TROJ_GENOME.APH
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: No
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.
It does not have any propagation routine.
It does not have any backdoor routine.
It does not have any downloading capability.
It does not have any information-stealing capability.
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%\ebms.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 drops the following non-malicious file:
- %System%\ax
(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 injects codes into the following process(es):
- svchost.exe
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\RunOnce
fum = "%System%\ebms.exe"
Propagation
This Trojan does not have any propagation routine.
Backdoor Routine
This Trojan does not have any backdoor routine.
Download Routine
This Trojan does not have any downloading capability.
Information Theft
This Trojan does not have any information-stealing capability.
Other Details
This Trojan checks for the presence of the following process(es):
- avp.exe
- pccguide.exe
- RavMon.exe
- fsguidll.exe
NOTES:
This malware checks if the found process is located on the following folder:
- For avp.exe:
- Kaspersky Internet Security 7.0
- Kaspersky Anti-Virus 7.0
- For pccguide.exe:
- Trend Micro\Internet Security 2007
- For RavMon.exe:
- Rising\Rav\
- For fsguidll.exe:
- F-Secure\FSGUI\
If the above processes are not found, this malware drops the following file:
- %System%\fgsm.sys - detected as RTKT_BUREY.T
If the above processes are found, it drops the following file:
- %User Temp%\ssmger.sys - detected as RTKT_BUREY.T
This malwarel replaces the file %System%\drivers\beep.sys with %User Temp%\ssmger.sys.
This malware does not exploit any vulnerability.
It deletes the initially executed copy of itself
SOLUTION
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 3
Restart in Safe Mode
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\RunOnce
- fum = "%System%\ebms.exe"
- fum = "%System%\ebms.exe"
Step 5
Search and delete this file
- %System%\ax
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_GENOME.APH. 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.
NOTES:
Restore this deleted file from backup:
- %System%\drivers\beep.sys
Note: 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 your computer.
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