RTKT_MDIEXP.QYUA
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Trojan may be dropped by other malware.
TECHNICAL DETAILS
11,648 bytes
SYS
Yes
26 Jan 2012
Arrival Details
This Trojan may be dropped by the following malware:
- TROJ_DLOAD.QYUA
Autostart Technique
This Trojan registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Com32
ImagePath = "%System%\drivers\com32.sys"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Com32
Type = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Com32
Start = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Com32
ErrorControl = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\Com32
DisplayName = "Com32"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\FileDisk
ImagePath = "%System%\FileDisk.sys"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\FileDisk
Type = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\FileDisk
Start = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\FileDisk
ErrorControl = "1"
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\FileDisk
DisplayName = "FileDisk"
Rootkit Capabilities
This Trojan is used by other malware for its rootkit functionalities.
SOLUTION
9.200
currently processing
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
Remove the malware/grayware file that dropped/downloaded RTKT_MDIEXP.QYUA
- TROJ_DLOAD.QYUA
Step 3
Restart in Safe Mode
Step 4
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\CurrentControlSet\Services
- Com32
- Com32
- In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
- FileDisk
- FileDisk
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as RTKT_MDIEXP.QYUA. 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.
Did this description help? Tell us how we did.