Search Evasion Techniques
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ConfuserEx Packers
ConfuserEx is a open-source protector for .NET applications. It is the successor of Confuser project. It's primarily designed to make reverse engineering difficult for applications written in .NET languages like C# and VB.NET. ConfuserEx does this by using a variety of techniques like symbol renaming, control flow obfuscation, and encryption of strings and resources.
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Supports .NET …
PESpin Packers
PESpin is a Windows executable files protector, compressor coded in Win32ASM using MASM. Overall, this application will enable the compression of the entire executable - code, data, and resources, thus leaving the file protected against patching or disassembling.
Dirty Vanity Process Manipulating
Dirty Vanity is a process injection technique that exploits the Windows forking (process reflection and snapshotting) feature to inject code into a new process.
It uses the RtlCreateProcessReflection or NtCreateProcess[Ex] primitives, along with the PROCESS_VM_OPERATION, PROCESS_CREATE_THREAD, and PROCESS_DUP_HANDLE flags to reflect and execute code in a new process.
The technique also makes use of various methods, …
Milfuscator Packers
Milfuscator is a tool used to obfuscate the code in a Portable Executable (PE) file by modifying and expanding the existing code in the ".text" section, without creating any new sections. It does this using the Zydis and AsmJit libraries, and is based on the concept of code mutation from a P2C project for the game Counter-Strike: Global Offensive. The …
Access Token Manipulation: SID-History Injection Defense Evasion [Mitre]
Adversaries may use SID-History Injection to escalate privileges and bypass access controls. The Windows security identifier (SID) is a unique value that identifies a user or group account. SIDs are used by Windows security in both security descriptors and access tokens. An account can hold additional SIDs in the SID-History Active Directory attribute, allowing inter-operable account migration between domains (e.g., …
Domain Policy Modification: Domain Trust Modification Defense Evasion [Mitre]
Adversaries may add new domain trusts or modify the properties of existing domain trusts to evade defenses and/or elevate privileges. Domain trust details, such as whether or not a domain is federated, allow authentication and authorization properties to apply between domains for the purpose of accessing shared resources. These trust objects may include accounts, credentials, and other authentication material applied …
Hide Artifacts: VBA Stomping Defense Evasion [Mitre]
Adversaries may hide malicious Visual Basic for Applications (VBA) payloads embedded within MS Office documents by replacing the VBA source code with benign data.
MS Office documents with embedded VBA content store source code inside of module streams. Each module stream has a PerformanceCache that stores a separate compiled version of the VBA source code known as p-code. The …
Masquerading: Match Legitimate Name or Location Defense Evasion [Mitre]
Adversaries may match or approximate the name or location of legitimate files or resources when naming/placing them. This is done for the sake of evading defenses and observation. This may be done by placing an executable in a commonly trusted directory (ex: under System32) or giving it the name of a legitimate, trusted program (ex: svchost.exe). In containerized environments, this …
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 …
Modify Authentication Process: Domain Controller Authentication Defense Evasion [Mitre]
Adversaries may patch the authentication process on a domain controller to bypass the typical authentication mechanisms and enable access to accounts.
Malware may be used to inject false credentials into the authentication process on a domain controller with the intent of creating a backdoor used to access any user’s account and/or credentials (ex: Skeleton Key). Skeleton key works through …