Disabling Antivirus Antivirus/EDR Evasion

Some forms of malware are programmed to disable antivirus software and evade detection by security measures. These malicious programs can use specific commands or techniques to undermine the antivirus software's effectiveness and remain hidden from detection..

Adding antivirus exception Antivirus/EDR Evasion

Another way for a malware is to add an exception into the antivirus.

Redirect Antivirus Website Antivirus/EDR Evasion

To avoid connection to anti malware website, malware can modify the host file to redirect the connexion.

Shortcut Hiding Antivirus/EDR Evasion

Windows shortcut can be used to store code that downloads a malicious file from the internet, or that stores the malicious file directly within the shortcut itself. This can make it difficult for antivirus software to detect the malicious application, as the file is not stored in a typical location on the computer. Additionally, the use of a shortcut can …

File Splitting Antivirus/EDR Evasion

An old trick consists to split the malicious file into different parts and analyse all of them separately with and AV. The chunk where the detection is still being triggered is actually the part of the file that need to change to evade the antivirus software you are targeting.

Inline Hooking Process Manipulating

Inline hooking is a technique used to intercept calls to target functions. It is commonly used by antiviruses, sandboxes, and malware to perform a variety of tasks, such as checking parameters, shimming, logging, spoofing returned data, and filtering calls.

The process of inline hooking involves directly modifying the code within the target function, usually by overwriting the first few …

File Melt Others

File melting is a technique that malware uses to delete itself after it has been installed on a system. This is often done in order to avoid detection by antivirus programs or other security measures. The process of file melting involves overwriting the file with random data, making it impossible to recover the original file or to detect the presence …

DTPacker Packers

DTPacker is a .NET packer or downloader which although seeing considerable variety in the first stage, uses a second stage with a fixed password as part of the decoding.

The main difference between a packer and a downloader is the location of the payload data which is embedded in the former and downloaded in the latter. DTPacker uses both …

Exploitation for Defense Evasion Defense Evasion [Mitre]

Adversaries may exploit a system or application vulnerability to bypass security features. Exploitation of a software vulnerability occurs when an adversary takes advantage of a programming error in a program, service, or within the operating system software or kernel itself to execute adversary-controlled code. Vulnerabilities may exist in defensive security software that can be used to disable or circumvent them.

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Impair Defenses: Disable or Modify Tools Defense Evasion [Mitre]

Adversaries may modify and/or disable security tools to avoid possible detection of their malware/tools and activities. This may take many forms, such as killing security software processes or services, modifying / deleting Registry keys or configuration files so that tools do not operate properly, or other methods to interfere with security tools scanning or reporting information. Adversaries may also disable …

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