⚠️ ATOMSILOR Ransomware – Full Technical & Recovery Handbook Published for the infosec community – v1.7 – last update: 2024-03-12 Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .atomsilor (lower-case, ASCII; never .ATOMSILOR or .Atomsilor) Renaming Convention: First it prepends an 8-byte hexadecimal victim-ID in upper-case: AB12CD34_document.xlsx → AB12CD34_document.xlsx.atomsilor The original…

Below is a research-grade dossier on the Atomsilo ransomware (extension: .atomsilo and occasionally .atoms1lo for early variants). Use it as both a threat-modeling reference and an actionable incident-response playbook. Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .atomsilo A small subset of victims report the secondary extension .atoms1lo, indicating incremental payloads…

Ransomware Resource Sheet Variant: Atomic Technical Breakdown 1. File Extension & Renaming Patterns Registered File Extension: .atomic (sometimes .LOCKED when the affiliate packer is mis-configured, but > 90 % of samples append .atomic). Renaming Convention: Original file name is preserved, e.g. Quarterly_Report.xlsx becomes Quarterly_Report.xlsx.atomic. Drives are processed alphabetically – every mounted volume is affected, including…

# ATOM RANSOMWARE – COMMUNITY RESOURCE Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .atom (lower-case, always appended after the last dot). Renaming Convention: Original name: Budget_Q2.xlsx After encryption: Budget_Q2.xlsx.atom Nested folders retain their original structure but every file inside is suffixed with .atom. No e-mail address, campaign ID prefix, or…

Atlas Ransomware – Comprehensive Community Technical Brief & Recovery Playbook Technical Breakdown: 1. File Extension & Renaming Patterns File Extension: .atlas (This is appended to the file after the original file extension; examples: report_x.xlsx.atlas, archive.rar.atlas). Atlas does not modify the base file names. Common Renaming Convention: <original_name>.<original_extension>.atlas – keeps all characters before the final dot…

Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: Athena865 appends “.athena865” to every encrypted file name. Renaming Convention: Original filename: Q4_Financial_Report.xlsx After encryption: Q4_Financial_Report.xlsx.athena865 No email addresses or random strings are inserted—simply a single static suffix. 2. Detection & Outbreak Timeline Approximate Start Date/Period: First samples submitted to public sandboxes on…

===================================================================== RANSOMWARE PROFILE: FILE-EXTENSION “.atchbo” ## 1. Technical Breakdown File Extension & Renaming Patterns • Exact file extension appended: .atchbo (always lower-case, four characters, no dot in the added suffix—e.g., invoice.pdf becomes invoice.pdf.atchbo). • Renaming convention: The original file name and first extension are kept intact; only the extra .atchbo suffix is appended. No ransom…

Technical Breakdown: ATAware Ransomware 1. File Extension & Renaming Patterns Confirmation of File Extension: The ATAware ransomware appends the extension .ataware to every encrypted file. Renaming Convention: Encrypted files follow the pattern: <original_filename>.<original_extension>.ataware Example: Quarterly_Reports.xlsx becomes Quarterly_Reports.xlsx.ataware. 2. Detection & Outbreak Timeline Approximate Start Date/Period: – First public sightings were reported late-May 2023. – The…

ASUS (a.k.a. “AsusLocker”) – Comprehensive Defense & Recovery Guide Technical Breakdown 1. File Extension & Renaming Patterns Confirmation of File Extension: .asus Renaming Convention: – Appends “.asus” to every successfully-encrypted file after the original extension. – Leaves filenames and folder structure intact. Example: Quarterly_Financials.xlsx → Quarterly_Financials.xlsx.asus 2. Detection & Outbreak Timeline | Milestone | Date/Period…

Asulo Ransomware Intelligence Sheet File extension: “.asulo” Technical Breakdown | Section | Details | |———|———| | 1. File Extension & Renaming Patterns | – Extension appended: .asulo (lower-case).– Renaming convention: [original_name][original_extension].id-XXXXXXX.[attacker_mail].asulo ‑ the id segment is a unique identifier for the victim, often 8 bytes in hex. | | 2. Detection & Outbreak Timeline |…