Security researchers have detailed a new variant of a dynamic link library (DLL) search order hijacking technique that could be used by threat actors to bypass security mechanisms and achieve execution of malicious code on systems running Microsoft Windows 10 and Windows 11. The approach “leverages executables commonly found in the trusted WinSxS folder and […]
An unspecified government entity in Afghanistan was targeted by a previously undocumented web shell called HrServ in what’s suspected to be an advanced persistent threat (APT) attack. The web shell, a dynamic-link library (DLL) named “hrserv.dll,” exhibits “sophisticated features such as custom encoding methods for client communication and in-memory execution,” Kaspersky security researcher Mert Degirmenci […]
In a striking revelation shaking the cybersecurity world, researchers have unearthed a sophisticated web shell, dubbed ‘HrServ,’ hidden within a seemingly innocuous DLL file, ‘hrserv.dll.’ This discovery, emerging from routine cybersecurity investigations, uncovers a new depth in the sophistication of cyber attacks, challenging existing defense mechanisms. The Alarming Emergence of Web Shells in Cyber Warfare […]
The open-source remote access trojan known as Quasar RAT has been observed leveraging DLL side-loading to fly under the radar and stealthily siphon data from compromised Windows hosts. “This technique capitalizes on the inherent trust these files command within the Windows environment,” Uptycs researchers Tejaswini Sandapolla and Karthickkumar Kathiresan said in a report published last […]
Threat actors used a well-liked piece of corporate communication software from 3CX, according to security experts. In particular, reports state that a desktop client for the 3CX VoIP (Voice over Internet Protocol) service was used to specifically target 3CX’s clients. It is believed that the attack is a multi-part process, with the first stage using […]
A new backdoor associated with a malware downloader named Wslink has been discovered, with the tool likely used by the notorious North Korea-aligned Lazarus Group, new findings reveal. The payload, dubbed WinorDLL64 by ESET, is a fully-featured implant that can exfiltrate, overwrite, and delete files; execute PowerShell commands; and obtain comprehensive information about the underlying […]
Cisco issued a warning of active exploitation attempts targeting two security vulnerabilities in the Cisco AnyConnect Secure Mobility Client for Windows. The security flaws are tracked as CVE-2020-3153 (CVSS score: 6.5) and CVE-2020-3433 (CVSS score: 7.8), which allows the attacker to copy malicious files to arbitrary locations with system-level privileges. Both the vulnerabilities are dated […]
A researcher has detected a critical vulnerability in some of the most common malware and ransomware variants today and whose exploitation would allow interrupting file encryption on infected systems, preventing successful attacks. Among the ransomware strains affected by this flaw are dangerous variants such as AvosLocker, Conti, LockBit, REvil, and the recently detected Black Basta. […]
Dynamic-link library (DLL) side-loading is an increasingly popular cyberattack method that takes advantage of how Microsoft Windows applications handle DLL files. In such attacks, malware places a spoofed malicious DLL file in a Windows’ WinSxS directory so that the operating system loads it instead of the legitimate file. What is DLL side-loading Attack? Generally in […]
Robber is a free open source tool developed using Delphi XE2 without any 3rd party dependencies. What is DLL hijacking ? Windows has a search path for DLLs in its underlying architecture. If you can figure out what DLLs an executable requests without an absolute path (triggering this search process), you can then place your […]
Injects C# EXE or DLL Assembly into any CLR runtime and AppDomain of another process. The injected assembly can then access static instances of the injectee process’s classes and therefore affect it’s internal state. Usageclrinject-cli.exe -p <processId/processName> -a <assemblyFile> Opens process with id <processId> or name <processName>, inject <assemblyFile> EXE and execute Main method. Additional […]
Imagine that you download a program or a software that you have been looking for and have been craving to work on for the longest period of time. When you finally get your hands on it and you launch the application after installing it, a dialogue box flashes an in-your-face kind of message with a […]
Run PowerShell with dlls only. Does not require access to powershell.exe as it uses powershell automation dlls. dll mode: Usage: rundll32 PowerShdll,main <script> rundll32 PowerShdll,main -f <path> Run the script passed as argument rundll32 PowerShdll,main -w Start an interactive console in a new window rundll32 PowerShdll,main -i Start an interactive console in this console If […]
Throughout this blog post we will be detailing a newly discovered RTF document family that is being leveraged by the FIN7 group (also known as the Carbanak gang) which is a financially-motivated group targeting the financial, hospitality, and medical industries. This document is used in phishing campaigns to execute a series of scripting languages containing […]
A password stealing Trojan called AdService is being quietly distributed by adware bundles that typically install other programs such as Russian adware, extensions, clickers, adware, and fake system optimization programs. AdService uses Chrome DLL hijacking to load itself when Chrome is executed so that it can steal information from Facebook and Twitter accounts. AdService Executes via Chrome […]
Tutorials on Windows DLL injections in C have noticable gaps in what they explain. This blog post plus the comments on my implementation should address most questions a newcomer might have. Here’s my code on GitHub. Note that most of my code is directly taken from the Microsoft Developer Network (MSDN). Implementing this was a […]
Like many in the security industry, we’ve been busy investigating the implications of the Shadow Brokers leak, with the DOUBLEPULSAR payload in particular attracting our attention. Like many in the security industry, we have been busy the last few days investigating the implications of the Shadow Brokers leak with regard to attack detection. Whilst there […]
Researchers have crafted a stealthy new way of bypassing Windows User Account Controls (UAC) that opens the door to attacks on targeted systems. According researchers, the bypass technique can fly under the radar of security solutions that monitor for this type of circumvention. The UAC bypass technique works on Windows 10 systems, and as opposed a number […]
While doing some research on the inner workings of Microsofts new Antimalware Scan Interface technology within Windows 10, i found a DLL loading vulnerabilty within PowerShell 5. The reason i did some research is because some offensive PowerShell scripts i use within my own Red Teaming tool called p0wnedShell are getting blocked by Windows Defender […]
No admin privileges are required to run the attack. Clever hackers can bypass Microsoft’s Windows AppLocker security feature by abusing a hidden trait of the Regsvr32 command-line utility that’s normally used to register DLLs on a Windows computer. AppLocker is a security feature introduced with Windows 7 and Windows Server 2008 R2 that helps administrators specify […]
Lottery boss wins $16.5 million in six years by tampering random number generator. According to The Des Moines Register, in a case from last year, new details have been disclosed that tells how the boss of a US lottery used malicious DLLs to manipulate and foretell winning ticket numbers on special days of the year. The […]