Stay updated on the latest backdoor threats in cybersecurity. Discover news, analysis, and insights on covert access vulnerabilities.
Search across headline titles and summaries.
Background for this topic.
A backdoor is a hidden method within software or hardware that allows bypassing normal authentication to access a system or network. These can be intentionally created by developers for maintenance or debugging but are frequently exploited or implanted by attackers to maintain unauthorized, persistent access. Backdoors often appear as undocumented commands, hidden user accounts, or covert network services designed to evade detection.
In cybersecurity, backdoors enable attackers to circumvent security controls, increasing the risk of prolonged system compromise and data exposure. Detecting backdoors requires careful code review, monitoring for unusual system behavior, and verifying integrity through trusted baselines. Identifying backdoor indicators in malware or attacker infrastructure is critical for limiting unauthorized access and reducing attacker dwell time within networks. Defensive measures focus on eliminating hidden access points and strengthening authentication mechanisms.
Hackers have been spotted using SEO poisoning and search engine advertisements to promote fake Microsoft Teams installers that infect Windows devices with the Oyster backdoor, providing initial access to corporate networks. [...]
Not to be confused with all the other reports of Chinese intruders on US networks that came to light this week RedNovember, a Chinese state-sponsored cyberspy group, targeted government and critical private-sector networks around the globe between June 2024 and July 2025, exploiting buggy internet-facing appliances to deploy a Go-based backdoor called Pantegana and other offensive security tools, including Cobalt Strike and SparkRAT.…
Eset: Lazarus Group Shares Backdoor With Newer Pyongyang Threat ActorA gang of North Korean hackers behind fake IT job recruitment scams now have access to a remote access Trojan favored by their more technically advanced counterparts tracked collectively as the Lazarus Group, say security researchers.
Keeping Pyongyang's coffers full North Korean-linked crews connected to the pervasive IT worker scams have upped their malware game, using more advanced tools, including a backdoor that has much of the same code as Pyongyang's infamous Lazarus Group deploys.…
The China-linked cyber-espionage group UNC5221 is compromising network appliances that cannot run traditional EDR agents to deploy new versions of the "Brickstorm" backdoor.
The North Korea-linked threat actors associated with the Contagious Interview campaign have been attributed to a previously undocumented backdoor called AkdoorTea, along with tools like TsunamiKit and Tropidoor
The hackers are likely trying to collect data to feed the development of zero-day exploits, said Google researchers
Companies in the legal services, software-as-a-service (SaaS) providers, Business Process Outsourcers (BPOs), and technology sectors in the U.S. have been targeted by a suspected China-nexus cyber espionage group to deliver a known backdoor referred to as BRICKSTORM
Hackers tracked as UNC6148 are attacking SonicWall security devices by installing hidden software, allowing them to control systems, steal passwords, and hide their activities.
Iranian Hackers Impersonate Online RecruitersWestern Europeans working in aerospace, defense manufacturing or telecoms are receiving waves of emails from putative job recruiters who actually are Iranian state hackers ready to unleash a backdoor and an infostealer. Check Point tracks the threat actor as "Nimbus Manticore."
Instead of job offers, victims get MiniJunk backdoor and MiniBrowse stealer Suspected Iranian government-backed online attackers have expanded their European cyber ops with fake job portals and new malware targeting organizations in the defense, manufacturing, telecommunications, and aviation sectors.…