StormDev, a game-related ecosystem platform, suffered a massive data breach exposing 183 million unique email addresses alongside associated passwords, usernames, and site access logs. The breach was facilitated by stealer-log malware (e.g., RedLine, Raccoon), which harvested credentials from infected machines via Telegram channels, dark web forums, and social platforms. The leaked dataset, compiled by threat intelligence firm Synthient, included 3.5TB of raw data (23 billion rows), with 92% being previously known but still yielding 183M new unique records and 16.4M unseen credentials. The exposed data enables automated credential stuffing attacks, where attackers exploit reused passwords across multiple services. While the breach primarily involved email-password pairs, the scale increases risks of account takeovers, phishing, and session hijacking especially for users reusing credentials on high-value platforms (e.g., banking, cloud storage). StormDev’s breach underscores the systemic vulnerability of password reuse and the proliferation of infostealer malware as a low-cost attack vector. No direct financial or operational disruption to StormDev was reported, but the secondary risks to end-users (identity theft, fraud) remain severe.
Source: https://www.findarticles.com/have-i-been-pwned-adds-183m-leaked-logins/
TPRM report: https://www.rankiteo.com/company/stormdev
"id": "sto5595555102725",
"linkid": "stormdev",
"type": "Breach",
"date": "10/2025",
"severity": "50",
"impact": "2",
"explanation": "Attack limited on finance or reputation"{'affected_entities': [{'customers_affected': '183 million unique email '
'addresses',
'industry': 'Gaming/Technology',
'name': 'StormDev',
'type': 'Game-Related Ecosystem Platform'},
{'customers_affected': '3.9 million records (emails, '
'usernames, profile photos)',
'industry': 'Social Media/Entertainment',
'name': 'MyVidster',
'type': 'Defunct Video-Sharing Site'}],
'attack_vector': ['Stealer-Log Malware (RedLine, Raccoon, Lumma)',
'Telegram/Dark Web Forums',
'Automated Credential Stuffing'],
'customer_advisories': ['Check HIBP for exposed emails/passwords.',
'Rotate compromised credentials and enable MFA.',
'Beware of phishing scams referencing '
'StormDev/MyVidster breaches.'],
'data_breach': {'data_exfiltration': True,
'number_of_records_exposed': '186.9 million (183M StormDev + '
'3.9M MyVidster)',
'personally_identifiable_information': ['Email Addresses',
'Usernames'],
'sensitivity_of_data': ['Medium to High (credentials enable '
'account takeovers)',
'Low (profile photos)'],
'type_of_data_compromised': ['Email Addresses',
'Passwords',
'Usernames',
'Profile Photos',
'Autofill Data',
'Browser Cookies',
'Session Tokens']},
'description': 'Cybersecurity researcher Troy Hunt uploaded a massive batch '
'of compromised account data to Have I Been Pwned (HIBP), '
"including 183 million accounts from the 'game-related "
"ecosystem' platform StormDev and 3.9 million from the defunct "
'video-sharing site MyVidster. The data was sourced from '
'stealer-log malware (e.g., RedLine, Raccoon, Lumma) collected '
'by threat intelligence company Synthient, which scraped 3.5TB '
'of credentials, cookies, and autofill data from Telegram '
'channels, forums, and dark web platforms. The breach '
'highlights the risks of credential stuffing, password reuse, '
'and automated attacks leveraging stolen logs. HIBP now hosts '
'the data for public breach notifications, urging users to '
'check exposures, rotate passwords, enable multi-factor '
'authentication (MFA), and adopt passkeys.',
'impact': {'brand_reputation_impact': ['Potential reputational damage for '
'StormDev/MyVidster',
'User distrust in platform security'],
'data_compromised': ['Email Addresses',
'Passwords',
'Usernames',
'Profile Photos (MyVidster)',
'Autofill Data',
'Browser Cookies'],
'identity_theft_risk': ['High (due to credential reuse across '
'services)',
'Session Hijacking via Stolen Cookies']},
'initial_access_broker': {'data_sold_on_dark_web': ['3.5TB of stealer logs '
'(23B rows, 92% '
'duplicate)',
'183M unique StormDev '
'records',
'16.4M previously unseen '
'credentials'],
'entry_point': ['Infostealer Malware Infections '
'(RedLine, Raccoon, Lumma)',
'Dark Web/Telegram Log Trades'],
'high_value_targets': ['Email Accounts',
'Banking/Cloud Services (via '
'credential reuse)']},
'investigation_status': 'Ongoing (HIBP validating additional credential '
'stuffing lists)',
'lessons_learned': ['Password reuse remains a critical vulnerability (94% of '
'leaked passwords are non-unique).',
'Infostealer malware (e.g., RedLine) enables low-effort, '
'high-impact credential harvesting.',
'Dark web forums/Telegram channels are primary markets '
'for trading stolen logs.',
'Credential stuffing automation amplifies breach impact '
'across unrelated services.',
'Browser-stored passwords/cookies create persistent risks '
'even after password changes.'],
'motivation': ['Financial Gain (credential stuffing, account takeovers)',
'Data Monetization (selling logs on dark web)',
'Automated Attack Scaling'],
'post_incident_analysis': {'corrective_actions': ['Global push for passkey '
'adoption to eliminate '
'reuse/phishing risks.',
'Enhanced monitoring of '
'dark web/Telegram for '
'stolen credential trades.',
'Public awareness campaigns '
'on password hygiene and '
'MFA (e.g., HIBP’s tools).',
'Browser vendors improving '
'anti-stealer protections '
'(e.g., cookie theft '
'mitigations).'],
'root_causes': ['Widespread password reuse across '
'services.',
'Lack of MFA adoption leaving '
'accounts vulnerable to stuffing.',
'Proliferation of turnkey '
'infostealer malware (low barrier '
'to entry).',
'Delayed credential rotation '
'post-breach (enabling persistent '
'session hijacking).',
'Dark web ecosystem facilitating '
'log trading/recycling.']},
'recommendations': ['Audit all accounts via Have I Been Pwned (HIBP) for '
'exposures.',
'Rotate passwords immediately, prioritizing email, '
'banking, and cloud services.',
'Use a password manager to generate and store unique, '
'long passwords for every site.',
'Enable multi-factor authentication (MFA) everywhere '
'possible, preferably with passkeys.',
'Clear browser-stored passwords and cookies; update '
'browsers/anti-malware software.',
'Check email forwarding rules and recovery settings for '
'unauthorized changes.',
'Monitor for phishing attempts leveraging breached '
'service names (e.g., fake password reset links).',
'Businesses: Enforce unique passwords, MFA, and rapid '
'credential rotation post-breach.',
'Replace passwords with passkeys where supported to '
'resist phishing and reuse.'],
'references': [{'source': 'Have I Been Pwned (HIBP)',
'url': 'https://haveibeenpwned.com'},
{'source': 'Troy Hunt’s Blog (HIBP Update Announcement)'},
{'source': 'Synthient Threat Intelligence Report'},
{'source': 'Verizon Data Breach Investigations Report '
'(Credential Stuffing Stats)',
'url': 'https://www.verizon.com/business/resources/reports/dbir/'},
{'source': 'SpyCloud Annual Report (Password Reuse '
'Statistics)'}],
'response': {'communication_strategy': ['HIBP breach search tool',
'Pwned Passwords feature',
'User guidance for exposed accounts'],
'remediation_measures': ['Public breach notification via HIBP',
'Password rotation advisories',
'MFA/passkey adoption recommendations'],
'third_party_assistance': ['Synthient (threat intelligence)',
'Have I Been Pwned (breach '
'notification)']},
'threat_actor': ['Low-Skilled Attackers (using turnkey infostealers)',
'Threat Intelligence Aggregators (Synthient)',
'Dark Web Data Traders'],
'title': 'StormDev and MyVidster Data Breach Exposed via Have I Been Pwned '
'(HIBP)',
'type': ['Data Breach', 'Credential Stuffing', 'Malware (Infostealer)'],
'vulnerability_exploited': ['Password Reuse',
'Weak/Stolen Credentials',
'Unsecured Browser-Stored Passwords/Cookies']}