Microsoft 365

Token Theft and AI Poisoning Redefine the Perimeter Attackers are shifting from breaking passwords to stealing active login sessions, bypassing multi-factor authentication entirely. This week, ARToken and ConsentFix exploited Microsoft 365 OAuth flows to hijack accounts, while Anubis ransomware used the ongoing CitrixBleed 2 vulnerability to steal session tokens from network gateways. Even a standard user can become a Global Administrator in minutes if identity settings are loose, as demonstrated by a recent M365 privilege escalation analysis. Simultaneously, artificial intelligence systems have evolved from helper tools to critical vulnerabilities, serving as both the weapon and the target. Threat actors are using AI to generate malware like InfernoGrabber v9.0 and BusySnake Stealer, while also poisoning AI agent ecosystems with malicious skills like OpenClaw and tricking AI models into executing financial fraud via indirect prompt injection. The AI arms race has accelerated breakout times to under 30 minutes, with state-sponsored groups like GTG-1002 now orchestrating entire espionage campaigns via AI. Defenders must immediately audit identity and session controls, treating session tokens as highly sensitive credentials. Security teams should also implement guardrails for AI agents, verifying external URLs and restricting autonomous financial or code execution actions.

2026-07-0112 minCisco Taloshigh

Cisco Talos identified ARToken, a phishing-as-a-service platform linked to EvilTokens, that abuses Microsoft's OAuth 2.0 Device Authorization Grant to bypass MFA and capture victim tokens. The platform provides affiliates with a comprehensive post-compromise toolkit including PRT-based persistence surviving password resets, BEC email operations, inbox rule manipulation, and SharePoint exfiltration. ARToken deploys a sophisticated seven-layer client-side anti-analysis system and abuses legitimate sharepoint.com URLs from attacker-controlled Microsoft 365 workspaces to evade security scanners.

2026-07-019 minHuntresshigh

The article details two evolving social engineering techniques: ClickFix, which tricks users into pasting and executing attacker-supplied PowerShell commands via fake prompts, and ConsentFix, which abuses Microsoft 365 OAuth consent flows by manipulating users into dragging a localhost callback link into the browser to capture session tokens. A complete ConsentFix playbook with working code was publicly shared on a Russian cybercrime forum, enabling widespread adoption. Both techniques bypass traditional security controls by exploiting user muscle memory and legitimate platform infrastructure.

2026-07-0110 minHuntresshigh

Huntress demonstrated that a standard Microsoft 365 user with no admin privileges can be escalated to Global Administrator in under six minutes by exploiting common identity misconfigurations — specifically, an over-privileged service account owning an enterprise application, lack of MFA enforcement, and standard users being permitted to access the Azure portal. Analysis of 12,000+ M365 tenants revealed that over 60% were missing at least half of recommended security controls, with MFA gaps, over-privileged accounts, and admin restriction failures being the most prevalent issues. The article argues that continuous, automated identity posture management is essential because configuration drift creates exploitable windows far shorter than the 24-hour scan cycles of traditional tools.

2026-07-0111 minCheck Pointhigh

This weekly threat intelligence bulletin highlights multiple active exploitation campaigns targeting network infrastructure (Cisco SD-WAN, Ubiquiti UniFi OS, FortiGate firewalls) and AI platforms (Dify, Langflow), alongside supply chain attacks against Polymarket and AI agent ecosystems. Notable emerging threats include EvilTokens phishing-as-a-service abusing device-code authentication for M365 token theft, the FortiBleed campaign converting 430,000+ firewalls into credential stealers, and Turla's StockStay espionage malware targeting Ukrainian entities. Cloud extortion group FulcrumSec and the DCloud Uni-App fraud framework (236,493+ scam domains) represent additional significant threats requiring defensive attention.

Legitimate Tools Hijacked as AI Becomes the New Battleground The most damaging intrusions this week didn't rely on custom malware — they hijacked the legitimate tools and protocols organizations already trust. FortiBleed harvested real credentials from FortiGate firewall configurations worldwide, EvilTokens bypassed multi-factor authentication by abusing Microsoft's own device login flow, and a WhatsApp campaign installed legitimate ManageEngine remote management software to maintain persistent access. Simultaneously, attackers are learning to manipulate the AI systems defenders increasingly depend on. The macOS.Gaslight malware feeds fake error messages to AI analysis tools to blind security analysts, malicious skills on the OpenClaw marketplace trick AI assistants into executing harmful commands, and researchers demonstrated that chatbot reconnaissance can map an organization's defenses through casual conversation. Reset all FortiGate and VPN credentials immediately, scrutinize AI marketplace add-ons before installation, and assume that any legitimate-looking login prompt or remote management tool could be an attacker wearing a trusted disguise.

2026-06-245 minANY.RUNhigh

The EvilTokens phishing kit utilizes browser-side AES-GCM decryption to conceal its malicious payload from static analysis tools. By abusing the Microsoft Device Code authentication flow, the kit tricks victims into authorizing attacker access to their Microsoft 365 accounts without directly harvesting credentials, creating a significant visibility gap for SOC teams.

2026-06-245 minCheck Pointcritical

This threat intelligence report highlights recent data breaches involving third-party vendors, emerging AI threat vectors such as prompt injection and WebSocket abuse, and active exploitation of critical vulnerabilities in Fortinet, Cisco, and Splunk products. Additionally, seasonal phishing campaigns targeting travelers and Amazon Prime members are surging alongside a cross-platform Rust-based crypto clipboard hijacker.

2026-06-155 minVaroniscritical

Varonis Threat Labs discovered SearchLeak, a critical vulnerability chain in Microsoft 365 Copilot Enterprise Search (CVE-2026-42824). By chaining Parameter-to-Prompt (P2P) injection, an HTML rendering race condition, and a Server-Side Request Forgery (SSRF) via Bing's image search, attackers could exfiltrate sensitive organizational data via a single malicious link.

An active Microsoft 365 phishing campaign is abusing the OAuth 2.0 Device Authorization Grant flow to achieve account takeover without stealing passwords. The attack utilizes ClickFix-style landing pages with Unicode obfuscation and tricks victims into authorizing an attacker-controlled device via legitimate Microsoft authentication portals, coordinating the flow via a 4-second beaconing mechanism.

VerdantBamboo, a Chinese threat actor, compromised edge appliances including Egnyte Storage Sync, pfSense firewalls, and Synology NAS devices to deploy custom malware (BRICKSTORM, PLENET, AGENTPSD). The attackers exploited a compromised MSP and local privilege escalation misconfigurations to maintain long-term persistence, using the compromised devices to proxy traffic and bypass Microsoft 365 Conditional Access policies.

2026-06-026 minArctic Wolfhigh

The operators behind the Kali365 Phishing-as-a-Service (PhaaS) kit have expanded their infrastructure to target a wider array of services, including Microsoft 365, Okta, and Russia's MAX Messenger. The threat actors utilize OAuth 2.0 device authorization grant abuse and fake prize-claim lures to bypass MFA and exfiltrate credentials via Telegram.

2026-06-013 minCanadian Centre for Cyber Securitycritical

The Canadian Centre for Cyber Security published a daily digest of nine security advisories covering critical updates for major vendors including Microsoft, IBM, Dell, Ubuntu, Red Hat, Ivanti, and Plesk. Notably, the digest highlights that CVE-2026-41089, a Windows Netlogon Remote Code Execution vulnerability, is actively being exploited in the wild.

2026-05-266 minHuntresshigh

Cybercriminals are shifting from traditional credential theft to session hijacking using infostealer malware, allowing them to bypass multi-factor authentication (MFA). By harvesting and replaying valid session tokens using automated tools, attackers gain rapid, stealthy access to corporate environments, which is then often monetized by Initial Access Brokers.

2026-05-266 minANY.RUNhigh

In May 2026, ANY.RUN observed a surge in sophisticated phishing and malware campaigns utilizing fileless execution, browser-based credential theft, and legitimate workflow abuse. Key threats included Agent Tesla credential harvesting, ClickFix fileless malware, BlobPhish in-memory page generation, and phishing-to-RMM chains bypassing traditional MFA via real-time OTP interception.

2026-05-255 minCheck Pointhigh

This threat intelligence report highlights multiple high-profile breaches, including 7-Eleven and GitHub, alongside the active exploitation of vulnerabilities in Windows Defender, Trend Micro, and Drupal. It also details emerging threats such as the Kali365 phishing kit, AI-driven prompt injection attacks, the Nimbus Manticore IRGC-linked campaign deploying the MiniFast backdoor, and a supply chain attack on Laravel Lang packages.

Russian threat actor UTA0355 is conducting targeted phishing campaigns against foreign policy and government professionals by spoofing European security conferences. The attackers use rapport-building techniques and out-of-band messaging to trick victims into authorizing malicious Microsoft 365 OAuth applications and Device Code workflows, granting unauthorized access to their accounts.

2026-05-247 minANY.RUNhigh

Modern social engineering attacks have evolved to closely mimic legitimate business workflows, utilizing techniques like ClickFix, OAuth device code abuse, and in-browser blob phishing. These tactics bypass traditional security controls and create "gray-zone" alerts that require deep behavioral analysis to determine the true scope of compromise, such as credential theft, token abuse, or RMM deployment.

2026-05-156 minMandianthigh

UNC6671, operating under the BlackFile brand, conducts sophisticated vishing and Adversary-in-the-Middle (AiTM) attacks to bypass MFA and compromise SSO platforms like Microsoft 365 and Okta. Once inside, the group uses automated Python and PowerShell scripts to rapidly exfiltrate sensitive data via APIs, often masking their activity as routine file access events, before launching aggressive extortion campaigns.

2026-05-155 minCrowdStrikehigh

The CrowdStrike 2026 Financial Services Threat Landscape Report highlights a 43% global increase in hands-on-keyboard intrusions against the financial sector. The threat landscape is dominated by eCrime ransomware operations, DPRK-nexus cryptocurrency theft via supply chain compromises, and China-nexus intelligence collection leveraging Operational Relay Box (ORB) networks and DLL search-order hijacking.

2026-05-135 minVaronishigh

Varonis Threat Labs analyzed Bluekit, a comprehensive Phishing-as-a-Service platform that consolidates domain management, site creation, credential harvesting, and session token theft into a single dashboard. Notably, the kit integrates an AI Assistant powered by uncensored LLMs to draft phishing lures and features advanced post-login session hijacking capabilities, including automated cookie dumping and live target monitoring to bypass standard MFA controls.

2026-05-134 minHuntresshigh

Huntress details the operational benefits of unifying EDR and ITDR to combat infostealers and rapid credential abuse. A highlighted incident demonstrates a ClickFix social engineering attack leveraging WebDAV and rundll32.exe to execute a remote payload, which was mitigated by automatically isolating the host and revoking associated Microsoft 365 identity sessions.

2026-05-136 minArctic Wolfhigh

A widespread phishing campaign is leveraging the Kali365 Live Phishing-as-a-Service (PhaaS) platform to execute device code phishing and AiTM attacks. By tricking users into authorizing legitimate Microsoft device login requests, threat actors steal OAuth access and refresh tokens, bypassing traditional credential-based defenses and MFA to gain persistent access to Microsoft 365 environments.

2026-05-135 minESEThigh

ESET researchers uncovered GopherWhisper, a previously undocumented China-aligned APT group targeting a Mongolian governmental entity. The group utilizes a diverse arsenal of custom, primarily Go-based malware that leverages legitimate services like Slack, Discord, and Microsoft Outlook for command and control, blending malicious traffic with normal enterprise communications.

2026-05-135 minANY.RUNhigh

BlobPhish is an evasive credential-phishing campaign that generates fake authentication forms directly in the victim's browser memory using Blob objects. By avoiding traditional HTTP requests and disk writes, it bypasses standard network and file-based detection mechanisms to steal high-value financial and cloud service credentials.

2026-05-135 minMicrosofthigh

Storm-2755 is a financially motivated threat actor targeting Canadian organizations with 'payroll pirate' attacks. By leveraging SEO poisoning and Adversary-in-the-Middle (AiTM) techniques, the actor steals session tokens to bypass legacy MFA, maintains persistence using the Axios HTTP client, and alters direct deposit information to steal employee salaries.

2026-05-135 minANY.RUNhigh

German critical industries are facing coordinated, highly targeted phishing campaigns utilizing Phishing-as-a-Service platforms like EvilProxy and FlowerStorm. These attacks leverage Adversary-in-the-Middle (AitM) techniques to intercept session cookies, effectively bypassing traditional Multi-Factor Authentication (MFA) to compromise Microsoft 365 and Okta accounts.

2026-05-135 minHuntresshigh

The rapid adoption of AI agents like OpenClaw has introduced a new identity threat surface in Microsoft cloud environments. These applications are often granted sweeping tenant-wide permissions, effectively acting as highly privileged service principals that bypass traditional endpoint defenses and could allow attackers to inherit administrative control if the agent is compromised.

2026-05-135 minSekoia.iohigh

EvilTokens is an advanced Phishing-as-a-Service (PhaaS) platform that automates Business Email Compromise (BEC) attacks via Microsoft device code phishing. It uniquely integrates AI models to automatically analyze compromised mailboxes, identify financial targets, and generate context-aware BEC lures, significantly reducing the time and skill required for threat actors to monetize compromised accounts.

2026-05-137 minANY.RUNhigh

March 2026 saw a surge in sophisticated, multi-stage cyber attacks designed to evade early detection. Key threats included OAuth device code phishing (EvilTokens) for M365 account takeover, registry-hidden RAT staging (RUTSSTAGER), macOS backdoors delivered via ClickFix lures, and resilient botnets utilizing Dead Drop Resolvers.

2026-05-137 minSekoia.iohigh

EvilTokens is a newly discovered Phishing-as-a-Service (PhaaS) platform that automates Microsoft device code phishing to facilitate Business Email Compromise (BEC). By tricking victims into authorizing a malicious device via legitimate Microsoft login portals, attackers harvest access and refresh tokens to gain persistent, unauthenticated access to Microsoft 365 environments.

2026-05-136 minHuntresscritical

Threat actors are leveraging the EvilTokens Phishing-as-a-Service platform hosted on Railway.com to conduct large-scale device code phishing campaigns against Microsoft 365 users. By abusing legitimate cloud infrastructure and multi-hop redirect chains, attackers successfully bypass email filtering and MFA to harvest persistent OAuth tokens.

2026-05-135 minCrowdStrikehigh

Following a major law enforcement takedown of its infrastructure on March 4, 2026, the Tycoon2FA Phishing-as-a-Service (PhaaS) platform has quickly reconstituted its operations. The platform continues to enable cybercriminals to bypass multifactor authentication (MFA) using Adversary-in-the-Middle (AiTM) techniques, leading to cloud account takeovers and Business Email Compromise (BEC).

2026-05-137 minMicrosofthigh

Microsoft Threat Intelligence observed a significant increase in tax-themed phishing and malware campaigns targeting individuals and accounting professionals. These campaigns utilize sophisticated social engineering, Phishing-as-a-Service (PhaaS) platforms for credential theft, and abused legitimate Remote Monitoring and Management (RMM) tools to establish persistent remote access.

2026-05-133 minHuntressinfo

Huntress has introduced a new Incident Report Timeline feature for its Managed ITDR platform to combat rapid, identity-driven data exfiltration in cloud environments. This feature provides a chronological narrative of attacker actions and response efforts, enabling faster decision-making and better communication for security teams and MSPs.

2026-05-136 minANY.RUNhigh

Threat actors are increasingly utilizing OAuth Device Code phishing to compromise Microsoft 365 accounts. By tricking victims into entering a verification code on the legitimate Microsoft device login page, attackers can obtain OAuth access and refresh tokens without ever harvesting the user's credentials. This technique bypasses traditional phishing defenses by operating over encrypted channels and legitimate Microsoft infrastructure.

2026-05-135 minMicrosofthigh

Threat actors, particularly North Korean state-sponsored groups, are increasingly operationalizing AI to accelerate cyberattacks. They leverage generative AI for reconnaissance, social engineering, identity fabrication, and malware development, acting as a force multiplier that reduces technical friction while human operators maintain control over objectives.

2026-05-136 minMicrosoftcritical

Tycoon2FA is a widespread Adversary-in-the-Middle (AiTM) Phishing-as-a-Service platform operated by the threat actor Storm-1747. It enables cybercriminals to bypass standard multifactor authentication (MFA) at scale by intercepting session cookies and credentials using spoofed sign-in pages, custom CAPTCHAs, and complex redirect chains.

2026-05-134 minTrend Microhigh

A coordinated international law enforcement and private sector operation successfully disrupted Tycoon 2FA, a prominent Phishing-as-a-Service (PhaaS) platform. The service enabled low-skill attackers to bypass multi-factor authentication (MFA) using adversary-in-the-middle (AitM) techniques to harvest credentials and session cookies, which were subsequently used for BEC and ransomware attacks.