// THREAT ACTOR

ATOMSILO_

Active

ATOMSILO is a ransomware operator tracked through its public data-leak infrastructure. The group operates under the double-extortion model that defines the modern ransomware ecosystem — file encryption combined with the threat of stolen-data publication on a public leak site — and continues to post fresh victim claims as part of an ongoing extortion campaign.

For Ransomnews editorial coverage of ATOMSILO — incident write-ups, attribution notes, and additional context — see the Threat Groups archive or run a site search.

5 Victims tracked

2 / 4 Active mirrors

2021-12-21 First listing

2026-02-24 Most recent

Victims by year

2026 1
2021 4

Leak site mirrors

4 mirrors tracked, 2 currently reachable. These are criminal-infrastructure URLs — links are deliberately not provided.

mhdehvkomeabau7gsetnsrhkfign4jgnx3wajth5yb5h6kvzbd72wlqd.onion AtomSilo snapshot · 2021-12-17 05:02
l5cjga2ksw6rxumu5l4xxn3cmahhi2irkbwg3amx6ajroyfmfgpfllid.onion AtomSilo snapshot · 2022-01-25 07:08
npmh5ahrgakbniuntyc7io4adm6ietbdbuejrfonowqtyqn24or556qd.onion Atomsilo Ransomware snapshot · 2026-08-06 21:05
npmh5ahrgakbniuntyc7io4adm6ietbdbuejrfonowqtyqn24or556qd.onion Leak List - Atomsilo snapshot · 2026-08-06 21:04

Recent victims

The 50 most recent victims claimed by ATOMSILO. Total in the index: 5.

Date listed	Victim	Description
2026-02-24	A large bank in Asia	- employee_names - email_addresses - personal_information - sql_server…
2021-12-21	Tegra Vendas
2021-12-21	Eisai Co., Ltd
2021-12-21	LIGHT CONVERSION
2021-12-21	Cristália - Indústria Farmacêutica

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Statistics on this page are computed by Ransomnews from a live leak-site monitoring feed. Numbers update every ten minutes. Operator-written victim descriptions are truncated and shown in snippet form only. Source data: RansomLook (CC BY 4.0), aggregated and adapted by Ransomnews.