Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: .blind2 and (in second-wave campaigns) .blind2rev are appended to every encrypted file – e.g., report.xlsx becomes report.xlsx.blind2. Renaming Convention: The malware prepends no e-mail address or victim ID, but it leaks the base64-encoded computer SID and a 5-digit campaign number inside the new…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: The ransomware now called Blind appends “.blind” to every encrypted file. Example: QuarterlyReport.xlsx becomes QuarterlyReport.xlsx.blind. Renaming Convention: – Files are encrypted in-place; the original filename remains entirely unchanged except for the single appended suffix. – No e-mail address, user ID, or hexadecimal token…

Ransomware Threat Brief – BLEND Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .blend (not to be confused with Blender video/3-D files). Renaming Convention: • Original filename kept intact. • A time-stamp suffix __YYYYMMDD_HHMMSS__, followed by the fixed extension .blend, is appended. Example: 2024_proforma.xlsx becomes 2024_proforma.xlsx__20240317_153024__.blend 2. Detection & Outbreak Timeline…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: bleepyourfiles appends the exact six-byte suffix .bloop to every encrypted file. Renaming Convention: The ransomware keeps the original filename and full directory path intact, only adding .bloop at the end. Example: Annual_Report.xlsx → Annual_Report.xlsx.bloop. No base-64 or victim-ID portions appear in the name…

=== Technical Breakdown – “Bleep” Ransomware 1. File Extension & Renaming Patterns Confirmation of File Extension: Bleep appends the literal string .bleep (lowercase, no dot before the original extension) to every encrypted file. Renaming Convention: Original file: QuarterlyReport.xlsx After encryption: QuarterlyReport.xlsx.bleep 2. Detection & Outbreak Timeline Approximate Start Date/Period: First telemetry sighting in the wild…

Ransomware Profile: BLAZE (extension .blaze) Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: [[filename]].blaze All encrypted files receive a single, six-letter suffix that is always lowercase. Renaming Convention: – Original file name is fully preserved; the three-letter extension is appended immediately after the final dot (e.g., Project.docx → Project.docx.blaze). – Folder-level…

Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: The Blastoise ransomware appends the triple-character string .blastoise to every encrypted file. Renaming Convention: Original file → document.docx.blastoise The ransomware does not change the base filename or add random prefixes/suffixes; it simply concatenates .blastoise to the existing extension, making the presence of the…

BLASSA RANSOMWARE – Community Resource Compiled by the Cyber-Incident Response Team (ISC-CIRT) – v1.0, June 2025 1. TECHNICAL BREAKDOWN 1.1 File Extension & Renaming Patterns • Confirmed extension: .blassa (lowercase) is appended to every encrypted file. • Renaming convention: Original name, extension, and remaining path are left intact, then .blassa is appended. Example: 2025_Q2_Budget.xlsx →…

Technical error: the placeholder {{ $json.extension }} evaluated to the literal string “blank”. “Blank” is not a known ransomware extension, so there is no credible forensic data about a family that stores *.blank encrypted files. Below you will find (1) concise instructions for confirming the real extension in case the placeholder simply collapsed, and (2)…

Technical Breakdown – BlackZluk Ransomware (.blackzluk) 1. File Extension & Renaming Patterns Confirmation of File Extension: All encrypted objects receive the suffix “.blackzluk” (lower-case, no preceding space or delimiter). Renaming Convention: ..blackzluk Example: Project_2024.xlsx.blackzluk or Customer_DB.accdb.blackzluk. In some variants a campaign-specific ID (4-8 hex digits) is appended right after the original extension, resulting in: Monthly_Report.pdf.{3F8AC2A7}.blackzluk.…