Indicator Removal: Clear Windows Event Logs Anti-Forensic Defense Evasion [Mitre]

Event logging is a process that records important software and hardware events from various sources and stores them in a centralized location called an event log. This service is commonly used by applications and operating systems to track and troubleshoot issues, and can be a valuable tool for forensic investigations.

Event logs can provide valuable information about the actions …

Manipulating Debug Logs Anti-Forensic

Using the sed -i command, specific entries in debug logs, such as errors (segfault, SystemError) or trace information (e.g., filenames like main.cc), are surgically removed. This allows attackers to target only incriminating evidence without erasing the entire log file. The process preserves the structure and authenticity of the log while removing key evidence of exploitation or system errors.

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Removing Commands from SELinux Audit Logs Anti-Forensic

SELinux audit logs record all executed commands and policy enforcement actions, including commands like /bin/web, setenforce, mount, and /bin/rm. Using sed -i, attackers delete specific entries from these logs that could reveal the commands they executed. This manipulation ensures that traces of their activity, such as disabling security policies or deleting evidence, are erased from …

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 …

Killing Windows Event Log Anti-Forensic

Killing the Windows Event Log is a technique used by malware to prevent security professionals from detecting and analyzing it. Svchost.exe is a process that manages services on Windows operating systems.

By grouping multiple services into a single process, Svchost.exe conserves computing resources and reduces resource consumption. However, this also means that Svchost.exe manages the Event Log service, which …

Windows Event Log Evasion via Native APIs Anti-Forensic

Attackers can leverage native Windows API calls to install malicious services without generating correlating entries in the event log. Using native APIs to install services instead of the standard API calls allow attackers to bypass security controls and event logging. This technique was utilised by Stuxnet.

Services are typically created through a standard Windows API call CreateServiceA or CreateService …

Domain Fronting Network Evasion Defense Evasion [Mitre]

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 …

Debugger Evasion Defense Evasion [Mitre]

Adversaries may employ various means to detect and avoid debuggers. Debuggers are typically used by defenders to trace and/or analyze the execution of potential malware payloads.

Debugger evasion may include changing behaviors based on the results of the checks for the presence of artifacts indicative of a debugged environment. Similar to Virtualization/Sandbox Evasion, if the adversary detects a debugger, …

Impair Defenses: Disable Windows Event Logging Defense Evasion [Mitre]

Adversaries may disable Windows event logging to limit data that can be leveraged for detections and audits. Windows event logs record user and system activity such as login attempts, process creation, and much more. This data is used by security tools and analysts to generate detections.

The EventLog service maintains event logs from various system components and applications. By …

Indicator Removal: Clear Command History Defense Evasion [Mitre]

In addition to clearing system logs, an adversary may clear the command history of a compromised account to conceal the actions undertaken during an intrusion. Various command interpreters keep track of the commands users type in their terminal so that users can retrace what they've done.

On Windows hosts, PowerShell has two different command history providers: the built-in history …

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