TROJ_UPATRE.ZBX
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:
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 executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
TECHNICAL DETAILS
13,824 bytes
EXE
No
20 Nov 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.
Installation
This Trojan drops the following copies of itself into the affected system and executes them:
- %User Temp%\lss.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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.)
Download Routine
This Trojan downloads the file from the following URL and renames the file when stored in the affected system:
- {BLOCKED}e.be/shop/misc/textarea.exe
- www.{BLOCKED}orship.org/images/index.exe
It saves the files it downloads using the following names:
- %User Temp%\lssq.exe
- %Temporary Internet Files%\Content.IE5\{random folder}\textarea[1].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, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files 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.
SOLUTION
9.700
10.424.03
21 Nov 2013
10.425.00
21 Nov 2013
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 this file
- %User Temp%\lssq.exe
Step 3
Scan your computer with your Trend Micro product to delete files detected as TROJ_UPATRE.ZBX. 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.
NOTES:
To delete the file %Temporary Internet Files%\Content.IE5\{random folder}\textarea[1].exe:
- Go to Start>Search
- Click All files and folders and input the following information:
textarea[1].exe
Look in: %Temporary Internet Files%\Content.IE5 - Once located, select the file then press SHIFT+DELETE to permanently delete the file.
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