BraZetsu Malware Turns Compromised Windows Hosts Into Criminal Marketplace Inventory

Cybersecurity researchers have disclosed details of a sophisticated Python-based Windows malware framework called BraZetsu that fuels an underground marketplace commercializing access to compromised hosts. "Unlike the standard infostealer model, BraZetsu is a comprehensive master toolkit that...

New Mistic Backdoor Linked to KongTuke in ClickFix and ModeloRAT Campaigns

A new, stealthy backdoor named Mistic has been deployed as part of suspected financially motivated attacks aimed at multiple organizations spanning insurance, education, IT, and professional services sectors since April 2026. According to Symantec and Carbon Black's Threat Hunter Team, the...

Dismantling FortiBleed: Inside a Russian Fortinet Compromise Operation

SOCRadar Threat Research Unit STRU has reported FortiBleed, a large-scale credential-harvesting operation targeting more than 430,000 FortiGate firewalls globally. The investigation also confirmed the breach of a NATO-aligned defense contractor. Based on the observed activity, the threat actor is...

FortiBleed Targeted FortiGate Firewalls in 110 Million-Credential Harvesting Operation

A Russian-speaking initial access broker IAB driven by financial gain is assessed to be behind a large-scale credential-harvesting operation known as FortiBleed that has targeted over 430,000 FortiGate firewalls globally. The campaign, active since February 2026, involves collecting credential...

DragonForce Hackers Abuse Microsoft Teams Relays to Hide Backdoor.Turn C2 Traffic

Threat actors associated with the DragonForce ransomware have been observed using a custom Go-based remote access trojan RAT called Backdoor.Turn to conceal command-and-control C2 traffic inside Microsoft Teams relay infrastructure. According to findings from Broadcom-owned Symantec and Carbon...

Phishing Campaign Hits 80+ Orgs Using SimpleHelp and ScreenConnect RMM Tools

An active phishing campaign has been observed targeting multiple vectors since at least April 2025 with legitimate Remote Monitoring and Management RMM software as a way to establish persistent remote access to compromised hosts. The activity, codenamed VENOMOUSHELPER , has impacted over 80...

U.S. Sentences Russian Hacker to 6.75 Years for Role in $9M Ransomware Damage

A 26-year-old Russian citizen has been sentenced in the U.S. to 6.75 years 81 months in prison for his role in assisting major cybercrime groups, including the Yanluowang ransomware crew, in conducting numerous attacks against U.S. companies and other organizations. According to the U.S. Departme...

New Malware Campaign Delivers Remcos RAT Through Multi-Stage Windows Attack

Cybersecurity researchers have disclosed details of a new campaign dubbed SHADOWREACTOR that employs an evasive multi-stage attack chain to deliver a commercially available remote administration tool called Remcos RAT and establish persistent, covert remote access. "The infection chain follows a...

Storm-0249 Escalates Ransomware Attacks with ClickFix, Fileless PowerShell, and DLL Sideloading

The threat actor known as Storm-0249 is likely shifting from its role as an initial access broker to adopt a combination of more advanced tactics like domain spoofing, DLL side-loading, and fileless PowerShell execution to facilitate ransomware attacks. "These methods allow them to bypass defense...

RomCom Uses SocGholish Fake Update Attacks to Deliver Mythic Agent Malware

The threat actors behind a malware family known as RomCom targeted a U.S.-based civil engineering company via a JavaScript loader dubbed SocGholish to deliver the Mythic Agent. "This is the first time that a RomCom payload has been observed being distributed by SocGholish," Arctic Wolf Labs...

Russian Ransomware Gangs Weaponize Open-Source AdaptixC2 for Advanced Attacks

The open-source command-and-control C2 framework known as AdaptixC2 is being used by a growing number of threat actors, some of whom are related to Russian ransomware gangs. AdaptixC2 is an emerging extensible post-exploitation and adversarial emulation framework designed for penetration testing...

Detour Dog Caught Running DNS-Powered Malware Factory for Strela Stealer

A threat actor named Detour Dog has been outed as powering campaigns distributing an information stealer known as Strela Stealer. That's according to findings from Infoblox, which found the threat actor to maintain control of domains hosting the first stage of the stealer, a backdoor called...

CountLoader Broadens Russian Ransomware Operations With Multi-Version Malware Loader

Cybersecurity researchers have discovered a new malware loader codenamed CountLoader that has been put to use by Russian ransomware gangs to deliver post-exploitation tools like Cobalt Strike and AdaptixC2, and a remote access trojan known as PureHVNC RAT. "CountLoader is being used either as par...

CountLoader Broadens Russian Ransomware Operations With Multi-Version Malware Loader

Cybersecurity researchers have discovered a new malware loader codenamed CountLoader that has been put to use by Russian ransomware gangs to deliver post-exploitation tools like Cobalt Strike and AdaptixC2, and a remote access trojan known as PureHVNC RAT. "CountLoader is being used either as par...

Gold Melody IAB Exploits Exposed ASP.NET Machine Keys for Unauthorized Access to Targets

The Initial Access Broker IAB known as Gold Melody has been attributed to a campaign that exploits leaked ASP.NET machine keys to obtain unauthorized access to organizations and peddle that access to other threat actors. The activity is being tracked by Palo Alto Networks Unit 42 under the monike...

Gold Melody IAB Exploits Exposed ASP.NET Machine Keys for Unauthorized Access to Targets

The Initial Access Broker IAB known as Gold Melody has been attributed to a campaign that exploits leaked ASP.NET machine keys to obtain unauthorized access to organizations and peddle that access to other threat actors. The activity is being tracked by Palo Alto Networks Unit 42 under the monike...

Chinese Hackers Exploit Ivanti CSA Zero-Days in Attacks on French Government, Telecoms

The French cybersecurity agency on Tuesday revealed that a number of entities spanning governmental, telecommunications, media, finance, and transport sectors in the country were impacted by a malicious campaign undertaken by a Chinese hacking group by weaponizing several zero-day vulnerabilities...

Cyber Criminals Exploit Open-Source Tools to Compromise Financial Institutions Across Africa

Cybersecurity researchers are calling attention to a series of cyber attacks targeting financial organizations across Africa since at least July 2023 using a mix of open-source and publicly available tools to maintain access. Palo Alto Networks Unit 42 is tracking the activity under the moniker...

Cyber Criminals Exploit Open-Source Tools to Compromise Financial Institutions Across Africa

Cybersecurity researchers are calling attention to a series of cyber attacks targeting financial organizations across Africa since at least July 2023 using a mix of open-source and publicly available tools to maintain access. Palo Alto Networks Unit 42 is tracking the activity under the moniker...

Initial Access Brokers Target Brazil Execs via NF-e Spam and Legit RMM Trials

Cybersecurity researchers are warning of a new campaign that's targeting Portuguese-speaking users in Brazil with trial versions of commercial remote monitoring and management RMM software since January 2025. "The spam message uses the Brazilian electronic invoice system, NF-e, as a lure to entic...