CyberSecurity Updates

21 May

Russian GRU Cyber Actors Targeting Western Logistics Entities and Tech Companies

Attacks, Insights, Malware

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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21 May

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

Attacks, Insights, 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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21 May

ESET APT Activity Report Q4 2024–Q1 2025

Information

ESET APT Activity Report Q4 2024–Q1 2025 summarizes notable activities of selected advanced persistent threat (APT) groups that were documented by ESET researchers from October 2024 until the end of March 2025. The highlighted operations are representative of the broader landscape of threats we investigated during this period, illustrating the key trends and developments, and contain only a fraction of the cybersecurity intelligence data provided to customers of ESET’s private APT reports. During the monitored…

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21 May

The who, where, and how of APT attacks in Q4 2024–Q1 2025

Information

ESET Chief Security Evangelist Tony Anscombe highlights key findings from the latest issue of the ESET APT Activity Report 19 May 2025 Today, the ESET research team released its latest issue of the APT Activity Report that details the operations of some of the world’s most notorious nation state-affiliated hacking collectives from October 2024 to March 2025. Their analysis reveals sustained efforts by advanced threat actors targeting a broad array of geographies and industry sectors,…

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20 May

KrebsOnSecurity Hit With Near-Record 6.3 Tbps DDoS

Information, Insights

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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17 May

Operation RoundPress

Information

This blogpost introduces an operation that we named RoundPress, targeting high-value webmail servers with XSS vulnerabilities, and that we assess with medium confidence is run by the Sednit cyberespionage group. The ultimate goal of this operation is to steal confidential data from specific email accounts. Key points of this blogpost: In Operation RoundPress, the compromise vector is a spearphishing email leveraging an XSS vulnerability to inject malicious JavaScript code into the victim’s webmail page. In…

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17 May

Sednit abuses XSS flaws to hit gov’t entities, defense companies

Information

Operation RoundPress targets webmail software to steal secrets from email accounts belonging mainly to governmental organizations in Ukraine and defense contractors in the EU 15 May 2025 ESET researchers have discovered a cyberespionage operation that abuses cross-site scripting (XSS) vulnerabilities, including a zero-day XSS flaw in MDaemon webmail software, to steal confidential information from specific email accounts belonging to officials working for various governmental organizations in Ukraine and defense contractors in Europe and on other…

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15 May

Breachforums Boss to Pay $700k in Healthcare Breach

Data Breaches, Information, Insights

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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15 May

CISA Releases Twenty-Two Industrial Control Systems Advisories

Attacks, Insights, Malware

CISA released twenty-two Industrial Control Systems (ICS) advisories on May 15, 2025. These advisories provide timely information about current security issues, vulnerabilities, and exploits surrounding ICS. ICSA-25-135-01 Siemens RUGGEDCOM APE1808 Devices ICSA-25-135-02 Siemens INTRALOG WMS ICSA-25-135-03 Siemens BACnet ATEC Devices ICSA-25-135-04 Siemens Desigo ICSA-25-135-05 Siemens SIPROTEC and SICAM ICSA-25-135-06 Siemens Teamcenter Visualization ICSA-25-135-07 Siemens IPC RS-828A ICSA-25-135-08 Siemens VersiCharge AC Series EV Chargers ICSA-25-135-09 Siemens User Management Component (UMC) ICSA-25-135-10 Siemens OZW Web Servers ICSA-25-135-11…

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14 May

Patch Tuesday, May 2025 Edition

Information, Insights

Microsoft on Tuesday released software updates to fix at least 70 vulnerabilities in Windows and related products, including five zero-day flaws that are already seeing active exploitation. Adding to the sense of urgency with this month’s patch batch from Redmond are fixes for two other weaknesses that now have public proof-of-concept exploits available. Microsoft and several security firms have disclosed that attackers are exploiting a pair of bugs in the Windows Common Log File System (CLFS)…

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