Tag: backdoor
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Kimsuky Debuts HTTPTroy Backdoor Against South Korea Users
The well-known North Korean threat group continues to improve the obfuscation and anti-analysis features of its attack toolchain. First seen on darkreading.com Jump to article: www.darkreading.com/vulnerabilities-threats/kimsuky-httptroy-backdoor-south-korea-users
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SesameOp Backdoor Abused OpenAI Assistants API for Remote Access
Microsoft researchers found the SesameOp backdoor using OpenAI’s Assistants API for remote access, data theft, and command communication. First seen on hackread.com Jump to article: hackread.com/sesameop-backdoor-openai-assistants-api-access/
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SesameOp: New backdoor exploits OpenAI API for covert C2
Microsoft found a new backdoor, SesameOp, using the OpenAI Assistants API for stealthy command-and-control in hacked systems. Microsoft uncovered a new backdoor, named SesameOp, that abuses the OpenAI Assistants API for command-and-control, allowing covert communication within compromised systems. Microsoft Incident Response Detection and Response Team (DART) researchers discovered the backdoor in July 2025 while […]…
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Hackers Hijack OpenAI API in Stealthy New Backdoor Attack
Hackers created a stealthy backdoor that exploits OpenAI’s API for covert command-and-control operations. First seen on esecurityplanet.com Jump to article: www.esecurityplanet.com/threats/hackers-hijack-openai-api-in-stealthy-new-backdoor-attack/
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SesameOp Backdoor Uses OpenAI API for Covert C2
Malware used in a months-long attack demonstrates how bad actors are misusing generative AI services in unique and stealthy ways. First seen on darkreading.com Jump to article: www.darkreading.com/cyberattacks-data-breaches/sesameop-backdoor-openai-api-covert-c2
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OpenAI Assistants API Exploited in ‘SesameOp’ Backdoor
Instead of relying on more traditional methods, the backdoor exploits OpenAI’s Assistants API for command-and-control communications First seen on infosecurity-magazine.com Jump to article: www.infosecurity-magazine.com/news/openai-assistants-api-sesameop/
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OpenAI API moonlights as malware HQ in Microsoft’s latest discovery
Redmond uncovers SesameOp, a backdoor hiding its tracks by using OpenAI’s Assistants API as a command channel First seen on theregister.com Jump to article: www.theregister.com/2025/11/04/openai_api_moonlights_as_malware/
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OpenAI API moonlights as malware HQ in Microsoft’s latest discovery
Redmond uncovers SesameOp, a backdoor hiding its tracks by using OpenAI’s Assistants API as a command channel First seen on theregister.com Jump to article: www.theregister.com/2025/11/04/openai_api_moonlights_as_malware/
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OpenAI API moonlights as malware HQ in Microsoft’s latest discovery
Redmond uncovers SesameOp, a backdoor hiding its tracks by using OpenAI’s Assistants API as a command channel First seen on theregister.com Jump to article: www.theregister.com/2025/11/04/openai_api_moonlights_as_malware/
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Operation SkyCloak Deploys Tor-Enabled OpenSSH Backdoor Targeting Defense Sectors
Threat actors are leveraging weaponized attachments distributed via phishing emails to deliver malware likely targeting the defense sector in Russia and Belarus.According to multiple reports from Cyble and Seqrite Labs, the campaign is designed to deploy a persistent backdoor on compromised hosts that uses OpenSSH in conjunction with a customized Tor hidden service that employs…
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Operation SkyCloak Deploys Tor-Enabled OpenSSH Backdoor Targeting Defense Sectors
Threat actors are leveraging weaponized attachments distributed via phishing emails to deliver malware likely targeting the defense sector in Russia and Belarus.According to multiple reports from Cyble and Seqrite Labs, the campaign is designed to deploy a persistent backdoor on compromised hosts that uses OpenSSH in conjunction with a customized Tor hidden service that employs…
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New backdoor ‘SesameOp’ abuses OpenAI Assistants API for stealthy C2 operations
Lessons for defenders and platform providers: Microsoft clarified that OpenAI’s platform itself wasn’t breached or exploited; rather, its legitimate API functions were misused as a relay channel, highlighting a growing risk as generative AI becomes part of enterprise and development workflows. Attackers can now co-opt public AI endpoints to mask malicious intent, making detection significantly…
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New backdoor ‘SesameOp’ abuses OpenAI Assistants API for stealthy C2 operations
Lessons for defenders and platform providers: Microsoft clarified that OpenAI’s platform itself wasn’t breached or exploited; rather, its legitimate API functions were misused as a relay channel, highlighting a growing risk as generative AI becomes part of enterprise and development workflows. Attackers can now co-opt public AI endpoints to mask malicious intent, making detection significantly…
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New backdoor ‘SesameOp’ abuses OpenAI Assistants API for stealthy C2 operations
Lessons for defenders and platform providers: Microsoft clarified that OpenAI’s platform itself wasn’t breached or exploited; rather, its legitimate API functions were misused as a relay channel, highlighting a growing risk as generative AI becomes part of enterprise and development workflows. Attackers can now co-opt public AI endpoints to mask malicious intent, making detection significantly…
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Ransomware-Bande missbraucht Microsoft-Zertifikate
Kontinuierlich offenstehende Hintertüren sind für Cyberkriminelle ein Freifahrtschein.Die Ransomware-Bande Rhysida ist speziell im Unternehmensumfeld berüchtigt. Nun scheint das kriminelle Hacker-Kollektiv neue Wege einschlagen zu wollen, wie ein Bericht des US-Sicherheitsanbieters Expel nahelegt. Demnach setzen die Cyberkriminellen in ihrer aktuellen Angriffskampagne initial auf Malvertising. Die maliziösen Anzeigen laufen über die Microsoft-Suchmaschine Bing und führen auf Fake-Download-Seiten…
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Ransomware-Bande missbraucht Microsoft-Zertifikate
Kontinuierlich offenstehende Hintertüren sind für Cyberkriminelle ein Freifahrtschein.Die Ransomware-Bande Rhysida ist speziell im Unternehmensumfeld berüchtigt. Nun scheint das kriminelle Hacker-Kollektiv neue Wege einschlagen zu wollen, wie ein Bericht des US-Sicherheitsanbieters Expel nahelegt. Demnach setzen die Cyberkriminellen in ihrer aktuellen Angriffskampagne initial auf Malvertising. Die maliziösen Anzeigen laufen über die Microsoft-Suchmaschine Bing und führen auf Fake-Download-Seiten…
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Ransomware-Bande missbraucht Microsoft-Zertifikate
Kontinuierlich offenstehende Hintertüren sind für Cyberkriminelle ein Freifahrtschein.Die Ransomware-Bande Rhysida ist speziell im Unternehmensumfeld berüchtigt. Nun scheint das kriminelle Hacker-Kollektiv neue Wege einschlagen zu wollen, wie ein Bericht des US-Sicherheitsanbieters Expel nahelegt. Demnach setzen die Cyberkriminellen in ihrer aktuellen Angriffskampagne initial auf Malvertising. Die maliziösen Anzeigen laufen über die Microsoft-Suchmaschine Bing und führen auf Fake-Download-Seiten…
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China’s president Xi Jinping jokes about backdoors in Xiaomi smartphones
South Korea’s president laughed, so perhaps it was funny? Unlike China’s censorship and snooping First seen on theregister.com Jump to article: www.theregister.com/2025/11/04/chinas_president_xi_jinping_jokes/
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SesameOp: Using the OpenAI Assistants API for Covert C2 Communication
Microsoft’s Detection and Response Team has exposed a sophisticated backdoor malware that exploits the OpenAI Assistants API as an unconventional command-and-control communication channel. Named SesameOp, this threat demonstrates how adversaries are rapidly adapting to leverage legitimate cloud services for malicious purposes, making detection significantly more challenging for security teams. The discovery highlights the evolving tactics…
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Microsoft Detects “SesameOp” Backdoor Using OpenAI’s API as a Stealth Command Channel
Microsoft has disclosed details of a novel backdoor dubbed SesameOp that uses OpenAI Assistants Application Programming Interface (API) for command-and-control (C2) communications.”Instead of relying on more traditional methods, the threat actor behind this backdoor abuses OpenAI as a C2 channel as a way to stealthily communicate and orchestrate malicious activities within the compromised First seen…
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Fake Solidity VSCode extension on Open VSX backdoors developers
A remote access trojan dubbed SleepyDuck, and disguised as the well-known Solidity extension in the Open VSX open-source registry, uses an Ethereum smart contract to establish a communication channel with the attacker. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/fake-solidity-vscode-extension-on-open-vsx-backdoors-developers/
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SesameOp malware abuses OpenAI Assistants API in attacks
Microsoft security researchers have discovered a new backdoor malware that uses the OpenAI Assistants API as a covert command-and-control channel. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/microsoft-sesameop-malware-abuses-openai-assistants-api-in-attacks/
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SesameOp malware abuses OpenAI Assistants API in attacks
Microsoft security researchers have discovered a new backdoor malware that uses the OpenAI Assistants API as a covert command-and-control channel. First seen on bleepingcomputer.com Jump to article: www.bleepingcomputer.com/news/security/microsoft-sesameop-malware-abuses-openai-assistants-api-in-attacks/
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New HttpTroy Backdoor Poses as VPN Invoice in Targeted Cyberattack on South Korea
Tags: attack, backdoor, cyberattack, email, korea, north-korea, phishing, spear-phishing, threat, vpnThe North Korea-linked threat actor known as Kimsuky has distributed a previously undocumented backdoor codenamed HttpTroy as part of a likely spear-phishing attack targeting a single victim in South Korea.Gen Digital, which disclosed details of the activity, did not reveal any details on when the incident occurred, but noted that the phishing email contained a…
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Cyble Detects Advanced Backdoor Targeting Defense Systems via Belarus Military Lure
Cyble Research and Intelligence Labs (CRIL) have uncovered a cyber-espionage operation that used a weaponized ZIP archive to infiltrate defense-sector systems. The malicious file”, disguised as a Belarusian military document titled “ТЛГ на убытие на переподготовку.pdf” (“TLG for departure for retraining.pdf”)”, delivered a highly advanced backdoor capable of establishing covert access through SSH and Tor. First seen on thecyberexpress.com Jump to article: thecyberexpress.com/belarus-military-hit-by-ssh-tor-backdoor/
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Cyble Detects Advanced Backdoor Targeting Defense Systems via Belarus Military Lure
Cyble Research and Intelligence Labs (CRIL) have uncovered a cyber-espionage operation that used a weaponized ZIP archive to infiltrate defense-sector systems. The malicious file”, disguised as a Belarusian military document titled “ТЛГ на убытие на переподготовку.pdf” (“TLG for departure for retraining.pdf”)”, delivered a highly advanced backdoor capable of establishing covert access through SSH and Tor. First seen on thecyberexpress.com Jump to article: thecyberexpress.com/belarus-military-hit-by-ssh-tor-backdoor/
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Operation SkyCloak Targets Russian/Belarusian Military With LNK Exploit and OpenSSH Over Tor Backdoor
The post Operation SkyCloak Targets Russian/Belarusian Military With LNK Exploit and OpenSSH Over Tor Backdoor appeared first on Daily CyberSecurity. First seen on securityonline.info Jump to article: securityonline.info/operation-skycloak-targets-russian-belarusian-military-with-lnk-exploit-and-openssh-over-tor-backdoor/