TROJ_SMALL.NCG
TrojanDownloader:Win32/Small.gen!Q (Microsoft); Generic Downloader.x!gkx (McAfee); Trojan.Gen.2 (Symantec); Trojan-Downloader.Win32.Small (Sunbelt); Trojan horse Downloader.Generic12.CKVO.dropper (AVG)
Windows 2000, Windows XP, Windows Server 2003
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 deletes itself after execution.
TECHNICAL DETAILS
76,288 bytes
EXE
No
09 Feb 2013
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 deletes the following files:
- %Program Files%\Adobe\.
- %Program Files%\Adobe\..
- %Program Files%\Adobe\qwegier.exe
- %Program Files%\Adobe\Reader 10.0
- %User Temp%\tmpDwnInfo.txt
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).. %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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Dropping Routine
This Trojan drops the following files:
- %Program Files%\Adobe\ApplyDisk.sys
- %Program Files%\Adobe\AgentCall.exe
- %Program Files%\Adobe\qwegier.exe
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)
Other Details
This Trojan connects to the following possibly malicious URL:
- http://{BLOCKED}or.com/{random path}
It deletes itself after execution.
This report is generated via an automated analysis system.
SOLUTION
9.300
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
Search and delete these components
- %Program Files%\Adobe\ApplyDisk.sys
- %Program Files%\Adobe\AgentCall.exe
- %Program Files%\Adobe\qwegier.exe
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_SMALL.NCG. 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.
Step 4
Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.
- %Program Files%\Adobe\.
- %Program Files%\Adobe\..
- %Program Files%\Adobe\qwegier.exe
- %Program Files%\Adobe\Reader 10.0
- %User Temp%\tmpDwnInfo.txt
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