Windows jscript!NameTbl::GetValDef Use-After-Free

Windows: use-after-free in jscript!NameTbl::GetValDef CVE-2017-11903 There is a use-after-free vulnerability in jscript.dll. This issue could potentially be exploited through multiple vectors: - An attacker on the local network could exploit this issue by posing as a WPAD Web Proxy Auto-Discovery...

aPAColypse now: Exploiting Windows 10 in a Local Network with WPAD/PAC and JScript

by Ivan Fratric, Thomas Dullien, James Forshaw and Steven Vittitoe Intro Many widely-deployed technologies, viewed through 20/20 hindsight, seem like an odd or unnecessarily risky idea. Engineering decisions in IT are often made with imperfect information and under time pressure, and some odditie...

WSC2 - A WebSocket C2 Tool

WSC2 is a PoC of using the WebSockets and a browser process to serve as a C2 communication channel between an agent, running on the target system, and a controller acting as the actuel C2 server. Background information Check this blog post to get some context and insight on the developpment of th...

Microsoft Internet Explorer 11 jscript!JsErrorToString Use-After-Free Exploit

Microsoft Internet Explorer 11 suffers from a use-after-free vulnerability in jscript!JsErrorToString. Microsoft IE11: use-after-free in jscript!JsErrorToString CVE-2017-11810 There is a use-after-free in jscript.dll library that can be exploited in IE11. jscript.dll is an old JavaScript library...

Microsoft Internet Explorer 11 jscript!JsErrorToString Use-After-Free

Microsoft IE11: use-after-free in jscript!JsErrorToString CVE-2017-11810 There is a use-after-free in jscript.dll library that can be exploited in IE11. jscript.dll is an old JavaScript library that was used in IE 8 and back. However, IE11 can still load it if put into IE8 compatibility mode and ...

Koadic - COM Command & Control Framework (JScript RAT)

Koadic, or COM Command & Control, is a Windows post-exploitation rootkit similar to other penetration testing tools such as Meterpreter and Powershell Empire. The major difference is that Koadic does most of its operations using Windows Script Host a.k.a. JScript/VBScript, with compatibility in t...

Cerber ransomware delivered in format of a different order of Magnitude

As a follow up to our study into the Magnitude exploit kit and its gate which we profiled in a previous blog post, we take a look at an interesting technique used to distribute the Cerber ransomware. Exploit kits are a very effective means of serving malicious payloads and an important aspect is...

Koadic: An Advanced Windows JScript/VBScript RAT!

PenTestIT RSS Feed All of us know that post-exploitation we need some mechanism to maintain access on the target. One of the most common methods is by installing a trojan. I have tried to maintain a list of similar tools on the malware sources page on this blog. Now, there is a new entrant which...

Zusy Malware Installs Via Mouseover – No Clicking Required

Researchers are warning of several recent spam campaigns delivering PowerPoint files that when opened contain a mouseover link that installs a variant of the Zusy malware. The malware is novel because it does not rely on macros, JavaScript or VBA macros to be enabled for the dropper file to...

Microsoft Edge Scripting Engine Memory Corruption (CVE-2017-0236)

A memory corruption vulnerability exists in Microsoft Edge. The Vulnerability is due to the JScript and VBScript engines improperly handling objects in memory in. Successful exploitation of this vulnerability could allow an unauthenticated user to run arbitrary code with the same rights as the...

The vulnerability of the Internet Explorer browser, which allows a hacker to execute arbitrary code

The vulnerability of the JScript and VBScript engines in Internet Explorer arises from the execution of an operation outside the buffer boundaries in memory. Exploiting this vulnerability allows a remote attacker to execute arbitrary code...

VirtualBox 5.0.32 r112930 x64 - Windows Process COM Injection Privilege Escalation Exploit

Exploit for windows platform in category local exploits Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1103 VirtualBox: Windows Process COM Injection EoP Platform: VirtualBox v5.0.32 r112930 x64 Tested on Windows 10 Class: Elevation of Privilege Summary: The process hardening...

Oracle VM VirtualBox 5.0.32 r112930 (x64) - Windows Process COM Injection Privilege Escalation

Oracle VM VirtualBox 5.0.32 r112930 x64 - Windows Process COM Injection Privilege Escalation Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1103 VirtualBox: Windows Process COM Injection EoP Platform: VirtualBox v5.0.32 r112930 x64 Tested on Windows 10 Class: Elevation of...

Oracle VM VirtualBox 5.0.32 r112930 (x64) - Windows Process COM Injection Privilege Escalation

Source: https://bugs.chromium.org/p/project-zero/issues/detail?id=1103 VirtualBox: Windows Process COM Injection EoP Platform: VirtualBox v5.0.32 r112930 x64 Tested on Windows 10 Class: Elevation of Privilege Summary: The process hardening implemented by the VirtualBox driver can be circumvented ...

CVE-2017-0199: Microsoft Office RTF vulnerability using the PoC-vulnerability warning-the black bar safety net

0x01 description From FireFye detect and publish CVE-2017-0199 since, I have been researching this vulnerability in Microsoft officially released the patch, I decided to release this PoC. I use way possible with other researchers using different methods, the use of the method may be little bit...

CVE-2017-0201

A remote code execution vulnerability exists in Internet Explorer in the way that the JScript and VBScript engines render when handling objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user, aka...

Remote code execution

A remote code execution vulnerability exists in Internet Explorer in the way that the JScript and VBScript engines render when handling objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user, aka...

CVE-2017-0201: Improper Restriction of Operations within the Bounds of a Memory Buffer

A remote code execution vulnerability exists in Internet Explorer in the way that the JScript and VBScript engines render when handling objects in memory. The vulnerability could corrupt memory in such a way that an attacker could execute arbitrary code in the context of the current user, aka...

Microsoft Fixes 45 Vulnerabilities with new Security Update Guide – says goodbye to Security Bulletins

Today is the first month since 1998 in which Microsoft stopped releasing security bulletins with the familiar MSxx-xxx format and replaced it with the new security update guide. We talked about this change earlier in a few blog posts and finally today it’s time to say good bye to security bulleti...

Microsoft Patches Three Vulnerabilities Under Attack

Microsoft today patched a zero-day Word vulnerability that has been publicly attacked along with deploying fixes for Internet Explorer, Microsoft Edge and Windows 10. In all, nine Microsoft products received updates totaling 45 unique CVEs. Three of the vulnerabilities among Tuesday’s updates,...