BKC Ransomware – Community Defense Brief Technical Breakdown 1. File Extension & Renaming Patterns Confirmed File Extension: .bkc (added after the original extension, not replacing it) Renaming Convention: <original-filename>.<ext>.id-<8-hex-chars-from-computer-name>.[<[email protected]>].bkc Example: Report_2024.xlsx.id-4F1A2B3C.[[email protected]].bkc 2. Detection & Outbreak Timeline First Public Samples: 30-Jun-2023 observed on VirusTotal & the MalwareHunterTeam feeds Main Campaign Ramp-Up: July-August 2023; larger mailing-wave in…

Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: bk666 appends exactly “.bk666” to every encrypted file (e.g., Q4_Report.xlsx.bk666, CustomerDB.sql.bk666). Renaming Convention: Unlike some families that prepend e-mail addresses or random IDs, the ransomware simply maintains the original filename plus the new extension. No random hexadecimal or GUID strings are inserted beforehand.…

BK (a.k.a. RansomWare 2.0) has been circulating in underground forums since late-2023. Below you will find everything we presently know about its TTPs (tactics, techniques, and procedures) and, more importantly, the concrete steps you can take to keep it out of your environment – or to recover if it has already planted itself. Technical Breakdown…

==================================================== RANSOMWARE FEATURE SHEET – “BJRTZIWSGW” Extension: .bjrtziwsgw Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .bjrtziwsgw (lower-case, appended once). Renaming Convention: Original → <filename>.<original_extension>.bjrtziwsgw Example: Q4-Forecast.xlsx becomes Q4-Forecast.xlsx.bjrtziwsgw Folders also receive a text file: __$RECOVERY_README$.txt in every affected directory. 2. Detection & Outbreak Timeline First Public Submission on Any.Run: 13…

Technical Breakdown: File Extension & Renaming Patterns • Confirmation of File Extension: .bizer • Renaming Convention: – Appends “.bizer” to EVERY file it encrypts (e.g., Payroll.xlsx → Payroll.xlsx.bizer). – Leaves directory names untouched; does not prepend random IDs or use double-extensions beyond “.bizer”. – Drops a single ransom note “Restore-My-Files.txt” into every folder and on…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: .biz All encrypted files on the victim system have the suffix .biz appended to their original name. Renaming Convention: original_name.ext.id-< Victim-ID >.[[email protected]].biz Breaking this down: original_name.ext – keeps the original file name and extension for readability id-< Victim-ID > – a unique 8-digit…

BIXI Ransomware — Community Recovery Guide Technical Breakdown 1. File Extension & Renaming Patterns Exact Extension Used： .bixi Renaming Convention： Victims will notice that every encrypted file keeps its original name and directory location, but is suffixed only with the four-character extension .bixi (e.g., Quarterly_Sales.xlsx → Quarterly_Sales.xlsx.bixi). No email address, victim-ID strings, or random characters…

Threat Dossier – BITX Ransomware Comprehensive community resource | Last updated: 2024-06 Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .bitx (always lowercase, no additional sub-extensions). Renaming Convention: Each encrypted file is renamed in the pattern: <original_filename>.<original_extension>.Email=[<contact1>@onionmail.org]ID=<8_hex_UID>.bitx Example: Budget_Q3_2024.xlsx.Email=[[email protected]]ID=A71CF3E9.bitx 2. Detection & Outbreak Timeline Approximate Start Date/Period: First public submissions to…

bitstak Ransomware Comprehensive Resource Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .bitstak Renaming Convention: Files are renamed using the pattern OriginalName.FileExtension.bitstak Example: Annual_Report.xlsx becomes Annual_Report.xlsx.bitstak (The malware preserves the original extension before appending .bitstak, which visually keeps the file type recognizable but marks it as encrypted.) 2. Detection & Outbreak…

Ransomware Brief: BITSHIFTER (.bitshifter) Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: Encrypted files always receive the exact extension .bitshifter in lower-case. Renaming Convention: • Original filename (sales_report_Q2.xlsx) is overwritten rather than appended. • The encrypted file becomes simply sales_report_Q2.xlsx.bitshifter (no UUID or e-mail). • Files that were locked/invalid at the…