TROJ_RIMECUD.AZ
Windows 2000, XP, Server 2003
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan may be dropped by other malware. It may be unknowingly downloaded by a user while visiting malicious websites. However, as of this writing, the said sites are inaccessible.
It connects to certain websites to send and receive information.
TECHNICAL DETAILS
139,264 bytes
PE
Yes
30 Sep 2010
Compromises system security
Arrival Details
This Trojan may be dropped by other malware.
It may be unknowingly downloaded by a user while visiting malicious websites.
However, as of this writing, the said sites are inaccessible.
Installation
This Trojan drops the following copies of itself into the affected system:
- %Application Data%\rmhzb.exe
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)
It injects itself into the following processes as part of its memory residency routine:
- EXPLORER.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 NT\CurrentVersion\Winlogon
Taskman = %Application Data%\rmhzb.exe
Other Details
This Trojan connects to the following website to send and receive information:
- {BLOCKED}a.ananikolic.su
- {BLOCKED}r.pickeklosarske.ru
- {BLOCKED}e.losmibracala.org
SOLUTION
8.900
7.505.80
30 Sep 2010
9/30/2010 12:00:00 AM
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 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.
RESTOREStep 4
Scan your computer with your Trend Micro product to delete files detected as TROJ_RIMECUD.AZ. 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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