BKDR_DYCLER.AD
Windows 2000, Windows XP, Windows Server 2003
Threat Type: Backdoor
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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.
It executes then deletes itself afterward. It may be injected into processes running in memory.
It connects to a website to send and receive information.
It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.
TECHNICAL DETAILS
TCP Port 443
208,896 bytes
EXE
Yes
30 Aug 2012
Connects to URLs/IPs
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 executes then deletes itself afterward.
It may be injected into processes running in memory.
Backdoor Routine
This backdoor connects to the following websites to send and receive information:
- {BLOCKED}upd.at/first.php?r{value}
- {BLOCKED}vise.cc/first.php?r{value}
- {BLOCKED}in.su/first.php?r{value}
It posts the following information to its command and control (C&C) server:
- Installed Applications
- Directory and File List
- Drive Informations
- Network Information
- Username
- Computername
- OS Version
- Hardware Information
- Running Processes
Dropping Routine
This backdoor drops the following files:
- %User Temp%\{random}.exe
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)
It executes the dropped file(s). As a result, malicious routines of the dropped files are exhibited on the affected system.
SOLUTION
9.200
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
Scan your computer with your Trend Micro product and note files detected as BKDR_DYCLER.AD
Step 3
Restart in Safe Mode
Step 4
Search and delete this file
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BKDR_DYCLER.AD. 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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