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# Author: Nick Landers (@monogas)
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import sys
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import pefile
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from struct import pack
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8 | 9 |
def is64BitDLL(bytes):
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pe = pefile.PE(data=bytes, fast_load=True)
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pe = pefile.PE(data=bytes, fast_load=True)
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10 | 11 |
return (pe.OPTIONAL_HEADER.Magic == 0x20b)
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11 | 12 |
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12 | 14 |
ror = lambda val, r_bits, max_bits: \
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((val & (2**max_bits-1)) >> r_bits%max_bits) | \
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(val << (max_bits-(r_bits%max_bits)) & (2**max_bits-1))
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((val & (2 ** max_bits - 1)) >> r_bits % max_bits) | \
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(val << (max_bits - (r_bits % max_bits)) & (2 ** max_bits - 1))
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15 | 17 |
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def HashFunctionName(name, module = None):
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17 | 18 |
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function = name.encode('UTF-16LE') + b'\x00'
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def HashFunctionName(name, module=None):
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function = name.encode('UTF-16LE') + b'\x00'
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if(module):
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module = module.upper().encode('UTF-16LE') + b'\x00\x00'
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if (module):
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module = module.upper().encode('UTF-16LE') + b'\x00\x00'
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22 | 24 |
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functionHash = 0
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functionHash = 0
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24 | 26 |
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for b in function:
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functionHash = ror(functionHash, 13, 32)
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functionHash += b
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for b in function:
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functionHash = ror(functionHash, 13, 32)
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functionHash += b
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28 | 30 |
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moduleHash = 0
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moduleHash = 0
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30 | 32 |
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for b in module:
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moduleHash = ror(moduleHash, 13, 32)
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moduleHash += b
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for b in module:
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moduleHash = ror(moduleHash, 13, 32)
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moduleHash += b
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functionHash += moduleHash
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functionHash += moduleHash
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if functionHash > 0xFFFFFFFF: functionHash -= 0x100000000
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if functionHash > 0xFFFFFFFF: functionHash -= 0x100000000
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else:
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functionHash = 0
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else:
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functionHash = 0
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for b in function:
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functionHash = ror(functionHash, 13, 32)
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functionHash += b
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for b in function:
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functionHash = ror(functionHash, 13, 32)
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functionHash += b
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return functionHash
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return functionHash
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def ConvertToShellcode(dllBytes, functionHash=0x10, userData=b'None', flags=0):
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rdiShellcode32 = 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56\x18\x85\xD2\x0F\x85\x6B\xFF\xFF\xFF\x33\xC0\x5F\x5E\x5D\x5B\x83\xC4\x10\xC3\x8B\x74\x24\x10\x8B\x44\x16\x24\x8D\x04\x58\x0F\xB7\x0C\x10\x8B\x44\x16\x1C\x8D\x04\x88\x8B\x04\x10\x03\xC2\xEB\xDB"
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51 | 53 |
rdiShellcode64 = b"\x48\x8B\xC4\x44\x89\x48\x20\x4C\x89\x40\x18\x89\x50\x10\x53\x55\x56\x57\x41\x54\x41\x55\x41\x56\x41\x57\x48\x83\xEC\x78\x83\x60\x08\x00\x48\x8B\xE9\xB9\x4C\x77\x26\x07\x44\x8B\xFA\x33\xDB\xE8\xA4\x04\x00\x00\xB9\x49\xF7\x02\x78\x4C\x8B\xE8\xE8\x97\x04\x00\x00\xB9\x58\xA4\x53\xE5\x48\x89\x44\x24\x20\xE8\x88\x04\x00\x00\xB9\x10\xE1\x8A\xC3\x48\x8B\xF0\xE8\x7B\x04\x00\x00\xB9\xAF\xB1\x5C\x94\x48\x89\x44\x24\x30\xE8\x6C\x04\x00\x00\xB9\x33\x00\x9E\x95\x48\x89\x44\x24\x28\x4C\x8B\xE0\xE8\x5A\x04\x00\x00\x48\x63\x7D\x3C\x4C\x8B\xD0\x48\x03\xFD\x81\x3F\x50\x45\x00\x00\x74\x07\x33\xC0\xE9\x2D\x04\x00\x00\xB8\x64\x86\x00\x00\x66\x39\x47\x04\x75\xEE\x41\xBE\x01\x00\x00\x00\x44\x84\x77\x38\x75\xE2\x0F\xB7\x47\x06\x0F\xB7\x4F\x14\x44\x8B\x4F\x38\x85\xC0\x74\x2C\x48\x8D\x57\x24\x44\x8B\xC0\x48\x03\xD1\x8B\x4A\x04\x85\xC9\x75\x07\x8B\x02\x49\x03\xC1\xEB\x04\x8B\x02\x03\xC1\x48\x3B\xC3\x48\x0F\x47\xD8\x48\x83\xC2\x28\x4D\x2B\xC6\x75\xDE\x48\x8D\x4C\x24\x38\x41\xFF\xD2\x44\x8B\x44\x24\x3C\x44\x8B\x4F\x50\x41\x8D\x40\xFF\xF7\xD0\x41\x8D\x50\xFF\x41\x03\xD1\x49\x8D\x48\xFF\x48\x23\xD0\x48\x03\xCB\x49\x8D\x40\xFF\x48\xF7\xD0\x48\x23\xC8\x48\x3B\xD1\x0F\x85\x6B\xFF\xFF\xFF\x33\xC9\x41\x8B\xD1\x41\xB8\x00\x30\x00\x00\x44\x8D\x49\x04\xFF\xD6\x44\x8B\x47\x54\x33\xD2\x48\x8B\xF0\x4C\x8B\xD5\x48\x8B\xC8\x44\x8D\x5A\x02\x4D\x85\xC0\x74\x3F\x44\x8B\x8C\x24\xE0\x00\x00\x00\x45\x23\xCE\x4D\x2B\xC6\x45\x85\xC9\x74\x19\x48\x8B\xC7\x48\x2B\xC5\x48\x3B\xD0\x73\x0E\x48\x8D\x42\xC4\x49\x3B\xC3\x76\x05\xC6\x01\x00\xEB\x05\x41\x8A\x02\x88\x01\x49\x03\xD6\x4D\x03\xD6\x49\x03\xCE\x4D\x85\xC0\x75\xCC\x44\x0F\xB7\x57\x06\x0F\xB7\x47\x14\x4D\x85\xD2\x74\x38\x48\x8D\x4F\x2C\x48\x03\xC8\x8B\x51\xF8\x4D\x2B\xD6\x44\x8B\x01\x48\x03\xD6\x44\x8B\x49\xFC\x4C\x03\xC5\x4D\x85\xC9\x74\x10\x41\x8A\x00\x4D\x03\xC6\x88\x02\x49\x03\xD6\x4D\x2B\xCE\x75\xF0\x48\x83\xC1\x28\x4D\x85\xD2\x75\xCF\x8B\x9F\x90\x00\x00\x00\x48\x03\xDE\x8B\x43\x0C\x85\xC0\x0F\x84\x8A\x00\x00\x00\x48\x8B\x6C\x24\x20\x8B\xC8\x48\x03\xCE\x41\xFF\xD5\x44\x8B\x3B\x4C\x8B\xE0\x44\x8B\x73\x10\x4C\x03\xFE\x4C\x03\xF6\xEB\x49\x49\x83\x3F\x00\x7D\x29\x49\x63\x44\x24\x3C\x41\x0F\xB7\x17\x42\x8B\x8C\x20\x88\x00\x00\x00\x42\x8B\x44\x21\x10\x42\x8B\x4C\x21\x1C\x48\x2B\xD0\x49\x03\xCC\x8B\x04\x91\x49\x03\xC4\xEB\x0F\x49\x8B\x16\x49\x8B\xCC\x48\x83\xC2\x02\x48\x03\xD6\xFF\xD5\x49\x89\x06\x49\x83\xC6\x08\x49\x83\xC7\x08\x49\x83\x3E\x00\x75\xB1\x8B\x43\x20\x48\x83\xC3\x14\x85\xC0\x75\x8C\x44\x8B\xBC\x24\xC8\x00\x00\x00\x44\x8D\x70\x01\x4C\x8B\x64\x24\x28\x4C\x8B\xCE\x41\xBD\x02\x00\x00\x00\x4C\x2B\x4F\x30\x83\xBF\xB4\x00\x00\x00\x00\x0F\x84\x95\x00\x00\x00\x8B\x97\xB0\x00\x00\x00\x48\x03\xD6\x8B\x42\x04\x85\xC0\x0F\x84\x81\x00\x00\x00\xBB\xFF\x0F\x00\x00\x44\x8B\x02\x4C\x8D\x5A\x08\x44\x8B\xD0\x4C\x03\xC6\x49\x83\xEA\x08\x49\xD1\xEA\x74\x59\x41\x0F\xB7\x0B\x4D\x2B\xD6\x0F\xB7\xC1\x66\xC1\xE8\x0C\x66\x83\xF8\x0A\x75\x09\x48\x23\xCB\x4E\x01\x0C\x01\xEB\x34\x66\x83\xF8\x03\x75\x09\x48\x23\xCB\x46\x01\x0C\x01\xEB\x25\x66\x41\x3B\xC6\x75\x11\x48\x23\xCB\x49\x8B\xC1\x48\xC1\xE8\x10\x66\x42\x01\x04\x01\xEB\x0E\x66\x41\x3B\xC5\x75\x08\x48\x23\xCB\x66\x46\x01\x0C\x01\x4D\x03\xDD\x4D\x85\xD2\x75\xA7\x8B\x42\x04\x48\x03\xD0\x8B\x42\x04\x85\xC0\x75\x84\x0F\xB7\x6F\x06\x0F\xB7\x47\x14\x48\x85\xED\x0F\x84\xCF\x00\x00\x00\x8B\x9C\x24\xC0\x00\x00\x00\x4C\x8D\x77\x3C\x4C\x8B\x6C\x24\x30\x4C\x03\xF0\x48\xFF\xCD\x41\x83\x7E\xEC\x00\x0F\x86\x9D\x00\x00\x00\x45\x8B\x06\x41\x8B\xD0\xC1\xEA\x1E\x41\x8B\xC0\x41\x8B\xC8\xC1\xE8\x1D\x83\xE2\x01\xC1\xE9\x1F\x83\xE0\x01\x75\x1E\x85\xD2\x75\x0B\xF7\xD9\x1B\xDB\x83\xE3\x07\xFF\xC3\xEB\x3E\xF7\xD9\xB8\x02\x00\x00\x00\x1B\xDB\x23\xD8\x03\xD8\xEB\x2F\x85\xD2\x75\x18\x85\xC9\x75\x05\x8D\x5A\x10\xEB\x22\x85\xD2\x75\x0B\x85\xC9\x74\x1A\xBB\x80\x00\x00\x00\xEB\x13\x85\xC9\x75\x05\x8D\x59\x20\xEB\x0A\x85\xC9\xB8\x40\x00\x00\x00\x0F\x45\xD8\x41\x8B\x4E\xE8\x4C\x8D\x8C\x24\xC0\x00\x00\x00\x41\x8B\x56\xEC\x8B\xC3\x0F\xBA\xE8\x09\x41\x81\xE0\x00\x00\x00\x04\x0F\x44\xC3\x48\x03\xCE\x44\x8B\xC0\x8B\xD8\x41\xFF\xD5\x85\xC0\x0F\x84\xA1\xFC\xFF\xFF\x49\x83\xC6\x28\x48\x85\xED\x0F\x85\x48\xFF\xFF\xFF\x44\x8D\x6D\x02\x8B\x5F\x28\x45\x33\xC0\x33\xD2\x48\x83\xC9\xFF\x48\x03\xDE\x41\xFF\xD4\xBD\x01\x00\x00\x00\x48\x8B\xCE\x44\x8B\xC5\x8B\xD5\xFF\xD3\x45\x85\xFF\x0F\x84\x97\x00\x00\x00\x83\xBF\x8C\x00\x00\x00\x00\x0F\x84\x8A\x00\x00\x00\x8B\x97\x88\x00\x00\x00\x48\x03\xD6\x44\x8B\x5A\x18\x45\x85\xDB\x74\x78\x83\x7A\x14\x00\x74\x72\x44\x8B\x52\x20\x33\xDB\x44\x8B\x4A\x24\x4C\x03\xD6\x4C\x03\xCE\x45\x85\xDB\x74\x5D\x45\x8B\x02\x4C\x03\xC6\x33\xC9\x41\x0F\xBE\x00\x4C\x03\xC5\xC1\xC9\x0D\x03\xC8\x41\x80\x78\xFF\x00\x75\xED\x44\x3B\xF9\x74\x10\x03\xDD\x49\x83\xC2\x04\x4D\x03\xCD\x41\x3B\xDB\x72\xD2\xEB\x2D\x41\x0F\xB7\x01\x83\xF8\xFF\x74\x24\x8B\x52\x1C\x48\x8B\x8C\x24\xD0\x00\x00\x00\xC1\xE0\x02\x48\x98\x48\x03\xC6\x44\x8B\x04\x02\x8B\x94\x24\xD8\x00\x00\x00\x4C\x03\xC6\x41\xFF\xD0\x48\x8B\xC6\x48\x83\xC4\x78\x41\x5F\x41\x5E\x41\x5D\x41\x5C\x5F\x5E\x5D\x5B\xC3\xCC\xCC\xCC\x48\x89\x5C\x24\x08\x48\x89\x74\x24\x10\x57\x48\x83\xEC\x10\x65\x48\x8B\x04\x25\x60\x00\x00\x00\x8B\xF1\x48\x8B\x50\x18\x4C\x8B\x4A\x10\x4D\x8B\x41\x30\x4D\x85\xC0\x0F\x84\xB4\x00\x00\x00\x41\x0F\x10\x41\x58\x49\x63\x40\x3C\x33\xD2\x4D\x8B\x09\xF3\x0F\x7F\x04\x24\x42\x8B\x9C\x00\x88\x00\x00\x00\x85\xDB\x74\xD4\x48\x8B\x04\x24\x48\xC1\xE8\x10\x44\x0F\xB7\xD0\x45\x85\xD2\x74\x21\x48\x8B\x4C\x24\x08\x45\x8B\xDA\x0F\xBE\x01\xC1\xCA\x0D\x80\x39\x61\x7C\x03\x83\xC2\xE0\x03\xD0\x48\xFF\xC1\x49\x83\xEB\x01\x75\xE7\x4D\x8D\x14\x18\x33\xC9\x41\x8B\x7A\x20\x49\x03\xF8\x41\x39\x4A\x18\x76\x8F\x8B\x1F\x45\x33\xDB\x49\x03\xD8\x48\x8D\x7F\x04\x0F\xBE\x03\x48\xFF\xC3\x41\xC1\xCB\x0D\x44\x03\xD8\x80\x7B\xFF\x00\x75\xED\x41\x8D\x04\x13\x3B\xC6\x74\x0D\xFF\xC1\x41\x3B\x4A\x18\x72\xD1\xE9\x5B\xFF\xFF\xFF\x41\x8B\x42\x24\x03\xC9\x49\x03\xC0\x0F\xB7\x14\x01\x41\x8B\x4A\x1C\x49\x03\xC8\x8B\x04\x91\x49\x03\xC0\xEB\x02\x33\xC0\x48\x8B\x5C\x24\x20\x48\x8B\x74\x24\x28\x48\x83\xC4\x10\x5F\xC3"
|
52 | 54 |
|
|
98 | 100 |
|
99 | 101 |
# sub rsp, 0x30 - Create some breathing room on the stack
|
100 | 102 |
bootstrap += b'\x48\x83\xec'
|
101 | |
bootstrap += b'\x30' # 32 bytes for shadow space + 8 bytes for last arg + 8 bytes for stack alignment
|
|
103 |
bootstrap += b'\x30' # 32 bytes for shadow space + 8 bytes for last arg + 8 bytes for stack alignment
|
102 | 104 |
|
103 | 105 |
# mov dword ptr [rsp + 0x20], <Flags> - Push arg 5 just above shadow space
|
104 | 106 |
bootstrap += b'\xC7\x44\x24'
|
|
107 | 109 |
|
108 | 110 |
# call - Transfer execution to the RDI
|
109 | 111 |
bootstrap += b'\xe8'
|
110 | |
bootstrap += pack('b', bootstrapSize - len(bootstrap) - 4) # Skip over the remainder of instructions
|
|
112 |
bootstrap += pack('b', bootstrapSize - len(bootstrap) - 4) # Skip over the remainder of instructions
|
111 | 113 |
bootstrap += b'\x00\x00\x00'
|
112 | 114 |
|
113 | 115 |
# mov rsp, rsi - Reset our original stack pointer
|
|
118 | 120 |
|
119 | 121 |
# ret - return to caller
|
120 | 122 |
bootstrap += b'\xc3'
|
121 | |
|
122 | 123 |
# Ends up looking like this in memory:
|
123 | 124 |
# Bootstrap shellcode
|
124 | 125 |
# RDI shellcode
|
|
126 | 127 |
# User data
|
127 | 128 |
return bootstrap + rdiShellcode + dllBytes + userData
|
128 | 129 |
|
129 | |
else: # 32 bit
|
|
130 |
else: # 32 bit
|
130 | 131 |
rdiShellcode = rdiShellcode32
|
131 | 132 |
|
132 | 133 |
bootstrap = b''
|
|
173 | 174 |
|
174 | 175 |
# call - Transfer execution to the RDI
|
175 | 176 |
bootstrap += b'\xe8'
|
176 | |
bootstrap += pack('b', bootstrapSize - len(bootstrap) - 4) # Skip over the remainder of instructions
|
|
177 |
bootstrap += pack('b', bootstrapSize - len(bootstrap) - 4) # Skip over the remainder of instructions
|
177 | 178 |
bootstrap += b'\x00\x00\x00'
|
178 | 179 |
|
179 | 180 |
# add esp, 0x14 - correct the stack pointer
|