Search Evasion Techniques
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157 item(s) found so far for this keyword.
CryptOne Packers
A packing software called CryptOne became popular among some major threat actors. It was first reported by Fox-IT that the group behind Wastedlocker has begun using it, as well as Netwalker, Gozi ISFB v3, ZLoader, Emotet, Dridex, and Smokeloader.
BobSoft Mini Delphi Packer Packers
The Delphi programming language can be an easy way to write applications and programs that leverage Windows API functions. In fact, some actors deliberately include the default libraries as a diversion to hamper static analysis and make the application "look legit" during dynamic analysis.
The packer goes to great lengths to ensure that it is not running in an …
Hijack Execution Flow: DLL Search Order Hijacking Defense Evasion [Mitre]
Adversaries may execute their own malicious payloads by hijacking the search order used to load DLLs. Windows systems use a common method to look for required DLLs to load into a program. Hijacking DLL loads may be for the purpose of establishing persistence as well as elevating privileges and/or evading restrictions on file execution.
There are many ways an …
Tamper DLL Export Names & GetProcAddress Spoofing Process Manipulating
When a process is running, it is possible to change the results of the call to GetProcAddress API, for the exported functions of a module along with modifying the export's offsets and name at runtime.
For example, the offset of kernel32.dll's function VirtualAlloc can be change to the offset of another function. When VirtualAlloc is called (after getting its …
Domain Policy Modification: Group Policy Modification Defense Evasion [Mitre]
Adversaries may modify Group Policy Objects (GPOs) to subvert the intended discretionary access controls for a domain, usually with the intention of escalating privileges on the domain. Group policy allows for centralized management of user and computer settings in Active Directory (AD). GPOs are containers for group policy settings made up of files stored within a predicable network path \\SYSVOL\\Policies.
…Avoiding Memory Scanners (Yara, Pe-sieve...) Others
Avoiding Memory Scanners is a technique that enables malware creators to bypass the detection of endpoint security software and reverse engineers by using memory scanning to locate shellcode and malware in Windows memory.
The technique involves understanding how memory scanners work and implementing a stable evasion method for each of the memory scanning tools, such as PE-sieve, MalMemDetect, Moneta, …
Return Address Spoofing Antivirus/EDR Evasion
Return Address Spoofing is a technique used in x64 architecture to bypass the limitations of the x64 fastcall mechanism. The traditional method of spoofing return addresses in x86 (e.g. using a ret in a game module as a trampoline) is not feasible in x64 due to caller cleanup and red zone.
To overcome this, the code creates a temporary …
Hide Artifacts: Hidden Users Defense Evasion [Mitre]
Adversaries may use hidden users to hide the presence of user accounts they create or modify. Administrators may want to hide users when there are many user accounts on a given system or if they want to hide their administrative or other management accounts from other users.
Adversaries may hide user accounts in Windows. Adversaries can set the HKLM\SOFTWARE\Microsoft\Windows …
Hide Artifacts: Hidden Window Defense Evasion [Mitre]
Adversaries may use hidden windows to conceal malicious activity from the plain sight of users. In some cases, windows that would typically be displayed when an application carries out an operation can be hidden. This may be utilized by system administrators to avoid disrupting user work environments when carrying out administrative tasks.
On Windows, there are a variety of …
Hide Artifacts: NTFS File Attributes Defense Evasion [Mitre]
Adversaries may use NTFS file attributes to hide their malicious data in order to evade detection. Every New Technology File System (NTFS) formatted partition contains a Master File Table (MFT) that maintains a record for every file/directory on the partition. Within MFT entries are file attributes, such as Extended Attributes (EA) and Data [known as Alternate Data Streams (ADSs) when …