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US and Allies Sanction Russian Bulletproof Hosting Service Providers

By TheFinanceBase Team8 min read
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On November 19, 2025, the United States, United Kingdom, and Australia announced coordinated sanctions targeting Russian bulletproof-hosting infrastructure allegedly used by ransomware groups, criminal marketplaces, malware operators, and other cybercriminals. The principal target was Media Land LLC and its sister company, ML.Cloud LLC. The action also covered Media Land personnel and companies and individuals linked to Aeza Group, which the United States had sanctioned in July.

The measures are financial, travel, and compliance restrictions—not a single server seizure or criminal conviction. Their purpose is to make it harder for alleged cybercrime enablers to receive payments, maintain infrastructure, and evade sanctions, while giving network defenders more intelligence for filtering and monitoring. The announcement was made November 19; coverage published November 20 reported the action.

What happened on November 19, 2025?

The United States, United Kingdom, and Australia coordinated action against providers described by their governments as bulletproof-hosting services. The U.S. announcement came from the Treasury Department’s Office of Foreign Assets Control (OFAC), alongside related activity involving agencies including the FBI and CISA. The U.K. announcement involved the National Crime Agency and National Cyber Security Centre.

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The governments alleged that the targeted infrastructure supported ransomware, distributed-denial-of-service attacks, phishing, malware distribution, data theft, information-stealing malware, and criminal marketplaces. The allegations concern infrastructure and services supplied to criminal actors; they do not mean that every provider personally conducted every attack or that every customer was a sanctioned party.

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The primary U.S. source is the Treasury announcement. The U.K. provided its own account in its sanctions announcement.

What is bulletproof hosting?

“Bulletproof hosting” is a descriptive industry term, not a formal technical category of hosting. It generally refers to providers that knowingly serve customers engaged in malicious or illegal activity and are unwilling—or allegedly unwilling—to respond meaningfully to abuse reports, subpoenas, court orders, or law-enforcement requests.

The infrastructure may include virtual servers, dedicated servers, IP-address leasing, transit, proxying, domain services, or reseller arrangements. Criminal operators use it to host ransomware-related systems, malware, phishing pages, command-and-control infrastructure, data-leak sites, denial-of-service tools, and illicit marketplaces.

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“Bulletproof” does not mean literally immune from disruption. It refers to perceived resilience against complaints and takedown efforts. Providers can still lose payment channels, staff, upstream connectivity, IP space, or access to jurisdictions covered by sanctions.

Who was targeted?

Media Land and ML.Cloud

Media Land LLC, headquartered in St. Petersburg, Russia, was the central target. Treasury said Media Land supplied infrastructure to criminal marketplaces and ransomware actors associated with LockBit, BlackSuit, and Play. It also linked Media Land infrastructure to multiple DDoS attacks against U.S. victim companies and critical infrastructure.

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ML.Cloud LLC, described by Treasury as Media Land’s sister company, was also designated. Treasury said threat actors used ML.Cloud infrastructure for similar criminal activity.

The U.S. release described Alexander Alexandrovich Volosovik as Media Land’s general director and said he advertised bulletproof-hosting services under the alias Yalishanda. Treasury also described Yulia Vladimirovna Pankova, Kirill Andreevich Zatolokin, and Andrei Valerevich Kozlov as connected to the network. Treasury attributed payment and coordination activities involving Zatolokin.

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The U.K. announcement listed Media Land, ML.Cloud, Volosovik, Pankova, Zatolokin, Kozlov, and Aeza Group. The relevant U.K. notices provide additional legal grounds, aliases, and restrictions:

The Aeza network

The November action also addressed Aeza Group LLC, which OFAC had designated on July 1, 2025. The earlier U.S. action identified Aeza as a bulletproof-hosting provider supporting ransomware actors, information stealers, illicit drug marketplaces, the Blacksprut marketplace, and Meduza infostealer operators. It also designated Aeza International Ltd., Aeza Logistic LLC, Cloud Solutions LLC, and four Aeza leaders. See OFAC’s July announcement.

In November, Treasury targeted:

  • Hypercore Ltd., a U.K.-registered company Treasury described as a front for Aeza;
  • Maksim Vladimirovich Makarov;
  • Ilya Vladislavovich Zakirov;
  • Smart Digital Ideas DOO, registered in Serbia; and
  • Datavice MCHJ, registered in Uzbekistan.

Treasury alleged that these people and entities helped move infrastructure, establish replacement companies, or create alternative payment arrangements intended to evade sanctions and obscure Aeza’s continuing activity. This makes the November action partly a sanctions-evasion follow-up, rather than an isolated first strike against the hosting ecosystem.

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Why are hosting providers being targeted?

Ransomware groups and other cybercriminals need infrastructure, payment channels, domains, IP space, and technical support. A provider that serves multiple criminal customers can act as a force multiplier. Targeting that provider may affect several operations at once instead of pursuing each ransomware group separately.

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The U.K. has described action against bulletproof-hosting providers as a way to disrupt hundreds or thousands of criminals at once. That is the government’s policy rationale, not a guarantee that every customer or server will be disrupted.

The U.K. also connected Aeza-related infrastructure with the Social Design Agency, a Russian disinformation organization sanctioned by the U.K. in 2024. That connection broadens the stated concern beyond ransomware to cyber-enabled and influence-related activity.

What each country’s measures mean

United States

OFAC’s designations generally block property and interests in property belonging to designated parties when that property is in the United States, enters U.S. jurisdiction, or is controlled by U.S. persons. U.S. persons are generally prohibited from dealing with blocked parties unless an authorization or other applicable exception applies. Blocked property within U.S. jurisdiction must generally be reported.

The consequences can extend to banks, payment processors, hosting companies, cloud providers, and other businesses with a U.S. nexus. A non-U.S. company is not automatically prohibited worldwide from every transaction with a designated party solely because OFAC issued a designation. The result depends on the transaction, the parties, U.S. jurisdiction, applicable sanctions rules, and potential secondary-sanctions exposure. Businesses should obtain specialized legal advice for a specific transaction.

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United Kingdom

The U.K. added Media Land, ML.Cloud, Aeza Group, and named individuals to its sanctions framework. The exact restrictions and legal grounds depend on the applicable U.K. notice and the person or entity involved. Measures can include asset freezes and travel-related restrictions.

Australia

Australia announced financial penalties and travel-related measures against Media Land-associated parties, including Volosovik, Zatolokin, Media Land, and ML.Cloud. The Australian government said the infrastructure had been used in DDoS, malware, and ransomware attacks affecting Australian organizations. The precise legal effect should be determined under Australia’s applicable sanctions framework rather than assumed to be identical to the U.S. action.

What the sanctions do—and do not—do

Potential effects

  • Restrict access to U.S.-linked financial services and payment channels.
  • Increase compliance and counterparty risk for banks, hosting providers, resellers, and processors.
  • Make infrastructure leasing, corporate restructuring, and payment migration more difficult.
  • Expose relationships among providers, front companies, personnel, and infrastructure.
  • Give defenders additional intelligence for monitoring and filtering.

Important limitations

  • Sanctions do not automatically take servers offline.
  • They do not prove that every customer or IP address connected to a provider is malicious.
  • They do not equal an arrest, indictment, criminal conviction, or infrastructure seizure.
  • Criminal operators may migrate to another provider, jurisdiction, reseller, or payment rail.
  • Sanctioned organizations may rebrand, create successor companies, move IP space, or use intermediaries.

The action is therefore one disruption layer alongside arrests, indictments, seizures, domain takedowns, cryptocurrency tracing, provider cooperation, and defensive filtering.

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What ISPs and network defenders should do

Australia’s joint bulletproof-hosting guidance recommends a practical defensive approach:

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  1. Maintain malicious-resource filters. Use validated intelligence on malicious IP addresses, networks, domains, and related indicators at appropriate network enforcement points.
  2. Keep intelligence current. Static blocklists become stale as infrastructure moves. Use regularly updated feeds and traffic analysis.
  3. Log decisions and traffic. Preserve enough information to investigate blocked, allowed, and suspicious connections.
  4. Share indicators. Exchange useful infrastructure intelligence with trusted industry and government partners.
  5. Notify customers where appropriate. ISPs can communicate risks and offer protective filtering options.
  6. Review upstream providers. Prefer providers with credible abuse-response, legal-response, security, and customer-verification practices.
  7. Use routing security. Monitor for suspicious route changes and apply internet-routing security best practices.
  8. Avoid indiscriminate blocking. Validate indicators and assess shared hosting before blocking an entire prefix, ASN, country, or provider.

What ordinary organizations should review

Organizations that are not ISPs still face supply-chain, sanctions, and threat-intelligence questions. They should:

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Why indiscriminate IP blocking can fail

A sanctioned provider’s name may not match its operational brand, ASN owner, reseller, payment processor, or current infrastructure host. Conversely, one IP address or network prefix may contain legitimate customers alongside malicious systems.

Blocking every address associated with a country, ASN, or provider can create collateral disruption while missing foreign-hosted infrastructure, proxies, compromised systems, and later migrations. Better decisions combine IP and domain intelligence with certificates, DNS history, behavioral indicators, traffic context, and repeated validation.

Can these sanctions stop ransomware?

They may increase the cost and friction of operating ransomware infrastructure, disrupt payment and hosting relationships, and improve visibility into the networks that support cybercrime. They are unlikely to eliminate ransomware on their own.

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Criminal groups can move between providers, use resellers, register successor companies, change payment arrangements, or migrate to other jurisdictions. The practical effect will depend on enforcement, cooperation from financial and infrastructure companies, intelligence sharing, and the ability of defenders to distinguish genuinely malicious resources from shared or reassigned infrastructure.

The November action should therefore be understood as part of a continuing campaign against the infrastructure layer of cybercrime. It followed the July Aeza designation and earlier allied action against other bulletproof-hosting providers, including the February 2025 Zservers action documented by the U.S. Treasury.

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Written by TheFinanceBase Team

The Team behind TheFinanceBase.

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