BKDR_AGENTT.AE
Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows 7
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
59,904 bytes
EXE
Yes
25 May 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 Root%\ProgramData\svchost.exe (for Windows Vista/Windows 7 only)
- %System Root%\Users\All Users\svchost.exe (for Windows Vista/Windows 7 only)
- %System Root%\Documents and Settings\All Users\svchost.exe (for versions other than Windows Vista/Windows 7)
(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)
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
SunJavaUpdateSched = "%System Root%\Documents and Settings\All Users\svchost.exe" (for versions other than Windows Vista/Windows 7)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
SunJavaUpdateSched = "%System Root%\ProgramData\svchost.exe" (for Windows Vista/Windows 7 only)
Other System Modifications
This backdoor creates the following registry entry(ies) to bypass Windows Firewall:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\FirewallRules
TCP Query User{GUID 1}{malware path and file name} = "v2.10|Action=Allow|Active=TRUE|Dir=In|Protocol=6|Profile=Public|App={malware path and file name}|Name=Firmer Presidents|Desc=Firmer Presidents|Defer=User|" (for Windows Vista/Windows 7 only)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\SharedAccess\Parameters\
FirewallPolicy\FirewallRules
UDP Query User{GUID2}{malware path and file name} = "v2.10|Action=Allow|Active=TRUE|Dir=In|Protocol=17|Profile=Public|App={malware path and file name}|Name=Firmer Presidents|Desc=Firmer Presidents|Defer=User|" (for Windows Vista/Windows 7 only)
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{malware path and file name} = "{malware path and file name}:*:Enabled:{malware file name}" (for versions other than Windows Vista/Windows 7)
SOLUTION
9.200
9.140.04
26 May 2012
9.141.00
26 May 2012
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
Terminate a malware/grayware process
*Note: If the detected process is not displayed in theWindows Task Manager, continue doing the next steps.
- %System Root%\ProgramData\svchost.exe (for Windows Vista/Windows 7 only)
- %System Root%\Users\All Users\svchost.exe (for Windows Vista/Windows 7 only)
- %System Root%\Documents and Settings\All Users\svchost.exe (for versions other than Windows Vista/Windows 7)
Step 3
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
- SunJavaUpdateSched = "%System Root%\Documents and Settings\All Users\svchost.exe" (for versions other than Windows Vista/Windows 7)
- SunJavaUpdateSched = "%System Root%\Documents and Settings\All Users\svchost.exe" (for versions other than Windows Vista/Windows 7)
- In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
- SunJavaUpdateSched = "%System Root%\ProgramData\svchost.exe" (for Windows Vista/Windows 7 only)
- SunJavaUpdateSched = "%System Root%\ProgramData\svchost.exe" (for Windows Vista/Windows 7 only)
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SharedAccess\Parameters\FirewallPolicy\FirewallRules
- TCP Query User{GUID 1}{malware path and file name} = "v2.10|Action=Allow|Active=TRUE|Dir=In|Protocol=6|Profile=Public|App={malware path and file name}|Name=Firmer Presidents|Desc=Firmer Presidents|Defer=User|"
(for Windows Vista/Windows 7 only)
- TCP Query User{GUID 1}{malware path and file name} = "v2.10|Action=Allow|Active=TRUE|Dir=In|Protocol=6|Profile=Public|App={malware path and file name}|Name=Firmer Presidents|Desc=Firmer Presidents|Defer=User|"
(for Windows Vista/Windows 7 only)
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\SharedAccess\Parameters\FirewallPolicy\FirewallRules
- UDP Query User{GUID2}{malware path and file name} = "v2.10|Action=Allow|Active=TRUE|Dir=In|Protocol=17|Profile=Public|App={malware path and file name}|Name=Firmer Presidents|Desc=Firmer Presidents|Defer=User|"
(for Windows Vista/Windows 7 only)
- UDP Query User{GUID2}{malware path and file name} = "v2.10|Action=Allow|Active=TRUE|Dir=In|Protocol=17|Profile=Public|App={malware path and file name}|Name=Firmer Presidents|Desc=Firmer Presidents|Defer=User|"
(for Windows Vista/Windows 7 only)
Step 4
Scan your computer with your Trend Micro product to delete files detected as BKDR_AGENTT.AE. 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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