DisclosureLens
GLOBALMalwareConstructionConstructionRansomwareSarcomaRansom DemandedActor NamedMedium

Söllner

bd_76faa5d2e5114ebd · schema v1 · pii pii-v1

Severity

Medium

Discovered

Filed

Nov 20, 2025

To disclose

Affected

Not disclosed

Confidence

50%
Full breach record for Söllner

Threat-actor claim — not a regulatory filing

This row is a claim by the ransomware group Sarcoma 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: ConstructionDiscovered: 2025-11-20

Source: Ransomware.live

Post text · scraped from the leak site

Söllner Söllner GmbH & Co. KG is a family-owned roofing company based in Plettenberg, operating for four generations since 1902. The company specializes in roofing, carpentry, facade construction, scaffolding, and offers additional services such as container service and crane rentals. Recently, they have expanded into architecture, providing comprehensive services from design to execution. With a team of qualified professionals, Söllner serves both regional and national clients in the industrial, commercial, public, and private sectorsGeo: Germany - Leak size: 286 GB Archive - Contains: Files, SQL

Incident timeline — mostly unverified

? — ?

Breach window unknown

Nov 20, 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.

About this groupFirst seen 2024-07-09

sarcoma

According to ransomware.live, Sarcoma is a ransomware group that debuted in October 2024, immediately ranking among the top three most active groups globally and surpassing 116 documented victims by mid-2025, targeting mid-market companies across manufacturing, retail, healthcare, legal, and business services with roughly 50% of victims in the United States.

141 victims claimed globally141 tracked hereFull profile →