All news with #botnet tag

🔍 Kazuar, attributed to the Russian state actor Secret Blizzard, has progressed from a traditional backdoor into a modular peer-to-peer botnet engineered for espionage and persistent access. Its architecture separates functionality into Kernel, Bridge, and Worker modules, enabling leader election and SILENT-mode behavior to minimize external visibility. Delivery methods include the Pelmeni dropper and .NET loaders that bind payloads to targeted hosts. The malware uses named pipes, mailslots, and window messaging with AES-encrypted IPC and multiple C2 transports for resilience and stealth.

🛡️ Hunt.io has uncovered a Mirai-derived botnet that self-identifies as xlabs_v1 and targets internet-exposed devices running Android Debug Bridge (ADB) to conscript them into DDoS campaigns. The malware supports 21 flood variants across TCP, UDP, and raw protocols and is offered as a DDoS-for-hire service aimed at game servers and Minecraft hosts. It targets devices with ADB enabled by default—such as Android TV boxes, set-top boxes, smart TVs—and includes multi-architecture binaries for routers and IoT hardware. The bot probes device bandwidth to tier victims and uses a "killer" subsystem to evict competing malware.

🤖 A botnet is a network of compromised internet-connected devices controlled by attackers to perform coordinated criminal tasks such as DDoS, spam, crypto-mining, or malware distribution. Modern botnets use distributed architectures — from centralized command-and-control servers to peer-to-peer propagation — and often hide control traffic via IRC, HTTP, Telnet, or even public platforms. Defenders combine user training, patching, IoT hardening, antivirus, traffic filtering and CDN services with threat hunting methods like flow analysis and malware reverse-engineering.

🛡️ A Brazilian DDoS-mitigation firm, Huge Networks, was implicated in enabling a Mirai-based botnet that launched sustained DDoS attacks against regional Brazilian ISPs. An exposed archive contained Portuguese Python attack scripts, private SSH keys belonging to CEO Erick Nascimento, and tooling that mass-scanned for TP-Link Archer AX21 devices vulnerable to CVE-2023-1389. The CEO says the malicious activity followed a January 2026 intrusion, that affected droplets were wiped and keys rotated, and that a third-party forensics firm has been engaged.

⚠️ The UK’s National Cyber Security Centre (NCSC-UK), alongside international partners, warns that China‑nexus threat actors are increasingly using large proxy networks of compromised consumer devices to route traffic and evade detection. These covert networks are largely composed of compromised SOHO routers, IoT cameras, DVRs, and NAS devices, and enable traffic to exit near intended targets to defeat geographic and static-IP defenses. Authorities point to large botnets such as Raptor Train (over 260,000 infected devices in 2024) and disrupted operations like KV‑Botnet; defenders are urged to deploy multifactor authentication, map edge devices, consume dynamic threat feeds, use allowlists, and adopt zero-trust and machine certificate verification.

🔒 A new Mirai-based campaign is actively exploiting CVE-2025-29635, a command-injection RCE that affects D-Link DIR-823X routers, to enlist devices into a botnet. Akamai's SIRT observed the activity in March 2026 and found attackers downloading and executing a shell script that installs a multi-architecture Mirai variant called tuxnokill. The affected DIR-823X line reached end of life in November 2024 and is unlikely to receive a vendor patch. Users are advised to replace EoL devices, disable remote administration, change default passwords, and monitor for configuration changes.

🔍Check Point researchers found a SystemBC C2 server linked to an affiliate of the The Gentlemen RaaS operation controlling a botnet of more than 1,570 compromised corporate hosts worldwide. SystemBC establishes SOCKS5 tunnels and communicates with its C2 using a custom RC4‑encrypted protocol, enabling payload download or in‑memory execution. The activity aligns with The Gentlemen’s multi‑platform double‑extortion campaigns that abuse GPOs, exposed services, and compromised credentials to escalate access and deploy ransomware.

🔒 Check Point Research uncovered a SystemBC proxy botnet of over 1,570 infected hosts tied to a Gentlemen ransomware affiliate, with telemetry indicating primarily corporate victims across the US, UK, Germany, Australia, and Romania. The discovery shows affiliates pairing SystemBC SOCKS5 tunneling with Cobalt Strike for covert payload delivery and lateral movement. Check Point published IoCs and a YARA signature to help defenders identify related activity.

⚠️Fortinet researchers observed a campaign exploiting a command injection flaw (CVE-2024-3721) in TBK DVR systems to deploy a Mirai-based, multi-architecture botnet called Nexcorium. Attackers deliver a downloader via crafted HTTP requests that retrieves ARM, MIPS and x86-64 payloads and executes them with elevated privileges. The malware leverages an XOR-encoded configuration, embedded credential lists for brute-force access and multiple persistence mechanisms, and network traffic includes a custom HTTP header referencing Nexus Team that may indicate the actor.

🔒 Fortinet FortiGuard Labs and Palo Alto Networks Unit 42 report that threat actors are exploiting a command injection flaw, CVE-2024-3721, in TBK DVR devices to deliver a Mirai-family loader tracked as Nexcorium. The loader installs architecture-specific binaries, establishes persistence via crontab and systemd, and uses hard-coded credential lists plus an exploit for CVE-2017-17215 to spread to Huawei HG532 devices. Unit 42 also observed automated scans targeting EoL TP-Link routers via CVE-2023-33538, though initial attempts were flawed and did not achieve compromise. Researchers warn that unpatched, unsupported IoT devices and default credentials continue to enable large-scale DDoS botnets and recommend replacing EoL hardware and removing default passwords.

🛡️ FortiGuard Labs analyzed exploitation of CVE-2024-3721 against TBK DVR devices that delivered a Mirai-style, multi-architecture botnet named Nexcorium. The campaign used a downloader called "dvr" (nexuscorp-prefixed binaries) and a custom "X-Hacked-By" HTTP header linked to a suspected "Nexus Team" actor. Nexcorium includes scanning, brute-force credential lists, multiple persistence methods, integrity checks, and a broad DDoS toolkit controlled by a central C2.

🔎 Unit 42 observed automated scans targeting CVE-2023-33538 in several end-of-life TP‑Link routers (TL‑WR940N, TL‑WR740N, TL‑WR841N). Payloads resembled Mirai-like botnet binaries and attempted to download and execute an arm7 ELF, but in-the-wild attempts were flawed and generally failed. Emulation and reverse engineering confirmed a real command-injection flaw in the ssid1 parameter that reaches a system shell, but successful exploitation requires web authentication (default credentials like admin:admin remain a practical risk). TP‑Link lists the devices as EOL with no patches; Unit 42 recommends replacing affected units and avoiding default credentials while using layered protections.

🔒 Cisco Talos researchers disclosed a previously undocumented botnet named PowMix that has been active against workers in the Czech Republic since at least December 2025. The campaign uses malicious ZIP attachments containing a Windows LNK that launches a PowerShell loader to extract and run the malware in memory while opening decoy compliance-themed documents. PowMix establishes persistence via a scheduled task, verifies process trees to avoid duplicate instances, and uses randomized beaconing intervals and REST-like C2 URL paths that embed encrypted heartbeat data and unique victim identifiers to evade network detections. The bot supports remote code execution, dynamic C2 migration, and self-deletion commands.

🔍 Cisco Talos identified an active PowerShell-based botnet dubbed PowMix, operating since at least December 2025 and targeting organizations and job applicants in the Czech Republic. The campaign deploys phishing ZIP archives containing LNK shortcuts that launch an obfuscated PowerShell loader which bypasses AMSI and executes a decrypted payload in memory. Talos observed tactical overlap with ZipLine and published IOCs and detection guidance.

📱 Mirax is a newly observed Android Remote Access Trojan distributed via Meta advertisements that reached over 220,000 accounts, primarily in Spanish-speaking countries. According to Cleafy, Mirax pairs conventional RAT capabilities—keystroke capture, overlays, camera and SMS access—with an embedded SOCKS5 residential proxy implemented over Yamux to route attacker traffic through victim IPs. The threat uses GitHub-hosted droppers, selectable crypters (Virbox, Golden Crypt), and multi-stage installation flows that request accessibility permissions to persist and evade analysis. Researchers note the platform is offered as a selective MaaS to vetted affiliates, increasing its operational and monetization potential.

🛡️ A concise roundup of the week's notable incidents: a resilient hybrid variant of Phorpiex combines HTTP C2 polling with a P2P protocol to survive takedowns, while a 13‑year‑old chainable flaw in Apache ActiveMQ (CVE-2026-34197) can yield stealthy RCE if left unpatched. Industry data show record cyber‑fraud losses and a spike in AI‑assisted DDoS tactics. Multiple supply‑chain and platform abuses—from trojanized developer tools to malicious PyPI packages and SaaS notification phishing—underscore the need to patch, audit, and harden AI integrations.

🔍 Cybersecurity firm Darktrace has identified a new variant of the Chaos botnet that targets misconfigured cloud deployments, expanding the malware's focus beyond routers and edge devices. The 64-bit ELF binary was delivered to a deliberately misconfigured Hadoop honeypot via an HTTP request that created an application embedding shell commands to fetch and execute the payload from pan.tenire[.]com. The updated sample removes SSH- and router-based spread features and instead implements a SOCKS proxy, enabling compromised hosts to relay attacker traffic and broadening the botnet's monetization and evasion capabilities.

📈 NETSCOUT’s ATLAS platform recorded more than 8 million DDoS attacks across 203 countries during the second half of 2025, revealing a decisive shift toward multiterabit capacity and AI-enabled operations. IoT-based botnets such as Aisuru and TurboMirai variants produced demonstration floods up to 30Tbps and 4Gpps, while dark-web LLMs and conversational interfaces lowered the barrier for complex, multivector campaigns. Persistent pressure on DNS root servers and NTP services highlighted the importance of globally distributed, intelligence-driven defenses.

🛡️Masjesu, also tracked as XorBot, is a stealthy DDoS-for-hire botnet that targets diverse IoT devices including routers, gateways, cameras, DVRs and NVRs. First observed in 2023 and updated through 2024, it uses XOR-based obfuscation, avoids blocklisted ranges (including DoD IPs), and emphasizes persistence and low visibility. After binding a hard-coded TCP port (55988) the malware establishes persistence, disables common tools like wget and curl, and connects to remote controllers to receive flood commands. Its traffic is concentrated in Vietnam, Ukraine, Iran, Brazil, Kenya and India, with Vietnam accounting for nearly half of observed activity.

🛡️ An active campaign is exploiting internet-exposed ComfyUI instances to recruit them into a cryptomining and proxy botnet. Censys researchers found attacker tooling that scans cloud IP ranges, abuses unsafe custom nodes for unauthenticated remote code execution, and installs miners (XMRig, lolMiner) and a Hysteria V2 proxy. The payloads persist via periodic retrieval of a ghost.sh script and use techniques such as LD_PRELOAD and chattr +i to resist removal, while a Flask-based C2 panel provides centralized control. Defenders are advised not to expose ComfyUI publicly, to require authentication, and to remove or audit any nodes that execute raw Python.