TROJ_UPATRE.ABG
Downloader.Upatre!gen5 (Symantec), TrojanDownloader:Win32/Upatre (Microsoft), Trojan-Downloader.Win32.Upatre.bjjo (Kaspersky), Trojan.Upatre.Gen.3 (BitDefender)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
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 modifies the Internet Explorer Zone Settings.
It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
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 a copy of itself in the following folders using different file names:
- %User Temp%\razacer.exe
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
It terminates the execution of the copy it initially executed and executes the copy it drops instead.
Web Browser Home Page and Search Page Modification
This Trojan modifies the Internet Explorer Zone Settings.
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- {BLOCKED}.{BLOCKED}.29.43/im12.png
- {BLOCKED}.{BLOCKED}.226.85/im12.png
- {BLOCKED}.{BLOCKED}.92.193/im12.png
- {BLOCKED}.{BLOCKED}.251.208/im12.png
- {BLOCKED}.{BLOCKED}.165.154/im12.png
- {BLOCKED}.{BLOCKED}.240.56/im12.png
- {BLOCKED}.{BLOCKED}.246.142/im12.png
- {BLOCKED}.{BLOCKED}.169.176/im12.png
- {BLOCKED}.{BLOCKED}.112.81/im12.png
- {BLOCKED}.{BLOCKED}.81.211/im12.png
- {BLOCKED}.{BLOCKED}.231.11/im12.png
- {BLOCKED}.{BLOCKED}.131.116/im12.png
- {BLOCKED}.{BLOCKED}.5.32/im12.png
- {BLOCKED}.{BLOCKED}.125.74/im12.png
- {BLOCKED}.{BLOCKED}.215.92/im12.png
- {BLOCKED}.{BLOCKED}.82.80/im12.png
- {BLOCKED}.{BLOCKED}.130.173/im12.png
- {BLOCKED}.{BLOCKED}.221.89/im12.png
- {BLOCKED}.{BLOCKED}.22.227/im12.png
- {BLOCKED}.{BLOCKED}.31.1/im12.png
- {BLOCKED}.{BLOCKED}.31.6/im12.png
- {BLOCKED}.{BLOCKED}.27.163/im12.png
- {BLOCKED}.{BLOCKED}.255.79/im12.png
- {BLOCKED}.{BLOCKED}.204.114/im12.png
- {BLOCKED}.{BLOCKED}.203.173/im12.png
- {BLOCKED}.{BLOCKED}.239.34/im12.png
- {BLOCKED}.{BLOCKED}.173.27/im12.png
- {BLOCKED}.{BLOCKED}.92.4/im12.png
- {BLOCKED}.{BLOCKED}.36.73/im12.png
- {BLOCKED}.{BLOCKED}.64.184/im12.png
- {BLOCKED}.{BLOCKED}.171.44/im12.png
- {BLOCKED}.{BLOCKED}.236.173/im12.png
- {BLOCKED}.{BLOCKED}.223.219/im12.png
- {BLOCKED}.{BLOCKED}.204.12/im12.png
- {BLOCKED}.{BLOCKED}.63.33/im12.png
- {BLOCKED}.{BLOCKED}.130.24/im12.png
- {BLOCKED}.{BLOCKED}.93.250/im12.png
- {BLOCKED}.{BLOCKED}.25.40/im12.png
- {BLOCKED}.{BLOCKED}.210.27/im12.png
- {BLOCKED}.{BLOCKED}.61.218/im12.png
- {BLOCKED}.{BLOCKED}.128.71/im12.png
- {BLOCKED}.{BLOCKED}.11.253/im12.png
- {BLOCKED}.{BLOCKED}.217.188/im12.png
- {BLOCKED}.{BLOCKED}.75.164/im12.png
- {BLOCKED}.{BLOCKED}.248.137/im12.png
- {BLOCKED}.{BLOCKED}.210.131/im12.png
- {BLOCKED}.{BLOCKED}.247.74/im12.png
- {BLOCKED}.{BLOCKED}.36.35/im12.png
- {BLOCKED}.{BLOCKED}.204.16/im12.png
- {BLOCKED}.{BLOCKED}.30.156/im12.png
It saves the files it downloads using the following names:
- %User Temp%\eprath.exe
(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)
Trend Micro detects the dowloaded file as:
- TSPY_DYRE.YYSIV
It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Information Theft
This Trojan gathers the following data:
- Host name
- OS version
- Service Pack
Other Details
This Trojan connects to the following URL(s) to get the affected system's IP address:
- icanhazip.com
It deletes the initially executed copy of itself
NOTES:
This Trojan connects to the following URLs to report infection of the affected system:
- http://188.120.194.101:{port}/Img12/{Hostname}/0/{OS Version}-{Service Pack}/0/{Value}
- http://188.120.194.101:{port}/Img12/{Hostname}/{Data}/{Data}/{Data}/{Value}
It installs authentication certificates to enable access to download sites.
SOLUTION
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Remove the malware/grayware file that dropped/downloaded TROJ_UPATRE.ABG. (Note: Please skip this step if the threat(s) listed below have already been removed.)
-
TSPY_DYRE.YYSIV
Step 4
Reset Internet security settings
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_UPATRE.ABG. 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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