By Bruce Dang
Studying how hacks are performed, so one can cease them within the future
Reverse engineering is the method of reading or software program and realizing it, with no need entry to the resource code or layout records. Hackers may be able to opposite engineer structures and make the most what they locate with frightening effects. Now the great men can use an identical instruments to thwart those threats. useful opposite Engineering is going lower than the hood of opposite engineering for defense analysts, safety engineers, and approach programmers, to allow them to the way to use those comparable techniques to forestall hackers of their tracks.
The booklet covers x86, x64, and ARM (the first e-book to hide all 3) home windows kernel-mode code rootkits and drivers digital computer safeguard ideas and lots more and plenty extra. better of all, it bargains a scientific method of the fabric, with lots of hands-on workouts and real-world examples.
Offers a scientific method of figuring out opposite engineering, with hands-on workouts and real-world examples
Covers x86, x64, and complicated RISC laptop (ARM) architectures in addition to deobfuscation and digital laptop safeguard techniques
Provides precise insurance of home windows kernel-mode code (rootkits/drivers), an issue infrequently lined in different places, and explains how you can learn drivers step by means of step
Demystifies issues that experience a steep studying curve
Includes an advantage bankruptcy on opposite engineering tools
Practical opposite Engineering: utilizing x86, x64, ARM, home windows Kernel, and Reversing instruments presents an important, updated information for a extensive variety of IT execs
Read or Download Practical Reverse Engineering x86, x64, ARM, Windows Kernel, Reversing Tools, and Obfuscation PDF
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Extra resources for Practical Reverse Engineering x86, x64, ARM, Windows Kernel, Reversing Tools, and Obfuscation
An immediate is simply an integer. It is added to or subtracted from the base register to access data at an offset known at compile time. The most common usage is to access a particular field in a structure or vtable. The general format is as follows: STR Ra, [Rb, imm] LDR Ra, [Rc, imm] is the base register, and imm is the offset to be added to Rb. _KDPC Type Importance Number DpcListEntry DeferredRoutine DeferredContext SystemArgument1 SystemArgument2 DpcData : : : : : : : : : UChar UChar Uint2B _LIST_ENTRY Ptr32 void Ptr32 Void Ptr32 Void Ptr32 Void Ptr32 Void Code 01: 02: 03: 04: 05: 06: 07: 08: 09: 13 03 01 43 00 43 C3 C1 02 23 70 23 70 23 80 61 60 61 MOVS STRB MOVS STRB MOVS STRH STR STR STR R3, R3, R3, R3, R3, R3, R3, R1, R2, #0x13 [R0] #1 [R0,#1] #0 [R0,#2] [R0,#0x1C] [R0,#0xC] [R0,#0x10] In this case, R0 is the base register and the immediates are 0x1, 0x2, 0xC, 0x10, and 0x1C.
This particular pseudo-instruction is useful because it allows a 32bit constant to be moved into a register in one instruction. text:0100B20C AD 8B DB 68 dword_100B20C DCD 0x68DB8BAD How did the disassembler shorten the first instruction from LDR R3, [PC, #0xD4] to the alternate form? Because the code is in Thumb state, PC is the current instruction plus 4, which is 0x0100B138; it is using the immediate form of PC, so it is trying to read the word at 0x0100B20C (=0x100B138+0xD4), which happens to be the constant we want to load.
Another way to move a 32-bit constant into a register is to split the constant into two 16-bit halves and move them one a time; this is normally done with the MOVW and MOVT instructions. MOVT sets the top 16 bits of a register, and MOVW sets the bottom 16 bits. The basic arithmetic and logical operations are ADD, SUB, MUL, AND, ORR, and EOR. W ORRS R3, R9 R11, SP, #8 R0, R4, R0,LSL#2 SP, SP, #0x1A8 R2, R3, R5 R2, R4, #7 R3, R3, R1,LSL#3 R3, R2 R3, R3, R2,LSL#8 R3, R3, #2 R3, R2 ; ; ; ; ; ; ; ; ; ; ; r3 = r3+r9 r11 = sp+8 r0 = r4 + (r0 2) sp = sp-0x1a8 r2 = r3*r5 (32bit result) r2 = r4 & 7 (flag) r3 = r3 ^ (r1 3) r3 = r3 ^ r2 (flag) r3 = r3 | (r2 8) r3 = r3 | 2 (flag) r3 = r3 | r2 (flag) Note the “S” after some of these instructions.