DisclosureLens
GLOBALMalwareManufacturingManufacturingRansomwareCl0pRansom DemandedActor NamedData Leak ThreatenedData PublishedHigh

Sumitomo Chemical Co. Limited

bd_56b2735f079984b0 · schema v1 · pii pii-v1

Severity

High

Discovered

—

Filed

Nov 21, 2025

To disclose

—

Affected

Not disclosed

Confidence

50%
Full breach record for Sumitomo Chemical Co. Limited →

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Cl0p 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: ManufacturingDiscovered: 2025-11-21
View aggregator listing on ransomware.live

Source: Ransomware.live

Post text · scraped from the leak site

Sumitomo Chemical Co. Limited is a Japan-based company involved in the petrochemicals, energy, and functional materials sectors. It also deals with construction materials, pharmaceuticals, and agricultural chemicals. Sumitomo Chemical offers a wide range of products and services from raw materials to processed products in each of these areas. Its mission includes resolving societal issues through business activities, implementing sustainable practices, and nurturing a vibrant corporate culture.

Incident timeline — mostly unverified

? — ?

Breach window unknown

Nov 21, 2025

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.