mirror of
https://github.com/nbaertsch/nimvoke
synced 2026-06-06 16:24:26 +00:00
nbaertsch
162 lines
9.9 KiB
Nim
162 lines
9.9 KiB
Nim
## File: syscalls.nim
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## Author: nbaertsch
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##
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## Example usage of 'nimvoke/dinvoke' to execute shellcode
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import winim
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import ../src/nimvoke/dinvoke
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from ../src/nimvoke/inc/nimjaStructs import PUSER_THREAD_START_ROUTINE, PPS_ATTRIBUTE_LIST
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# Message box shellcode
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var shellcode = @[
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byte 0x48, 0x83, 0xec, 0x28, 0xe8, 0x9f, 0x02, 0x00, 0x00, 0x48, 0x83, 0xc4,
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0x28, 0xc3, 0xcc, 0xcc, 0x48, 0x83, 0xec, 0x18, 0x65, 0x48, 0x8b, 0x04,
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0x25, 0x60, 0x00, 0x00, 0x00, 0x48, 0x89, 0x04, 0x24, 0x48, 0x8b, 0x04,
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0x24, 0x48, 0x83, 0xc4, 0x18, 0xc3, 0xcc, 0xcc, 0x48, 0x89, 0x4c, 0x24,
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0x08, 0x48, 0x83, 0xec, 0x18, 0xc7, 0x04, 0x24, 0x00, 0x00, 0x00, 0x00,
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0x48, 0x8b, 0x44, 0x24, 0x20, 0x0f, 0xbe, 0x00, 0x85, 0xc0, 0x74, 0x58,
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0x8b, 0x04, 0x24, 0xc1, 0xe8, 0x0d, 0x8b, 0x0c, 0x24, 0xc1, 0xe1, 0x13,
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0x0b, 0xc1, 0x89, 0x04, 0x24, 0x48, 0x8b, 0x44, 0x24, 0x20, 0x0f, 0xbe,
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0x00, 0x83, 0xf8, 0x61, 0x7c, 0x11, 0x48, 0x8b, 0x44, 0x24, 0x20, 0x0f,
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0xbe, 0x00, 0x83, 0xe8, 0x20, 0x89, 0x44, 0x24, 0x04, 0xeb, 0x0c, 0x48,
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0x8b, 0x44, 0x24, 0x20, 0x0f, 0xbe, 0x00, 0x89, 0x44, 0x24, 0x04, 0x8b,
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0x44, 0x24, 0x04, 0x8b, 0x0c, 0x24, 0x03, 0xc8, 0x8b, 0xc1, 0x89, 0x04,
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0x24, 0x48, 0x8b, 0x44, 0x24, 0x20, 0x48, 0xff, 0xc0, 0x48, 0x89, 0x44,
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0x24, 0x20, 0xeb, 0x9c, 0x8b, 0x04, 0x24, 0x48, 0x83, 0xc4, 0x18, 0xc3,
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0x48, 0x89, 0x4c, 0x24, 0x08, 0x48, 0x83, 0xec, 0x18, 0xc7, 0x04, 0x24,
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0x10, 0x00, 0x00, 0x00, 0x48, 0x63, 0x04, 0x24, 0x48, 0x8b, 0x4c, 0x24,
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0x20, 0x48, 0x2b, 0xc8, 0x48, 0x8b, 0xc1, 0x48, 0x83, 0xc4, 0x18, 0xc3,
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0x89, 0x4c, 0x24, 0x08, 0x48, 0x81, 0xec, 0x98, 0x00, 0x00, 0x00, 0xe8,
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0x34, 0xff, 0xff, 0xff, 0x48, 0x89, 0x44, 0x24, 0x58, 0x48, 0x8b, 0x44,
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0x24, 0x58, 0x48, 0x8b, 0x40, 0x18, 0x48, 0x8b, 0x40, 0x20, 0x48, 0x89,
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0x44, 0x24, 0x50, 0x48, 0x8b, 0x44, 0x24, 0x50, 0x48, 0x89, 0x44, 0x24,
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0x40, 0x48, 0x8b, 0x4c, 0x24, 0x40, 0xe8, 0xa1, 0xff, 0xff, 0xff, 0x48,
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0x89, 0x44, 0x24, 0x60, 0x48, 0x8b, 0x44, 0x24, 0x40, 0x48, 0x8b, 0x00,
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0x48, 0x89, 0x44, 0x24, 0x40, 0x48, 0x8b, 0x44, 0x24, 0x60, 0x48, 0x8b,
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0x40, 0x30, 0x48, 0x89, 0x44, 0x24, 0x28, 0x48, 0x83, 0x7c, 0x24, 0x28,
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0x00, 0x75, 0x05, 0xe9, 0x58, 0x01, 0x00, 0x00, 0x48, 0x8b, 0x44, 0x24,
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0x28, 0x48, 0x89, 0x44, 0x24, 0x68, 0x48, 0x8b, 0x44, 0x24, 0x68, 0x48,
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0x63, 0x40, 0x3c, 0x48, 0x8b, 0x4c, 0x24, 0x28, 0x48, 0x03, 0xc8, 0x48,
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0x8b, 0xc1, 0x48, 0x89, 0x44, 0x24, 0x70, 0xb8, 0x08, 0x00, 0x00, 0x00,
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0x48, 0x6b, 0xc0, 0x00, 0x48, 0x8b, 0x4c, 0x24, 0x70, 0x8b, 0x84, 0x01,
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0x88, 0x00, 0x00, 0x00, 0x89, 0x44, 0x24, 0x34, 0x83, 0x7c, 0x24, 0x34,
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0x00, 0x75, 0x05, 0xe9, 0x10, 0x01, 0x00, 0x00, 0x8b, 0x44, 0x24, 0x34,
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0x48, 0x8b, 0x4c, 0x24, 0x28, 0x48, 0x03, 0xc8, 0x48, 0x8b, 0xc1, 0x48,
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0x89, 0x44, 0x24, 0x38, 0x48, 0x8b, 0x44, 0x24, 0x38, 0x8b, 0x40, 0x0c,
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0x48, 0x8b, 0x4c, 0x24, 0x28, 0x48, 0x03, 0xc8, 0x48, 0x8b, 0xc1, 0x48,
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0x89, 0x44, 0x24, 0x78, 0x48, 0x8b, 0x4c, 0x24, 0x78, 0xe8, 0x7a, 0xfe,
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0xff, 0xff, 0x89, 0x44, 0x24, 0x48, 0x48, 0x8b, 0x44, 0x24, 0x38, 0x8b,
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0x40, 0x20, 0x48, 0x8b, 0x4c, 0x24, 0x28, 0x48, 0x03, 0xc8, 0x48, 0x8b,
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0xc1, 0x48, 0x89, 0x84, 0x24, 0x80, 0x00, 0x00, 0x00, 0xc7, 0x44, 0x24,
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0x20, 0x00, 0x00, 0x00, 0x00, 0xeb, 0x0a, 0x8b, 0x44, 0x24, 0x20, 0xff,
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0xc0, 0x89, 0x44, 0x24, 0x20, 0x48, 0x8b, 0x44, 0x24, 0x38, 0x8b, 0x40,
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0x18, 0x39, 0x44, 0x24, 0x20, 0x0f, 0x83, 0x95, 0x00, 0x00, 0x00, 0x8b,
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0x44, 0x24, 0x20, 0x48, 0x8b, 0x8c, 0x24, 0x80, 0x00, 0x00, 0x00, 0x8b,
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0x04, 0x81, 0x48, 0x8b, 0x4c, 0x24, 0x28, 0x48, 0x03, 0xc8, 0x48, 0x8b,
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0xc1, 0x48, 0x89, 0x84, 0x24, 0x88, 0x00, 0x00, 0x00, 0x48, 0x8b, 0x8c,
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0x24, 0x88, 0x00, 0x00, 0x00, 0xe8, 0x06, 0xfe, 0xff, 0xff, 0x8b, 0x4c,
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0x24, 0x48, 0x03, 0xc8, 0x8b, 0xc1, 0x39, 0x84, 0x24, 0xa0, 0x00, 0x00,
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0x00, 0x75, 0x50, 0x48, 0x8b, 0x44, 0x24, 0x38, 0x8b, 0x40, 0x24, 0x48,
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0x8b, 0x4c, 0x24, 0x28, 0x48, 0x03, 0xc8, 0x48, 0x8b, 0xc1, 0x8b, 0x4c,
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0x24, 0x20, 0x0f, 0xb7, 0x04, 0x48, 0x66, 0x89, 0x44, 0x24, 0x30, 0x48,
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0x8b, 0x44, 0x24, 0x38, 0x8b, 0x40, 0x1c, 0x48, 0x8b, 0x4c, 0x24, 0x28,
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0x48, 0x03, 0xc8, 0x48, 0x8b, 0xc1, 0x0f, 0xb7, 0x4c, 0x24, 0x30, 0x8b,
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0x04, 0x88, 0x89, 0x44, 0x24, 0x4c, 0x8b, 0x44, 0x24, 0x4c, 0x48, 0x8b,
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0x4c, 0x24, 0x28, 0x48, 0x03, 0xc8, 0x48, 0x8b, 0xc1, 0xeb, 0x17, 0xe9,
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0x4f, 0xff, 0xff, 0xff, 0x48, 0x8b, 0x44, 0x24, 0x50, 0x48, 0x39, 0x44,
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0x24, 0x40, 0x0f, 0x85, 0x61, 0xfe, 0xff, 0xff, 0x33, 0xc0, 0x48, 0x81,
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0xc4, 0x98, 0x00, 0x00, 0x00, 0xc3, 0xcc, 0xcc, 0x48, 0x81, 0xec, 0x98,
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0x00, 0x00, 0x00, 0xb8, 0x75, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24,
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0x38, 0xb8, 0x73, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x3a, 0xb8,
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0x65, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x3c, 0xb8, 0x72, 0x00,
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0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x3e, 0xb8, 0x33, 0x00, 0x00, 0x00,
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0x66, 0x89, 0x44, 0x24, 0x40, 0xb8, 0x32, 0x00, 0x00, 0x00, 0x66, 0x89,
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0x44, 0x24, 0x42, 0xb8, 0x2e, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24,
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0x44, 0xb8, 0x64, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x46, 0xb8,
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0x6c, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x48, 0xb8, 0x6c, 0x00,
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0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x4a, 0x33, 0xc0, 0x66, 0x89, 0x44,
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0x24, 0x4c, 0xb8, 0x53, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x20,
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0xb8, 0x68, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x22, 0xb8, 0x65,
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0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x24, 0xb8, 0x6c, 0x00, 0x00,
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0x00, 0x66, 0x89, 0x44, 0x24, 0x26, 0xb8, 0x6c, 0x00, 0x00, 0x00, 0x66,
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0x89, 0x44, 0x24, 0x28, 0xb8, 0x63, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44,
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0x24, 0x2a, 0xb8, 0x6f, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x2c,
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0xb8, 0x64, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x2e, 0xb8, 0x65,
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0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x30, 0x33, 0xc0, 0x66, 0x89,
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0x44, 0x24, 0x32, 0xb8, 0x45, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24,
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0x50, 0xb8, 0x78, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x52, 0xb8,
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0x65, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x54, 0xb8, 0x63, 0x00,
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0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x56, 0xb8, 0x75, 0x00, 0x00, 0x00,
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0x66, 0x89, 0x44, 0x24, 0x58, 0xb8, 0x74, 0x00, 0x00, 0x00, 0x66, 0x89,
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0x44, 0x24, 0x5a, 0xb8, 0x65, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24,
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0x5c, 0xb8, 0x64, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x5e, 0xb8,
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0x20, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x60, 0xb8, 0x73, 0x00,
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0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x62, 0xb8, 0x68, 0x00, 0x00, 0x00,
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0x66, 0x89, 0x44, 0x24, 0x64, 0xb8, 0x65, 0x00, 0x00, 0x00, 0x66, 0x89,
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0x44, 0x24, 0x66, 0xb8, 0x6c, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24,
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0x68, 0xb8, 0x6c, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x6a, 0xb8,
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0x63, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x6c, 0xb8, 0x6f, 0x00,
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0x00, 0x00, 0x66, 0x89, 0x44, 0x24, 0x6e, 0xb8, 0x64, 0x00, 0x00, 0x00,
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0x66, 0x89, 0x44, 0x24, 0x70, 0xb8, 0x65, 0x00, 0x00, 0x00, 0x66, 0x89,
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0x44, 0x24, 0x72, 0xb8, 0x21, 0x00, 0x00, 0x00, 0x66, 0x89, 0x44, 0x24,
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0x74, 0x33, 0xc0, 0x66, 0x89, 0x44, 0x24, 0x76, 0xc7, 0x44, 0x24, 0x78,
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0xa3, 0x10, 0xb7, 0xf8, 0xb9, 0xa3, 0x10, 0xb7, 0xf8, 0xe8, 0x7a, 0xfc,
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0xff, 0xff, 0x48, 0x89, 0x84, 0x24, 0x80, 0x00, 0x00, 0x00, 0x48, 0x8d,
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0x4c, 0x24, 0x38, 0xff, 0x94, 0x24, 0x80, 0x00, 0x00, 0x00, 0xc7, 0x44,
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0x24, 0x7c, 0xb4, 0x78, 0x78, 0xcd, 0xb9, 0xb4, 0x78, 0x78, 0xcd, 0xe8,
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0x54, 0xfc, 0xff, 0xff, 0x48, 0x89, 0x84, 0x24, 0x88, 0x00, 0x00, 0x00,
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0x45, 0x33, 0xc9, 0x4c, 0x8d, 0x44, 0x24, 0x20, 0x48, 0x8d, 0x54, 0x24,
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0x50, 0x33, 0xc9, 0xff, 0x94, 0x24, 0x88, 0x00, 0x00, 0x00, 0x48, 0x81,
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0xc4, 0x98, 0x00, 0x00, 0x00, 0xc3, 0xcc, 0xcc]
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# Example usage
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when isMainModule:
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dinvokeDefine(
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ZwProtectVirtualMemory,
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"ntdll.dll",
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proc (ProcessHandle: Handle, BaseAddress: PVOID, NumberOfBytesToProtect: PULONG, NewAccessProtection: ULONG, OldAccessProtection: PULONG): NTSTATUS {.stdcall.}
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)
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dinvokeDefine(
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ZwAllocateVirtualMemory,
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"ntdll.dll",
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proc (ProcessHandle: Handle, BaseAddress: PVOID, ZeroBits: ULONG_PTR, RegionSize: PSIZE_T, AllocationType: ULONG, Protect: ULONG): NTSTATUS {.stdcall.}
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)
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dinvokeDefine(
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ZwWriteVirtualMemory,
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"ntdll.dll",
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proc (ProcessHandle: Handle, BaseAddress: PVOID, Buffer: PVOID, NumberOfBytesToWrite: ULONG, NumberOfBytesWritten: PULONG): NTSTATUS {.stdcall.}
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)
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dinvokeDefine(
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ZwCreateThreadEx,
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"ntdll.dll",
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proc (ThreadHandle: PHANDLE, DesiredAccess: ACCESS_MASK, ObjectAttributes: POBJECT_ATTRIBUTES, ProcessHandle: HANDLE, StartRoutine: PUSER_THREAD_START_ROUTINE, Argument: PVOID, CreateFlags: ULONG, ZeroBits: SIZE_T, StackSize: SIZE_T, MaximumStackSize: SIZE_T, AttributeList: PPS_ATTRIBUTE_LIST): NTSTATUS {.stdcall.}
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)
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dinvokeDefine(
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ZwWaitForSingleObject,
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"ntdll.dll",
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proc (ThreadHandle: HANDLE, Alertable: BOOLEAN, Timeout: PLARGE_INTEGER): NTSTATUS {.stdcall.}
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)
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var
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hProcess: HANDLE = 0xFFFFFFFFFFFFFFFF # current process
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shellcodeSize: SIZE_T = shellcode.len.SIZE_T
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baseAddr: PVOID
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status = ZwAllocateVirtualMemory(hProcess, &baseAddr, 0, &shellcodeSize, MEM_RESERVE or MEM_COMMIT, PAGE_READWRITE)
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bytesWritten: SIZE_T
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# ZwWriteVirtualMemory
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status = ZwWriteVirtualMemory(hProcess, baseAddr, &shellcode[0], shellcodeSize.ULONG, cast[PULONG](&bytesWritten))
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# ZwProtectVirtualMemory
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var oldProtect: DWORD
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status = ZwProtectVirtualMemory(hProcess, &baseAddr, cast[PULONG](&shellcodeSize), PAGE_EXECUTE_READ, &oldProtect)
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# ZwCreateThreadEx
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var hThread: HANDLE
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status = ZwCreateThreadEx(&hThread, GENERIC_EXECUTE, NULL, hProcess, cast[PUSER_THREAD_START_ROUTINE](baseAddr), NULL, FALSE, cast[SIZE_T](NULL), cast[SIZE_T](NULL), cast[SIZE_T](NULL), cast[PPS_ATTRIBUTE_LIST](NULL))
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discard NtWaitForSingleObject(hThread, FALSE, cast[PLARGE_INTEGER](0))
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