MalwareProfessional ServicesProfessional ServicesRansomwareData EncryptedTargetedIdentity (basic)Government IDHealth (basic)MediumContained

Rex Signature Services, LLC

bd_c5f3a90f3d67dd75 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Apr 18, 2024

Filed

May 24, 2024

To disclose

5 weeks

Affected

1state residents only

Linked

3 filings

Confidence

65%

Full breach record for Rex Signature Services, LLC →

Rex Signature Services, LLC notified Montana residents of a cybersecurity incident where an unknown actor accessed systems between April 9-18, 2024. The breach likely involved ransomware, compromising names, SSNs, driver's licenses, and limited medical data. RSS reported to federal law enforcement and offered 24 months of credit monitoring via Experian.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 9 days

discovery → filing · 5 weeks / 36 days

Apr 9, 2024

Begins

Apr 18, 2024

Discovered

May 24, 2024

Filed

vs. sector median

13 wks faster

This filing is one of 3 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (2) · sorted by filing gap

California State AGbd_83f7e8638426c0af2024-05-24Verified
California State AGbd_c7d9c7bf466cb1132024-11-12 · +172dVerified

Name: Rex Signature Services, LLC
norm: rex signature

Name: Rex Signature Services, LLC
norm: rex signature
Industry: Professional Servicesllm

Discovered: Apr 18, 2024
Breach occurred: Apr 9, 2024 – Apr 18, 2024
Undetected for: 9 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 24, 2024
Affected individuals: 1state-resident count only
Data types: Identity (basic)Government IDHealth (basic)
Data elements: Social Security number
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: report the event to federal law enforcementnotifying state regulators as required
Initial access: valid_credentials

During the incident: Promptly took steps to secure our systems
Launched an investigation to determine the full nature and scope of the event
Report the event to federal law enforcement
Notifying state regulators as required
Offering you access to twenty-four (24) months of complimentary credit monitoring and identity restoration services through Experian
Changes made: Implemented and continue to implement technical security measures to strengthen the security of our systems
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 5 weeks(36 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 3 filings · 2 states

View merged incident ↗

California State AGMay 24 · first

Montana State AGMay 24 · first · this page

California State AG+172d

Pattern: first filing May 24 (CA), last Nov 12 (CA) — a 172-day rolling notification. Rolling spreads often mean counsel is filing as thresholds trip per state. Why this link?

Evidence ladder

Leak-site claim

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

Press / market report

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

State AG / regulator filingThis record

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

SEC 8-K / victim statement

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

Source URL: https://dojmt.gov/wp-content/uploads/OCP/Consumer-notification-letter-1428.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 24, 2024
Raw hash: 3316efa895f00a080ab9372e9dc0da4ece01b43ed30b31e5b8c01cb6eadc1282

Linked disclosures

Regulatory filings (2) · sorted by filing gap

Reporting entityRex Signature Services, LLC

Victim entityRex Signature Services, LLC

Incidentdiscovered Apr 18, 2024

Stated responsePromptly took steps to secure our systems

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenancedojmt.gov