TROJ_RANBYUS.AW
TrojanSpy:Win32/Ranbyus.G (Microsoft)
Windows 2000, Windows XP (32-bit and 64 bit), Windows Server 2003, Windows Vista (32-bit and 64 bit), Windows 7 (32-bit and 64 bit)
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Installation
This Trojan drops the following copies of itself into the affected system:
- %System%\machineupdate32.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Explorer\Run
Windows Debugger 32 = "%System%\machineupper32.exe"
Other System Modifications
This Trojan adds the following registry keys:
HKEY_CURRENT_USER\Software\{unreadable characters}
HKEY_CURRENT_USER\Software\BIFIT
HKEY_CURRENT_USER\Software\{unreadable characters}\
Z
HKEY_CURRENT_USER\Software\{unreadable characters}\
Z\Recent File List
HKEY_CURRENT_USER\Software\{unreadable characters}\
Z\Settings
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Microsoft\
Windows NT\CurrentVersion\Winlogon
SysDebug32 = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
%System%\svchost.exe = "%System%\svchost.exe:*:Enabled:Windows Debugger 32"
It modifies the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Hardware Profiles\Current\Software\
Microsoft\Windows\CurrentVersion\
Internet Settings
ProxyEnable = "0"
(Note: The default value data of the said registry entry is 1.)
It deletes the following registry keys:
HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows NT\CurrentVersion\SystemRestore
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}mo.com/profit_new2/index.php
- http://{BLOCKED}o.com/ru_profit_new/index.php
NOTES:
It deletes the user's browser cookies.