Search Evasion Techniques
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Homograph Attack (Punycode) Network Evasion
A homograph attack is a type of phishing attack that uses homoglyphs (characters that look similar to other characters) to create domain names or URLs that appear to be legitimate, but are actually controlled by an attacker. Homograph attacks take advantage of the fact that many languages have characters that are visually similar to characters used in other languages.
For …
Checking Pipe Sandbox Evasion
Cuckoo is a malware analysis system that uses a named pipe, called \.\pipe\cuckoo, for communication between the host system (where the malware is being analyzed) and the guest system (where the malware is running).
A malware that is running on the guest system can detect the presence of a virtual environment by attempting to access the \.\pipe\cuckoo named pipe. If …
Domain Fronting Defense Evasion [Mitre] Network Evasion
Domain fronting is a technique used to hide the true destination of internet traffic. It may be used to hide the real destination of an offensive payload or is could be used to bypass censorship or any form of network restriction. The technique may be used through CDN infrastructure or on any infrastructure that perform separation between SSL and http …
Mark-Of-The-Web (MOTW) Bypass Antivirus Evasion
Mark-of-the-Web (MOTW) is a security feature originally introduced by Internet Explorer. When downloading a file, Internet Explorer creates an ADS named Zone.Identifier and adds a ZoneId to this stream to indicate from which zone the file originates. It is used on Windows OS to trigger a Windows Defender SmartScreen detection and raise an alert to the user about the file. …
DNS API Injection Process Manipulating
DNS API injection is a technique used by malware to evade detection by intercepting and modifying DNS (Domain Name System) requests made by a host system. The technique involves injecting code into the DNS API (Application Programming Interface) of the host system, which is a set of functions and protocols that allow communication with the DNS service. By injecting code …
INT 0x2D Anti-Debugging
When the instruction INT2D is executed, the exception EXCEPTION_BREAKPOINT is raised. Windows uses the EIP register as an exception address and then increments the EIP register value. Windows also examines the value of the EAX register while INT2D is executed.
Detecting Hostname, Username Sandbox Evasion
Most sandbox are using name like Sandbox, Cuckoo, Maltest, Malware, malsand, ClonePC.... All this hostname can provide the information to the malware. The username can also be checked by malware.