TROJ_INJECTOR.NT
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.
It may be injected into processes running in memory.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
TECHNICAL DETAILS
22,232 bytes
EXE
Yes
09 Oct 2008
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:
- %User Profile%\9ktl6dajl0.exe
(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)
It may be injected into processes running in memory.
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
9ktl6dajl0 = "%User Profile%\9ktl6dajl0.exe"
Other System Modifications
This Trojan adds the following registry entries as part of its installation routine:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
9ktl6dajl0 = "{random values}"
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- {BLOCKED}.{BLOCKED}.236.116:443
- {BLOCKED}.{BLOCKED}.236.114:443
- {BLOCKED}.{BLOCKED}.236.115:443
- {BLOCKED}.{BLOCKED}.32.194:443
- {BLOCKED}.{BLOCKED}.32.195:443
- {BLOCKED}.{BLOCKED}.32.196:443
- abc.{BLOCKED}rt.in:443
- {BLOCKED}t.in:443
- mail.{BLOCKED}n.com:443
- {BLOCKED}n.com:443
- mx.{BLOCKED}n.com:443
- www.{BLOCKED}n.com:443
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
SOLUTION
9.200
5.592.01
10 Oct 2008
5.593.00
11 Oct 2008
Step 1
Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.
Step 2
Scan your computer with your Trend Micro product and note files detected as TROJ_INJECTOR.NT
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- 9ktl6dajl0 = "%User Profile%\9ktl6dajl0.exe"
- 9ktl6dajl0 = "%User Profile%\9ktl6dajl0.exe"
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
- 9ktl6dajl0 = "{random values}"
- 9ktl6dajl0 = "{random values}"
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_INJECTOR.NT. 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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