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String To Little Endian Shellcode Generator #26

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String To Little Endian Shellcode Generator #26

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42 changes: 42 additions & 0 deletions string-to-shellcode.py
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Original file line number Diff line number Diff line change
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import sys

def main():
if len(sys.argv) != 2:
print("Usage: %s <string>\n" % (sys.argv[0]))
sys.exit(1)
val = sys.argv[1];
n = int(len(val)/4)+1
c = n-1
if (len(val)-c*4)==3:
print("xor eax, eax")
print("mov al, 0x", end='')
print(hex(ord(val[c*4+2]))[2:])
print("shl eax, 0x10")
print("add ax, 0x", end='')
print(hex(ord(val[c*4+1]))[2:], end='')
print(hex(ord(val[c*4]))[2:])
if (len(val)-c*4)==2:
print("xor eax, eax")
print("mov ax, 0x", end='')
print(hex(ord(val[c*4+1]))[2:], end='')
print(hex(ord(val[c*4]))[2:])
if (len(val)-c*4)==1:
print("xor eax, eax")
print("mov al, 0x", end='')
print(hex(ord(val[c*4]))[2:])
if (len(val)-c*4)==0:
print("xor eax, eax")
print("push eax")
c = c -1
while c >= 0:
print("push 0x", end='')
print(hex(ord(val[c*4+3]))[2:], end='')
print(hex(ord(val[c*4+2]))[2:], end='')
print(hex(ord(val[c*4+1]))[2:], end='')
print(hex(ord(val[c*4]))[2:])
c = c -1
print("push esp")
sys.exit(0)

if __name__ == "__main__":
main()