Windows Defender fails to detect and prevent execution of TrojanWin32Powessere.G when leveraging rundll32.exe, leading to an 'Access is denied' error. The bypass was first disclosed in 2022 by passing an extra path traversal with mshtml, which was later mitigated. Subsequently, on Feb 7, 2024, using multiple commas as part of the path allowed bypassing the mitigation until it was fixed. Another trivial bypass was discovered soon after.
The vulnerability in Microsoft Windows PowerShell allows for code execution by bypassing single quote restrictions. By using a combination of semicolon and ampersand characters, a specially crafted filename can trigger arbitrary code execution and evade PS event logging. This can lead to unauthorized file execution and potential security breaches.
Windows Defender usually blocks the execution of TrojanWin32Powessere.G, but a bypass using VBScript and ActiveX engine can allow the execution of malicious commands. By adding arbitrary text as the 2nd mshtml parameter, one can bypass the detection. For example, running rundll32 vbscript:"\\..\\mshtml\\..\\PWN\\..\\mshtml,RunHTMLApplication "+String(CreateObject("Wscript.Shell").Run("calc.exe"),0) can execute commands despite Windows Defender protection.
IBM i Access Client Solutions (ACS) is vulnerable to remote credential theft on Windows workstations with NT LAN Manager (NTLM) enabled. By creating UNC paths in ACS 5250 display terminal configuration files, attackers can point to a malicious server, capturing NTLM hash information when the user opens the file, leading to credential theft.
In 2022, a proof of concept was released to bypass the Backdoor:JS/Relvelshe.A detection in Windows Defender. Although the initial method was mitigated, a new approach involves adding a simple JavaScript try-catch error statement and evaluating the hex string to execute the bypass successfully.
Windows Defender usually prevents the execution of TrojanWin32Powessere.G by leveraging rundll32.exe. However, by using multiple commas in the execution command, the mitigation can be bypassed, allowing successful execution of the trojan.
WyreStorm Apollo VX20 devices before version 1.3.58 are vulnerable to an account enumeration issue where the TELNET service prompts for a password only after a valid username is entered. Attackers who can access the Telnet service can identify valid accounts, potentially leading to brute force attacks on valid accounts.
An issue in WyreStorm Apollo VX20 devices before version 1.3.58 allows remote attackers to access cleartext credentials for the SoftAP Router configuration using an HTTP GET request, leading to unauthorized disclosure of sensitive information.
The vulnerability in Microsoft Windows PowerShell allows for code execution bypassing single quotes using the semicolon ';' and ampersand '&' characters in filenames. By exploiting this flaw, arbitrary code execution can be triggered, and the PowerShell event log can be truncated.
Windows Defender normally detects and prevents the execution of TrojanWin32Powessere.G which leverages rundll32.exe. By using a VBScript and ActiveX engine, attackers can bypass the detection. Running a specific command can allow the execution of arbitrary commands from an attacker. This bypass involves adding arbitrary text to a parameter, such as 'shtml' or 'Lol', to evade Windows Defender detection.
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