Android Security: Over 150 Security and Privacy Issues Found on Stalkerware

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"dateModified": "2021-08-05T13:18:17-04:00", "publisher": { "@type": "Organization", "name": "Security Intelligence", "logo":{ "@type": "ImageObject", "url": "https://securityintelligence.com/wp-content/themes/security-intelligence/assets/img/logo.png" } }, "image": [ "https://securityintelligence.com/wp-content/uploads/2021/07/Stranger-Danger-630x330.jpeg" ], "articleBody": "Who stalks the stalkers? When it comes to Android security, stalkerware presents a double risk. It's common knowledge that mobile stalkerware undermines a target's privacy. That's kind of the point. A stalkerware incident often involves someone, such as a spouse, gaining physical access to someone's smartphone and installing a monitoring app. They then use that software to remotely track what another person is doing on the device or spy on where they're going. What's not so widely known is that stalkerware vendors don't always code their apps correctly. For instance, <a title="Android stalkerware threatens victims further and exposes snoopers themselves" href="https://www.welivesecurity.com/2021/05/17/android-stalkerware-threatens-victims-further-exposes-snoopers-themselves/" target="_blank" rel="noopener">ESET</a> found over 150 errors in 58 stalkerware Android apps. Those issues not only further compromised targets' Android security and privacy, they also put the snoopers themselves at risk. Read on to learn which weaknesses appeared most frequently in the apps surveyed. <h2>Android Security Stalkerware Problems at a Glance</h2> Out of the 158 issues ESET found, the most common type was insecure transmission of users' personally identifiable information. This category accounted for 22 vulnerabilities, ranking higher than storing sensitive information on external media and exposing sensitive user information to unauthorized access, which account for 19 and 17 weaknesses, respectively. The fourth most prevalent problem, at 17 weaknesses, was server leak of stalker information. ESET found that several stalkerware apps kept information about those using the app to track someone. It also stored a victim's data on a server — even after the stalker requested that the service delete their information. That data might have included more information about the tracker in the event that they had an existing connection with the target. Sometimes, victims' information remained on a stalkerware service's servers even after the snooper removed their account. ESET reported the Android security and privacy issues to the stalkerware vendors as part of its 90-day responsible disclosure policy. As of reporting, only six responded by fixing the issues, while seven said that they were working on a fix. One vendor decided not to fix the reported issues; t<span class=" resolved">he rest didn't respond.</span> <h2>The Growth of Stalkerware</h2> ESET's researchers also found that Android stalkerware detection increased by 48% between 2019 and 2020. This growth has continued into 2021. For example, Avast observed a 93% increase in the volume of spyware and stalkerware app detection over the first two months of the year. That's compared to the same time period in 2020. In response, some digital defense groups took action. For instance, <a href="https://www.eff.org/deeplinks/2020/07/coalition-against-stalkerware-expands-membership" target="_blank" rel="noopener">the Coalition Against Stalkerware</a> developed a standard definition of stalkerware, which encouraged research into the way it spreads. They also created <a title=" KasperskyLab / TinyCheck " href="https://github.com/KasperskyLab/tinycheck" target="_blank" rel="noopener">TinyCheck</a> for the purpose of detecting stalkerware apps, which can pose threats to Android security as well as to other brands of smart phones, in a more efficient manner. <h2>How to Defend Against Stalkerware</h2> The issues discussed above highlight the need for organizations to <a title="When Stalkerware Stalks the Enterprise" href="https://securityintelligence.com/articles/when-stalkerware-stalks-the-enterprise/" target="_blank" rel="noopener">defend themselves against stalkerware</a>. One of the ways they can do that is to educate their employees about what to look for. For example, smart phone users should delete unused apps and look for strange changes on their devices. In addition, never leave your devices unattended. In the event organizations discover stalkerware installed on a connected device, they need to <a title="Don’t Remove Stalkerware Before Reading This Article" href="https://securityintelligence.com/articles/stalkerware-apps-employee/" target="_blank" rel="noopener">approach removal carefully</a>. The best thing to do is to not notify the victim in a way that could be discovered on the compromised device. 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class="dark_background" style="background:black;"></div> <div class="container grid" style="background:black;">  <aside class="breadcrumbs "> <h1 class="breadcrumbs__page_title">Android Security: Over 150 Security and Privacy Issues Found on Stalkerware</h1> </aside> </div> <div class="container grid hero_background "> <div class="grid__content post "> <div class="post__thumbnail"> <amp-img alt="Silhouette of a man walking at the end of a dark, concrete alley towards the light" width="1200" height="630" layout="responsive" src="/wp-content/webp-express/webp-images/doc-root/wp-content/uploads/2021/07/Stranger-Danger-630x330.jpeg.webp" srcset="/wp-content/webp-express/webp-images/doc-root/wp-content/uploads/2021/07/Stranger-Danger-300x158.jpeg.webp 300w, /wp-content/webp-express/webp-images/doc-root/wp-content/uploads/2021/07/Stranger-Danger-630x330.jpeg.webp 630w, /wp-content/webp-express/webp-images/doc-root/wp-content/uploads/2021/07/Stranger-Danger.jpeg.webp 1200w, 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When it comes to Android security, stalkerware presents a double risk.</p> <p>It’s common knowledge that mobile stalkerware undermines a target’s privacy. That’s kind of the point. A stalkerware incident often involves someone, such as a spouse, gaining physical access to someone’s smartphone and installing a monitoring app. They then use that software to remotely track what another person is doing on the device or spy on where they’re going.</p> <p>What’s not so widely known is that stalkerware vendors don’t always code their apps correctly.</p> <p>For instance, <a title="Android stalkerware threatens victims further and exposes snoopers themselves" href="https://www.welivesecurity.com/2021/05/17/android-stalkerware-threatens-victims-further-exposes-snoopers-themselves/" target="_blank" rel="noopener nofollow" target="_blank" rel="noopener nofollow" >ESET</a> found over 150 errors in 58 stalkerware Android apps. Those issues not only further compromised targets’ Android security and privacy, they also put the snoopers themselves at risk.</p> <p>Read on to learn which weaknesses appeared most frequently in the apps surveyed.</p> <h2>Android Security Stalkerware Problems at a Glance</h2> <p>Out of the 158 issues ESET found, the most common type was insecure transmission of users’ personally identifiable information. This category accounted for 22 vulnerabilities, ranking higher than storing sensitive information on external media and exposing sensitive user information to unauthorized access, which account for 19 and 17 weaknesses, respectively.</p> <p>The fourth most prevalent problem, at 17 weaknesses, was server leak of stalker information. ESET found that several stalkerware apps kept information about those using the app to track someone. It also stored a victim’s data on a server — even after the stalker requested that the service delete their information. That data might have included more information about the tracker in the event that they had an existing connection with the target.</p> <p>Sometimes, victims’ information remained on a stalkerware service’s servers even after the snooper removed their account.</p> <p>ESET reported the Android security and privacy issues to the stalkerware vendors as part of its 90-day responsible disclosure policy. As of reporting, only six responded by fixing the issues, while seven said that they were working on a fix. One vendor decided not to fix the reported issues; t<span class=" resolved">he rest didn’t respond.</span></p> <h2>The Growth of Stalkerware</h2> <p>ESET’s researchers also found that Android stalkerware detection increased by 48% between 2019 and 2020. This growth has continued into 2021. For example, Avast observed a 93% increase in the volume of spyware and stalkerware app detection over the first two months of the year. That’s compared to the same time period in 2020.</p> <p>In response, some digital defense groups took action. For instance, <a href="https://www.eff.org/deeplinks/2020/07/coalition-against-stalkerware-expands-membership" target="_blank" rel="noopener nofollow" target="_blank" rel="noopener nofollow" >the Coalition Against Stalkerware</a> developed a standard definition of stalkerware, which encouraged research into the way it spreads. They also created <a title=" KasperskyLab / TinyCheck " href="https://github.com/KasperskyLab/tinycheck" target="_blank" rel="noopener nofollow" target="_blank" rel="noopener nofollow" >TinyCheck</a> for the purpose of detecting stalkerware apps, which can pose threats to Android security as well as to other brands of smart phones, in a more efficient manner.</p> <h2>How to Defend Against Stalkerware</h2> <p>The issues discussed above highlight the need for organizations to <a title="When Stalkerware Stalks the Enterprise" href="https://securityintelligence.com/articles/when-stalkerware-stalks-the-enterprise/" target="_blank" rel="noopener nofollow" >defend themselves against stalkerware</a>. One of the ways they can do that is to educate their employees about what to look for. For example, smart phone users should delete unused apps and look for strange changes on their devices. In addition, never leave your devices unattended.</p> <p>In the event organizations discover stalkerware installed on a connected device, they need to <a title="Don’t Remove Stalkerware Before Reading This Article" href="https://securityintelligence.com/articles/stalkerware-apps-employee/" target="_blank" rel="noopener nofollow" >approach removal carefully</a>. The best thing to do is to not notify the victim in a way that could be discovered on the compromised device. Instead, they should speak to the victim in person and proceed from there.</p> </body></html> <div id="nc_pixel"></div><div class="post__tags"> <a href="https://securityintelligence.com/tag/stalkerware/" rel="tag">stalkerware</a><span> | </span><a href="https://securityintelligence.com/tag/attackers/" rel="tag">attackers</a><span> | </span><a href="https://securityintelligence.com/tag/android/" rel="tag">Android</a><span> | </span><a href="https://securityintelligence.com/tag/android-security/" rel="tag">Android Security</a><span> | </span><a href="https://securityintelligence.com/tag/data-privacy/" rel="tag">Data Privacy</a><span> | </span><a href="https://securityintelligence.com/tag/mobile-app-security/" rel="tag">Mobile App Security</a><span> | </span><a href="https://securityintelligence.com/tag/mobile-security/" rel="tag">Mobile Security</a><span> | </span><a href="https://securityintelligence.com/tag/mobile-threats/" rel="tag">Mobile Threats</a><span> | </span><a href="https://securityintelligence.com/tag/privacy/" rel="tag">Privacy</a></div> <div class="post__author author "> <div class="author__box"> <div class="author__photo" style="background-image: url(https://securityintelligence.com/wp-content/uploads/2018/02/security_photo.jpg);"></div> <div class="author__infos"> <div class="author__name"><a href="https://securityintelligence.com/author/david-bisson/" >David Bisson</a></div> <div class="author__role">Contributing Editor</div> </div> </div> </div>  <style type="text/css"> .post__content--continue_reading{ max-height: 725px; overflow:hidden; transition: max-height cubic-bezier(0.9, 0, 1, 1) 2s; } @media (max-width: 768px) { .post__content--continue_reading{ max-height: 1225px; } } </style> <div class="continue_reading_wrapper" id="continue_reading"> <button on="tap: post__content.toggleClass(class=post__content--continue_reading), continue_reading.toggleClass(class=continue_reading_wrapper--clicked)" tabindex="0" role="button">Continue Reading</button> </div> </main> </div> </div> <aside class="grid__sidebar post__sidebar "> <div class="mobile_divider"></div> <header class="post__sidebar__header">POPULAR</header>  <article class="article article_grid article__mobile--card">  <a class="exclusive_article__category_link" href="https://securityintelligence.com/articles/what-telegrams-recent-policy-shift-means-for-cyber-crime/" aria-label="What Telegram’s recent policy shift means for cyber crime"> <div class="article__img"> <amp-img alt="" width="1200" height="630" layout="responsive" src="/wp-content/webp-express/webp-images/doc-root/wp-content/uploads/2024/11/A-dark-mystery-hand-typing-on-a-laptop-computer-at-night-630x330.jpeg.webp"> <amp-img fallback alt="" width="1200" height="630" layout="responsive" src="https://securityintelligence.com/wp-content/uploads/2024/11/A-dark-mystery-hand-typing-on-a-laptop-computer-at-night-630x330.jpeg"> </amp-img> </amp-img> </div> </a>  <div class="article__text_container" style="-webkit-box-orient: vertical;">  <a class="article__category_link" href="https://securityintelligence.com/category/topics/risk-management/" aria-label="https://securityintelligence.com/category/topics/risk-management/"> Risk Management </a>  <span class="article__date"> November 6, 2024 </span>  <a href="https://securityintelligence.com/articles/what-telegrams-recent-policy-shift-means-for-cyber-crime/" class="article__content_link" aria-label="What Telegram’s recent policy shift means for cyber crime"> <h2 class="article__title">What Telegram’s recent policy shift means for cyber crime</h2> <p class="article__excerpt" style="-webkit-box-orient: vertical;"> <span class="article__read_time"><span class="span-reading-time rt-reading-time"><span class="rt-label rt-prefix"></span> <span class="rt-time"> 4</span> <span class="rt-label rt-postfix">min read</span></span> - </span>Since its launch in August 2013, Telegram has become the go-to messaging app for privacy-focused users. 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This is… </p> </a> </div> </article>  <div class="billboard_wrapper"> <a href="https://www.ibm.com/reports/data-breach?utm_medium=OSocial&utm_source=Blog&utm_content=RSRWW&utm_id=si-blog-right-rail " aria-label="A SPONSORED flag "> <amp-img layout='responsive' widht='300' height='250' src="https://securityintelligence.com/wp-content/uploads/2024/07/SIB_CODB_rightrail_banners2024-think_600x1200.png" alt="CODB right rail banner with red, blue, & purple lines in a wide circular pattern"> </amp-img> </a> </div> </aside> </div> <script> const kaltura = document.querySelectorAll("[data-widget=\"videoplayer\"]") if (kaltura != null) { kaltura.forEach(function(item){ const kId = item.id + '--' + item.dataset.videoid; document.getElementById(item.id).id = kId; getKalturaVideo(item); }) } </script> <div class="card_container_background "> <section class="container cards"> <h3>More from News</h3> <div class="cards__wrapper"> <article class="article article--card cards__article_grid ">  <a class="exclusive_article__category_link" href="https://securityintelligence.com/news/cisa-adds-microsoft-sharepoint-vulnerability-to-kev-catalog/"> <div class="article__img"> <amp-img alt="Closeup profile of a woman leaning into a computer screen reading code that is reflecting on her glasses" width="1200" height="630" layout="responsive" src="/wp-content/webp-express/webp-images/doc-root/wp-content/uploads/2024/11/Close-up-of-programmer-with-binary-code-reflected-in-eyeglasses-630x330.jpeg.webp"> <amp-img fallback alt="Closeup profile of a woman leaning into a computer screen reading code that is reflecting on her glasses" width="1200" height="630" layout="responsive" src="https://securityintelligence.com/wp-content/uploads/2024/11/Close-up-of-programmer-with-binary-code-reflected-in-eyeglasses-630x330.jpeg"> </amp-img> </amp-img> </div> </a>  <div class="article__text_container" style="-webkit-box-orient: vertical;">  <div class="article__eyebrow"> <span class="article__date"> November 25, 2024 </span> </div>  <a href="https://securityintelligence.com/news/cisa-adds-microsoft-sharepoint-vulnerability-to-kev-catalog/" class="article__content_link"> <div class="article__direction"> <h2 class="article__title"> CISA adds Microsoft SharePoint vulnerability to the KEV Catalog </h2> <p class="article__excerpt" style="-webkit-box-orient: vertical;"> <span class="article__read_time"><span class="span-reading-time rt-reading-time"><span class="rt-label rt-prefix"></span> <span class="rt-time"> 3</span> <span class="rt-label rt-postfix">min read</span></span> - </span>In late October, the United States Cybersecurity & Infrastructure Security Agency (CISA) added a new threat to its Known Exploited Vulnerability (KEV) Catalog. 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While the water utility has confirmed that… </p> </div> </a> </div> </article> </div> </section> </div>  <script type="module" src="https://1.www.s81c.com/common/carbon-for-ibm-dotcom/version/v1.31.0-rc.0/cta-section.min.js"></script> <script type="module" src="https://1.www.s81c.com/common/carbon-for-ibm-dotcom/tag/v1/latest/cta-section.min.js"></script> <script type="module" src="https://1.www.s81c.com/common/carbon-for-ibm-dotcom/tag/v1/next/cta-section.min.js"></script> <div style="background-color: #161616;"> <dds-cta-section data-autoid="dds--cta-section" children-custom-class="" class="container SI_padding"> <dds-cta-block no-border="" data-autoid="dds--cta-block"> <dds-content-block-heading class="copy" role="heading" aria-level="2" data-autoid="dds--content-block__heading" slot="heading"> <h2 >Topic updates</h2> </dds-content-block-heading> <dds-content-block-copy data-autoid="dds--content-block__copy" size="md" slot="copy"> <dds-content-block-paragraph data-autoid="dds--content-block-paragraph" class="copy"> Get email updates and stay ahead of the latest threats to the security landscape, thought leadership and research. </dds-content-block-paragraph> <div role="list" class="list_newletter"> <dds-button-cta data-autoid="dds-cta" cta-style="button" class="copy" cta-type="local" href="https://www.ibm.com/account/reg/us-en/signup?formid=news-urx-51966" kind="primary" icon-layout="" size=""> Subscribe today </dds-button-cta> </div> </dds-content-block-copy> </dds-cta-block> </dds-cta-section> </div> <dds-footer-container></dds-footer-container> <script> document.addEventListener('DOMContentLoaded', () => { const boxstyle = document.querySelector('.button2'); 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