IIS

Pierluigi Paganini May 25, 2023
North Korea-linked Lazarus APT targets Microsoft IIS servers to deploy malware

North Korea-linked APT group Lazarus actor has been targeting vulnerable Microsoft IIS servers to deploy malware. AhnLab Security Emergency response Center (ASEC) researchers reported that the Lazarus APT Group is targeting vulnerable versions of Microsoft IIS servers in a recent wave of malware-based attacks. Once discovered a vulnerable ISS server, the attackers leverage the DLL side-loading […]

Pierluigi Paganini February 19, 2023
Frebniis malware abuses Microsoft IIS feature to create a backdoor

Experts spotted a malware dubbed Frebniis that abuses a Microsoft IIS feature to deploy a backdoor and monitor all HTTP traffic to the system. Broadcom Symantec researchers have spotted a new malware, tracked as Frebniis, that abuses Microsoft Internet Information Services (IIS) to deploy a backdoor and monitor all HTTP traffic to the infected system, […]

Pierluigi Paganini July 01, 2022
SessionManager Backdoor employed in attacks on Microsoft IIS servers worldwide

Researchers warn of a new ‘SessionManager’ Backdoor that was employed in attacks targeting Microsoft IIS Servers since March 2021. Researchers from Kaspersky Lab have discovered a new ‘SessionManager’ Backdoor that was employed in attacks targeting Microsoft IIS Servers since March 2021. “In early 2022, we investigated one such IIS backdoor: SessionManager. In late April 2022, […]

Pierluigi Paganini February 22, 2019
Expert found a DoS flaw in Windows Servers running IIS

Windows servers running Internet Information Services (IIS) are vulnerable to denial-of-service (DoS) attacks carried out through malicious HTTP/2 requests. Microsoft revealed that Windows servers running Internet Information Services (IIS) are vulnerable to denial-of-service (DoS) attacks. Attackers can trigger a DoS condition by sending specially crafted HTTP/2 requests, the CPU usage will temporarily spike to 100% […]