BKDR_AGENT.INZZ
RemoteAccess:Win32/GhostRadmin.dll, RemoteAccess:Win32/GhostRadmin (Microsoft); [00073df4.EXE\00073df4.EXE\0008d118.EXE]:RemAdm-RemoteAdmin., [00073df4.EXE\00073df4.EXE\00085e78.EX (McAfee); W32.SillyFDC (Symantec); PAK:ASPack, Backdoor.Win32.RA-based.bp (Kaspersky); Dropped:Backdoor.Generic.68224 (FSecure)
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This backdoor 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
610,304 bytes
EXE
Yes
20 Sep 2012
Arrival Details
This backdoor 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 backdoor drops the following copies of itself into the affected system:
- %System%\myselff.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
It creates the following folders:
- %System%\winuping
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
Autostart Technique
This backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
selfbin = "%System%\myselff.exe"
Other System Modifications
This backdoor adds the following registry keys:
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\iplist
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
Port = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
Timeout = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
EnableLogFile = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
LogFilePath = "%System Root%\logfile.txt"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
FilterIp = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
DisableTrayIcon = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
AutoAllow = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
AskUser = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
EnableEventLog = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
NTAuthEnabled = "{random values}"
HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\
v2.0\Server\Parameters
Parameter = "{random values}"
Dropping Routine
This backdoor drops the following files:
- %System%\instal_r.exe
- %System%\winuping\AdmDll.dll
- %System%\winuping\raddrv.dll
- %System%\winuping\settings.reg
- %System%\winuping\svchost.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)
This report is generated via an automated analysis system.
SOLUTION
9.200
Step 1
For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.
Step 2
Restart in Safe Mode
Step 3
Delete this registry key
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SYSTEM
- RAdmin
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin
- v2.0
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0
- Server
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server
- iplist
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server
- Parameters
Step 4
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- selfbin = "%System%\myselff.exe"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- Port = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- Timeout = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- EnableLogFile = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- LogFilePath = "%System Root%\logfile.txt"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- FilterIp = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- DisableTrayIcon = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- AutoAllow = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- AskUser = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- EnableEventLog = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- NTAuthEnabled = "{random values}"
- In HKEY_LOCAL_MACHINE\SYSTEM\RAdmin\v2.0\Server\Parameters
- Parameter = "{random values}"
Step 5
Search and delete these files
- %System%\instal_r.exe
- %System%\winuping\AdmDll.dll
- %System%\winuping\raddrv.dll
- %System%\winuping\settings.reg
- %System%\winuping\svchost.exe
Step 6
Search and delete this folder
- %System%\winuping
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_AGENT.INZZ. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.
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