Khoang hai ngay nay, xuat hien hang loat email gia mao dia
chi mail cua Trung tam Internet Viet Nam (VNNIC) gui di cac thong bao canh bao
virus, nhung ban than cac buc mail nay lai chua ma doc trong file dinh kem nham
tan cong nguoi dung.
Noi dung email nhu sau:
"Trung tam internet Viet Nam (VNNIC) xin thong bao cac co quan, gan day
chung toi phat hien co mot loai virus nguy hiem gia danh dia chi email phat tan
khien 5.500 may tinh tai cac co quan nha nuoc bi nhiem... Chung toi xin gui kem
danh sach email nguy hiem trong file dinh kem"
Hinh anh buc mail gia mao thong bao cua VNNIC de phat tan Virus tan cong nguoi
dung
Dia chi gui tu buc mail co
noi dung nhu tren de ro la VNNIC , nhung thuc te, day la mot email gia mao!
File dinh kem ma buc mail gia mao giai thich la "danh sach email nguy hiem" thuc
chat lai la mot virus co ten Dropper.Mdrop.AC.
Cac khuyen cao khi tuong tac voi email co file dinh kem:
- Canh giac voi cac file dinh kem ma minh khong yeu cau, tham chi cac file
do duoc gui tu nguoi quen – Vi mot email co dia chi nguoi gui la quen biet
khong co nghia la no duoc gui tu chinh nguoi do. Neu co the, hay kiem tra
tinh xac thuc tu phia nguoi gui truoc khi mo file dinh kem.
Can than voi cac thong diep tu cac ISP, cac hang phan mem, cac cong ty Game
online,… yeu cau mo hay cai dat cac file dinh kem theo. Cac cong ty, to chuc
nay khong gui phan mem qua email ma luon yeu cau tai truc tiep tu web site
chinh thuc cua ho.
- Luu va quet bat cu file dinh kem nao truoc khi mo chung
- Neu phai mo mot file dinh kem truoc khi ban co the xac thuc nguon goc, lam
cac buoc sau day:
(1) Dam bao phan mem chong virus duoc cap
nhat gan nhat.
(2) Luu file vao may tinh hoac mot o dia nao do.
(3) Quet file do mot cach thu cong su dung phan mem diet virus.
(4) Mo file.
Tat tinh
nang tu dong tai cac file dinh kem cua cac phan mem doc mail.
- Xem xet them cac bien phap khac – Loc cac kieu file dinh kem su dung cac
tuy chon gioi han kieu file dinh kem cua phan mem email hoac su dung mot
firewall.
Nguon: VNCERT |
Ngay sau khi nhan duoc cac thong tin thong bao ve loai hinh phat tan virus
nhu tren, VietNamNet da co lien he truc tiep voi VNNIC de lam ro su
viec.
Ong Pham Viet Anh - Truong phong Ky thuat dieu hanh cua VNNIC khang dinh: "Day
la mot dang gia mao dia chi email cua VNNIC de phat tan virus".
Dai dien VNNIC cung nhan dinh, loai hinh gia mao dia chi email VNNIC de phat tan
ma doc tan cong nguoi dung co the co nhieu hinh thuc khac chu khong chi co mot
noi dung cu the nhu da neu o tren.
Vi the ong Viet Anh nhan manh: "VNNIC chua bao gio gui di cac email lien
quan den canh bao virus! Truoc gio cac email duoc gui di tu VNNIC chu yeu nam
trong chuc nang cua trung tam la lien quan den van de ten mien nhu Thong bao het
han duy tri ten mien, hoac email lien he voi cac chu the ten mien khi co yeu cau
thay doi, thac mac.v.v."
Ngay sau khi nhan duoc thong tin tu cac khach hang bi nhiem ma doc do nhan duoc
cac mail gia mao nhu tren, VNNIC da co thong bao gui den Trung tam VNCERT (Bo
BCVT), Trung tam BKIS (DH Bach khoa HN) va VietNamNet de dua ra cac thong tin xu
ly kip thoi va canh bao nguoi dung.
Ong Do Ngoc Duy Trac - Truong phong nghiep vu cua VNCERT dua ra khuyen cao: "Viec
hacker gia mao dia chi phan gui di (from) trong email rat de dang, vi the nguoi
dung can het suc can than truoc nhung buc email co noi dung tuong tu (co dia chi
gui di tu VNNIC va co file dinh kem)."
"Neu phat hien cac su co tuong tu, mong moi nguoi thong bao lai voi VNCERT
thong qua email ir@vncert.vn hoac qua so dien thoai 04.9445510. Mot viec nen lam
nua la cac ban hay cap nhat truong trinh antivirus dang co va luon canh giac voi
cac thu doan tuong tu. Hacker co the gia mao dia chi email tu cac cong ty, to
chuc khac..., tham chi ca VNCERT. Doi voi Trung tam VNCERT, chung toi khong bao
gio gui email dinh kem file den nguoi dung va moi email nghiep vu deu su dung
chu ky dien tu tuong thich voi chuan OpenPGP de phia nhan co the kiem tra tinh
xac thuc".
Hien van chua co cac thong ke ve thoi diem chinh xac loai virus tren duoc tung
len mang, so nan nhan bi lay nhiem cung nhu muc do nguy hiem cua loai virus nay.
Tuy nhien, so may tinh bi lay nhiem co the kha lon do thong tin tu VNCERT cho
thay hacker phat tan virus theo dang spam mail - gui thu rac so luong lon vao
tat ca cac doi tuong nguoi dung ma chung co danh sach email.
Theo VietNamNet
Article source http://w4rum.com/1205.t
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