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Added to the Dr.Web virus database: 2016-12-01

Virus description added:


  • e7130afd745e17ca27c80c2dc77c3132be854173

A component of Android.Loki.16.origin installed by Android.Loki.28 to the system catalog /system/bin/ as a file named xalco. Android.Loki.26 is designed to covertly download, install, and launch applications on the command of cybercriminals.

Android.Loki.26 maintains the connection to the server periodically sending heartbeat messages. The server replies with commands instructing to download and launch applications. All messages are forwarded in the JSON format. For example:

"version": 1,


  • “phoneid” – cell phone identifier;
  • "gaid": – authenticator Google Ads;
  • “android” – OS version;
  • “mac” – MAC address;
  • “imei” – IMEI identifier;
  • "brand” – name of the device manufacturer;
  • "model” – name of a device;
  • “sdk” – SDK version of the operation system;
  • “linux_v” – Linux kernel version;
  • “version” – a constant.

An example of a task sent by the server as a reply to the Trojan’s request:

"data": {


  • “status”: – number (0 = success);
  • “msg”: – not used;
  • “url”: – link for application download;
  • “pkg”: – application package name;
  • “activity”: – launch an application after its installation;
  • “size”: – file size;
  • “md5”: – the MD5 value of downloaded file;
  • “version”: – not used.

Downloaded applications are then installed and run in background mode by means of the utilities pm and am. Android.Loki.26 sends a report with new parameters added to the initial request. pkg (package name) and result (output of the utility pm).

News about the Trojan

Curing recommendations


  1. If the mobile device is operating normally, download and install Dr.Web for Android Light. Run a full system scan and follow recommendations to neutralize the detected threats.
  2. If the mobile device has been locked by Android.Locker ransomware (the message on the screen tells you that you have broken some law or demands a set ransom amount; or you will see some other announcement that prevents you from using the handheld normally), do the following:
    • Load your smartphone or tablet in the safe mode (depending on the operating system version and specifications of the particular mobile device involved, this procedure can be performed in various ways; seek clarification from the user guide that was shipped with the device, or contact its manufacturer);
    • Once you have activated safe mode, install the Dr.Web для Android Light onto the infected handheld and run a full scan of the system; follow the steps recommended for neutralizing the threats that have been detected;
    • Switch off your device and turn it on as normal.

Find out more about Dr.Web for Android

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