Insights

Pakistan Arrests 21 in ‘Heartsender’ Malware Service

Authorities in Pakistan have arrested 21 individuals accused of operating “Heartsender,” a once popular spam and malware dissemination service that operated for more than a decade. The main clientele for HeartSender were organized crime groups that tried to trick victim companies into making payments to a third party, and its alleged proprietors were publicly identified by KrebsOnSecurity in 2021 after they inadvertently infected their computers with malware. Some of the core developers and sellers of…

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New Guidance for SIEM and SOAR Implementation

Today, CISA, in collaboration with the Australian Signals Directorate’s Australian Cyber Security Centre (ASD’s ACSC) and other international and U.S. partners, released new guidance for organizations seeking to procure Security Information and Event Management (SIEM) and Security Orchestration, Automation, and Response (SOAR) platforms. This guidance includes the following three resources: Implementing SIEM and SOAR Platforms – Executive Guidance outlines how executives can enhance their organization’s cybersecurity framework by implementing these technologies to improve visibility into…

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Oops: DanaBot Malware Devs Infected Their Own PCs

The U.S. government today unsealed criminal charges against 16 individuals accused of operating and selling DanaBot, a prolific strain of information-stealing malware that has been sold on Russian cybercrime forums since 2018. The FBI says a newer version of DanaBot was used for espionage, and that many of the defendants exposed their real-life identities after accidentally infecting their own systems with the malware. DanaBot’s features, as promoted on its support site. Image: welivesecurity.com. Initially spotted…

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Advisory Update on Cyber Threat Activity Targeting Commvault’s SaaS Cloud Application (Metallic)

Commvault is monitoring cyber threat activity targeting their applications hosted in their Microsoft Azure cloud environment. Threat actors may have accessed client secrets for Commvault’s (Metallic) Microsoft 365 (M365) backup software-as-a-service (SaaS) solution, hosted in Azure. This provided the threat actors with unauthorized access to Commvault’s customers’ M365 environments that have application secrets stored by Commvault. See the following resource for more information: Notice: Security Advisory (Update). CISA believes the threat activity may be part of…

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New Best Practices Guide for Securing AI Data Released

Today, CISA, the National Security Agency, the Federal Bureau of Investigation, and international partners released a joint Cybersecurity Information Sheet on AI Data Security: Best Practices for Securing Data Used to Train & Operate AI Systems.  This information sheet highlights the critical role of data security in ensuring the accuracy, integrity, and trustworthiness of AI outcomes. It outlines key risks that may arise from data security and integrity issues across all phases of the AI…

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Cybersecurity and AI: Integrating and Building on Existing NIST Guidelines

What is NIST up to? On April 3, 2025, NIST hosted a Cybersecurity and AI Profile Workshop at our National Cybersecurity Center of Excellence (NCCoE) to hear feedback on our concept paper which presented opportunities to create profiles of the NIST Cybersecurity Framework (CSF) and the NIST AI Risk Management Framework (AI RMF). These would serve to support the cybersecurity community as they adopt AI for cybersecurity, need to defend against AI-enabled cybersecurity attacks, as well as protect AI systems…

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Threat Actors Target U.S. Critical Infrastructure with LummaC2 Malware

Today, CISA and the Federal Bureau of Investigation released a joint Cybersecurity Advisory, LummaC2 Malware Targeting U.S. Critical Infrastructure Sectors. This advisory details the tactics, techniques, and procedures, and indicators of compromise (IOCs) linked to threat actors deploying LummaC2 malware. This malware poses a serious threat, capable of infiltrating networks and exfiltrating sensitive information, to vulnerable individuals’ and organizations’ computer networks across U.S. critical infrastructure sectors. As recently as May 2025, threat actors have been…

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Russian GRU Cyber Actors Targeting Western Logistics Entities and Tech Companies

Today, CISA, the National Security Agency, the Federal Bureau of Investigation, and other U.S. and international partners released a joint Cybersecurity Advisory, Russian GRU Targeting Western Logistics Entities and Technology Companies.   This advisory details a Russian state-sponsored cyber espionage-oriented campaign targeting technology companies and logistics entities, including those involved in the coordination, transport, and delivery of foreign assistance to Ukraine. Russian General Staff Main Intelligence Directorate (GRU) 85th Main Special Service Center, military unit…

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KrebsOnSecurity Hit With Near-Record 6.3 Tbps DDoS

KrebsOnSecurity last week was hit by a near record distributed denial-of-service (DDoS) attack that clocked in at more than 6.3 terabits of data per second (a terabit is one trillion bits of data). The brief attack appears to have been a test run for a massive new Internet of Things (IoT) botnet capable of launching crippling digital assaults that few web destinations can withstand. Read on for more about the botnet, the attack, and the…

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Breachforums Boss to Pay $700k in Healthcare Breach

In what experts are calling a novel legal outcome, the 22-year-old former administrator of the cybercrime community Breachforums will forfeit nearly $700,000 to settle a civil lawsuit from a health insurance company whose customer data was posted for sale on the forum in 2023. Conor Brian Fitzpatrick, a.k.a. “Pompompurin,” is slated for resentencing next month after pleading guilty to access device fraud and possession of child sexual abuse material (CSAM). A redacted screenshot of the…

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