HackingProfessional ServicesProfessional ServicesStolen CredentialsCapture Stored DataData ExfiltratedCustomer Data InvolvedDelayed DiscoveryIdentity (basic)Government IDHighContained

CORPORATION SERVICE COMPANY

bd_0b9793f68588a624 · schema v1 · pii pii-v1

Severity

High

Discovered

Apr 5, 2018

Filed

May 17, 2018

To disclose

6 weeks

Affected · nationwide

4,6314,243 in this filing

Linked

7 filings

Confidence

71%

Full breach record for CORPORATION SERVICE COMPANY →2 incidents on file

Corporation Service Company (CSC) notified Washington AG of a cyberattack where an unauthorized third party accessed its network and exfiltrated a database table containing names and Social Security numbers. The breach occurred on November 25, 2017, was discovered on April 5, 2018, and affected approximately 4,243 Washington residents. CSC engaged forensic firms, notified law enforcement, and offered 12 months of credit monitoring.

J jump to incidentP pin to compareR raw source

Incident timeline

undetected · 131 days

discovery → filing · 6 weeks / 42 days

Nov 25, 2017

Begins

Apr 5, 2018

Discovered

May 17, 2018

Filed

vs. sector median

13 wks faster

This filing is one of 7 about the same incident.View merged incident

Linked disclosures

Why this link?

Regulatory filings (6) · sorted by filing gap

New Hampshire State AGbd_1faa68133b09a3332018-05-17Verified
California State AGbd_3f435c5b8cf604192018-05-17Verified
Massachusetts State AGbd_9e3380d929b63acd2018-05-17Verified
Oregon State AGbd_bc65e9cd2ef121b42018-05-17Verified

Show 2 more filings ↓up to 25d gap

Montana State AGbd_0179841f383577542018-06-11 · +25dVerified
New Hampshire State AGbd_30e939b480112b382018-06-11 · +25dVerified

Name: Mullen Coughlin LLC
norm: mullen coughlin

Name: CORPORATION SERVICE COMPANY
norm: corporation service
Industry: Professional Servicesllm

Discovered: Apr 5, 2018
Breach occurred: Nov 25, 2017
Undetected for: 131 daysoccurrence → discovery
Materiality determined: —
Notification sent: May 17, 2018
Affected individuals: 4,631state + nationwide
Data types: Identity (basic)Government ID
Data elements: Social Security numberName
WA-stated cause: Cyberattack
WA-stated duration: lifecycle 100-199dexposure 0d
WA-stated discovery: Found after the fact
Attack vector: Unauthorized Access
MITRE ATT&CK: T1078 Valid AccountsT1041 Exfiltration Over C2 Channel
Threat actor: ExternalFinancial
Regulator citations: Notified state regulators
Initial access: valid_credentials

During the incident: Took immediate steps to stop the activity
Informed law enforcement
Engaged two leading, independent cyber security firms
Notified impacted customers
Initiated incident response and mitigation activities
Offering 12 months of free credit monitoring and identity restoration services
Changes made: Requiring two-factor authentication on certain customer facing applications and internal administration logins
Expanding web application and other firewalls
Mandating 16-character employee passwords
Continuing to monitor all systems for unusual activity
Source: Quoted from the filing itself, not independently verified.

Time to disclose: 6 weeks(42 days from discovery to filing)
Compliance flags: — (clock not assessable for this source)

Status: No extraction artifact recorded for this disclosure.

Filing propagation · 7 filings · 6 states

View merged incident ↗

New Hampshire State AGMay 17 · first

California State AGMay 17 · first

Massachusetts State AGMay 17 · first

Oregon State AGMay 17 · first

Washington State AGMay 17 · first · this page

Montana State AG+25d

New Hampshire State AG+25d

Pattern: first filing May 17 (NH), last Jun 11 (NH) — a 25-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://agportal-s3bucket.s3.amazonaws.com/databreach/BreachM9573.pdf
DisclosureLens links to the originating regulator URL — full filing bodies are not redistributed from public surfaces (§4.5).
Filed at: May 17, 2018
Raw hash: 00ff80fe771482691bb94f6516d955cea39388d8a07f2f3d3f1e082ef66a325c

Linked disclosures

Regulatory filings (6) · sorted by filing gap

Reporting entityMullen Coughlin LLC

Victim entityCORPORATION SERVICE COMPANY

Incidentdiscovered Apr 5, 2018

Stated responseTook immediate steps to stop the activity

Complianceclock not assessable

Extraction provenanceno artifact recorded

Source provenanceagportal-s3bucket.s3.amazonaws.com