DisclosureLens
GLOBALMalwareProfessional ServicesProfessional ServicesRansomwareSilentransomgroupRansom DemandedActor NamedMedium

COZEN O'CONNOR

bd_7d97f72f98170706 · schema v1 · pii pii-v2

Severity

Medium

Discovered

—

Filed

Sep 22, 2026

To disclose

—

Affected

Not disclosed

Confidence

50%
Full breach record for COZEN O'CONNOR →2 incidents on file

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Silentransomgroup 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: Professional ServicesDiscovered: 2026-09-22
View aggregator listing on ransomware.live

Source: Ransomware.live

Company description · AI-generated by the aggregator, not the leak post

Cozen O'Connor is an American full-service law firm headquartered in Philadelphia, Pennsylvania. Founded in 1970, it operates in the legal services industry, providing counsel across practice areas including litigation, corporate law, insurance, real estate, labor and employment, cybersecurity, and government relations. The firm serves clients across the United States and internationally, with offices throughout the U.S. and abroad.

Incident timeline — mostly unverified

? — ?

Breach window unknown

Sep 22, 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 2022-06-07

silentransomgroup

According to ransomware.live, a former Conti team

206 tracked hereFull profile →