TEAM VIEWER SILENT INSTALL PATCH

In their attacks, Praying Mantis used a Checkbox Survey RCE Exploit (CVE-2021-27852), a VIEWSTATE Deserialization and Altserialization Insecure Deserialization exploits, and a Telerik-UI Exploit (CVE-2019-18935, CVE-2017-11317). The most recent example is an advanced persistent threat (APT) group tracked as Praying Mantis or TG1021, which targeted Microsoft IIS web servers according to an August report from Israeli security firm Sygnia. However, state-sponsored level threat actors have also leveraged various other exploits to compromise internet-facing IIS servers in the past. I've built a PoC for CVE-2021-31166 the 'HTTP Protocol Stack Remote Code Execution Vulnerability': /yzgUs2CQO5

There hasn't been any malicious activity abusing this flaw in the wild since then and, as we reported at the time, most potential targets were likely safe from attacks given that home users with the latest Windows 10 versions would've updated and companies don't commonly use the latest Window Server versions.

TEAM VIEWER SILENT INSTALL PATCH

Microsoft patched the security flaw (tracked as CVE-2021-31166) during the May Patch Tuesday and said it only impacts Windows 10 versions 2004/20H2 and Windows Server versions 2004/20H2. While the method used by the attackers to compromise IIS servers is not yet known, attackers can use various ways to breach a Windows IIS serverr.ДЇor instance, exploit code targeting a critical wormable vulnerability found in the HTTP Protocol Stack (HTTP.sys) used by the Windows IIS web server has been publicly available since May.

TeamViewerВ installed by TVRAT IIS servers: vulnerable and targeted

Team viewer silent install