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 …

Hiding Mechanisms Others

Malware often uses various techniques to hide its presence on a system and avoid detection. One common method is to modify or create entries in the system registry, which is a database of configuration settings for the operating system and installed applications. By modifying these settings, malware can hide itself from security software or other programs that might detect its …

Fast Flux Network Evasion

Fast flux is a technique used by botnets to conceal the location of their phishing and malware delivery sites by using a constantly changing network of compromised hosts as proxies. This makes it difficult for law enforcement and other security actors to track down and shut down the sites, as the IP addresses of the sites are constantly changing.

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Checking Malware Name Sandbox Evasion Anti-Monitoring

Malware can use various techniques to evade detection by security analysts and researchers. One such technique is to check the name of the malware sample before fully executing on the infected machine. If the sample has been renamed to a blacklisted name, such as "malware.exe" or "sample.exe", or even with the file hash, the malware can detect this and change …

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 …

Indicator Removal: Timestomp Anti-Forensic Defense Evasion [Mitre]

Timestomping is a technique used by adversaries to modify the timestamps of a file, such as the modify, access, create, and change times. This technique is often used to hide the fact that a file has been modified or created by the adversary, making it more difficult for forensic investigators or file analysis tools to detect the changes.

By …

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 …

File Melt Others

File melting is a technique that malware uses to delete itself after it has been installed on a system. This is often done in order to avoid detection by antivirus programs or other security measures. The process of file melting involves overwriting the file with random data, making it impossible to recover the original file or to detect the presence …

Detecting Online Sandbox Sandbox Evasion

Online sandbox has become very popular for malware analysis. Several malware authors employ such techniques to avoid detection and analysis. Some of these techniques will be summarized here.

Any.Run uses a fake root certificate to spy on sandbox traffic. The first information about the system can be obtained by querying the information of the root certificate. In …

Process Ghosting Process Manipulating

Process Ghosting is a technique used to bypass detection by manipulating the executable image when a process is loaded.

Windows attempts to prevent mapped executables from being modified. Once a file is mapped into an image section, attempts to open it with FILE_WRITE_DATA (to modify it) will fail with ERROR_SHARING_VIOLATION. Deletion attempts via FILE_DELETE_ON_CLOSE/FILE_FLAG_DELETE_ON_CLOSE fail with …

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