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 …

Impair Defenses: Indicator Blocking

Defense Evasion [Mitre]

An adversary may attempt to block indicators or events typically captured by sensors from being gathered and analyzed. This could include maliciously redirecting or even disabling host-based sensors, such as Event Tracing for Windows (ETW), by tampering settings that control the collection and flow of event telemetry. These settings may be stored on the system in configuration files and/or in …

Impair Defenses: Downgrade Attack

Defense Evasion [Mitre]

Adversaries may downgrade or use a version of system features that may be outdated, vulnerable, and/or does not support updated security controls such as logging. For example, PowerShell versions 5+ includes Script Block Logging (SBL) which can record executed script content. However, adversaries may attempt to execute a previous version of PowerShell that does not support SBL with the intent …

Indicator Removal: File Deletion

Defense Evasion [Mitre]

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 system by an adversary (ex: Ingress Tool Transfer) may leave traces to indicate to what was done within a network and how. Removal of these files can occur during an intrusion, or as part of a …

Indicator Removal: Network Share Connection Removal

Defense Evasion [Mitre]

Adversaries may remove share connections that are no longer useful in order to clean up traces of their operation. Windows shared drive and SMB/Windows Admin Shares connections can be removed when no longer needed. Net is an example utility that can be used to remove network share connections with the net use \system\share /delete command.

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: Right-to-Left Override

Defense Evasion [Mitre]

Adversaries may abuse the right-to-left override (RTLO or RLO) character (U+202E) to disguise a string and/or file name to make it appear benign. RTLO is a non-printing Unicode character that causes the text that follows it to be displayed in reverse. For example, a Windows screensaver executable named March 25 \u202Excod.scr will display as March 25 rcs.docx. A JavaScript file …

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 …

Masquerading: Double File Extension

Defense Evasion [Mitre]

Adversaries may abuse a double extension in the filename as a means of masquerading the true file type. A file name may include a secondary file type extension that may cause only the first extension to be displayed (ex: File.txt.exe may render in some views as just File.txt). However, the second extension is the true file type that determines how …

Modify Authentication Process

Defense Evasion [Mitre]

Adversaries may modify authentication mechanisms and processes to access user credentials or enable otherwise unwarranted access to accounts. The authentication process is handled by mechanisms, such as the Local Security Authentication Server (LSASS) process and the Security Accounts Manager (SAM) on Windows, responsible for gathering, storing, and validating credentials. By modifying an authentication process, an adversary may be able to …

Search For Content

Search Result

Impair Defenses: Disable Windows Event Logging

Defense Evasion [Mitre]

Impair Defenses: Indicator Blocking

Defense Evasion [Mitre]

Impair Defenses: Downgrade Attack

Defense Evasion [Mitre]

Indicator Removal: File Deletion

Defense Evasion [Mitre]

Indicator Removal: Network Share Connection Removal

Defense Evasion [Mitre]

Indicator Removal: Clear Mailbox Data

Defense Evasion [Mitre]

Masquerading: Right-to-Left Override

Defense Evasion [Mitre]

Masquerading: Masquerade Task or Service

Defense Evasion [Mitre]

Masquerading: Double File Extension

Defense Evasion [Mitre]

Modify Authentication Process

Defense Evasion [Mitre]