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Files from Ryan Hanson

Email addressryan.hanson at optiv.com
First Active2018-12-13
Last Active2019-09-23
BlueKeep RDP Remote Windows Kernel Use-After-Free
Posted Sep 23, 2019
Authored by OJ Reeves, Sean Dillon, Brent Cook, Ryan Hanson | Site metasploit.com

The RDP termdd.sys driver improperly handles binds to internal-only channel MS_T120, allowing a malformed Disconnect Provider Indication message to cause a use-after-free. With a controllable data/size remote nonpaged pool spray, an indirect call gadget of the freed channel is used to achieve arbitrary code execution.

tags | exploit, remote, arbitrary, code execution
advisories | CVE-2019-0708
SHA-256 | 1aecbe52ce929c3de3a4cf90e7b8a03dc74a2a1edd4797fbc7bf61bee611bb3c
WebDAV Server Serving DLL
Posted Dec 13, 2018
Authored by Ryan Hanson, James Cook | Site metasploit.com

This Metasploit module simplifies the rundll32.exe Application Whitelisting Bypass technique. The module creates a webdav server that hosts a dll file. When the user types the provided rundll32 command on a system, rundll32 will load the dll remotely and execute the provided export function. The export function needs to be valid, but the default meterpreter function can be anything. The process does write the dll to C:\Windows\ServiceProfiles\LocalService\AppData\Local\Temp\TfsStore\Tfs_DAV but does not load the dll from that location. This file should be removed after execution. The extension can be anything you'd like, but you don't have to use one. Two files will be written to disk. One named the requested name and one with a dll extension attached.

tags | exploit, local
systems | windows
SHA-256 | ffc4442915ecf93d8cc559e8f07b68a8fa8aa6fc9f12c43ac4f3ae5d931ac495
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