Security researchers are warning of a phishing campaign that impersonates Signal Support over text message to steal users' backup recovery keys, specifically targeting journalists and activists. Once an attacker obtains the recovery key, they can decrypt the victim's entire message-history backup. The campaign relies purely on social engineering - there is no flaw in Signal's cryptography - tricking targets into handing over the secret that protects their encrypted backups. The targeting of journalists and activists points to surveillance-motivated actors rather than financially-driven crime. Signal users should treat any unsolicited 'Support' contact requesting recovery keys or codes as hostile, since Signal never asks for them.
Anthropic has confirmed it will roll out Claude Mythos-class models to the general public in the coming weeks. Mythos was originally announced in April as a restricted preview available only to select security researchers and partners; Anthropic cited significant security risks if released too broadly. The company now says it has developed sufficient guardrails. Anthropic frames the trade-off as compressing the attacker advantage: 'in the short term, this could be attackers, if frontier labs aren't careful... in the long term, defenders will more efficiently direct resources and use these models to fix bugs.' Pricing and tier availability are not yet disclosed.
Wiz has documented JINX-0164, a previously undocumented financially-motivated threat actor targeting cryptocurrency firms via recruitment-themed social engineering and bespoke macOS malware since at least mid-2025. The chain starts with credible LinkedIn profiles offering virtual meetings; victims are steered to a rogue teleconference page that delivers a malicious 'meeting client.' A bash script then pulls AUDIOFIX, a Python-based macOS infostealer and RAT, from apple.driver-store[.]com. The payload is architecture-aware (Intel and Apple Silicon), saved as ChromeUpdater, masquerades as the system audio daemon coreaudiod, and persists via launchctl. AUDIOFIX moves laterally from developer laptops into code-distribution and CI/CD infrastructure, modifying source code to steal wallets at scale.
Socket has flagged a malicious NuGet package, Sicoob.Sdk (versions 2.0.0-2.0.4), that masquerades as a C# SDK for Sicoob, one of Brazil's largest cooperative financial systems, and steals PFX certificates used to authenticate businesses with Sicoob's banking APIs. When a developer instantiates SicoobClient, the package reads the PFX file from disk, Base64-encodes it, and exfiltrates the client ID, PFX password, and encoded certificate to a hardcoded third-party Sentry endpoint. It also captures raw Boleto API responses. The package was downloaded ~500 times and the publisher has 11 other NuGet packages with ~6,000 combined downloads. Google Search AI Mode reportedly amplified the package as legitimate.
ENKI has attributed fresh attacks on South Korean military and corporate entities through March-April 2026 to the North Korean state-sponsored Kimsuky group (also Velvet Chollima). The actor spoofs security-software installation pages (nProtect Online Security and AhnLab Safe Transaction) to deliver nos-setup.exe and astx-setup.exe, which launch a MemLoader.dll payload via regsvr32.exe and establish persistence through scheduled tasks. A separate April campaign used a fake Cisco Webex page that prompted victims to run a script 'to fix camera access,' delivering an encrypted ZIP archive. Kimsuky's expanded toolset now includes the HTTPSpy variant, HelloDoor backdoor, and abuse of VS Code remote tunnels for C2.
The FBI has issued a public service announcement warning of hundreds of fake FIFA-themed phishing and fraud sites ahead of the 2026 World Cup running June 11 to July 19 in the US, Canada, and Mexico. Domains include fiffa[.]com and alternative TLDs (.org, .xyz, .live, .sale) plus fake employment portals like jobs-fifa[.]com and fifa-hiring[.]com. The fraudulent sites collect names, addresses, phone numbers, and banking/payment details; the data is used for fake-ticket sales, hospitality-package scams, identity theft, and fraudulent account creation. Group-IB and Bitdefender confirmed parallel malvertising via Google Search, Facebook, Telegram, and WhatsApp, with one major operation attributed to a Chinese-speaking gang.
CrowdStrike, Google, and The Shadowserver Foundation have disrupted the GlassWorm developer-supply-chain botnet by simultaneously cutting four resilient command-and-control channels. Active since October 2025, GlassWorm spread through malicious OpenVSX and VS Code extensions, GitHub repos, and npm packages (one March campaign hit 400+ artifacts), stealing crypto wallets and developer credentials. Its C2 was built to resist takedown: server addresses encoded in Solana transaction memo fields, configuration stored in the BitTorrent DHT, Base64 C2 paths hidden in Google Calendar event titles, and direct VPS connections for payload delivery. All four had to fall at once. Infected hosts now beacon to CrowdStrike's sinkhole at 164.92.88[.]210.
The FBI has issued a flash alert warning that the Silent Ransom Group (also tracked as Luna Moth, Chatty Spider, and UNC3753) is now sending operatives physically to US law firms to steal data. SRG actors first pose as internal IT over phone or phishing email and try to get an employee to grant a remote-desktop session; if that fails, they dispatch someone in person to plug a USB drive or external hard drive into the target's computer. The group, formed from Conti/BazarCall operators after the 2022 Conti shutdown, has targeted US legal and financial firms since 2023, extorting victims via its leak site.
Israeli firm Gambit Security has forensically linked the late-March attack on the Los Angeles County Metropolitan Transportation Authority to Iran's Ministry of Intelligence and Security (MOIS), despite the attackers branding themselves as the pro-Iran hacktivist collective 'Ababil of Minab.' The group posted videos claiming it wiped hundreds of terabytes and stole over a terabyte of files. LA Metro confirmed the breach on April 2, 2026, and had to check hundreds of servers for compromise before bringing them back online. The case illustrates a recurring pattern of state operations wearing a hacktivist costume to provide deniability while targeting critical infrastructure.
OX Security has flagged a malicious npm package, mouse5212-super-formatter (campaign codenamed Malware-Slop), designed to exfiltrate files from /mnt/user-data - the directory Anthropic's Claude uses to handle uploads and outputs. The package presents itself as an 'archive deployment sync' utility but, during the postinstall stage, authenticates to GitHub using a token found in the victim's environment (or a hard-coded fallback), creates an attacker-controlled repository, and recursively uploads every local file. It writes a fake 'network connections' log to disguise the theft. The package leaked its own GitHub token, suggesting AI-generated malware with poor OPSEC. It has ~676 downloads and remains live on npm.
TrustStrike Labs