BACKDOOR.WIN32.PACAVI.THABAGAH
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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 connects to a website to send and receive information.
It gathers certain information on the affected computer.
TECHNICAL DETAILS
688,640 bytes
DLL
Yes
17 Dec 2018
Modifies system registry, Connects to URLs/IPs, Collects system information, Steals information, Others
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.
This malware arrives via the following means:
- Dropped by:
Installation
This Backdoor adds the following processes:
- %System%\svchost.exe -k
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It injects codes into the following process(es):
- Created svchost.exe
Autostart Technique
This Backdoor adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
222 = %Application Data%\TeamViewer\TeamViewer.exe
Other System Modifications
This Backdoor adds the following registry entries:
HKEY_CURRENT_USER\Software\Google\
Update
DataC = {BLOCKED}.{BLOCKED}.144.220:443
HKEY_CURRENT_USER\Software\Google\
Common\Rlz\Events
vp = {Random Numbers}
Backdoor Routine
This Backdoor connects to the following websites to send and receive information:
- {BLOCKED}.{BLOCKED}.144.220:443
Information Theft
This Backdoor gathers the following information on the affected computer:
- Computer Username
- Primary Disk Name and Serial ID
Other Details
This Backdoor does the following:
- It is capable of the following:
- Remote access/control
SOLUTION
9.850
14.752.03
15 Jan 2019
14.753.00
16 Jan 2019
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.
- HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- 222 = %Application Data%\TeamViewer\TeamViewer.exe
- HKEY_CURRENT_USER\Software\Google\Update
- DataC = 185.206.144.220:443
- HKEY_CURRENT_USER\Software\Google\Common\Rlz\Events
- vp = {Random Numbers}
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as BACKDOOR.WIN32.PACAVI.THABAGAH. 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.
Did this description help? Tell us how we did.