Trojan.DownLoader29.51506

Technical Information

To ensure autorun and distribution

Modifies the following registry keys

[<HKCU>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Defender' = '-'
[<HKLM>\SOFTWARE\Microsoft\Windows\CurrentVersion\Run] 'Windows Defender' = '-'

Creates the following services

[<HKLM>\System\CurrentControlSet\Services\Workstations] 'Start' = '00000002'
[<HKLM>\System\CurrentControlSet\Services\Workstations] 'ImagePath' = '<SYSTEM32>\WerFaultSec.exe'

Malicious functions

To complicate detection of its presence in the operating system,

blocks the following features:

User Account Control (UAC)

Creates and executes the following

'' (downloaded from the Internet)

Modifies file system

Creates the following files

<SYSTEM32>\werfaultsec.exe
%TEMP%\_uninsep.bat
C:\documents and settings\localservice\local settings\<INETFILES>\content.ie5\9stcdn6y\2appverif[1].chm
%WINDIR%\temp\taskeng.exe
<SYSTEM32>\config\system\locals~1\temp\gulim.ttf

Deletes itself.

Network activity

Connects to

'10#.#.250.236':8090
'10#.#.250.236':80

TCP

HTTP GET requests

http://10#.#.250.236:8080/2appverif.chm

UDP

'10#.#.250.236':2016

Miscellaneous

Searches for the following windows

ClassName: '' WindowName: '한게임 7포커'
ClassName: 'BTan_Game' WindowName: '포커게임'
ClassName: 'BTan_Game' WindowName: '바둑이게임'
ClassName: 'POKER_CANVAS' WindowName: '피쉬게임'
ClassName: 'POKER_CANVAS' WindowName: '탱크게임'
ClassName: 'BADUKI' WindowName: 'BADUKI'
ClassName: 'CXG_WNDCLASS' WindowName: ''
ClassName: 'REALGAME_CANVAS' WindowName: '게임 클라이언트'
ClassName: 'POKER_CANVAS' WindowName: '게임 클라이언트'
ClassName: '' WindowName: '넷마블 훌라'
ClassName: '' WindowName: '넷마블 뉴포커'
ClassName: '' WindowName: '넷마블 하이로우'
ClassName: '' WindowName: '넷마블 로우바둑이'
ClassName: '' WindowName: '넷마블 7포커'
ClassName: '' WindowName: '피망 훌라'
ClassName: '' WindowName: '피망 뉴포커'
ClassName: '' WindowName: '피망 하이로우'
ClassName: '' WindowName: '피망 로우바둑이'
ClassName: '' WindowName: '피망 7포커'
ClassName: '' WindowName: '한게임 파티훌라'
ClassName: '' WindowName: '한게임 맞포커'
ClassName: '' WindowName: '한게임 라스베가스 포커'
ClassName: '' WindowName: '하이로우2'
ClassName: '' WindowName: '한게임 로우바둑이'
ClassName: 'BTan_Game' WindowName: '맞고게임'
ClassName: 'UnityWndClass' WindowName: '쓰리랑게임'

Creates and executes the following

'<SYSTEM32>\werfaultsec.exe' -i
'<SYSTEM32>\werfaultsec.exe'
'%WINDIR%\temp\taskeng.exe'
'<SYSTEM32>\cmd.exe' /c ""%TEMP%\_uninsep.bat" "' (with hidden window)

Executes the following

'<SYSTEM32>\cmd.exe' /c ""%TEMP%\_uninsep.bat" "

Curing recommendations

If the operating system (OS) can be loaded (either normally or in safe mode), download Dr.Web Security Space and run a full scan of your computer and removable media you use. More about Dr.Web Security Space.
If you cannot boot the OS, change the BIOS settings to boot your system from a CD or USB drive. Download the image of the emergency system repair disk Dr.Web® LiveDisk , mount it on a USB drive or burn it to a CD/DVD. After booting up with this media, run a full scan and cure all the detected threats.

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Use Dr.Web Anti-virus for macOS to run a full scan of your Mac.

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Download on App Store

After booting up, run a full scan of all disk partitions with Dr.Web Anti-virus for Linux.

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Download Dr.Web

Download by serial number

If the mobile device is operating normally, download and install Dr.Web for Android. Run a full system scan and follow recommendations to neutralize the detected threats.
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 for Android 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.

Technologies

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