Search Evasion Techniques
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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..
Geofencing Others
Geofencing in malware refers to a technique used by cybercriminals to restrict the distribution or activation of malicious software based on geographical location. Malware authors use geofencing to target specific regions or avoid certain areas, such as their home country, in order to evade detection, minimize the chances of being investigated, or maximize the effectiveness of their attacks.
Geofencing …
Impair Defenses: Impair Command History Logging Defense Evasion [Mitre]
Adversaries may impair command history logging to hide commands they run on a compromised system. Various command interpreters keep track of the commands users type in their terminal so that users can retrace what they've done.
Pre-OS Boot: Component Firmware Defense Evasion [Mitre]
Adversaries may modify component firmware to persist on systems. Some adversaries may employ sophisticated means to compromise computer components and install malicious firmware that will execute adversary code outside of the operating system and main system firmware or BIOS. This technique may be similar to System Firmware but conducted upon other system components/devices that may not have the same capability …
Retrieve HDD Information Sandbox Evasion
Malware can figure out if it's in a virtual environment by checking hard drive info. It looks for specific details like serial and model numbers. This is easier to spot in VirtualBox because it shows clues that it's running in a virtual space.
Malware uses this trick to avoid getting caught. It does this by using a special command …
Detecting Virtual Environment Artefacts Sandbox Evasion
Qemu registers some artifacts into the registry. A malware can detect the Qemu installation with a look at the registry key HARDWARE\\DEVICEMAP\\Scsi\\Scsi Port 0\\Scsi Bus 0\\Target Id 0\\Logical Unit Id 0 with the value of Identifier and the data of QEMU or HARDWARE\\Description\\System with a value of SystemBiosVersion and data of QEMU.
The VirtualBox Guest addition leaves many …
Domain Generation Algorithm Network Evasion
Domain generation algorithms (DGAs) are algorithms used by malware to generate a large number of domain names that can be used as communication channels with their command and control servers. These domain names are generated periodically, typically using a pseudorandom number generator.
The use of DGAs makes it difficult for law enforcement and other security actors to shut down …
Execution Guardrails: Environmental Keying Defense Evasion [Mitre]
Adversaries may environmentally key payloads or other features of malware to evade defenses and constraint execution to a specific target environment. Environmental keying uses cryptography to constrain execution or actions based on adversary supplied environment specific conditions that are expected to be present on the target. Environmental keying is an implementation of Execution Guardrails that utilizes cryptographic techniques for deriving …
Alternate EXE Packer Packers
EXE Packer is able to compress executable files (type EXE) or DLL-files. Already compressed files may also be decompressed with this program. There exist 12 different levels for file-compression. This program is also able to create backups of the files that shall be compressed.
If a file is compressed the physical file-size is reduced on the respective device. A …
Modify Authentication Process: Hybrid Identity Defense Evasion [Mitre]
Adversaries may patch, modify, or otherwise backdoor cloud authentication processes that are tied to on-premises user identities in order to bypass typical authentication mechanisms, access credentials, and enable persistent access to accounts.
Many organizations maintain hybrid user and device identities that are shared between on-premises and cloud-based environments. These can be maintained in a number of ways. For example, …