Search Evasion Techniques
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Valid Accounts: Default Accounts Defense Evasion [Mitre]
Adversaries may obtain and abuse credentials of a default account as a means of gaining Initial Access, Persistence, Privilege Escalation, or Defense Evasion. Default accounts are those that are built-into an OS, such as the Guest or Administrator accounts on Windows systems. Default accounts also include default factory/provider set accounts on other types of systems, software, or devices, including the …
Virtualization/Sandbox Evasion: System Checks Defense Evasion [Mitre]
Adversaries may employ various system checks to detect and avoid virtualization and analysis environments. This may include changing behaviors based on the results of checks for the presence of artifacts indicative of a virtual machine environment (VME) or sandbox. If the adversary detects a VME, they may alter their malware to disengage from the victim or conceal the core functions …
BuildCommDCBAndTimeoutA Sandbox Evasion
This technique uses a BuildCommDCBAndTimeoutsA API call to determine if the malware is detonating in a sandbox. Normally, a bogus device string would cause this API call to fail. However, some malware sandbox environments may emulate in a way that allows the API call to succeed even when given a bogus device string.