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Anti Incident Response - SANS Computer Forensics

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13<br />

Getting Around the Syscall Problem<br />

• Windows: Detect if EIP is within NTDLL.DLL range,<br />

if so, resume thread and try again later.<br />

• Unix: Detect if EIP is within range of a library object<br />

(if dynamically-linked), or disassemble previous<br />

instruction and determine if it was a syscall<br />

interrupt, and try again later<br />

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