System Binary Proxy Execution: MMC Defense Evasion [Mitre]

Adversaries may abuse mmc.exe to proxy execution of malicious .msc files. Microsoft Management Console (MMC) is a binary that may be signed by Microsoft and is used in several ways in either its GUI or in a command prompt. MMC can be used to create, open, and save custom consoles that contain administrative tools created by Microsoft, called snap-ins. These …

Traffic Signaling: Port Knocking Defense Evasion [Mitre]

Adversaries may use port knocking to hide open ports used for persistence or command and control. To enable a port, an adversary sends a series of attempted connections to a predefined sequence of closed ports. After the sequence is completed, opening a port is often accomplished by the host based firewall, but could also be implemented by custom software.

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Traffic Signaling: Socket Filters Defense Evasion [Mitre]

Adversaries may attach filters to a network socket to monitor then activate backdoors used for persistence or command and control. With elevated permissions, adversaries can use features such as the libpcap library to open sockets and install filters to allow or disallow certain types of data to come through the socket. The filter may apply to all traffic passing through …

Constant Blinding Data Obfuscation

Constant blinding can be employed by malware authors to obfuscate their malicious code, making it harder for security researchers and antivirus software to detect and analyze the malware. By using constant blinding techniques, the malware code can be concealed, increasing its chances of evading detection and maintaining persistence on the target system.

Here's how constant blinding can be utilized …

Virtualization/Sandbox Evasion: Time Based Evasion Defense Evasion [Mitre]

Adversaries may employ various time-based methods to detect and avoid virtualization and analysis environments. This may include enumerating time-based properties, such as uptime or the system clock, as well as the use of timers or other triggers to avoid a virtual machine environment (VME) or sandbox, specifically those that are automated or only operate for a limited amount of time.

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XSL Script Processing Defense Evasion [Mitre]

Adversaries may bypass application control and obscure execution of code by embedding scripts inside XSL files. Extensible Stylesheet Language (XSL) files are commonly used to describe the processing and rendering of data within XML files. To support complex operations, the XSL standard includes support for embedded scripting in various languages.

Adversaries may abuse this functionality to execute arbitrary files …

Process Argument Spoofing Process Manipulating

Process Argument Spoofing is a technique used by attackers to hide their true intentions by changing the command line arguments of a process after it has started.

Detecting Virtual Environment Artefacts Sandbox Evasion

Qemu registers some artifacts into the registry. A malware can detect the Qemu installation with a look at the registry key HARDWARE\\DEVICEMAP\\Scsi\\Scsi Port 0\\Scsi Bus 0\\Target Id 0\\Logical Unit Id 0 with the value of Identifier and the data of QEMU or HARDWARE\\Description\\System with a value of SystemBiosVersion and data of QEMU.

The VirtualBox Guest addition leaves many …

SIDT, Red Pill Sandbox Evasion

Red Pill is a technique used by malware to determine whether it is running on a physical machine or a virtual machine. The Red Pill technique involves executing the SIDT instruction, which retrieves the value of the Interrupt Descriptor Table Register (IDTR) and stores it in a memory location.

On a physical machine, the IDTR will contain the address …

CPUID Sandbox Evasion

The CPUID instruction is a low-level command that allows you to retrieve information about the CPU that is currently running. This instruction, which is executed at the CPU level (using the bytecode 0FA2), is available on all processors that are based on the Pentium architecture or newer.

You can use the CPUID instruction to retrieve various pieces of information …

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