MalwareTechnologyEducationInformationRansomwareRansom DemandedRansom PaidData ExfiltratedCustomer Data InvolvedMulti-Stage ChainIdentity (basic)Government IDFinancial accountMediumResolved

STRIDE, INC.

bd_f50442088aa70521 · schema v1 · pii pii-v1

Severity

Medium

Discovered

Nov 11, 2020

Filed

Dec 1, 2020

To disclose

20 days

Affected

742state residents only

Confidence

69%

Full breach record for STRIDE, INC. →2 incidents on file

Stride Inc. filed a supplemental notice with the Washington AG regarding a ransomware attack occurring Nov 4-19, 2020. The incident affected 742 Washington residents, exposing names, SSNs, passport numbers, and financial account data. Stride paid the ransom, engaged forensic investigators, and provided 12 months of credit monitoring.

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Washington clock✓ WA AG ≤30d20 days discovery → filing

⚠ AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Incident timeline

undetected · 7 days

discovery → filing · 20 days

Nov 4, 2020

Begins

Nov 11, 2020

Discovered

Dec 1, 2020

Filed

vs. sector median

8 wks faster

Tracked as a single-filing incident — the only disclosure on record for this event so far.Confirmed742 affectedView incident

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: STRIDE, INC.
norm: stride
Industry: TechnologyllmEducationllm

Discovered: Nov 11, 2020
Breach occurred: Nov 4, 2020 – Nov 19, 2020
Undetected for: 7 daysoccurrence → discovery
Materiality determined: —
Notification sent: Jun 11, 2021
Affected individuals: 742state-resident count only
Data types: Identity (basic)Government IDFinancial account
Data elements: NameSocial Security numberPassport numberDate of birth
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 1-99dexposure 1-99d
WA-stated discovery: Found while ongoing
Attack vector: Ransomware
MITRE ATT&CK: T1486 Data Encrypted for ImpactT1078 Valid Accounts
Threat actor: ExternalFinancial
Regulator citations: Notified Office of the Attorney General (Washington)

During the incident: Locked down affected systems
Notified federal law enforcement authorities
Began working with a third-party forensics team to investigate
Identified and removed all infected machines from the network
Engaged an industry-leading third-party specialist to conduct a search for the data on the Internet
Provided access to credit monitoring services for twelve (12) months through Experian
Changes made: Undertaking a top-to-bottom review of its security posture
Working with outside security experts to ensure that it is taking all appropriate steps to protect its systems
Reviewing and enhancing existing policies and procedures to reduce the likelihood of a similar future event
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 20 days(20 days from discovery to filing)
Compliance flags: WA AG ≤30d
Discovery-date grounding: AG web formThe discovery date came from the AG web-form field, which is systematically later than the detection date stated in the letter. Treat the clock as indicative.

Status: No extraction artifact recorded for this disclosure.

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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachM10364.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: Dec 1, 2020
Raw hash: 5d7a5946ab20a22aeb2892e67ae262a8ad0b3a1f6d7db3b2c232eedb28f84119

Reporting entityMullen Coughlin LLC

Victim entitySTRIDE, INC.

Incidentdiscovered Nov 11, 2020

Stated responseLocked down affected systems

ComplianceWA AG ≤30d

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com