{"id":15732,"date":"2025-11-17T09:04:49","date_gmt":"2025-11-17T03:04:49","guid":{"rendered":"https:\/\/dtasiagroup.com\/phishing-emails-use-invisible-hyphens-to-avoid-detection\/"},"modified":"2026-01-08T15:19:57","modified_gmt":"2026-01-08T09:19:57","slug":"email-lua-dao-su-dung-dau-gach-noi-vo-hinh-de-tranh-bi-phat-hien","status":"publish","type":"post","link":"https:\/\/dtasiagroup.com\/vi\/email-lua-dao-su-dung-dau-gach-noi-vo-hinh-de-tranh-bi-phat-hien\/","title":{"rendered":"Email l\u1eeba \u0111\u1ea3o s\u1eed d\u1ee5ng d\u1ea5u g\u1ea1ch n\u1ed1i v\u00f4 h\u00ecnh \u0111\u1ec3 tr\u00e1nh b\u1ecb ph\u00e1t hi\u1ec7n"},"content":{"rendered":"

\"\"<\/p>\n

M\u1ed9t chi\u1ebfn d\u1ecbch phishing g\u1ea7n \u0111\u00e2y \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n s\u1eed d\u1ee5ng c\u00e1c k\u00fd t\u1ef1 v\u00f4 h\u00ecnh<\/strong> \u0111\u1ec3 qua m\u1eb7t c\u00e1c b\u1ed9 l\u1ecdc b\u1ea3o m\u1eadt email, theo Jan Kopriva t\u1eeb SANS Internet Storm Center.<\/p>\n

K\u1ebb t\u1ea5n c\u00f4ng ch\u00e8n d\u1ea5u g\u1ea1ch n\u1ed1i m\u1ec1m (soft hyphen)<\/strong> v\u00e0o d\u00f2ng ti\u00eau \u0111\u1ec1 \u2014 c\u1ee5 th\u1ec3 trong c\u1ee5m t\u1eeb \u201cYour Password is About to Expire\u201d<\/em>. Nh\u1eefng k\u00fd t\u1ef1 n\u00e0y l\u00e0m gi\u00e1n \u0111o\u1ea1n c\u01a1 ch\u1ebf ph\u00e1t hi\u1ec7n d\u1ef1a tr\u00ean t\u1eeb kh\u00f3a c\u1ee7a c\u00e1c c\u00f4ng c\u1ee5 b\u1ea3o m\u1eadt, nh\u01b0ng l\u1ea1i kh\u00f4ng hi\u1ec3n th\u1ecb trong h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng email. \u0110\u1ed1i v\u1edbi ng\u01b0\u1eddi d\u00f9ng, d\u00f2ng ti\u00eau \u0111\u1ec1 tr\u00f4ng ho\u00e0n to\u00e0n b\u00ecnh th\u01b0\u1eddng.<\/p>\n

Kopriva gi\u1ea3i th\u00edch r\u1eb1ng m\u1eb7c d\u00f9 soft hyphen kh\u00f4ng ho\u00e0n to\u00e0n l\u00e0 k\u00fd t\u1ef1 v\u00f4 h\u00ecnh v\u1ec1 m\u1eb7t k\u1ef9 thu\u1eadt, nh\u01b0ng \u201cOutlook c\u0169ng nh\u01b0 h\u1ea7u h\u1ebft c\u00e1c tr\u00ecnh email kh\u00e1c kh\u00f4ng hi\u1ec3n th\u1ecb ch\u00fang th\u00e0nh v\u0103n b\u1ea3n nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c trong \u0111a s\u1ed1 tr\u01b0\u1eddng h\u1ee3p.\u201d B\u1eb1ng c\u00e1ch k\u1ebft h\u1ee3p c\u00e1c k\u00fd t\u1ef1 n\u00e0y v\u1edbi k\u1ef9 thu\u1eadt chia nh\u1ecf ti\u00eau \u0111\u1ec1 th\u00e0nh nhi\u1ec1u t\u1eeb \u0111\u01b0\u1ee3c m\u00e3 h\u00f3a theo MIME, k\u1ebb t\u1ea5n c\u00f4ng c\u1ed1 t\u00ecnh n\u00e9 tr\u00e1nh c\u00e1c b\u1ed9 l\u1ecdc t\u1ef1 \u0111\u1ed9ng \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 ph\u00e1t hi\u1ec7n th\u01b0 \u0111\u1ed9c h\u1ea1i.<\/p>\n

Ph\u1ea7n n\u1ed9i dung email c\u0169ng ch\u1ee9a d\u00e0y \u0111\u1eb7c c\u00e1c soft hyphen \u1ea9n. Con ng\u01b0\u1eddi s\u1ebd \u0111\u1ecdc th\u1ea5y m\u1ed9t th\u00f4ng b\u00e1o \u0111\u1eb7t l\u1ea1i m\u1eadt kh\u1ea9u quen thu\u1ed9c, nh\u01b0ng c\u00e1c h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt l\u1ea1i nh\u00ecn th\u1ea5y v\u0103n b\u1ea3n b\u1ecb chia c\u1eaft b\u1edfi nh\u1eefng k\u00fd t\u1ef1 v\u00f4 h\u00ecnh \u2014 khi\u1ebfn vi\u1ec7c ph\u00e1t hi\u1ec7n tr\u1edf n\u00ean kh\u00f3 kh\u0103n h\u01a1n nhi\u1ec1u.<\/p>\n

Kopriva l\u01b0u \u00fd r\u1eb1ng d\u00f9 vi\u1ec7c s\u1eed d\u1ee5ng k\u00fd t\u1ef1 v\u00f4 h\u00ecnh trong email phishing kh\u00e1 ph\u1ed5 bi\u1ebfn, th\u00ec \u201cvi\u1ec7c \u00e1p d\u1ee5ng k\u1ef9 thu\u1eadt n\u00e0y ngay c\u1ea3 \u1edf ph\u1ea7n ti\u00eau \u0111\u1ec1 c\u1ee7a email l\u00e0 \u0111i\u1ec1u kh\u00e1 b\u1ea5t th\u01b0\u1eddng.\u201d<\/p>\n

N\u1ebfu ng\u01b0\u1eddi d\u00f9ng nh\u1ea5p v\u00e0o li\u00ean k\u1ebft trong email, h\u1ecd s\u1ebd b\u1ecb chuy\u1ec3n h\u01b0\u1edbng \u0111\u1ebfn m\u1ed9t trang \u0111\u0103ng nh\u1eadp gi\u1ea3 m\u1ea1o \u0111\u01b0\u1ee3c t\u1ea1o ra nh\u1eb1m thu th\u1eadp th\u00f4ng tin x\u00e1c th\u1ef1c.<\/p>\n

Chi\u1ebfn d\u1ecbch n\u00e0y cho th\u1ea5y c\u00e1ch k\u1ebb t\u1ea5n c\u00f4ng li\u00ean t\u1ee5c ti\u1ebfn h\u00f3a chi\u1ebfn thu\u1eadt \u0111\u1ec3 v\u01b0\u1ee3t qua c\u00e1c bi\u1ec7n ph\u00e1p ph\u00f2ng v\u1ec7 v\u00e0 nh\u1eafm tr\u1ef1c ti\u1ebfp v\u00e0o ng\u01b0\u1eddi d\u00f9ng. \u0110\u00e0o t\u1ea1o n\u00e2ng cao nh\u1eadn th\u1ee9c b\u1ea3o m\u1eadt d\u1ef1a tr\u00ean AI<\/strong> c\u00f3 th\u1ec3 gi\u00fap t\u1ed5 ch\u1ee9c t\u0103ng kh\u1ea3 n\u0103ng ch\u1ed1ng ch\u1ecbu tr\u01b0\u1edbc c\u00e1c m\u1ed1i \u0111e d\u1ecda n\u00e0y. KnowBe4 h\u1ed7 tr\u1ee3 nh\u00e2n vi\u00ean nh\u1eadn di\u1ec7n v\u00e0 tr\u00e1nh c\u00e1c cu\u1ed9c t\u1ea5n c\u00f4ng k\u1ef9 ngh\u1ec7 x\u00e3 h\u1ed9i, gi\u00fap h\u01a1n 70.000 t\u1ed5 ch\u1ee9c tr\u00ean to\u00e0n c\u1ea7u x\u00e2y d\u1ef1ng v\u0103n h\u00f3a an ninh v\u1eefng m\u1ea1nh v\u00e0 gi\u1ea3m thi\u1ec3u r\u1ee7i ro do con ng\u01b0\u1eddi g\u00e2y ra.<\/p>\n

 <\/p>\n

DT Asia<\/strong><\/p>\n

DT Asia \u0111\u01b0\u1ee3c th\u00e0nh l\u1eadp n\u0103m 2007 v\u1edbi s\u1ee9 m\u1ec7nh \u0111\u01b0a c\u00e1c gi\u1ea3i ph\u00e1p b\u1ea3o m\u1eadt CNTT ti\u00ean phong kh\u00e1c nhau t\u1eeb Hoa K\u1ef3, Ch\u00e2u \u00c2u v\u00e0 Israel gia nh\u1eadp th\u1ecb tr\u01b0\u1eddng.<\/p>\n

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Hi\u1ec7n t\u1ea1i, DT Asia \u0111\u00e3 l\u00e0 m\u1ed9t nh\u00e0 ph\u00e2n ph\u1ed1i gi\u00e1 tr\u1ecb gia t\u0103ng trong khu v\u1ef1c \u0111\u1ed1i v\u1edbi c\u00e1c gi\u1ea3i ph\u00e1p an ninh m\u1ea1ng, cung c\u1ea5p c\u00f4ng ngh\u1ec7 ti\u00ean ti\u1ebfn cho c\u00e1c t\u1ed5 ch\u1ee9c ch\u00ednh ph\u1ee7 tr\u1ecdng y\u1ebfu c\u0169ng nh\u01b0 c\u00e1c kh\u00e1ch h\u00e0ng t\u01b0 nh\u00e2n l\u1edbn bao g\u1ed3m c\u00e1c ng\u00e2n h\u00e0ng to\u00e0n c\u1ea7u v\u00e0 c\u00e1c c\u00f4ng ty trong danh s\u00e1ch Fortune 500. V\u1edbi c\u00e1c v\u0103n ph\u00f2ng v\u00e0 \u0111\u1ed1i t\u00e1c r\u1ed9ng kh\u1eafp trong khu v\u1ef1c Ch\u00e2u \u00c1 Th\u00e1i B\u00ecnh D\u01b0\u01a1ng, ch\u00fang t\u00f4i hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 th\u1ecb tr\u01b0\u1eddng v\u00e0 t\u1eeb \u0111\u00f3 mang \u0111\u1ebfn nh\u1eefng gi\u1ea3i ph\u00e1p b\u1ea3n \u0111\u1ecba h\u00f3a ph\u00f9 h\u1ee3p v\u1edbi t\u1eebng qu\u1ed1c gia, t\u1eebng t\u1ed5 ch\u1ee9c.<\/p>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n

\u00a0<\/strong><\/p>\n

C\u00e1ch ch\u00fang t\u00f4i c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n<\/strong><\/p>\n

N\u1ebfu b\u1ea1n mu\u1ed1n bi\u1ebft th\u00eam v\u1ec1 Email l\u1eeba \u0111\u1ea3o s\u1eed d\u1ee5ng d\u1ea5u g\u1ea1ch n\u1ed1i v\u00f4 h\u00ecnh \u0111\u1ec3 tr\u00e1nh b\u1ecb ph\u00e1t hi\u1ec7n, ch\u00fang t\u00f4i s\u1eb5n s\u00e0ng gi\u00fap \u0111\u1ee1! DT Asia l\u00e0 nh\u00e0 ph\u00e2n ph\u1ed1i c\u1ee7a Knowbe4, \u0111\u1eb7c bi\u1ec7t t\u1ea1i Vi\u1ec7t Nam v\u00e0 ch\u00e2u \u00c1, c\u00e1c k\u1ef9 thu\u1eadt vi\u00ean c\u1ee7a ch\u00fang t\u00f4i c\u00f3 kinh nghi\u1ec7m s\u00e2u r\u1ed9ng v\u1ec1 s\u1ea3n ph\u1ea9m v\u00e0 c\u00e1c c\u00f4ng ngh\u1ec7 li\u00ean quan m\u00e0 b\u1ea1n lu\u00f4n c\u00f3 th\u1ec3 tin t\u01b0\u1edfng. Ch\u00fang t\u00f4i cung c\u1ea5p c\u00e1c gi\u1ea3i ph\u00e1p tr\u1ecdn g\u00f3i cho s\u1ea3n ph\u1ea9m n\u00e0y, bao g\u1ed3m t\u01b0 v\u1ea5n, tri\u1ec3n khai v\u00e0 d\u1ecbch v\u1ee5 b\u1ea3o tr\u00ec.<\/p>\n

\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin chi ti\u1ebft v\u00e0 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3, vui l\u00f2ng truy c\u1eadp: https:\/\/dtasiagroup.com\/knowbe4\/<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

M\u1ed9t chi\u1ebfn d\u1ecbch phishing g\u1ea7n \u0111\u00e2y \u0111\u00e3 \u0111\u01b0\u1ee3c ph\u00e1t hi\u1ec7n s\u1eed d\u1ee5ng c\u00e1c k\u00fd t\u1ef1 v\u00f4 h\u00ecnh \u0111\u1ec3 qua m\u1eb7t c\u00e1c b\u1ed9 l\u1ecdc b\u1ea3o m\u1eadt email, theo Jan Kopriva t\u1eeb SANS Internet Storm Center.<\/p>\n","protected":false},"author":11,"featured_media":15564,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[79,66,63],"tags":[],"class_list":["post-15732","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bai-viet","category-news-vi","category-announcements-vi"],"_links":{"self":[{"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/posts\/15732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/comments?post=15732"}],"version-history":[{"count":3,"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/posts\/15732\/revisions"}],"predecessor-version":[{"id":15733,"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/posts\/15732\/revisions\/15733"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/media\/15564"}],"wp:attachment":[{"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/media?parent=15732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/categories?post=15732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/dtasiagroup.com\/vi\/wp-json\/wp\/v2\/tags?post=15732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}