TSPY_BANKER.YWNRC
TrojanSpy:Win32/Banker!rfn (Microsoft)
Windows
Threat Type: Spyware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This is the Trend Micro detection for a bank information stealer which is a modified Themida Packed file.
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 connects to certain websites to send and receive information.
TECHNICAL DETAILS
4,136,960 bytes
EXE
Themida
No
26 Oct 2016
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:
- %User Temp%\{malware name}.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.)
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
{malware name} = "%User Temp%\{malware name}.exe"
Other Details
This spyware connects to the following website to send and receive information:
- http://{BLOCKED}b00.com/bolo1/notify.php
NOTES:
This spyware checks for the presence of the following virtual environments:
- Virtual Box
- Wine Emulator
It checks the presence of known windows from debuggers and forensic tools:
- OLLYDBG
- GBDYLLO
- pediy06
- FilemonClass
- File Monitor - Sysinternals: www.sysinternals.com
- PROCMON_WINDOW_CLASS
- Process Monitor - Sysinternals: www.sysinternals.com
- RegmonClass
- Registry Monitor - Sysinternals: www.sysinternals.com
- 18467-41
SOLUTION
9.800
12.860.02
26 Oct 2016
12.861.00
27 Oct 2016
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
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
- {malware name} = "%User Temp%\{malware name}.exe"
- {malware name} = "%User Temp%\{malware name}.exe"
Step 4
Scan your computer with your Trend Micro product to delete files detected as TSPY_BANKER.YWNRC. 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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