Bypass-Sandbox-Evasion – Bypass Malware Sandbox Evasion Ram Check

Sandboxes are commonly used to analyze malware. They provide a temporary, isolated, and secure environment in which to observe whether a suspicious file exhibits any malicious behavior. However,    

  • The amount of physical

  • The register rcx holds the parameter TotalMemoryInKilobytes. To overwrite the jump address of GetPhysicallyInstalledSystemMemory, I use the following opcodes: mov qword ptr ss:[rcx],4193B840. This moves the value 4193B840 (or 1.1 TB) to rcx. Then, the ret instruction is used to pop the return address off the stack and jump to it, Therefore, whenever GetPhysicallyInstalledSystemMemory is called, it will set rcx to the custom value.”

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