REvil on DanSec Daily

Cybersecurity Brief – 2026-04-07

Tue, 07 Apr 2026 00:00:00 +0000

Major Incidents or Breaches

Wynn Resorts disclosed that 21,000 employees were affected by the ShinyHunters hack. The company reportedly paid a ransom to prevent data leakage.
Drift Protocol attributed its recent $280M cryptocurrency theft to a six-month, in-person operation where attackers established an operational presence inside the organisation.
Axios, a popular NPM package, was compromised in a supply chain attack involving sophisticated social engineering targeting maintainers. North Korean threat actors are linked to this and similar campaigns against Node.js maintainers.
Guardarian users were targeted via 36 malicious NPM packages impersonating Strapi plugins, enabling shell execution, container escape, and credential harvesting.
The European Commission experienced a significant cyber incident, as noted in Check Point’s threat intelligence report.

Newly Discovered Vulnerabilities

Flowise AI Agent Builder is under active exploitation for a CVSS 10.0 remote code execution vulnerability. Over 12,000 instances are exposed.
Fortinet issued an emergency patch for a zero-day authentication bypass flaw (CVE-2026-35616) in FortiClient EMS, which allows unauthenticated remote code execution. CISA has mandated federal agencies patch this vulnerability.
A new GPUBreach attack technique enables privilege escalation and system takeover through Rowhammer-induced bit-flips on GPU GDDR6 memory.
Exploit code for an unpatched Windows privilege escalation zero-day (“BlueHammer”) was leaked, allowing local attackers to gain SYSTEM or administrator privileges.
Automated credential harvesting campaigns are exploiting the React2Shell flaw in vulnerable Next.js applications.
Google DeepMind researchers identified “AI Agent Traps,” a vulnerability that allows attackers to manipulate and exploit AI agents via malicious web content.

Notable Threat Actor Activity

China-linked Storm-1175 has been observed exploiting zero-day and n-day vulnerabilities to rapidly deploy Medusa ransomware in high-velocity attacks.
Qilin and Warlock ransomware groups are using the bring-your-own-vulnerable-driver (BYOVD) tactic to disable over 300 endpoint detection and response (EDR) tools during ransomware deployment.
An Iran-linked threat actor is conducting password-spraying attacks against over 300 Israeli and UAE Microsoft 365 organisations.
DPRK-linked actors are using GitHub as command-and-control infrastructure in multi-stage attacks targeting South Korean entities.
North Korean threat actors are targeting Node.js maintainers with social engineering as part of supply chain attacks.
A threat cluster tracked as UAT-10608 is automating credential harvesting by exploiting web-exposed Next.js applications.

Trends, Tools, or Tactics of Interest

There is increased use of AI-assisted tools by threat actors in supply chain attacks, as seen in the PRT-scan campaign targeting GitHub misconfigurations.
Social engineering targeting open-source maintainers is becoming industrialised, with attackers leveraging complex, scalable tactics.
The BYOVD technique remains prevalent among ransomware operators for bypassing security controls.
Open redirects continue to be widely abused in phishing campaigns.
Infostealers are harvesting credentials and session cookies at scale, outpacing traditional breach monitoring capabilities.
Developer workstations are being increasingly targeted as entry points for credential theft and lateral movement.
Shadow AI use in healthcare persists, with medical professionals adopting unsanctioned AI tools.

Regulatory or Policy Developments Affecting the Security Industry

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has ordered federal agencies to patch the actively exploited Fortinet EMS vulnerability by Friday.
The OWASP GenAI Security Project has updated its risk matrix, now recognising 21 generative AI risks and recommending tailored security approaches for GenAI and agentic AI systems.
German authorities have formally identified two Russian nationals as the leaders of the GandCrab and REvil ransomware operations between 2019 and 2021.
Microsoft has deprecated and removed the Support and Recovery Assistant (SaRA) tool from all supported Windows versions as of March 10.

Cybersecurity Brief – 2026-04-06

Mon, 06 Apr 2026 00:00:00 +0000

Major Incidents or Breaches

Drift disclosed that the $285 million theft on April 1, 2026, resulted from a six-month social engineering campaign attributed to North Korean (DPRK) threat actors, involving targeted infiltration and operational planning.
Multiple Syrian government accounts were hijacked in March, exposing significant deficiencies in the state’s cybersecurity posture and basic operational security.

Newly Discovered Vulnerabilities

Fortinet released an emergency patch for a new critical vulnerability (CVE-2026-35616) in FortiClient Enterprise Management Server (EMS), which is being actively exploited in the wild.
Attackers are exploiting the React2Shell vulnerability (CVE-2025-55182) in vulnerable Next.js applications as part of a widespread, automated credential theft campaign.

Notable Threat Actor Activity

Germany’s Federal Criminal Police Office (BKA) identified and unmasked the main actors behind the REvil (Sodinokibi) ransomware group, including the individual known as “UNKN,” linked to both REvil and GandCrab ransomware operations. The primary suspect is named as Daniil Maksimov, a 31-year-old Russian national.
North Korean (DPRK) threat actors were responsible for the $285 million Drift hack, using prolonged and sophisticated social engineering tactics.

Trends, Tools, or Tactics of Interest

Phishing scams have shifted tactics by incorporating QR codes into fake “Notice of Default” traffic violation text messages, directing recipients to phishing sites to harvest payment and personal information.
The automated exploitation of React2Shell in Next.js applications highlights an ongoing trend towards large-scale, automated credential theft campaigns targeting web application vulnerabilities.

Regulatory or Policy Developments Affecting the Security Industry

No significant regulatory or policy developments were reported in the provided headlines.

Cybersecurity Brief – 2025-08-12

Tue, 12 Aug 2025 00:00:00 +0000

Major Incidents or Breaches

Connex Credit Union disclosed a data breach affecting 172,000 members, with attackers stealing personal and financial information after breaching its systems.
The Netherlands’ National Cyber Security Centre (NCSC) reported exploitation of Citrix NetScaler vulnerability CVE-2025-6543 to breach critical organisations in the country.
Air France experienced a data breach resulting in the leak of frequent flyer data (as per Check Point’s weekly threat bulletin).
A major automaker’s dealership platform used by over 1,000 US dealerships was found to be vulnerable, allowing car hacking and personal data theft, including the ability for unauthorised remote vehicle unlocking.
Two hackers reportedly breached North Korean state-sponsored group Kimsuky, stealing and leaking internal data.
Law enforcement, in collaboration with international partners, took down infrastructure and seized over $1 million associated with the BlackSuit (Royal) ransomware group.
Over 29,000 Microsoft Exchange servers remain unpatched against a high-severity vulnerability, leaving them exposed to lateral movement and cloud environment compromise.

Newly Discovered Vulnerabilities

Researchers identified new security flaws in the TETRA (Terrestrial Trunked Radio) communications protocol, including weaknesses in its proprietary end-to-end encryption, impacting law enforcement and critical infrastructure communications.
A critical vulnerability in the OPC UA industrial protocol was disclosed, exposing utilities and factories to risk despite the protocol’s use of complex cryptography.
A sandbox escape with remote code execution was discovered in Google Chrome, earning a $250,000 bug bounty.
A path traversal vulnerability in WinRAR (CVE-2025-8088) was exploited as a zero-day by the Russian ‘RomCom’ group, targeting financial, defence, manufacturing, and logistics sectors in Europe and Canada.
A BadUSB attack technique, dubbed BadCam, was demonstrated against Lenovo Linux webcams, allowing persistent compromise via malicious USB devices.
Flaws in a major automaker’s dealership portal exposed customer and vehicle data and enabled unauthorised remote access to vehicles.

Notable Threat Actor Activity

The Russian-linked ‘RomCom’ hacking group exploited the WinRAR CVE-2025-8088 zero-day in targeted attacks on organisations in Europe and Canada.
North Korean Kimsuky hackers were themselves compromised, with internal data reportedly leaked by adversarial actors.
US authorities charged four Ghanaian nationals for their involvement in a $100 million fraud ring involving romance scams and business email compromise attacks.
The BlackSuit (Royal) ransomware gang suffered infrastructure seizures and asset forfeiture following coordinated law enforcement action.
An affiliate of the REvil ransomware group accused the Russian government of orchestrating the 2021 Kaseya supply chain attack.
Malicious actors have been actively exploiting a critical Erlang/OTP SSH vulnerability, with 70% of detected attacks targeting operational technology (OT) firewalls.

Trends, Tools, or Tactics of Interest

Surge in exploitation of Erlang/OTP SSH vulnerabilities, with a focus on OT firewall targets.
Increase in “native phishing” campaigns, where attackers abuse Microsoft 365 apps such as OneNote and OneDrive to deliver internal phishing lures.
Jailbreaking techniques for GPT-5 were demonstrated using “echo chamber” prompts and storytelling, bypassing safeguards without using inappropriate language.
The DarkBit ransomware (linked to MuddyWater) encryption was cracked by researchers, enabling free victim data recovery.
Exposure of persistent threats via USB-based attacks (BadCam) targeting Linux webcams.
Ongoing risk from large numbers of unpatched Exchange servers, facilitating potential lateral movement and cloud compromise.

Regulatory or Policy Developments

The Netherlands’ NCSC issued a public warning regarding active exploitation of Citrix NetScaler CVE-2025-6543, urging immediate remediation for critical infrastructure.

Cybersecurity Brief – 2025-06-24

Tue, 24 Jun 2025 00:00:00 +0000

Major Incidents or Breaches

McLaren Health Care reported a data breach impacting 743,000 patients following a July 2024 attack by the INC ransomware gang.
Nucor, North America’s largest steel producer, confirmed data theft in a recent cyber incident.
A database containing 184 million plaintext passwords from platforms including Facebook and Google was discovered exposed online without encryption or protection.

Newly Discovered Vulnerabilities

Citrix released patches for critical vulnerabilities in NetScaler ADC and Gateway appliances, urging customers to update to prevent exploitation.
A Windows LNK flaw was exploited by the XDigo malware in attacks against Eastern European government entities.
Scanning activity targeting Ichano AtHome IP Cameras was observed, indicating potential exploitation attempts.

Notable Threat Actor Activity

The China-linked Salt Typhoon group exploited a critical Cisco vulnerability to breach Canadian telecommunications firms, as confirmed by the Canadian Centre for Cyber Security and the FBI.
Russian state-sponsored APT28 used Signal chats to deliver two new malware strains, BeardShell and SlimAgent, in attacks targeting Ukrainian government entities.
Pro-Iranian hackers and hacktivists are assessed as likely to escalate cyberattacks against U.S. networks following recent U.S. airstrikes on Iranian nuclear sites, according to warnings from the U.S. Department of Homeland Security.
Four REvil ransomware members arrested in Russia in 2022 were released after serving time for carding and malware distribution charges.
Attackers exploited misconfigured Docker APIs and used Tor for anonymity in a cryptocurrency theft campaign, resembling tactics previously used by the Commando Cat actor.
Telegram purged Chinese crypto scam markets from its platform, but these markets quickly re-emerged under new branding.

Trends, Tools, or Tactics of Interest

SparkKitty, a new Trojan spyware for iOS and Android, was found distributed via the App Store, Google Play, and untrusted websites. It steals images, including cryptocurrency wallet seed phrases, from device galleries.
The XDigo malware, written in Go, was used in targeted attacks on Eastern European governments, leveraging the Windows LNK flaw for initial access.
A new jailbreaking technique, “Echo Chamber,” enables attackers to bypass guardrails in large language models (LLMs) like OpenAI and Google Gemini, prompting the generation of harmful content.
Attackers are increasingly using encrypted messaging apps (e.g., Signal) for malware delivery in targeted campaigns.
Google announced new multi-layered defences for its generative AI systems to address risks such as indirect prompt injection attacks.
SOCs are exploring AI-enabled workflow automation to address analyst burnout and improve operational efficiency.

Regulatory or Policy Developments Affecting the Security Industry

The U.S. Department of Homeland Security and FBI issued advisories regarding increased cyber threats from Iranian and pro-Iranian actors in response to geopolitical events.
The Canadian Centre for Cyber Security released guidance following state-sponsored intrusions into national telecom infrastructure via Cisco vulnerabilities.