TSPY_URSNIF.YNQ
TrojanSpy:Win32/Ursnif.gen!P(Microsoft)
Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)
Threat Type: Spyware
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Downloaded from the Internet
This spyware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It steals certain information from the system and/or the user.
It connects to certain websites to send and receive information.
TECHNICAL DETAILS
278,528 bytes
EXE
Yes
21 Aug 2014
Connects to URLs/IPs
Arrival Details
This spyware 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 spyware drops the following copies of itself into the affected system:
- %System%\{random file name}.exe
(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)
It drops the following files:
- {malware path}\{random value}.bat -used to delete the initial copy of malware and delete itself
Autostart Technique
This spyware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random} = "%System%\{random file name}.exe"
Other System Modifications
This spyware adds the following registry keys:
HKEY_CURRENT_USER\SOFTWARE\AppDataLow\
{GUID}
It adds the following registry entries:
HKEY_CURRENT_USER\Software\AppDataLow\
{GUID}
Client = "{hex values}"
Information Theft
This spyware steals the following information:
- Digital Certificates
- Capture Screenshot
- Computer Name
- List Processes
- List Contents on this registry: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\
- System Information
- Steal Cookies
- List Drivers
Other Details
This spyware connects to the following website to send and receive information:
- http://{BLOCKED}e.su/zzz_img/flib/xxx/{string}
- http://{BLOCKED}e.su/zzz_img/flib/xxx/{string}
- http://{BLOCKED}tion.su/zzz_img/flib/xxx/{string}
It does the following:
- Save stolen information in a file and upload
- Monitor Internet browsing activities
- Injects code to normal processes
SOLUTION
9.700
10.996.02
20 Aug 2014
10.997.00
21 Aug 2014
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
Restart in Safe Mode
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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- {random} = "%System%\{random file name}.exe"
- {random} = "%System%\{random file name}.exe"
Step 5
Search and delete this file
- {malware path}\{random value}.bat
Step 6
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_URSNIF.YNQ. 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 7
The following created files/folders/registry keys/registry entries cannot be identified by the user since there are no reference values in the created key. The only way it can be identified is by comparing the present system information with a backup. Note that the said components do not have to be deleted since it won't be harmful to the system.
- In HKEY_CURRENT_USER\SOFTWARE\AppDataLow
- {GUID}
- {GUID}
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