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02 May 2016
29 August 2016
Infection Length:
Systems Affected:
Ransom.AlphaLocker is a Trojan horse that encrypts files on the compromised computer and asks the user to pay in order to decrypt them.

Note: Definitions prior to August, 2016 may detect this threat as Trojan.Ransomcrypt.AM

Antivirus Protection Dates

  • Initial Rapid Release version 20 May 2016 revision 034
  • Latest Rapid Release version 22 September 2016 revision 024
  • Initial Daily Certified version 20 May 2016 revision 049
  • Latest Daily Certified version 22 September 2016 revision 025
  • Initial Weekly Certified release date 04 May 2016
Click here for a more detailed description of Rapid Release and Daily Certified virus definitions.
When the Trojan is executed, it creates the following files:
  • %SystemDrive%\Documents and Settings\[USER NAME]\Desktop\Read Me (How Decrypt) !!!!.txt
  • %SystemDrive%\Documents and Settings\[USER NAME]\Application Data\Windows\svchost.exe
  • %SystemDrive%\Documents and Settings\[USER NAME]\newstyle.jpg

The Trojan creates the following registry entries:
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"Microsoft" = "%SystemDrive%\Documents and Settings\[USER NAME]\Application Data\Windows\svchost.exe"
  • HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\"DisableTaskMgr" = dword:00000001

The Trojan may encrypt files on the compromised computer with the following extensions:
  • .txt
  • .wb2
  • .psd
  • .p7c
  • .p7b
  • .p12
  • .pfx
  • .pem
  • .crt
  • .cer
  • .der
  • .pl
  • .lua
  • .asp
  • .php
  • .incpas
  • .asm
  • .hpp
  • .h
  • .cpp
  • .c
  • .drf
  • .blend
  • .apj
  • .3ds
  • .dwg
  • .sda
  • .ps
  • .pat
  • .cmd
  • .bat
  • .class
  • .jar
  • .java
  • .fxg
  • .fhd
  • .fh
  • .svg
  • .bmp
  • .vbs
  • .png
  • .gif
  • .dxb
  • .drw
  • .design
  • .ddrw
  • .ddoc
  • .dcs
  • .csl
  • .csh
  • .cpi
  • .cgm
  • .cdx
  • .cdrw
  • .cdr6
  • .cdr5
  • .cdr4
  • .cdr3
  • .cdr
  • .awg
  • .ait
  • .ai
  • .agd1
  • .ycbcra
  • .x3f
  • .stx
  • .st8
  • .st7
  • .st6
  • .st5
  • .st4
  • .srw
  • .srf
  • .sr2
  • .sd1
  • .sd0
  • .rwz
  • .rwl
  • .rw2
  • .raw
  • .raf
  • .ra2
  • .ptx
  • .pef
  • .pcd
  • .orf
  • .nwb
  • .nrw
  • .nop
  • .nef
  • .ndd
  • .mrw
  • .mos
  • .mfw
  • .mef
  • .mdc
  • .kdc
  • .kc2
  • .iiq
  • .gry
  • .grey
  • .gray
  • .fpx
  • .fff
  • .exf
  • .erf
  • .dng
  • .dcr
  • .dc2
  • .crw
  • .craw
  • .cr2
  • .cmt
  • .cib
  • .ce2
  • .ce1
  • .arw
  • .3pr
  • .3fr
  • .mpg
  • .jpeg
  • .jpg
  • .mdb
  • .sqlitedb
  • .sqlite3
  • .sqlite
  • .sql
  • .sdf
  • .sav
  • .sas7bdat
  • .s3db
  • .rdb
  • .psafe3
  • .nyf
  • .nx2
  • .nx1
  • .nsh
  • .nsg
  • .nsf
  • .nsd
  • .ns4
  • .ns3
  • .ns2
  • .myd
  • .kpdx
  • .kdbx
  • .idx
  • .ibz
  • .ibd
  • .fdb
  • .erbsql
  • .db3
  • .dbf
  • .db-journal
  • .db
  • .cls
  • .bdb
  • .al
  • .adb
  • .backupdb
  • .bik
  • .backup
  • .bak
  • .bkp
  • .moneywell
  • .mmw
  • .ibank
  • .hbk
  • .ffd
  • .dgc
  • .ddd
  • .dac
  • .cfp
  • .cdf
  • .bpw
  • .bgt
  • .acr
  • .ac2
  • .ab4
  • .djvu
  • .pdf
  • .sxm
  • .odf
  • .std
  • .sxd
  • .otg
  • .sti
  • .sxi
  • .otp
  • .odg
  • .odp
  • .stc
  • .sxc
  • .ots
  • .ods
  • .sxg
  • .stw
  • .sxw
  • .odm
  • .oth
  • .ott
  • .odb
  • .rtf
  • .accdr
  • .accdt
  • .accde
  • .accdb
  • .sldm
  • .sldx
  • .ppsm
  • .ppsx
  • .ppam
  • .potm
  • .potx
  • .pptm
  • .pps
  • .pot
  • .xlw
  • .xll
  • .xlam
  • .xla
  • .xlsb
  • .xltm
  • .xltx
  • .xlsm
  • .xlm
  • .xlt
  • .xml
  • .dotm
  • .dotx
  • .docm
  • .dot
  • .txt
  • .py
  • .css
  • .js
  • .doc
  • .docx
  • .xls
  • .xlsx
  • .ppt
  • .pptx
  • .odt
  • .csv
  • .sln
  • .aspx
  • .html
  • .cs
  • .vb

The Trojan may contact the following domain to generate and save encryption keys:

The Trojan changes the wallpaper to the following image:

The Trojan creates a .txt file in to folders it encrypts with the following text:
We'd like to apologize for the inconveniences, however, your computer has been locked. In order to unlock it, you have to complete the following steps:

1. Buy iTunes Gift Cards for a total amount of $400.00
2. Send the gift codes to the indicated e-mail address [REMOVED]
3. Receive a code and a file that will unlock your computer.

Please note:
- The nominal amount of the particular gift card doesn't matter, yet the total amount have to be as listed above.
- You can buy the iTunes Gift Cards online or in any shop. The codes must be correct, otherwise, you won't receive anything.
- After receiving the code and the security file, your computer will be unlocked and will never be locked again.

Sorry for the inconveniences caused."


Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":

  • Use a firewall to block all incoming connections from the Internet to services that should not be publicly available. By default, you should deny all incoming connections and only allow services you explicitly want to offer to the outside world.
  • Enforce a password policy. Complex passwords make it difficult to crack password files on compromised computers. This helps to prevent or limit damage when a computer is compromised.
  • Ensure that programs and users of the computer use the lowest level of privileges necessary to complete a task. When prompted for a root or UAC password, ensure that the program asking for administration-level access is a legitimate application.
  • Disable AutoPlay to prevent the automatic launching of executable files on network and removable drives, and disconnect the drives when not required. If write access is not required, enable read-only mode if the option is available.
  • Turn off file sharing if not needed. If file sharing is required, use ACLs and password protection to limit access. Disable anonymous access to shared folders. Grant access only to user accounts with strong passwords to folders that must be shared.
  • Turn off and remove unnecessary services. By default, many operating systems install auxiliary services that are not critical. These services are avenues of attack. If they are removed, threats have less avenues of attack.
  • If a threat exploits one or more network services, disable, or block access to, those services until a patch is applied.
  • Always keep your patch levels up-to-date, especially on computers that host public services and are accessible through the firewall, such as HTTP, FTP, mail, and DNS services.
  • Configure your email server to block or remove email that contains file attachments that are commonly used to spread threats, such as .vbs, .bat, .exe, .pif and .scr files.
  • Isolate compromised computers quickly to prevent threats from spreading further. Perform a forensic analysis and restore the computers using trusted media.
  • Train employees not to open attachments unless they are expecting them. Also, do not execute software that is downloaded from the Internet unless it has been scanned for viruses. Simply visiting a compromised Web site can cause infection if certain browser vulnerabilities are not patched.
  • If Bluetooth is not required for mobile devices, it should be turned off. If you require its use, ensure that the device's visibility is set to "Hidden" so that it cannot be scanned by other Bluetooth devices. If device pairing must be used, ensure that all devices are set to "Unauthorized", requiring authorization for each connection request. Do not accept applications that are unsigned or sent from unknown sources.
  • For further information on the terms used in this document, please refer to the Security Response glossary.
You may have arrived at this page either because you have been alerted by your Symantec product about this risk, or you are concerned that your computer has been affected by this risk.

Before proceeding further we recommend that you run a full system scan . If that does not resolve the problem you can try one of the options available below.

If you are a Norton product user, we recommend you try the following resources to remove this risk.

Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .

How to reduce the risk of infection
The following resources provide further information and best practices to help reduce the risk of infection.

If you are a Symantec business product user, we recommend you try the following resources to remove this risk.

Identifying and submitting suspect files
Submitting suspicious files to Symantec allows us to ensure that our protection capabilities keep up with the ever-changing threat landscape. Submitted files are analyzed by Symantec Security Response and, where necessary, updated definitions are immediately distributed through LiveUpdate™ to all Symantec end points. This ensures that other computers nearby are protected from attack. The following resources may help in identifying suspicious files for submission to Symantec.

Removal Tool

If you have an infected Windows system file, you may need to replace it using the Windows installation CD .

How to reduce the risk of infection
The following resource provides further information and best practices to help reduce the risk of infection.
Protecting your business network

The following instructions pertain to all current Symantec antivirus products.

1. Performing a full system scan
How to run a full system scan using your Symantec product

2. Restoring settings in the registry
Many risks make modifications to the registry, which could impact the functionality or performance of the compromised computer. While many of these modifications can be restored through various Windows components, it may be necessary to edit the registry. See in the Technical Details of this writeup for information about which registry keys were created or modified. Delete registry subkeys and entries created by the risk and return all modified registry entries to their previous values.