TROJ_UPATRE.MSF
TrojanDownloader:Win32/Upatre.AA(Microsoft);Mal/Upatre-I(Sophos);Gen:Variant.Daytre.1(BitDefender)
Windows
![](/vinfo/imgFiles/legend.jpg)
Threat Type: Trojan
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Spammed via email, Downloaded from the Internet
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It 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.
It deletes the initially executed copy of itself.
TECHNICAL DETAILS
27,648 bytes
EXE
No
19 Feb 2015
Connects to URLs/IPs
Arrival Details
This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It 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%\instview.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 drops the following files:
- %User Temp%\mmo978FR.txt
(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.)
Other System Modifications
This Trojan adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion
marker_gjru_fbegrihlgm = TRUE
Download Routine
This Trojan accesses the following websites to download files:
- http://{BLOCKED}x.uk.com/images/t_image.jpg
- http://{BLOCKED}solutions.com/icons/t_image.jpg
It saves the files it downloads using the following names:
- %User Temp%\{random 6 letter}{random number}.exe - detected as TSPY_DYRE.YYYW
(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 then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.
Other Details
This Trojan connects to the following URL(s) to get the affected system's IP address:
- http://checkip.dyndns.org
It deletes the initially executed copy of itself
NOTES:
This Trojan also accesses the URL {BLOCKED}.{BLOCKED}.99.70:12127/1102us21/{COMPUTER NAME}/0/{OS VERSION}/0/{ENCRYPTED IP} before download. It then accesses the URL {BLOCKED}.{BLOCKED}.99.70:12126/1102us21/{COMPUTER NAME}/41/7/4/ after the downloaded file is executed.
SOLUTION
9.750
11.472.08
11 Feb 2015
11.473.00
12 Feb 2015
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
Search and delete these files
- %User Temp%\mmo978FR.txt
- %User Temp%\{random 6 letter}{random number}.exe
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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion
- marker_gjru_fbegrihlgm = TRUE
- marker_gjru_fbegrihlgm = TRUE
Step 5
Scan your computer with your Trend Micro product to delete files detected as TROJ_UPATRE.MSF. 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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