{"id":32907,"date":"2014-01-30T11:21:38","date_gmt":"2014-01-30T19:21:38","guid":{"rendered":"http:\/\/blogs.mcafee.com\/?p=32907"},"modified":"2025-08-08T01:02:45","modified_gmt":"2025-08-08T08:02:45","slug":"dangerous-chat-friend-finder-apps-google-play-leaking-personal-information","status":"publish","type":"post","link":"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/","title":{"rendered":"Chat Friend Finder Apps on Google Play Leak Personal Information"},"content":{"rendered":"<p>Somewhat controversial websites or apps called chat friend finders, or ID BBS (Bulletin Board System) are spreading widely in Japan. They allow users of well-known communication services like LINE and Kakao Talk to make friends with others by publishing profiles and service IDs, yet without disclosing real phone numbers and email addresses. Such sites and apps are not officially supported by the service operators and are usually discouraged, due to the potential danger. It appears that some users are being involved in crimes caused by criminal &#8220;friends.&#8221;<\/p>\n<h2>The Dangerous Chat Finder App<\/h2>\n<p>McAfee Labs has recently found suspicious chat friend finder apps on Google Play that target Android device users. These apps allow users to register and publish their IDs for several well-known communication services but at the same time secretly leak personal information such as phone numbers and Google account names (Gmail addresses in most cases).<\/p>\n<p><a href=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-1.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-32909\" src=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-1.png\" alt=\"chatleaker-f-1\" width=\"569\" height=\"262\" srcset=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-1.png 569w, https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-1-300x138.png 300w\" sizes=\"auto, (max-width: 569px) 100vw, 569px\" \/><\/a><br \/>\n<em>Figure.1: Chat friend finder apps on Google Play that leak personal information.<\/em><\/p>\n<p>Some of these apps seem to mainly target Japanese users because they support a Japanese interface, as well as some other languages, and also support a Japanese-specific communication service like Mixi. On the other hand, we guess that the apps were created by Korean-speaking developer(s) because the Japanese is sometimes unnatural and we can see Korean chat messages. Plus, the common server used by all of these apps appears to be located in South Korea, according to its IP address.<\/p>\n<p>The contents of the apps description page on Google Play look as if they were copied and pasted or reused from similar Japanese apps with slight modifications. For example, the page says users should accept the terms and conditions in the app\u2019s dialog box at initial launch&#8211;yet there is no dialog box. We doubt these apps are carefully or securely designed.<\/p>\n<p><a href=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-2.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-32910\" src=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-2.png\" alt=\"chatleaker-f-2\" width=\"288\" height=\"512\" srcset=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-2.png 288w, https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-2-168x300.png 168w\" sizes=\"auto, (max-width: 288px) 100vw, 288px\" \/><\/a><br \/>\n<em> Figure.2: An example of a dangerous chat friend finder app.<\/em><\/p>\n<p>One of these apps allows users to publish their service IDs for LINE, Kakao, Mixi, and Skype as well as profile information like photograph, nickname, gender, and residential area. These pieces of information are disclosed to other users on the apps, enabling one to approach or to be approached by others. The apps also support chatting.<\/p>\n<p>However, these apps secretly send users&#8217; phone numbers, email addresses (Google account name), IMEI, and SIM serial numbers to a server managed by the app developer. Clearly, there is higher risk in storing personal information like phone numbers and email addresses in a form associated with various service IDs, public profile information, and chat contents than in storing that data separately. Once this data is leaked, malicious parties can approach specific users using their phone numbers or email addresses, and knowing the victims&#8217; preferences or activities in various communication services.<\/p>\n<p>The secretly collected personal information and its association with various IDs and user profile information are not disclosed to users. As always, there are risks that security vulnerabilities in the apps or their data management server could cause the information to leak to malicious third parties.<\/p>\n<p><a href=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-3.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-32911\" src=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-3.png\" alt=\"chatleaker-f-3\" width=\"581\" height=\"512\" srcset=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-3.png 581w, https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-3-300x264.png 300w\" sizes=\"auto, (max-width: 581px) 100vw, 581px\" \/><\/a><br \/>\n<em> Figure.3: Chat friend candidate list and user profile registration screens.<\/em><\/p>\n<p>At installation these apps request many kinds of permissions. These requests seem excessive for the functions of the apps. The dangerous information leak is related to only two requests: READ_PHONE_STATE and GET_ACCOUNTS. The remaining requests appear to be used by ad modules in the apps or may be unused.<\/p>\n<p>Users should be very careful about permissions requested by Android apps, and also confirm that the app provider is trustworthy before providing any permissions.<\/p>\n<p><a href=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-4.png\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-32912\" src=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-4.png\" alt=\"chatleaker-f-4\" width=\"437\" height=\"385\" srcset=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-4.png 437w, https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-4-300x264.png 300w\" sizes=\"auto, (max-width: 437px) 100vw, 437px\" \/><\/a><br \/>\n<em> Figure.4: These apps request many kinds of permissions.<\/em><\/p>\n<p>Using chat ID BBS sites or apps, even without information leaks, is dangerous. These new apps will expose careless users to much higher risks of having their personal information associated with anonymous IDs and various messaging services. If users really want to use chat ID BBSs, we recommend that they visit simple websites rather than use apps to prevent unnecessary information leaks.<\/p>\n<p><a title=\"McAfee Mobile Security\" href=\"https:\/\/www.mcafeemobilesecurity.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">McAfee Mobile Security<\/a> detects these suspicious apps as Android\/ChatLeaker.F.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Somewhat controversial websites or apps called chat friend finders, or ID BBS (Bulletin Board System) are spreading widely in Japan&#8230;.<\/p>\n","protected":false},"author":631,"featured_media":76859,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1838,442],"tags":[37,142,214],"coauthors":[3220],"class_list":["post-32907","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mobile-security","category-mcafee-labs","tag-android","tag-tag-identity-theft","tag-mobile-security1"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.4 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Chat Friend Finder Apps on Google Play Leak Personal Information | McAfee Blog<\/title>\n<meta name=\"description\" content=\"Somewhat controversial websites or apps called chat friend finders, or ID BBS (Bulletin Board System) are spreading widely in Japan. They allow users of\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chat Friend Finder Apps on Google Play Leak Personal Information | McAfee Blog\" \/>\n<meta property=\"og:description\" content=\"Somewhat controversial websites or apps called chat friend finders, or ID BBS (Bulletin Board System) are spreading widely in Japan. They allow users of\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/\" \/>\n<meta property=\"og:site_name\" content=\"McAfee Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/McAfee\/\" \/>\n<meta property=\"article:published_time\" content=\"2014-01-30T19:21:38+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-08-08T08:02:45+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/chatleaker-f-1.png\" \/>\n\t<meta property=\"og:image:width\" content=\"569\" \/>\n\t<meta property=\"og:image:height\" content=\"262\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Daisuke Nakajima\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@McAfee\" \/>\n<meta name=\"twitter:site\" content=\"@McAfee\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Daisuke Nakajima\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/\"},\"author\":{\"name\":\"Daisuke Nakajima\",\"@id\":\"https:\/\/www.mcafee.com\/blogs\/#\/schema\/person\/18bbfc32a1b7bde3974191e65de956d6\"},\"headline\":\"Chat Friend Finder Apps on Google Play Leak Personal Information\",\"datePublished\":\"2014-01-30T19:21:38+00:00\",\"dateModified\":\"2025-08-08T08:02:45+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/\"},\"wordCount\":681,\"publisher\":{\"@id\":\"https:\/\/www.mcafee.com\/blogs\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/2017\/08\/Friends-mobile-addicted-interior-scene-from-above-1920-1.jpg\",\"keywords\":[\"android\",\"identity theft\",\"mobile security\"],\"articleSection\":[\"Mobile Security\",\"McAfee Labs\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/\",\"url\":\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/\",\"name\":\"Chat Friend Finder Apps on Google Play Leak Personal Information | McAfee Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.mcafee.com\/blogs\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.mcafee.com\/blogs\/other-blogs\/mcafee-labs\/dangerous-chat-friend-finder-apps-google-play-leaking-personal-information\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.mcafee.com\/blogs\/wp-content\/uploads\/2017\/08\/Friends-mobile-addicted-interior-scene-from-above-1920-1.jpg\",\"datePublished\":\"2014-01-30T19:21:38+00:00\",\"dateModified\":\"2025-08-08T08:02:45+00:00\",\"description\":\"Somewhat controversial websites or apps called chat friend finders, or ID BBS (Bulletin Board System) are spreading widely in Japan. 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