Threats Tagged 'credential stealer'

A stealthy new backdoor called Mistic has been deployed in cybercrime intrusions since April 2026, potentially linked to Woodgnat, an initial access broker associated with multiple ransomware operations including Qilin, Interlock, Rhysida, Akira, 8Base and Black Basta. Mistic was deployed alongside ModeloRAT in at least one case, a tool developed by Woodgnat. The backdoor uses sideloading techniques through legitimate Microsoft files and executes payloads in memory without writing to disk. It includes typical backdoor capabilities plus a self-delete kill switch for enhanced stealth. Targeting appears opportunistic across insurance, education, IT and professional services sectors. Woodgnat operates as an IAB, establishing durable remote access within enterprises and selling this access to ransomware affiliates, using various social-engineering techniques including ClickFix, FileFix and CrashFix lures delivered through compromised WordPress sites.

A sophisticated Rust-based macOS implant named macOS.Gaslight has been discovered, featuring a novel 3.5 KB prompt-injection payload containing 38 fabricated system messages designed to disrupt LLM-assisted malware analysis. The backdoor communicates via Telegram Bot API with AES-GCM encrypted payloads over certificate-pinned TLS and includes self-redaction capabilities to hide its bot token from logs. It provides operators with an interactive shell, system information collection, and credential stealing capabilities through a bundled Python script that targets browser data, keychains, and command histories. The implant uses runtime-fetched CPython interpreters and establishes persistence through a LaunchAgent masquerading as an Apple system service. This threat is assessed with high confidence to be aligned with DPRK activity and represents a significant evolution in adversarial techniques targeting security analysts rather than sandbox environments.

OnyxC2 emerged in early 2026 as a malware-as-a-service stealer sold on cybercrime networks for $250 monthly. The platform includes a web panel, payload builder, and tiered pricing structure with refund guarantees. Written in C++ with assembly for direct syscalls, it targets approximately 210 applications across nine categories: 45 browsers, 109 extensions including 2FA tools, 5 password managers, 17 cryptocurrency wallets, 11 FTP clients, 5 email clients, and VPN/messaging applications. The stealer achieves 99% detection evasion through mutated builds and delivers via DLL sideloading using signed binaries. Higher tiers unlock remote access capabilities including HVNC, LSASS dumping, reverse SOCKS5 proxy, keylogging, and reverse shell. Distribution occurs through fake installers delivered as password-protected archives, with C2 communication over Cloudflare-fronted HTTPS to akmuniverstall.top.