WaltersMorgan Construction
bd_330403b8fcabcd2f · schema v1 · pii pii-v1
Full breach record for WaltersMorgan Construction →Threat-actor claim — not a regulatory filing
This row is a claim by the ransomware group Sinobi 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.
Source: Ransomware.live
Post text · scraped from the leak site
Walters-Morgan Construction, Inc. is a leading construction firm based in Manhattan, Kansas, specializing in the construction of water and wastewater treatment plants as well as other municipal utilities. Established in 1938, the company is dedicated to community success and environmental stewardship through quality engineering and construction services. They offer a wide range of career opportunities, promoting a positive work environment and benefits for employees of all skill levels. Their commitment to high-quality projects reflects their goal of ensuring community pride and satisfaction.
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Incident timeline — mostly unverified
? — ?
Breach window unknown
Aug 9, 2025
Claim posted
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Corroborated · see linked filings
This record's own dates cannot anchor compliance clocks; see the linked filings.
Claim → filing
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Compliance clock
Not assessable
Linked disclosures
Why this link?Regulatory filings (4) · sorted by filing gap
- Nebraska State AGbd_2d8fd9aca7f855372026-01-16 · +159dVerified by operator
- Indiana State AGbd_5d108a48dddec12e2026-01-16 · +159dVerified by operator
- Indiana State AGbd_79fe68e799d0a1042026-01-16 · +159dVerified by operator
- Massachusetts State AGbd_56501744978e7c852026-02-18 · +192dVerified by operator
Filing propagation · 4 filings · 3 states
View merged incident ↗Pattern: first filing Jan 16 (NE), last Feb 18 (MA) — a 33-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?
Evidence ladder
Attacker assertion only. Establishes: claim date, group, alleged victim.
Unlocks: incident narrative, operational impact. Still no compliance clock.
Unlocks: discovery date, data types, affected count, compliance clock.
Unlocks: materiality, stated response, full audit trail. Ceiling removed.
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.
sinobi
According to ransomware.live, Sinobi is a private vetted-affiliate RaaS group that emerged in mid-2025, believed to be a rebrand of the Lynx/INC ransomware lineage, claiming 176 victims by end of 2025 through double-extortion attacks primarily against mid-market US organizations via compromised SonicWall VPN credentials.