Cach nhan dien link gia mao khi truy cap nen tang online

Moi ngay co hon 3,4 ty email gia mao duoc gui di tren toan cau, va theo bao cao cua Anti-Phishing Working Group, so luong link lua dao tang 61% chi trong quy dau nam 2024. Tai Viet Nam, Cuc An toan thong tin ghi nhan hon 12.000 vu tan cong phishing vao cac nen tang thuong mai dien tu va ngan hang so trong nua dau nam nay. Nhung con so nay cho thay viec tu trang bi ky nang nhan dien link gia mao khong con la lua chon ma la yeu cau song con. Tim hieu them tai Xocdia.ink

Mot link gia mao thuong khong xuat hien ngau nhien. Ke tan cong tao ra chung dua tren ky thuat social engineering, loi dung su voi vang hoac thieu canh giac cua nguoi dung. Vi du dien hinh la ban nhan duoc tin nhan tu so la voi noi dung: "Tai khoan Shopee cua ban sap bi khoa, xac thuc ngay tai day". Link dinh kem co the la sh0pee-vn.com hoac shopee-verify.tk. Nhin qua thi giong that, nhung chi can tinh y mot chut, ban se thay ten mien khong phai shopee.vn chinh thong.

Cach nhan dien link gia mao khi truy cap nen tang online bat dau tu viec kiem tra giao thuc HTTPS. Mot trang web uy tin luon co o khoa xanh tren thanh dia chi va bat dau bang https://. Tuy nhien, dung chu quan vi ke xau cung co the mua chung chi SSL voi gia chi 5-10 USD moi nam. Do do, ban can nhin xa hon: click vao o khoa de xem thong tin chung chi co khop voi ten mien hay khong. Mot trang gia mao ngan hang Techcombank co the co o khoa xanh nhung ten to chuc trong chung chi lai la "Fake Company Ltd" thay vi "Techcombank Joint Stock Commercial Bank".

Tiep theo, hay chu y den ten mien cap cao nhat (TLD). Cac nen tang lon nhu Facebook, Google, Lazada thuong dung .com, .vn, .net. Neu ban thay mot duong link dang facebook-login.xyz hoac google-auth.support, do la dau hieu ro rang cua lua dao. Thong ke tu Kaspersky cho thay 87% link doc hai su dung TLD la nhu .tk, .ml, .ga, .cf vi chung thuong mien phi hoac rat re.

Mot ky thuat pho bien khac la su dung subdomain de danh lua mat nguoi dung. Vi du: shopee.vn.ladang.site trong co ve lien quan den Shopee vi chu shopee.vn xuat hien dau tien. Nhung thuc te, ten mien that la ladang.site, con shopee.vn chi la subdomain. Cach nhan dien link gia mao khi truy cap nen tang online trong truong hop nay la doc tu phai sang trai: phan sau dau cham cuoi cung moi la ten mien chinh. Neu phan do khong phai la ten thuong hieu ban dang muon truy cap, hay dung lai ngay.

Khong chi email va tin nhan SMS, link gia mao con xuat hien tran lan tren cac nen tang mang xa hoi. Mot nghien cuu cua Meta vao thang 6/2024 chi ra rang cu 100 bai dang quang cao tren Facebook, co it nhat 3 bai chua link doc hai. Nhung quang cao nay thuong moi goi "Nhan ngay 500.000d vao vi MoMo" hoac "Tang the cao 100.000d cho 1000 nguoi dau tien". Khi click vao, ban duoc dua den mot trang gia mao yeu cau nhap so dien thoai va ma OTP. Mot khi da cung cap, tai khoan cua ban gan nhu mat trang.

De phong tranh, ban nen tu go dia chi web thay vi click vao link. Vi du, khi muon kiem tra don hang tren Tiki, hay mo trinh duyet va go tiki.vn, dung click vao link trong email. Neu bat buoc phai click, hay di chuot len link (khong click) va nhin vao goc trai duoi cung trinh duyet de xem URL thuc su. Ky thuat nay giup ban phat hien ngay nhung link dang bit.ly hoac tinyurl dua den trang la.

Mot dau hieu khac khong the bo qua la loi chinh ta va ngu phap trong noi dung di kem. Cac nen tang chuyen nghiep nhu Vietcombank, VNPT, hay Shopee co doi ngu kiem duyet noi dung, hiem khi gui thong bao voi loi nhu "Tai khoang cua quy khach co dau hieu bat thuong" hay "Vui long cap nhap thong tin". Nhung loi nay la cong cu giup ke lua dao loc ra nguoi dung thieu canh giac, nhung dong thoi cung la tin hieu canh bao cho nguoi tinh y.

Cach nhan dien link gia mao khi truy cap nen tang online con lien quan den thoi gian va tan suat. Neu ban nhan duoc 5 tin nhan tu 3 so khac nhau trong vong 10 phut, tat ca deu yeu cau xac thuc tai khoan ngan hang, do la chien dich tan cong quy mo nho. Cac ngan hang nhu TPBank hay VPBank thuong chi gui toi da 1 tin nhan moi ngay cho mot giao dich cu the. Ho khong bao gio yeu cau ban click vao link de nhap mat khau hay ma OTP.

Trong truong hop ban da vo tinh click vao link gia mao, hay hanh dong ngay lap tuc. Dau tien, khong nhap bat ky thong tin nao. Thu hai, thay doi mat khau cua tat ca tai khoan lien quan trong vong 5 phut. Thu ba, kich hoat xac thuc hai yeu to (2FA) neu chua co. Theo so lieu tu Google, viec bat 2FA giam 99,9% nguy co bi chiem doat tai khoan. Cuoi cung, lien he tong dai ho tro cua nen tang de bao cao va khoa tai khoan tam thoi.

Mot cong cu huu ich ma it nguoi biet den la tinh nang "Safe Browsing" cua Google Chrome. Trinh duyet nay kiem tra hon 1 ty URL moi ngay va canh bao nguoi dung khi truy cap trang doc hai. Tuong tu, Mozilla Firefox co tinh nang "Phishing Protection" cap nhat danh sach den moi 30 phut. Neu ban thay canh bao do tu trinh duyet, dung bo qua du chi mot lan.

Cuoi cung, hay nho rang ke lua dao luon cap nhat ky thuat moi. Nam 2023, chung bat dau su dung AI de tao ra cac email gia mao voi ngu phap hoan hao va noi dung ca nhan hoa dua tren du lieu ro ri. Mot nghien cuu tu Dai hoc Stanford chi ra rang 48% nguoi dung khong the phan biet email gia do AI tao ra voi email that. Do do, cach nhan dien link gia mao khi truy cap nen tang online khong chi dung o kien thuc co ban ma can duoc cap nhat lien tuc. Hay danh 5 phut moi tuan de doc cac canh bao tu Trung tam Ung cuu khan cap khong gian mang Viet Nam (VNCERT/CC). Mot chut can than hom nay co the cuu ban khoi mat hang chuc trieu dong ngay mai. Thong tin chi tiet tai Xocdia.ink