILE: C1024 (April 2024 wave) Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: c1024 – appended verbatim without a preceding dot, e.g., Invoice_2024.pdf becomes Invoice_2024.pdfc1024. Renaming Convention: – No extra prefix/suffix is added. – Directory-level marker: A file named c1024-readme.txt is dropped in every affected folder. – No folder-name alteration.…

Community Ransomware Reference – ‘c0v’ Technical Breakdown 1. File Extension & Renaming Patterns • File-extension used: .c0v (lower-case zero). • Renaming convention: {original_name}.{original_extension}.id-{[0-9A-F]{8,10}}.[<email-pair>].c0v Examples: Project.docx.id-F274BC92A.[[email protected]].c0v 2024-Q1_P&L.xlsx.id-21E7A8D0C.[[email protected]].c0v The hexadecimal ID is generated from the machine’s GUID or volume serial; the two-listed e-mail addresses belong to the affiliate running the campaign and may change between waves. 2.…