All news with #persistence tag

🛡️ Varonis Threat Labs discovered AvisLoader, a new Windows loader found alongside a ClickFix lure and command center. The attack uses a Cloudflare-hosted lure that tricks victims into pasting and running a command which retrieves a Windows loader. AvisLoader embeds a Tox client for encrypted peer-to-peer C2, complicating domain-based takedowns and enabling operator mobility. Recovered artifacts show shortcut-based persistence, a UAC bypass helper, and process-hiding hooks, while the web-based Command Center supports tasking and file staging over Tox.

🔍 Researchers detail a resilient WordPress backdoor, codenamed SC, that uses multiple persistence mechanisms across files, the database, and shared memory to continuously rebuild itself. The malware employs obfuscated code and a substitution-cipher decoder, hiding payloads in eight locations including drop-ins, themes, mu-plugins, cache, ZIP bundles, and System V shared memory. It communicates using the Ethereum blockchain for C2, fingerprints infected sites, creates hidden admin accounts, and can deploy skimmers or arbitrary PHP/JS. Sucuri warns the infection acts as a system rather than a single file, restoring itself on the next request from any surviving copy.

🛡️ Microsoft observed July 2026 phishing campaigns that distributed a masqueraded, digitally signed MSP360 RMM installer via diverse social-engineering lures and hosting services. The installer established persistent MSP360 services after UAC elevation and was used to silently download and install a ConnectWise ScreenConnect client as a secondary remote-access channel. Threat actors then used these legitimate administration platforms to deploy additional tooling for credential access and information collection while blending into normal IT workflows.

📌 A new MacSync variant for macOS now leverages public iCloud calendar events to deliver follow-on payloads. Kaspersky found the Swift-based infostealer being distributed via ClickFix-style social engineering and fake apps, with a downloader extracting commands from calendar DESCRIPTION fields to fetch archives hosted on iCloud. The malware retains broad credential-stealing capabilities and added an Objective-C backdoor that persists via LaunchAgents, .zshrc changes, and Git hooks.

🛡️ Securonix researchers disclosed a campaign named TASK#STOMP that installs a PowerShell backdoor to harvest business documents, Wi‑Fi credentials, clipboard contents, screenshots and system metadata. The infection begins with an obfuscated VBScript executed via wscript.exe, which establishes multiple persistence mechanisms using Task Scheduler and the Startup folder while hiding and timestomping artifacts. Two hidden PowerShell modules, sys_loader.ps1 and win_conn.ps1, decode payloads and form redundant, token‑authenticated C2 channels that mutually monitor and restart each other. The attackers also open a URL in Chrome and run a cleanup batch script, and the operation relies heavily on native Windows components to evade detection.

🔎 Acronis TRU attributes a rapid, multi-country campaign to suspected China-linked actor Red Heron that weaponized a disclosed Gitea RCE (CVE-2026-60004) to compromise internet-facing instances. The operator scanned and exploited hundreds of servers, stole source code and secrets, and escalated to persistent access and lateral movement, including root control of a Proxmox cluster. Analysts identified a C++ implant JITTERLY and an LD_PRELOAD rootkit SIXZUT used to hide activity and maintain persistence.

🛡️ Cybersecurity researchers disclosed a novel Go-based loader called HollowFrame and a Rust backdoor family named Matryoshka, revealed after a phishing intrusion against a law firm. The attack begins with an encrypted archive containing a malicious LNK that triggers a staged chain, uses DLL side-loading with a rogue python311.dll, weakens Defender, and establishes persistence via scheduled tasks. Matryoshka variants communicate over HTTP or via a GitHub-based C2 to receive commands, exfiltrate data, and deliver secondary payloads.

🔍 This Huntress investigation examines a June intrusion that began via an SQL injection on a public web page. The attacker performed reconnaissance, enabled RDP, created an admin account, disabled Windows Defender, and installed backdoors and malicious IIS modules. They also deployed a hidden cryptocurrency miner and used silent PowerShell scripts to persist and evade detection. The report highlights why fixing the root cause is as important as removing attacker tools.

🛡️ Fortinet researchers uncovered a TrickBot variant that abandons HTTP for a custom DNS tunneling C2 channel, embedding encrypted commands and payloads within malformed DNS queries. The modular malware uses single-byte XOR encoding, hex-encoding and 63-character domain chunking for outbound beacons, while inbound data hides in multiple IPv4 addresses returned by resolvers. Persistence relies on Windows Task Scheduler with NTFS ADS, and command handling retains prior modular capabilities for executing modules, DLLs, PowerShell and shellcode.

🔒 Researchers report that DragonForce operators covertly used Microsoft Teams TURN relay servers to mask command-and-control traffic while infiltrating a major US services firm during a 2025 campaign. The attackers deployed a Go-based RAT, named Backdoor.Turn, which obtained anonymous Teams visitor tokens and established QUIC sessions to attacker-controlled servers. They also exploited an undocumented Huawei driver vulnerability and modified system settings to maintain persistence, exfiltrate data and deploy DragonForce ransomware.

🛡️ Volexity researchers attribute prolonged intrusions to the Chinese espionage group UNC5221 (aka VerdantBamboo), which used the Brickstorm backdoor plus previously undocumented malware Plenet and AgentPSD to maintain access. The actor compromised an MSP and victim systems, remaining undetected for at least 18 months and returning after remediation. Plenet is a cross-platform .NET backdoor; AgentPSD is a Python reverse shell used as fallback persistence.

🛡️ Cisco patched a high-severity SSRF in Unified Communications Manager, while Russia reported large-scale mobile spyware targeting officials and ongoing investigations. Threat actors continue to distribute VIP Keylogger via layered social engineering and JavaScript loaders, and DriveSurge operates a widespread malware delivery network using ClickFix and FakeUpdates. U.S. sanctions hit major Iranian crypto exchanges; RMM and trusted tools are increasingly abused for persistence and privilege escalation.

🛡️ReliaQuest researchers observed ClickFix intrusions that now leverage the open-source proxy PySoxy to establish a secondary encrypted C2 path alongside an initial PowerShell controller. The April campaign used scheduled tasks for persistence and deployed Python tooling to C:\ProgramData to execute compiled .pyc modules, turning endpoints into proxy relays. This dual-channel design preserves access if the PowerShell channel is disrupted, forcing broader containment and new hunting approaches.

🔐 ReliaQuest researchers describe a campaign where social-engineering ClickFix techniques were paired with the decade-old Python SOCKS5 proxy PySoxy to maintain persistent access on compromised hosts. Attackers staged the proxy after reconnaissance and used a scheduled task for re-execution, so blocking the initial ClickFix vector did not fully remove access. Analysts advise treating these incidents as active compromises and hunting for Python proxy artifacts, scheduled tasks, and staged components rather than assuming a blocked C2 equals containment.

🔐 Researchers disclosed a new Linux backdoor called PamDOORa, advertised on the Russian cybercrime forum Rehub by an actor named "darkworm". The PAM-based post-exploitation toolkit provides persistent OpenSSH access via a magic password and specific TCP port and can harvest credentials for all users who authenticate through the compromised host. Flare.io says the implant also includes anti-forensic features to tamper with authentication logs and evasion techniques. The seller listed it at $1,600 in March 2026, later reducing the price to about $900.

🛡️ A sustained phishing campaign named Venomous#Helper is abusing signed remote monitoring and management (RMM) tools to install persistent backdoors on Windows hosts. Researchers at Securonix say attackers used SSA-branded lures that redirected via a compromised Mexican domain to a signed JWrapper binary masquerading as a government document. The payload deploys a cracked SimpleHelp build alongside a ConnectWise ScreenConnect relay, creating dual access channels and robust persistence mechanisms that evade basic gateway and EDR checks.

🐍 Securonix has identified a stealthy Python-based backdoor, Deep#Door, that uses an obfuscated batch loader to install a persistent implant on Windows systems. The self-contained dropper embeds and reconstructs its Python payload at runtime, disables security controls such as Windows Defender, and leverages multiple persistence mechanisms to maintain access. It uses public TCP tunneling for C2 and supports credential theft, keylogging, media capture and optional destructive actions, complicating detection and remediation.

🛡️ Securonix researchers disclosed a stealthy Python-based backdoor named DEEP#DOOR that establishes persistent access and extensive surveillance on compromised Windows hosts. Delivered via an obfuscated batch dropper, the implant extracts and runs an embedded svc.py payload and uses the public Rust-based tunneling service bore.pub for command-and-control. Its capabilities include remote shells, credential and key theft, webcam and audio capture, and robust anti-analysis measures.

🛡️ Security teams are being urged to inspect Cisco ASA and Firepower devices following discovery of a resilient backdoor called Firestarter that can persist after patching and survive normal reboots. CISA and the UK’s NCSC recommend generating a core dump and running their published YARA rules (or scanning a disk image) to detect the implant. If an infection is confirmed, the advisory states the device must be physically disconnected from all power sources, including redundant and backup supplies, for at least one minute or be fully reimaged — a standard reboot or power cycle is not sufficient.

🔥 A custom backdoor named Firestarter has been observed persisting on Cisco Firepower and Secure Firewall devices running ASA or FTD software, surviving reboots, firmware updates, and security patches. U.S. CISA and the U.K. NCSC link the activity to a threat actor tracked as UAT-4356, which exploited CVE-2025-20333 and CVE-2025-20362. Cisco recommends reimaging and upgrading affected devices; administrators can check compromise with show kernel process | include lina_cs, and CISA published YARA rules and mitigation guidance.