Technical Breakdown – “[email protected]” ransomware (a.k.a. “Prometheus” / “AstraLocker 2.1”) 1. File Extension & Renaming Patterns Confirmed suffix: every encrypted file receives an additional extension .btchelp (double-extension pattern is common, e.g., invoice.pdf.btchelp). Renaming convention: [filename].[original-extension].btchelp. Directory names themselves are not touched, but “RESTOREFILESINFO.hta” and “RESTOREFILESINFO.txt” ransom notes are dropped in every encrypted folder. 2. Detection…

btcbtcbtc Ransomware – Comprehensive Threat & Recovery Guide Contributed by: Cybersecurity Incident Response Team (anonymous) Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: .btcbtcbtc The extension is appended after the original file extension, producing names like document.xlsx.btcbtcbtc, blueprints.dwg.btcbtcbtc. Renaming Convention: Victim’s original file name and extension are preserved in full. Each…

Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .btcamant Renaming Convention: – Original filename: Document.docx – Encrypted filename: Document.docx.btcamant Many samples append the victim identifier (a six-character hash like A1B2C3) immediately before the extension on the second infection wave, e.g. Document.docx.A1B2C3.btcamant. 2. Detection & Outbreak Timeline Approximate Start Date/Period: First telemetry…

## btc.kkk.fun.gws Ransomware – Technical & Response Guide Technical Breakdown File Extension & Renaming Patterns • Extension applied: .btc.kkk.fun.gws (literal; 18-character suffix in lower-case). • Renaming convention: Each encrypted file receives the original name, a dot, and then the 18-character string btc.kkk.fun.gws. – Example: Annual_Report.xlsx → Annual_Report.xlsx.btc.kkk.fun.gws • Note: The ransomware keeps the original extension…

btc-help-you Ransomware Resource Guide Technical Breakdown: 1. File Extension & Renaming Patterns Confirmation of File Extension: Encrypted files receive a new “.btc-help-you” extension appended to the original file name. No second extension appears (i.e., document.xlsx becomes document.xlsx.btc-help-you rather than document.btc-help-you.xlsx). Renaming Convention: – The ransomware keeps the original filename and the original extension intact. –…

Technical Breakdown: BTC-APT2 Ransomware 1. File Extension & Renaming Patterns Confirmation of File Extension: Victims observe that every encrypted file is appended with the extension “.btc-apt2”. Renaming Convention: The malware modifies the complete file name during encryption: OriginalName.ext becomes OriginalName.ext.id-[8_digit_random_ID].[attacker_email].btc-apt2 Example: report_2024.docx → [email protected] 2. Detection & Outbreak Timeline Approximate Start Date: Intra-industry sensor networks…

Expert Community Resource — Ransomware Profile: .btc-help-you Technical Breakdown 1. File Extension & Renaming Patterns Confirmed Extension: .btc-help-you (Variant sometimes seen as .btc-help-you-\_\_unique-id on some strands.) Renaming Convention: • Every encrypted file is renamed to original_filename.ext.id-[unique-ID].email-[[email protected]].btc-help-you • Unique-ID is a 6-9 character alphanumeric string derived from the victim’s machine GUID. • Folders receive a text…

Technical Breakdown: “BTC” Ransomware 1. File Extension & Renaming Patterns Confirmed File Extension: .btc The original filename survives, followed by a single dot and the lowercase letters btc. Example: 2024-Q1_Financials.xlsx → 2024-Q1_Financials.xlsx.btc Renaming Convention: No additional elements (no attacker-supplied IDs, email addresses, or base64 strings). Only the final “.btc” is appended, making it easy to…

Ransomware Focus Report Variant Identifier: .bspojzo Technical Breakdown File Extension & Renaming Patterns • Exact extension added to every encrypted file: .bspojzo • Renaming Convention: A plain append operation—original_name.extension.bspojzo—with no prefix or obfuscation. Example: Quarterly_Report.xlsx → Quarterly_Report.xlsx.bspojzo Detection & Outbreak Timeline • First widespread reporting date: 17 March 2024 (dynamic campaigns observed from 12 March…

Technical Breakdown: Ransomware Extension: .bsc (Tags encrypted files with <original_name>.id-<random_ID>.[operator_email].bsc) 1. File Extension & Renaming Patterns • Confirmation of File Extension: Encrypted files receive the suffix .bsc. • Renaming Convention: Example: Contract_Final.docx becomes Contract_Final.docx.id-7B3FA2E9.[[email protected]].bsc – id-<8-hex-chars> = unique victim identifier – [[email protected]] = attacker-supplied contact e-mail (varies by campaign) 2. Detection & Outbreak Timeline |…