Dealing with Advanced Malware

Sophisticated malware requires advanced techniques:

Anti-Analysis Bypass:

# IDA Python script to patch anti-debugging
def patch_anti_debug():
    # Find IsDebuggerPresent call
    for xref in XrefsTo(0x401234):
        # Patch to always return 0
        PatchByte(xref.frm, 0x90)  # NOP

Unpacking Techniques:

Identify packer signatures
Find Original Entry Point (OEP)
Dump unpacked code
Rebuild Import Address Table
Fix PE header

Debugging Protected Code:

Hardware breakpoints
Kernel debugging
Hypervisor-based debugging
Time manipulation
API monitoring