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Hiding Mechanisms
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 …
Read moreDNS Tunneling
![Defense Evasion [Mitre] icon](/media/2024/04/08/icons8-burglar.svg){kind=small}
DNS tunneling is a technique that uses the Domain Name System (DNS) protocol to transfer data in an encrypted and covert manner. It involves encoding the data of other programs or protocols in DNS queries and responses, and using DNS servers as a means of communication.
To carry out DNS tunneling, the attacker typically needs access to a compromised …
Read moreDNS Hijacking
DNS hijacking or DNS redirection is a technique used to subvert the normal domain name resolution process. It involves redirecting DNS queries to a rogue DNS server controlled by an attacker, or modifying the behavior of a trusted DNS server so that it does not comply with internet standards. This can be done for various purposes, such as phishing attacks, …
Read moreIndicator Removal: Timestomp
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 …
Read moreFile Melt
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 …
Read moreProcess Ghosting
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 …
ProcEnvInjection - Remote code injection by abusing process environment strings
This method allows to inject custom code into a remote process without using WriteProcessMemory - It will use the lpEnvironment parameter in CreateProcess to copy the code into the target process. This technique can be used to load a DLL into a remote process, or simply execute a block of code.
The lpEnvironment parameter in CreateProcess allows us to …
Misusing Structured Exception Handlers
Misusing Structured Exception Handlers is a technique used by malware to make it more difficult for security analysts to reverse engineer the code. Structured Exception Handlers (SEH) are functions that are used to handle exceptions in a program. These can be misused by malware to fool disassemblers and make it harder to analyze the code. One way this is done …
Read moreChange Module Name at Runtime
It is possible to change the name of the current process or any of its modules at runtime. This is achieved by accessing the process PEB's member 'Ldr', in particular it has a member 'InOrderMemoryLinks' which we can iterate through to get a list of the process's modules.
On each iteration it gets a PLDR_DATA_TABLE_ENTRY structure to work with …
Change Module Base Address at Runtime
It is possible to change the DllBase of a module at runtime. This can trick debugging and analysis tools such as IDA or Cheat Engine into thinking a module's base is actually at another address.
This is achieved by accessing the process PEB's member 'Ldr', in particular it has a member InOrderMemoryLinks which we can iterate through to get …