Threats Tagged 'aitm phishing'

Multiple cloud accounts have been compromised through passkey-themed social engineering campaigns since May 2026. Attackers impersonate IT helpdesk staff via phone calls or SMS, directing victims to phishing sites that mimic Microsoft sign-in pages. After obtaining credentials through adversary-in-the-middle or device code authentication flows, attackers establish persistence by adding unauthorized MFA methods. They then conduct extensive reconnaissance using Microsoft Graph API to map users, groups, permissions, and resources. The intrusion culminates in high-volume data collection from SharePoint, OneDrive, and Exchange using automated tools, with exfiltration occurring over hours or days at controlled rates to avoid detection.

Arctic Wolf Labs has been tracking multiple campaigns built around CastleLoader, a multi-stage shellcode loader that has evolved significantly. Three distinct campaigns were identified: Urutyka, Garrigin, and Noidret. The most significant development is the integration of NeedleStealer framework payloads, marking the first observed use of Rust and Golang tooling in this campaign cluster. NeedleStealer includes a Rust-based desktop cryptocurrency wallet spoofer targeting Ledger, Trezor, and Exodus wallets, and a Golang-based malicious browser extension installer. The campaigns utilize obfuscated PowerShell stagers, IronPython runtimes, and NodeJS-based shellcode injectors. Infrastructure analysis revealed consistent naming patterns, staged domains for future operations, and the use of fraudulently obtained code-signing certificates. The campaigns consistently deploy NetSupport RAT and CastleStealer alongside the new NeedleStealer payloads, suggesting an expansion toward high-value cryptocurrency targeting.

HighVulnerabilityUnited StatesCanada#cve#cve-2026-0257#cwe-565

A sophisticated adversary-in-the-middle phishing campaign is targeting universities, enterprises, and multinational institutions including EU and UN agencies. Active since May 2026, the operation leverages compromised organizational email accounts to distribute procurement-themed lures that mimic requests for information, bid invitations, and project documentation. Victims are redirected through fake document portals, CAPTCHA verification stages, and cloned authentication pages impersonating Microsoft, OpenGov, and financial institutions. The attacker rotates between multiple AiTM phishing kits including EvilProxy, FlowerStorm, and Kali365 to intercept MFA-protected sessions in real time, capturing session tokens and cookies to establish authenticated access. Rather than using newly registered domains, the actor compromises aged domains that have been dormant for years, injecting PHP files to host phishing infrastructure and evade detection through domain reputation systems.

The threat group ShinyHunters has adopted a new tactic of subdomain impersonation for initial access, moving away from newly registered lookalike domains. They are utilizing mobile-first lures and outsourcing spam services to scale their operations. The group is likely reusing previously stolen CRM and ERP data to drive social engineering attacks. Their approach involves phone-guided adversary-in-the-middle phishing to capture credentials and authenticated sessions. ShinyHunters is also scaling vishing operations through paid contractors and specialized harassment services. This evolution in tactics allows for rapid identity-to-SaaS compromise without deploying malware, making traditional domain-based monitoring less effective.

MediumCampaignUnited StatesUnited KingdomCanada+7#saas compromise#crm data abuse#session hijacking