Cyberattack knocks out Kyivstar, Ukraine's largest mobile operator, disrupting air raid alerts
Reportedon one origin only: 0 distinct origins, 0 tied to no party.
A cyberattack disrupted mobile and internet service across Ukraine on Kyivstar's network and hit air raid alert systems in some regions. The Russian hacker group Solntsepek claimed it and said Kyivstar served Ukraine's armed forces and government; Kyivstar denied the group's claim to have destroyed thousands of servers and said subscriber data was safe. Ukraine's security service said the responsible group operated under Russia's military intelligence, and Ukraine's cyber agency linked Solntsepek to the GRU-run Sandworm group. It was among the most disruptive cyberattacks of the war.
- When
- 12 December 2023
- Where
- Ukraine, Ukraine
- What
- cyber
- Acting party
- Government of Russia
- Attribution
- Attributed by independent sources. Solntsepek claimed it; Ukraine's SBU attributed the group to Russia's GRU; no Russian government acknowledgment.
- In the record
- Published 2026-10-27 21:03 UTC · revision 1 · monthly summary
Sources
- Origin of the claim Kyiv Independent
History
| When | Field | From | To | Why |
|---|---|---|---|---|
| 2026-10-27 21:03 UTC | status | null | reported | P1 monthly summary: researched from cited sources and graded by the one rule |
Cite or reuse
The War Record, "Cyberattack knocks out Kyivstar, Ukraine's largest mobile operator, disrupting air raid alerts", ev-20261027-w5wq, revision 1, https://thewarrecord.com/events/ev-20261027-w5wq/