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Adversaries may communicate using OSI application layer protocols to avoid detection/network filtering by blending in with existing traffic. Commands

Adversaries may use scripts automatically executed at boot or logon initialization to establish persistence.(Citation: Mandiant APT29 Eye Spy Email No

Adversaries may clear system logs to hide evidence of an intrusion. macOS and Linux both keep track of system or user-initiated actions via system log

Adversaries may clear system logs to hide evidence of an intrusion. macOS and Linux both keep track of system or user-initiated actions via system log

Adversaries may attempt to make payloads difficult to discover and analyze by delivering files to victims as uncompiled code. Text-based source code f

Adversaries may leverage the compute resources of co-opted systems to complete resource-intensive tasks, which may impact system and/or hosted service

Adversaries may abuse the <code>cron</code> utility to perform task scheduling for initial or recurring execution of malicious code.(Citation: 20 macO

Adversaries may use an existing, legitimate external Web service to host information that points to additional command and control (C2) infrastructure

Adversaries may use [Obfuscated Files or Information](https://attack.mitre.org/techniques/T1027) to hide artifacts of an intrusion from analysis. They

Adversaries may disable or modify host-based or network firewalls to impair defensive mechanisms and enable further action. Once an adversary has gath

Adversaries may disable or modify system firewalls in order to bypass controls limiting network usage. Changes could be disabling the entire mechanism

Adversaries may disable, degrade, or tamper with security tools or applications (e.g., endpoint detection and response (EDR) tools, intrusion detectio

Adversaries may modify and/or disable security tools to avoid possible detection of their malware/tools and activities. This may take many forms, such

Adversaries may execute their own malicious payloads by hijacking environment variables the dynamic linker uses to load shared libraries. During the e

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network. The weakness in the system can be a

Adversaries may delete files left behind by the actions of their intrusion activity. Malware, tools, or other non-native files dropped or created on a

Adversaries may set files and directories to be hidden to evade detection mechanisms. To prevent normal users from accidentally changing special files

Adversaries may transfer tools or other files from an external system into a compromised environment. Tools or files may be copied from an external ad

Adversaries may modify file or directory permissions/attributes to evade access control lists (ACLs) and access protected files.(Citation: Hybrid Anal

Adversaries may match or approximate the name or location of legitimate files, Registry keys, or other resources when naming/placing them. This is don

Adversaries may attempt to get a listing of services running on remote hosts and local network infrastructure devices, including those that may be vul

Adversaries may communicate using a protocol and port pairing that are typically not associated. For example, HTTPS over port 8088(Citation: Symantec

Adversaries may attempt to make an executable or file difficult to discover or analyze by encrypting, encoding, or otherwise obfuscating its contents

Adversaries may inject portable executables (PE) into processes in order to evade process-based defenses as well as possibly elevate privileges. PE in

Adversaries may search for private key certificate files on compromised systems for insecurely stored credentials. Private cryptographic keys and cert

Adversaries may attempt to get information about running processes on a system. Information obtained could be used to gain an understanding of common

Adversaries may abuse Python commands and scripts for execution. Python is a very popular scripting/programming language, with capabilities to perform

Adversaries may achieve persistence by adding a program to a startup folder or referencing it with a Registry run key. Adding an entry to the "run key

Adversaries may attempt to get a listing of other systems by IP address, hostname, or other logical identifier on a network that may be used for Later

Adversaries may use rootkits to hide the presence of programs, files, network connections, services, drivers, and other system components. Rootkits ar