Backdoor.Win32.Fynloski_2d6a960625

by malwarelabrobot on October 13th, 2013 in Malware Descriptions.

Backdoor.Win32.Fynloski!IK (Emsisoft), Backdoor.Win32.Fynloski.FD, Trojan.Win32.Iconomon.FD, Trojan.Win32.Sasfis.FD, VirTool.Win32.DelfInject.FD, TrojanDownloaderAndromeda.YR, GenericDownloader.YR, BackdoorFynloski.YR, GenericInjector.YR (Lavasoft MAS)
Behaviour: Trojan-Downloader, Trojan, Backdoor, VirTool


The description has been automatically generated by Lavasoft Malware Analysis System and it may contain incomplete or inaccurate information.

Summary
Technical Details
Removal Recommendations

MD5: 2d6a9606253c5ef1fe53b5e7865925bf
SHA1: 91f589bf30320ee23c535864a6c606815cbc8d41
SHA256: 423fc0af5abe8f93cfe20b6e26f4697ae21695425b26171facf84cfd4f6b0763
SSDeep: 12288:lJToT5lnjYeJGLf4yD5a/9aNgmgWEPPp0QoVCO9GhI2b5EFLrKI8TgNR:lJsllnjIQ/ANOPP2YUZ9YV0r
Size: 716288 bytes
File type: EXE
Platform: WIN32
Entropy: Not Packed
PEID: MicrosoftVisualC, NETexecutable, UPolyXv05_v6
Company: ADK Apps
Created at: 2013-05-15 01:32:43


Summary:

Backdoor. Malware that enables a remote control of victim's machine.

Payload

No specific payload has been found.

Process activity

The Backdoor creates the following process(es):

The Backdoor injects its code into the following process(es):

2d6a9606253c5ef1fe53b5e7865925bf.exe:1784
jusched.exe:952

File activity

The process 2d6a9606253c5ef1fe53b5e7865925bf.exe:1784 makes changes in a file system.
The Backdoor creates and/or writes to the following file(s):

%Documents and Settings%\%current user%\Local Settings\Temp\AppLaunch\App.ine (7547 bytes)
%Documents and Settings%\%current user%\Application Data\tmp39.exe (4545 bytes)
%Documents and Settings%\%current user%\Application Data\tmp86.exe (4545 bytes)
%Documents and Settings%\%current user%\Local Settings\Temp\Tmp420 (18 bytes)

Registry activity

The process 2d6a9606253c5ef1fe53b5e7865925bf.exe:1784 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "A4 7B 68 83 12 AC 82 DC 58 80 50 D9 BE 8A EA C3"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"Cache" = "%Documents and Settings%\%current user%\Local Settings\Temporary Internet Files"

To automatically run itself each time Windows is booted, the Backdoor adds the following link to its file to the system registry autorun key:

[HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
"UpdateTool" = "c:\2d6a9606253c5ef1fe53b5e7865925bf.exe"

The process jusched.exe:952 makes changes in a system registry.
The Backdoor creates and/or sets the following values in system registry:

[HKLM\SOFTWARE\Microsoft\Cryptography\RNG]
"Seed" = "19 66 7F 42 80 08 A4 E0 35 5A B2 74 E2 1F B5 FB"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd73-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{5c14c4f6-74da-11e2-81b0-000c29ec7fc5}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd72-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{c155cd75-744b-11e2-8294-806d6172696f}]
"BaseClass" = "Drive"

[HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders]
"AppData" = "%Documents and Settings%\%current user%\Application Data"

Network activity (URLs)

No activity has been detected.

Rootkit activity

No anomalies have been detected.

Propagation


Remove it with Ad-Aware

  1. Click (here) to download and install Ad-Aware Free Antivirus.
  2. Update the definition files.
  3. Run a full scan of your computer.


Manual removal*

  1. Terminate the original Backdoor's process (How to End a Process With the Task Manager).
  2. Delete the original Backdoor file.
  3. Delete or disinfect the following files created/modified by the Backdoor:

    %Documents and Settings%\%current user%\Local Settings\Temp\AppLaunch\App.ine (7547 bytes)
    %Documents and Settings%\%current user%\Application Data\tmp39.exe (4545 bytes)
    %Documents and Settings%\%current user%\Application Data\tmp86.exe (4545 bytes)
    %Documents and Settings%\%current user%\Local Settings\Temp\Tmp420 (18 bytes)

  4. Delete the following value(s) in the autorun key (How to Work with System Registry):

    [HKCU\Software\Microsoft\Windows\CurrentVersion\Run]
    "UpdateTool" = "c:\2d6a9606253c5ef1fe53b5e7865925bf.exe"

  5. Reboot the computer.

*Manual removal may cause unexpected system behaviour and should be performed at your own risk.