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Shedun is a family of malware software (also known as Kemoge, Shiftybug and Shuanet[1][2][3]) targeting the Android (operating system) first identified in late 2015 by mobile security company Lookout (company), affecting roughly 20,000[4] popular Android applications.[3][5][6][7][8][9] Lookout claimed the HummingBad malware was also a part of the Shedun family, however, these claims were refuted.[10][11]

Avira Protection Labs stated that Shedun family malware is detected to cause approximately 1500-2000 infections per day.[12] All three variants of the virus are known to share roughly ~80% of the same source code.[13][14]

In mid 2016, arstechnica reported that approximately 10.000.000 devices would be infected by this malware [15] and that new infections would still be surging.[16][17]

The malware's primary attack vector is repackaging legitimate Android applications (e.g. Facebook, Twitter, WhatsApp, Candy Crush, Google Now, Snapchat[18])[4][19][20] with adware included, the app which remains functional is then released to a third party app store;[21] once downloaded, the application generates revenue by serving ads (estimated to amount to $2 US per installation[20]), most users cannot get rid of the virus without getting a new device, as the only other way to get rid of the malware is to root affected devices and re-flash a custom ROM.[5][22][23]

In addition, Shedun-type malware has been detected pre-installed on 26 different types[24] of Chinese Android-based hardware such as Smartphones and Tablet computers.[25][26][27][28] [29][30][31][32][33][34][35][36][37][38][39]

Shedun-family malware is known for auto-rooting the Android OS [19][40] using well-known exploits like ExynosAbuse, Memexploit and Framaroot [41] (causing a potential privilege escalation[20][42][43])[44] and for serving trojanized adware and install themselves within the system partition of the operating system, so that not even a factory reset can remove the malware from infected devices.[45][46]

Shedun malware is known for targeting the Android Accessibility Service,[2][45][47][48][49][50][51] as well as for downloading and installing arbitrary applications[52] (usually adware) without permission,[3] it is classified as "aggressive adware" for installing potentially unwanted program [53][54][55] applications and serving ads.[56]

As of April 2016, Shedun malware is, by most security researchers, considered to be next to impossible to remove entirely.[57][58][59][60][61][62]

Avira Security researcher Pavel Ponomariov, specialized in Android malware detection tools, mobile threats detection and mobile malware detection automation research,[63] has published an in-depth analysis of the computer virus.[12]

See also[edit]


  1. ^ by @HackTheW0r1d (5 November 2015). "Shuanet, ShiftyBug and Shedun malware could auto-root your Android – HackBails". Retrieved 2 October 2016.
  2. ^ a b "Android Adware Abuses Accessibility Service to Install Apps". Retrieved 20 April 2016.
  3. ^ a b c Manish Singh. "New Android Adware Can Download, Install Apps Without Permission: Report". NDTV
  4. ^ a b "Three new malware strains infect 20k apps, impossible to wipe, only affect Android". AppleInsider Forums.
  5. ^ a b "Hackers reveal Android trojan malware that is IMPOSSIBLE to remove". Mail Online. 5 November 2015.
  6. ^ Eran, Daniel (5 November 2015). "Three new malware strains infect 20k apps, impossible to wipe, only affect Android". Retrieved 2 October 2016.
  7. ^ "Android Malware On The Loose: Shuanet, ShiftyBug And Shedun Signatures Found On 20,000 Apps Outside Google Play Store". Droid Report.
  8. ^ "Shedun Trojan goes solo". Darkmatters.
  9. ^ "Popular Mobile Apps Repackaged with Trojans". Lavasoft. 4 November 2015. Retrieved 2 October 2016.
  10. ^ "Another month, another new rooting malware family for Android". Retrieved 9 October 2016.
  11. ^ "DIY Attribution, Classification, and In-depth Analysis of Mobile Malware". Check Point Blog. 11 July 2016. Retrieved 9 October 2016.
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  13. ^ "Neue Welle von Android-Malware lässt sich kaum mehr entfernen". Retrieved 20 April 2016.
  14. ^ PMK Presse, Messe & Kongresse Verlags GmbH. "Gemeinsamkeiten: Shuanet, Shedun & ShiftyBug". Retrieved 20 April 2016.
  15. ^ Dan Goodin - Jul 7, 2016 5:50 pm UTC (7 July 2016). "10 million Android phones infected by all-powerful auto-rooting apps". Ars Technica. Retrieved 2 October 2016.
  16. ^ "Android Trojanized Adware 'Shedun' Infections Surge". 8 July 2016. Retrieved 2 October 2016.
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  18. ^ "Android-Malware: Adware war gestern. Android-Trojaner auf dem Vormarsch". botfrei Blog.
  19. ^ a b "New type of auto-rooting Android adware is nearly impossible to remove". Ars Technica.
  20. ^ a b c Michael Mimoso. "Shuanet Adware Roots Android Devices - Threatpost - The first stop for security news". Threatpost - The first stop for security news.
  21. ^ "Adware Shedun nistet sich gegen den Willen der Nutzer in Android ein".
  22. ^ "Android Trojan Software Morphs Into Real Apps, Nearly Impossible To Remove From Device's System: Report". Yibada.
  23. ^ "Android-Malware: Neue Schadsoftware rootet Geräte und ist kaum zu entfernen -".
  24. ^ Swati Khandelwal (3 September 2015). "26 Android Phone Models Shipped with Pre-Installed Spyware". The Hacker News.
  25. ^ "G Data : Mobile Malware Report" (PDF). Retrieved 20 April 2016.
  26. ^ Catalin Cimpanu (4 September 2015). "24 Chinese Android Smartphone Models Come with Pre-Installed Malware". softpedia.
  27. ^ David Gilbert. "Amazon Selling $40 Android Tablets That Come With Pre-Installed Malware". International Business Times.
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  30. ^ Diane Samson. "Malware Found Pre-Installed on Xiaomi, Huawei, Lenovo Phones".
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  32. ^ Jeremy Kirk (5 March 2014). "Pre-installed malware found on new Android phones". Computerworld.
  33. ^ "G Data : Mobile Malware Report" (PDF). Retrieved 20 April 2016.
  34. ^ Waqas. "Amazon Store, a safe haven for Android Tablets with pre-installed malware". HackRead.
  35. ^ "Pre-Installed Android Malware Raises Security Risks in Supply Chain".
  36. ^ "Some Android Phones Come With Malware Pre-Installed: Report". The Huffington Post.
  37. ^ "Brand New Android Smartphones Coming with Spyware and Malware". WCCFtech.
  38. ^ "Chinese Android smartphone comes with malware pre-installed". Graham Cluley.
  39. ^ Martin Brinkmann (8 September 2015). "Beware, your Android phone might come with preloaded spyware". gHacks Technology News.
  40. ^ "Trojan adware on Android can give itself root access". The Tech Report.
  41. ^ "Shedun, Shuanet und Shiftybug: Android-Smartphone vor Malware schützen".
  42. ^ "Android-Nutzer: Achtung vor Trojaner-Adware Shedun - Check & Secure -". - Check & Secure -.
  43. ^ "New Android adware tries to root your phone so you can't remove it". ExtremeTech.
  44. ^ "More than 20,000 apps auto-root Android devices". SC Magazine UK.
  45. ^ a b "Android's accessibility service grants god-mode p0wn power".
  46. ^ "Trojanized adware family abuses accessibility service to install whatever apps it wants | Lookout Blog". 19 November 2015. Retrieved 10 April 2016.
  47. ^ "Shedun trojan adware is hitting the Android Accessibility Service". Retrieved 20 April 2016.
  48. ^ "Shedun adware can install any malicious mobile appSecurity Affairs". Security Affairs.
  49. ^ Shedun gaining accessibility service privileges. 18 November 2015 – via YouTube.
  50. ^ Dennis Schirrmacher (20 November 2015). "Android-Malware: Werbeterror wie von Geisterhand". Security.
  51. ^ "Der Adware – Trojaner Shedun". 6 December 2015.
  52. ^ Swati Khandelwal (20 November 2015). "This Malware Can Secretly Auto-Install any Android App to Your Phone". The Hacker News.
  53. ^ "Trojaner-Adware installiert selbstständig ungewollte Android-Apps". Retrieved 20 April 2016.
  54. ^ "Shedun: Neue Android-Adware installiert Apps ohne deine Einwilligung". Androidmag.
  55. ^ John Woll. "Installation auch nach Ablehnung: Neue dreiste Android-Adware".
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  57. ^ "Gefährliche Android-Schadsoftware: Oft hilft nur neues Gerät". Retrieved 20 April 2016.
  58. ^ "Shedun trojan adware is hitting the Android Accessibility Service". The Inquirer. 20 November 2015. Retrieved 10 April 2016.
  59. ^ "Lookout discovers new trojanized adware; 20K popular apps caught in the crossfire | Lookout Blog". 4 November 2015. Retrieved 10 April 2016.
  60. ^ "Shuanet, ShiftyBug and Shedun malware could auto-root your Android". Retrieved 10 April 2016.
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  63. ^ "Pavel Ponomariov - Avira Blog". Avira Blog.