TSPY_BEBLOH.YMNPV
Trojan.Win32.Yakes.wxoh (Kaspersky), Trojan:Win32/Tiggre!rfn (Microsoft)
Windows
Threat Type: Trojan Spy
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
TECHNICAL DETAILS
176,640 bytes
EXE
Yes
07 Aug 2018
Connects to URLs/IPs, Downloads files, Drops files
Arrival Details
This Trojan Spy 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 Spy drops the following copies of itself into the affected system:
- %Program Files%\Windows NT\{random filename}.exe
- (Note: Creation of this copy is triggered when the affected system is shutting down)
(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), 7 (32-bit), and 8 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), 7 (64-bit), and 8 (64-bit).)
It adds the following processes:
- explorer.exe
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- Uz{Random Hex}
It injects codes into the following process(es):
- The created "explorer.exe" by this malware
Autostart Technique
This Trojan Spy adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random string} = "%Application Data%\{random string}.lnk"
- (Note: Creation of this registry entry is triggered when the affected system is shutting down)
Other System Modifications
This Trojan Spy adds the following registry keys:
HKEY_LOCAL_MACHINE\SOFTWARE\{Random Key}
It adds the following registry entries:
HKEY_CURRENT_USER\Software\{random key}
(Default) = {Hex Values}
Information Theft
This Trojan Spy gathers the following data:
- Machine Name
- OS Information (Version, Product ID, Name, Install Date)
- Explorer File Information
- Volume Serial Number
- Network Configuration (IP address, Socket, Ports)
- Keyboard Layout
Stolen Information
This Trojan Spy sends the gathered information via HTTP POST to the following URL:
- https://{BLOCKED}exir.com/auth/tver={value}&vcmd={value}&cc={value}&hh={hex values}&ipcnf={IP address}+&sckport={value}&pros={value}&keret={value};&email={value}
Other Details
This Trojan Spy connects to the following URL(s) to check for an Internet connection:
- www.google.com
It does the following:
- It connects to the following website to send and receive information:
- https://{BLOCKED}exir.com/auth/
- {Random Generated Domain}.com
- {Random Generated Domain}.net
- It does the following:
- Update itself
- It does not proceed to its malicious routine if it detects that it is running in a Virtual environment
- It deletes the cache files of Google Chrome and Mozilla Firefox
- This malware does any of the following depending on the reply from the C&C:
- Sleep and wait for next reply
- Receive download URL to download other possibly malicious files
- The file names used for its dropped copy may contain the following strings combined with random characters:
- def
- dns
- exec
- hlp
- logon
- mem
- mixer
- mon
- pack
- play
- setup
- srv
- user
- video
- win
- It may also use a purely random set of characters as filename for its dropped copy.
SOLUTION
9.850
14.426.06
06 Aug 2018
14.427.00
07 Aug 2018
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 key
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 string} = "%Application Data%\{random string}.lnk"
- {random string} = "%Application Data%\{random string}.lnk"
- In HKEY_LOCAL_MACHINE\SOFTWARE
- {Random Key}
- {Random Key}
Step 5
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\{random key}
- (Default) = {Hex Values}
- (Default) = {Hex Values}
Step 6
Search and delete this file
- %Program Files%\Windows NT\{random filename}.exe
Step 7
Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_BEBLOH.YMNPV. 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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