TROJ_ISNEV.J
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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 executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
27,136 bytes
EXE
Yes
29 Nov 2012
Connects to URLs/IPs, Downloads files
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 file(s)/component(s):
- %System%\systemInfomations.ini - contains the download information
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
Download Routine
This Trojan downloads an updated copy of itself from the following website(s):
- http://{BLOCKED}z.{BLOCKED}b.com/abcd.txt
It saves the files it downloads using the following names:
- %System%\down.txt
- %User Temp%\down.txt
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %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.)
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Other Details
However, as of this writing, the said sites are inaccessible.
NOTES:
First it attempts to save it downloaded file in %System% but if it fails, it will save its downloaded file in %User Temp%.
SOLUTION
9.300
9.558.02
29 Nov 2012
9.559.00
30 Nov 2012
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 files
- %System%\systemInfomations.ini
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_ISNEV.J. 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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