BKDR_POISON.AEF
Packed.Cisabim!gen1 (Symantec); Backdoor.Win32.Poison.basa (Kaspersky); Trojan.Win32.Generic.pak!cobra (Sunbelt); Trojan horse BackDoor.Generic12.NOA (AVG)
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
172,032 bytes
EXE
No
07 Jun 2013
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%\Cerberus\server.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It creates the following folders:
- %System%\Cerberus
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Other System Modifications
This backdoor deletes the following files:
- %System%\Cerberus\server.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It adds the following registry keys:
HKEY_CURRENT_USER\SOFTWARE\Cerberus
It adds the following registry entries:
HKEY_CURRENT_USER\Software\Cerberus
FileNameAtual = "{malware path and file name}"
HKEY_CURRENT_USER\Software\Cerberus
FirstExecution = "06/05/2013"
HKEY_CURRENT_USER\Software\Cerberus
ByPersist = "%System%\Cerberus\server.exe"
HKEY_CURRENT_USER\Software\Cerberus
FileName = "Dlzcs1JtFiFdifAOxfQDRfRiNiFex2oYq9cmudzeV4j4npFyweHo"
It deletes the following registry keys:
HKEY_CURRENT_USER\Software\Cerberus
This report is generated via an automated analysis system.
SOLUTION
9.300
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
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_CURRENT_USER\SOFTWARE
- Cerberus
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_CURRENT_USER\Software\Cerberus
- FileNameAtual = "{malware path and file name}"
- In HKEY_CURRENT_USER\Software\Cerberus
- FirstExecution = "06/05/2013"
- In HKEY_CURRENT_USER\Software\Cerberus
- ByPersist = "%System%\Cerberus\server.exe"
- In HKEY_CURRENT_USER\Software\Cerberus
- FileName = "Dlzcs1JtFiFdifAOxfQDRfRiNiFex2oYq9cmudzeV4j4npFyweHo"
Step 4
Search and delete this folder
- %System%\Cerberus
Step 5
Scan your computer with your Trend Micro product to delete files detected as BKDR_POISON.AEF. 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.
Step 6
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %System%\Cerberus\server.exe
Step 7
Restore these deleted registry keys/values from backup
*Note: Only Microsoft-related keys/values will be restored. If the malware/grayware also deleted registry keys/values related to programs that are not from Microsoft, please reinstall those programs on your computer.
- In HKEY_CURRENT_USER\Software
- Cerberus
Did this description help? Tell us how we did.