BKDR_COBEACON.F
Trojan.PowerShell.Rozena (Ikarus), TrojanDropper:PowerShell/Ploty.C (Microsoft)
Windows
![](/vinfo/imgFiles/legend.jpg)
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 executes commands from a remote malicious user, effectively compromising the affected system.
It steals certain information from the system and/or the user.
However, as of this writing, the said sites are inaccessible.
TECHNICAL DETAILS
278,430 bytes
PS1
Yes
31 Jul 2018
Compromises system security, Steals information, Connects to URLs/IPs
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.
Backdoor Routine
This Backdoor executes the following commands from a remote malicious user:
- Add or modify an environment variable
- Alternate Parent Process
- Change file time
- Escalate privilege
- Execute PowerShell commands
- File System Commands
- Get Drives
- Inject Code into a process
- List Processes
- Manage Service
- Open a process
- Sleep
- Steal or Make token
- Terminate process
- Upload and Download Files
- Use and Purge Kerberos Tickets
- Create, Connect and Disconnect to named pipe
Information Theft
This Backdoor steals the following information:
- Malware Process ID
- Operating System Version
- IP Address
- Computer Name
- User name
Other Details
This Backdoor does the following:
- It connects to the following DNS Server and URL to send and receive information:
- {random numbers}.ns7.{BLOCKED}ervice.com/updates.rss
- {random numbers}.ns8.{BLOCKED}ervice.com/pixel.gif
- {random numbers}.ns9.{BLOCKED}ervice.com/dot.gif
- It uses a named pipe to send and receive commands.
However, as of this writing, the said sites are inaccessible.
SOLUTION
9.850
14.418.04
02 Aug 2018
14.419.00
03 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
Identify and terminate files detected as BKDR_COBEACON.F
- Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
- If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 3
Scan your computer with your Trend Micro product to delete files detected as BKDR_COBEACON.F. 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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