Bang nhung tai khoan Yahoo Messenger danh cap duoc, ke lua dao tro chuyen voi
ban be nan nhan, khai thac thong tin va nho mua ho the nap tien dien thoai. Dong
thoi, chung phat tan link website co chua ma doc de tiep tuc pham toi.
Anh Vu Trung Nghia, mot nan nhan cua tro lua dao truc tuyen
moi nay, da gui e-mail chia se voi VnExpress ve viec anh nhan duoc
duong link download file http://files.myopera.com/em .../tracnghiem.exe tu nguoi
ban. Mot thoi gian sau khi chay file nay, anh bat ngo nhan duoc loi nhan ve viec
thanh toan nhung the cao dien thoai nho mua truoc do ma anh khong he biet. Vai
nguoi khac than phien bi mat mat khau e-mail sau khi anh “dung nho vi hop thu to
day qua” du anh chang muon cua ai. Hoi lai Nghia moi biet nhung "yeu cau giup do"
tren deu xuat phat tu tin nhan tu nickname YM cua minh ma anh khong biet.
 Theo mo ta cua Nghia, nguoi ban cua anh co ke lai rang hacker
cung co “khuc dao dau” tham hoi, lan la do chuyen roi moi de nghi mua giup the
cao hoac sim dien thoai co menh gia tu 300 - 500 nghin dong roi gui day so bi
mat cho han. Mot vai nguoi da tro thanh nan nhan vi tuong ban minh dang gap kho
khan that.
Phan tich cua Trung tam an ninh mang Bach Khoa (BKIS) cho thay
cong cu pham toi la cac phan mem Trojan dang keylogger (ghi ma ban phim va chuot)
co kich thuoc sieu nho, chi khoang 40 KB, duoc cai san tren website cua hacker
va nguy trang duoi dang 1 file ca nhac hoac trac nghiem giai tri. Khi nan nhan
chay chuong trinh, Trojan se xam nhap vao may tinh duoi cai ten explore.exe
trong thu muc he thong, dong thoi tao them file explorer.dll de ghi lai toan bo
cac thao tac ban phim va chuot cua nguoi su dung, thay doi thong so trong he
thong Registry cua Windows de tu dong chay moi lan khoi dong. Sau khi kiem soat
duoc he thong, Trojan tu dong gui toan bo thao tac cua nguoi dung vao e-mail cua
hacker.
“Nhu vay, hacker co toan bo tai khoan va mat khau ma nan nhan
dang dung tren may tinh cua minh chu khong chi Yahoo Messenger”, ong Vu Ngoc Son,
Truong phong virus BKIS, phan tich. “Co duoc ca kho mat khau, tin tac do tim
tren may tinh cua chung va tien hanh cac thu doan lua dao”.
Ong Son cho biet Trojan nay khong phuc tap ve ky thuat, nhung
“manh lua” cua nhung ke su dung chung thi dang ke boi de dang noi chuyen ma
khong gay nghi ngo cho nan nhan. Nguoi dung co the tai phien
ban Bkav983 moi cap nhat ngay 26/1 da co the loai bo Trojan nay khoi may.
Tro lua dao nay moi xuat hien va chua co thong ke chinh thuc. Tuy nhien, cac
chuyen gia an ninh mang cung de xuat nguoi dung nen canh giac hon trong thoi
gian sap toi vi cac bien the cua chung.
Hung Hai (VnExpress) Article source http://w4rum.com/484.t
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