Backdoor.Win32.PLEAD.AI
Trojan.MauvaiseRI.S5253068(QUICKHEAL);
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It does not have any file infection routine.
It does not have any propagation routine.
It executes commands from a remote malicious user, effectively compromising the affected system.
It does not have any information-stealing capability.
TECHNICAL DETAILS
Arrival Details
This Backdoor arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Infection Points
This Backdoor does not have any file infection routine.
Installation
This Backdoor drops the following files:
- {malware path}\wmpnetwk.rtf -> contains strings from the resources.
- %User Temp%\{random number}.tmp -> contains date and time malware executed and MUTEX value
(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- {date and time executed}_19162222
Propagation
This Backdoor does not have any propagation routine.
Backdoor Routine
This Backdoor executes the following commands from a remote malicious user:
- Executes arbitrary commands
Rootkit Capabilities
This Backdoor does not have rootkit capabilities.
Information Theft
This Backdoor does not have any information-stealing capability.
Other Details
This Backdoor does the following:
- It will access the following URLs to get the arbitrary codes (However, the said sites don't contain arbitrary codes to execute as of publishing.):
- http://sakura.{BLOCKED}o.com/Default.jsp -> redirects to the 2nd URL
- https://www.{BLOCKED}mains.com/domain_profile.cfm?d=wesogo&e=com
SOLUTION
Step 1
Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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 this file
- %User Temp%\{random number}.tmp
- {malware path}\wmpnetwk.rtf
Step 4
Scan your computer with your Trend Micro product to delete files detected as Backdoor.Win32.PLEAD.AI. 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 the following Trend Micro Support pages for more information:
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