Search Evasion Techniques
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Hijack Execution Flow: Services Registry Permissions Weakness Defense Evasion [Mitre]
Adversaries may execute their own malicious payloads by hijacking the Registry entries used by services. Adversaries may use flaws in the permissions for Registry keys related to services to redirect from the originally specified executable to one that they control, in order to launch their own code when a service starts. Windows stores local service configuration information in the Registry …
Indicator Removal: Clear Mailbox Data Defense Evasion [Mitre]
Adversaries may modify mail application data to remove evidence of their activity. Email applications allow users and other programs to export and delete mailbox data via command line tools or use of APIs. Mail application data can be emails or logs generated by the application or operating system, such as export requests.
Adversaries may manipulate email mailbox data to …
Masquerading: Masquerade Task or Service Defense Evasion [Mitre]
Adversaries may attempt to manipulate the name of a task or service to make it appear legitimate or benign. Tasks/services executed by the Task Scheduler or systemd will typically be given a name and/or description. Windows services will have a service name as well as a display name. Many benign tasks and services exist that have commonly associated names. Adversaries …
Virtualization/Sandbox Evasion: Time Based Evasion Defense Evasion [Mitre]
Adversaries may employ various time-based methods to detect and avoid virtualization and analysis environments. This may include enumerating time-based properties, such as uptime or the system clock, as well as the use of timers or other triggers to avoid a virtual machine environment (VME) or sandbox, specifically those that are automated or only operate for a limited amount of time.
…Right-to-Left Override (RLO) Extension Spoofing Others
The Right-to-Left Override (RLO) character (U+202E) is a Unicode control character used for bidirectional text formatting. It affects the way text is displayed, causing text following the RLO character to be rendered from right to left, which is typically used in languages like Arabic and Hebrew.
However, malicious actors have found a way to exploit this Unicode …