ĐỘT NHẬP BẰNG BACKDOOR

BackDoor la gi?

Backdoor la ten mot cong cu thuoc ho Trojan. Dung nhu ten goi "Backdoor" dich tu tieng anh sang tieng viet co nghia la cua sau. Nguyen ly hoat dong cua cong cu nay kha don gian, khi duoc chay tren may nan nhan, no se thuong truc tren bo nho va mo mot Port (do ta dat, hoac mac dinh)....Cho phep ta de dang dot nhap vao may nan nhan thong qua Port ma no da mo...Ta co the toan quyen dieu khien may nan nhan.

Bay gio chung ta bat dau di vao van de chinh....

Su dung Backdoor nhu the nao ?

Dau tien ban can kiem mot Backdoor tot, co kha nhieu cong cu dang nay tren cac Site Hacker....Tuy nhien toi thay Best nhat van la Sub7 (Ver moi nhat la 2.2). Chay doc Readme de xem Port mac dinh cua no (Port se Open tren may nan nhan cho ta dot nhap). Da so cac Backdoor deu da duoc cau hinh o che do de dung nhat. Tuy nhien neu can ban co the chay file Client de Config lai thong so cho Server, VD: nhu Pass cua Server, doi Port khac....Ban nao con it kinh nghiem thi len dung cac Backdoor co giao dien do hoa cho de dung. Ban nao co kinh nghiem ve Network or Unix thi co the dung cac Backdoor Telnet (khong co giao dien do hoa - tat ca thao tac deu dua tren dong lenh).

Lay nhiem Backdoor vao may nan nhan.

Co rat nhieu cach de lay nhiem Backdoor vao may cua nan nhan. Ban co the dung Godwill, Godmessage, HKC....de nhung Server cua Backdoor vao file *.html (Server phai <=50 KB). Tuy nhien neu Server qua lon thi ban co the dung chuong Downloader, no se downloader server ve may nan nhan va run no tu dia chi chua no ma ta da Config. Sau khi nhung, dang ky mot Site, up no len thanh index.html....Ru nan nhan vao (co rat nhieu cach). OK nan nhan da nhiem.

Lam the nao de dot nhap?

De dot nhap vo may ho thi dieu truoc tien can xac dinh la thoi gian ho Online....Boi vi neu ho khong Online thi cach duy nhat de dot nhap vao nha ho co le la treo tuong vo, pha khoa roi den cho dat may tinh cua ho thoi. Sub7 co tinh nang tuyet voi la no se mail, ICQ, AIM...cho ta khi nao nan nhan Online. Con cac Backdoor khac khong co tinh nang nay thi ban phai dung mot chuong trinh Scanport nhu Scanner chang han. Scan mot day cac IP tren mang voi Port la POrt cua Backdoor. VD: Toi dung Backdoor Undetect no co Port la 777. Toi Scan mot khoang IP voi Port la 777 (co nhieu kha nang Port thuong bi trung voi cac Port ung dung, Port cua Trojan khac...Tuy nhien vi adyla bai viet co tinh huong dan len toi khong de cap den). Neu may nao bi dinh Undetect no se Open Port 777 va bao ve cho toi beit IP cua ho. OK! Biet duoc IP cua ho roi, dieu con lai ban chi viec mo Client cua no ra copy IP cua ho vao, nhan Connect....OK! ban da nam trong tay toan quyen dieu khien may nan nhan khi ho Online.

Mot so tinh nang cua Sub7

Toi khuyen cac ban len dung Sub7 no rat tuyet voi.
- Ngoai quyen dieu khien, lam nhung tro vui ve tren may nan nhan ra no con co the lam nhieu tro khac nua.
- Server cuc nho.
- Lam Plugin va do phu tro.
- De dung.
- Co ho tro Sock 4,5 va Proxy de an danh tung tich khi dot nhap.
- Bien may nan nhan thanh Zombine de ho tro cac cuoc tan cong DOS voi quy mo lon.
- Newbie co the dung GUI, sanh dieu co the dung Console.
....Va con nhieu tinh nang khac toi chua kham pha ra xin de danh cho cac ban.

Back Orifice 2k (BO2k) la mot Backdoor noi tieng, no cung co cac tinh nang tuong tu nhu Sub7 nhung lai hoi kho dung. Tuy nhien neu ban nao am hieu ve Networking va cac giao thuc thi len su dung BO2k vi no co tinh tuy bien kha cao theo yeu cau cua nguoi su dung.

Chuc cac ban thanh cong.