Technical Information
To ensure autorun and distribution:
Modifies the following registry keys:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Run] '{B57FA760-7936-4268-BE6C-8B605D20CF5D}' = '"%APPDATA%\Lyak\evag.exe"'
Malicious functions:
To bypass firewall, removes or modifies the following registry keys:
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'DoNotAllowExceptions' = '00000000'
- [<HKLM>\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile] 'EnableFirewall' = '00000000'
To complicate detection of its presence in the operating system,
blocks execution of the following system utilities:
- Windows Task Manager (Taskmgr)
blocks the following features:
- User Account Control (UAC)
Creates and executes the following:
- %APPDATA%\Lyak\evag.exe
Executes the following:
- <SYSTEM32>\netsh.exe firewall set opmode disable
Injects code into
the following system processes:
- <SYSTEM32>\ctfmon.exe
- %WINDIR%\Explorer.EXE
the following user processes:
- dekaron.exe
- ClamWin.exe
- drweb.exe
- dnf.exe
- cabalmain.exe
- bdsubmit.exe
- chrome.exe
- ccapp.exe
- egni.exe
- ecmd.exe
- elementclient.exe
- ekrn.exe
- drweb386.exe
- Drweb32w.exe
- Drwebwcl.exe
- Drwebupw.exe
- bdss.exe
- ashAvSrv.exe
- ashAvast.exe
- AVGCC32.EXE
- avgcc.exe
- ageofconan.exe
- __cd75efb816b2cc__.exe
- ash.exe
- aion.exe
- AVPM.EXE
- AVPCC.EXE
- bdagent.exe
- AVSYNMGR.EXE
- AVP.COM
- AVGCTRL.EXE
- AVP32.EXE
- AVP.EXE
Searches for registry branches where third party applications store passwords:
- [<HKCU>\SOFTWARE\martin prikryl\winscp 2\sessions]
- [<HKLM>\SOFTWARE\martin prikryl\winscp 2\sessions]
- [<HKCU>\SOFTWARE\ftpware\coreftp\sites]
- [<HKCU>\SOFTWARE\Far2\Plugins\ftp\hosts]
- [<HKLM>\SOFTWARE\FlashFXP\3]
- [<HKCU>\SOFTWARE\Ghisler\Total Commander]
- [<HKCU>\SOFTWARE\Far\Plugins\ftp\hosts]
Modifies settings of Windows Internet Explorer:
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1609' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3] '1406' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4] '1609' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\4] '1406' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '1406' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0] '1609' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\2] '1609' = '00000000'
- [<HKCU>\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1] '1609' = '00000000'
Modifies file system :
Creates the following files:
- %APPDATA%\Ryoqu\qyoso.efa
- %HOMEPATH%\Local Settings\Temporary Internet Files\Content.IE5\69I9OPW5\ishiserj[1].bin
- %APPDATA%\Lyak\evag.exe
- %TEMP%\tmp6cb5613c.bat
Deletes itself.
Network activity:
Connects to:
- '21#.#11.108.213':80
TCP:
HTTP GET requests:
- 21#.#11.108.213/~ishigo/zs/ishiserj.bin
Miscellaneous:
Searches for the following windows:
- ClassName: 'Indicator' WindowName: ''
- ClassName: '' WindowName: 'Network event'
