DisclosureLens
GLOBALMalwareGovernmentGovernmentRansomwareInterlockRansom DemandedActor NamedData Leak ThreatenedData PublishedHigh

City of Fort Smith Arkansas

bd_00e0deacca653f7e · schema v1 · pii pii-v2

Severity

High

Discovered

Filed

Sep 15, 2026

To disclose

Affected

Not disclosed

Confidence

50%
Full breach record for City of Fort Smith Arkansas

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Interlock on its public extortion blog. It has not been validated by the victim or any regulator. Treat attribution and counts as the threat actor's assertion until a regulatory filing or victim disclosure corroborates them.

Group activity: Government & DefenseDiscovered: 2026-09-15

Source: Ransomware.live

Post text · scraped from the leak site

The City of Fort Smith is committed to providing high-quality, resident-focused services to foster a thriving community. This is how they try to position themselves, but in reality, they are very negligent towards their residents and organizations within the city due to their negligent attitude towards security and lack of desire to solve problems, were compromised resulting in a major leak of confidential data over 5.6 TB of data, which includes key infrastructure facilities of Fort Smith (Public Safety System: Police Station, Fire Department, Communications Center (responsible for the 911 emergency dispatch service), Water System: including numerous water and sewer treatment plants, Information Systems: computer systems and networks that support the operation of various departments of the city). As a result of a major leak of the city, you are provided with databases and documents of all their structures (Police and Crime Information: The Arkansas Crime Information Center and the FBI Criminal Justice Information Service system are available information on license plates and driver's licenses, Confidential law enforcement data, such as personally identifiable information (PII), such as Names, addresses, and phone numbers of residents.) More than 100,000 SSNs, reports and police station files with photos from the reports, as well as software used by cyberpolice to work with phone data, as well as reports and dumps of people's phones, and most importantly, their data on the water supply system and a complete database of 911 calls and incidents.

Incident timeline — mostly unverified

? — ?

Breach window unknown

Sep 15, 2026

Claim posted

No filing yet · watching

Compliance clocks stay unassessable until a regulatory filing lands. Dashed segments fill in automatically when corroboration arrives.

Claim → filing

Compliance clock

Not assessable

Tracked as a single-filing incident — the only disclosure on record for this event so far.Unverified claimView incident

Evidence ladder

Leak-site claimThis record

Attacker assertion only. Establishes: claim date, group, alleged victim.

Press / market report

Unlocks: incident narrative, operational impact. Still no compliance clock.

State AG / regulator filing

Unlocks: discovery date, data types, affected count, compliance clock.

SEC 8-K / victim statement

Unlocks: materiality, stated response, full audit trail. Ceiling removed.

No regulatory filing corroborates this yet — it is the attacker's own assertion. Watch this entity to be notified the moment a filing corroborates or contradicts it.

Source ceiling

  • actor name
  • victim claim
  • ransom/leak status
  • discovery date
  • materiality
  • notification
  • affected count
  • confirmed data types
  • compliance clock

The ✕ fields stay blank until a regulatory filing or victim disclosure lands.

About this groupFirst seen 2023-12-01

interlock

According to ransomware.live, Interlock is a ransomware group first observed in September 2024 that targets critical infrastructure sectors including healthcare, government, education, and technology across North America and Europe using double-extortion, with 57+ claimed victims including a major US dialysis provider exposing over two million patient records.

127 tracked hereFull profile →