Ransomware encrypts or steals data to disrupt operations and extort victims, making backups, access controls, and incident response essential.
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Background for this topic.
Ransomware is malware used to deny access to systems or data, usually by encrypting files and demanding payment for decryption. Many operations also steal sensitive information and threaten to publish it, so an attack can create both an availability crisis and a privacy or disclosure risk. Initial access may involve phishing, stolen credentials, exposed remote services, or exploitation of unpatched vulnerabilities; attackers may then move through the network before deploying the payload.
Defenses should combine vulnerability management, phishing-resistant authentication where practical, endpoint and network monitoring, and backups that are isolated from routine administrator access and regularly tested for recovery. Organizations should also limit privileges and segment critical systems to reduce the blast radius. An incident requires rapid containment, preservation of forensic evidence, restoration from known-good backups, and assessment of notification, legal, and regulatory obligations. Threat intelligence can help identify relevant criminal infrastructure or tactics, but it does not replace sound access control, patching, detection, and recovery practices.
Domain Controllers Commandeered to Distribute Malware, Warns MicrosoftRansomware hackers are hitting up Active Directory domain controllers to boost privileges within compromised networks, warns Microsoft. Nearly eight out of every 10 human-operated cyberattacks involves a breached domain controller. Securing the servers is a challenge.
Also: Ransomware Profits Down, Meta's Benchmarking ControversyIn this week's update, ISMG editors previewed our return to the RSAC Conference studios in San Francisco, explored cracks in the ransomware business model, and unpacked the debate over Meta's Llama 4 benchmarks and their implications for AI transparency.
Incident Reporting Low, Government Study FindsRansomware attacks targeting U.K. organizations continued to rise last year concluded the British government despite a low reporting rate by victims. The findings come as the government is considering banning public sector organization from paying ransom and mandating incident reporting.
Tech Giant Says Threat Actors Are Exploiting a Flaw in Widely-Targeted Windows ToolRansomware threat actors are exploiting a zero-day vulnerability discovered in a highly targeted Windows logging system tool in a campaign in part targeting U.S. IT and real estate sectors, Microsoft confirmed in a Tuesday blog post urging customers to apply available patches.
Rising Attacks Masks Lowering Profits, Attention Economy CompetitionRansomware groups' collective power to command victims' attention and compel extortion is waning, notwithstanding the disruption and chaos that continues to be their hallmark. The criminal underground powering ransomware is a world in flux where old, established groups are giving way to new brands.