DNS Abuse Responses

DNS Abuse Responses are the various tools, methods, collaboration, and philosophies spawning from DNS Abuse itself.

Overview

There are four time-related categories of responses to DNS Abuse:

1. reactionary detection and removal of sources of abuse (necessarily after the fact),
2. cotemporal efforts to mitigate the amount and likelihood of abuse or its impact,
3. future-focused work on stopping abuse before it can happen, and
4. ongoing allowance of abuse for ideological or jurisdictional reasons.

Response Options

Reactionary Removal

• SAC115
• DNS Abuse Framework
• Terms of Service (ToS) notice-and-takedown regimes for use/content abuse

Cotemporal Mitigation

• DNS Abuse Institute Roadmap
• Budapest Convention
• The CDM Program offers Automation in IT Security

Prevention

• DNSSEC
• MITRE ATT&CK

Intentional Inaction & Evidentiary Collection

• IC3
• NCIJTF

Points of View

Every type of Internet user has worries over DNS Abuse and the responses to it. For instance, there is an ongoing multistakeholder debate over where to draw the line between technical abuse and content abuse. Moreover, there are technical limits on what each type of stakeholder can do to stop abuse.

Intergovernmental Organizations

IGO responses generally treat DNS Abuse as a facet of Cybercrime.

Objectives

Pro-Mitigation

• [E-Commerce Directive]
• [The Digital Services Act (DSA)
• Budapest Convention

Pro-privacy

• Pro-privacy legislation, such as the GDPR, limits access to natural persons' data.

Government Responses

Government responses tend to focus on what can be adjudicated; include content abuse, such as child pornography; and outline how and when electronic evidence can be collected.

Domestic Legislation

Federal

In the U.S., cybersecurity legislation thus far has focused on standardizing and formalizing preventative measures. Congress passed

• The Federal Information Security Management Act of 2002
• The Cybersecurity Enhancement Act of 2014 (CEA)
• The Cybersecurity and Infrastructure Security Agency Act of 2018

State

• Statewide Cybersecurity Legislation

CISA

The CISA seeks to prevent future cyberattacks on critical infrastructure. Its CDM Program is a dynamic approach to fortifying the cybersecurity of civilian government networks and systems.

FBI

The FBI leads the National Cyber Investigative Joint Task Force (NCIJTF) and runs the public-facing Internet Crime Complaint Center (IC3) to collect cybercrime and electronic evidence of other types of crimes.

Responding to State-Sponsored Cyberattacks

• SolarWinds Hacking Attack: In an executive order issued April 15, 2021, President Biden levied economic sanctions against Russian financial institutions, technology companies, and individuals that participated in this series of hacks that infiltrated nine federal agencies and over 100 private companies.
• Microsoft Email Systems Hacking Attack: On July 19, 2021, the Biden administration formally condemned but did not inflict sanctions against the Chinese government for working with hackers to breaching Microsoft email systems.

Technical Community

• IETF Security Area

Internet Governance Organizations

ICANN

So far, ICANN has been steadfast in its focus on technical DNS abuse and avoidance of policymaking around content abuse. ICANN's determination of the org's definition for DNS Abuse is based on the work product of GAC and the base gTLD Registry Agreement. Thus, ICANN considers DNS security threats to be limited to attacks involving phishing, malware, botnet command and control, pharming, and spam as a vector. As recently as ICANN 71, the ICANN board was criticized by members of the ALAC, the BC, and other Internet Governance bodies for not doing enough to steward contracted parties and non-contracted parties toward involvement in reducing abuse. However, ICANN and SSAC, in particular, have begun pointing to SAC115 and DAAR as evidence of their work on addressing DNS abuse. Parts of ICANN Org, Board, and Community dedicated to resolving DNS Abuse issues:

• OTCO monitors gTLD zone files and runs
• SSAC advises on the stability and security of the DNS, and
• Contractual Compliance is not beholden to the DNS Abuse Framework; instead, the office can reprimand registrars or registries that do not maintain abuse contacts (or a webform) to receive abuse complaints or promptly investigate allegations of DNS Abuse in good faith.
• DAAR

DNS Abuse Institute

Currently, this newcomer is entirely focused on creating an interoperable framework to reduce DNS abuse. The DNSAI acknowledges there are two options for reducing security threats: proactive and reactive methods. The institute is currently putting more of its energy into developing reactive tools because they can be used by anti-abuse or compliance personnel without requiring integration in registration platforms and thus, broad buy-in should be easier to secure.

Private Sector

Registries and Registars

European ccTLD Registries

Sebastian Felix Schwemer's 2020 analysis of 30 European ccTLD terms of services (ToS) showed several responses to use/content-related domain name abuse, including no related reservations, reactions to severe cases, and proactive screening. Some ToSes do not contractually reserve to take down a domain name due to use or content, while others do reserve the right to take down a domain name but only in severe situations. Others have established "takedown regimes" akin to that of site operators, hosting providers, and registrants (per Article 14 of the E-Commerce Directive. EURid, .be, and SIDN have begun to screen abusive use by crawling content, using fuzzy hashes, or HTML structural similarity analysis; they are also working on early warning systems. Schwemer found that only 1/3 of ccTLD ToSes contained content/use provisions and that the discretion for registrars to take down domain names via a morality clause was higher than it was for ccTLD registries. This analysis also revealed the emergence of ccTLD registries' use of data validation in a new way. Registries have noticed a correlation between domain names engaging in unlawful activities and the provision of poor registration data. Because ToSes can reserve the right to terminate registrations based on wrong or inaccurate information, some ccTLD registries are using this term as a workaround.

DNS Abuse Framework

This framework was developed by registries and registrars. The framework discourages a registry or registrar from taking action against domains, except in certain types of Website Content Abuse:

1. child sexual abuse materials,
2. illegal distribution of opioids online,
3. human trafficking, or
4. specific, credible incitements to violence

• Registrars and registry operators can

1. include their own acceptable use policies or terms of use to set forth provisions to cover Website Content Abuses,
2. contract Trusted Notifiers to monitor content and report abuse

• Registry Operators

1. Have to determine whether the domain in question was maliciously registered or if the domain has been compromised. Registries cannot generally directly remediate a compromised domain; instead, it is up to the sponsoring registrar. Conversely, if a domain has been maliciously registered, the registry has six options:
2. Suspend the domain (most common)
3. Refer to the sponsoring registrar
4. Lock the domain
5. Redirect a domain by changing the name servers
6. Transfer the domain
7. Delete the domain (generally considered an ineffective and extreme response)

If a registry encounters unregistered domain names resulting from an automatic Domain Generation Algorithm (DGA), the operator can:

1. Reserve the domains or
2. create the domains in order to suspend or sinkhole the domains for victim identification

BC

Site Operators, Registrants, and Hosting Providers can remove content. More generally, the business community wants

IP

Intellectual property lawyers

ISPCP

Internet Service and Connectivity providers

End Users

End users, even those who work in the DNS industry, need help managing DNS Abuse mainly because of the timeless effectiveness of Social Engineering Attacks. For instance, at the end of 2020, GoDaddy notoriously tested its workers to see if they would share sensitive information after clicking on dubious links from a spoofed email.