TROJ_DROPPER.XZ
Adware:Win32/DuDuAccelerator, Adware:Win32/DuDuAccelerator (Microsoft); [0000a000.EXE\0000a000.EXE]:QLowZones-4 (McAfee); ARC:EmbeddedEXE, PAK:[data0000]:ASPack (Kaspersky); DuDuAccelerator (Sunbelt)
Windows 2000, Windows XP, Windows Server 2003
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted:
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.
TECHNICAL DETAILS
147,989 bytes
EXE
No
29 May 2012
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.
Other System Modifications
This Trojan adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\DuDu\
DddOEM
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\DuDu\
DddOEM
OEMID = "c74ea416-84d9-456c-8122-e7f81276fda9"
HKEY_LOCAL_MACHINE\SOFTWARE\DuDu\
DddOEM
OEMVENDOR = "hhxz"
HKEY_LOCAL_MACHINE\SOFTWARE\DuDu\
DddOEM
OEMRPS = "1"
HKEY_LOCAL_MACHINE\SOFTWARE\DuDu\
DddOEM
install_Task_Step = "1"
Dropping Routine
This Trojan drops the following files:
- %Windows%\Tasks\DDD_Install_Program.job
- %User Temp%\ddd1.tmp
(Note: %Windows% is the Windows folder, which is usually C:\Windows or C:\WINNT.. %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.)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://dddvc.{BLOCKED}u.com/ddd/oemlite.html?{random characters}
This report is generated via an automated analysis 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
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\SOFTWARE\DuDu
- DddOEM
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_LOCAL_MACHINE\SOFTWARE\DuDu\DddOEM
- OEMID = "c74ea416-84d9-456c-8122-e7f81276fda9"
- In HKEY_LOCAL_MACHINE\SOFTWARE\DuDu\DddOEM
- OEMVENDOR = "hhxz"
- In HKEY_LOCAL_MACHINE\SOFTWARE\DuDu\DddOEM
- OEMRPS = "1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\DuDu\DddOEM
- install_Task_Step = "1"
Step 4
Search and delete these files
- %Windows%\Tasks\DDD_Install_Program.job
- %User Temp%\ddd1.tmp
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_DROPPER.XZ. 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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