Links submitted by the Threat Radar community and AI curated for defenders.

Community Curated

NCSC UK

JVN Japan

GCP Compute Engine Security

GCP Kubernetes Security

AWS Security Bulletins

CERT/CC

Tenable Research

Google Project Zero

Microsoft Security Blog

Cisco Talos

Zero Day Initiative

Palo Alto Unit 42

Krebs on Security

Kaspersky Security Blog

Check Point Research

CVE Database V5

GCVE Database

AlienVault OTX General

Real-world exploitation and exposure telemetry from the OffSeq Mirage honeypot fleet and Sonar internet scans — which CVEs attackers are actually exploiting and which are exposed in the wild, plus attacker IoCs. All IPs are masked; no raw victim or sensor identity is ever published.

OffSeq Mirage

Bleeping Computer

SANS ISC Handlers Diary

SecurityWeek

Threatpost

Reddit ExploitDev

Latest exploits, shellcode, and vulnerability proofs-of-concept from Exploit-DB

Exploit-DB RSS Feed

Reddit BlueTeam

Reddit ThreatIntel

Reddit Malware

Reddit Reverse Engineering

Reddit Cybersecurity

Reddit NetSec

ThreatFox MISP Feed

CIRCL OSINT Feed

Reddit InfoSec News

The Hacker News

Dark Reading

AlienVault OTX Vulnerabilities

AlienVault OTX Malware

A sophisticated phishing campaign targeting Japanese users employs MostereRAT, a Remote Access Trojan that utilizes advanced evasion techniques. The attack chain involves multiple stages, including an Easy Programming Language (EPL) payload, security tool disabling, and mTLS-secured C2 communications. The malware can deploy popular remote access tools like AnyDesk and TightVNC, granting attackers full system control. It employs techniques such as running as TrustedInstaller, blocking AV traffic, and creating hidden administrator accounts. The campaign's complexity and use of legitimate tools make detection and prevention challenging, highlighting the importance of user education and up-to-date security solutions.

MostereRAT is a sophisticated Remote Access Trojan (RAT) actively deployed via a targeted phishing campaign primarily affecting Japanese users. The attack chain is multi-staged and complex, beginning with the delivery of an Easy Programming Language (EPL) payload, which is a less common scripting language that helps evade traditional detection mechanisms. Once executed, the malware employs advanced evasion techniques such as running with the TrustedInstaller account privileges, which is the highest Windows system privilege, allowing it to bypass many security controls and maintain persistence. It also disables security tools and blocks antivirus traffic, further complicating detection and mitigation efforts. Communication with its command and control (C2) servers is secured using mutual TLS (mTLS), ensuring encrypted and authenticated data exchange that hinders network-based detection. MostereRAT can deploy legitimate remote access tools like AnyDesk and TightVNC, which are commonly used for remote support but here are weaponized to grant attackers covert full system control. Additional tactics include creating hidden administrator accounts and using various Windows persistence and execution techniques (such as T1113, T1543, T1053, T1562, T1219, T1055, T1218, T1112, T1059, T1566, T1574, T1027, T1546, T1573, T1056, T1588, T1134, T1136) to maintain long-term access and evade detection. The use of legitimate tools and high privilege escalation makes this threat particularly stealthy and difficult to detect using conventional endpoint detection and response (EDR) solutions. The campaign’s complexity and the use of phishing as the initial infection vector highlight the critical importance of user awareness and robust email security controls.

Detailed information about MostereRAT Deployed AnyDesk/TightVNC for Covert Full Access. Get real-time updates, technical details, and mitigation strategies.

MostereRAT Deployed AnyDesk/TightVNC for Covert Full Access - Live Threat Intelligence - Threat Radar | OffSeq.com

MostereRAT Deployed AnyDesk/TightVNC for Covert Full Access

Threats Tagged 'mtls'

Stop chasing alerts. Route them.

Check if your credentials are on the dark web

Filter Threats

Threats Tagged 'mtls'

Lead Pen Test Professional