Backdoor.Linux.KINSING.A
Trojan:Linux/Shmusho!MSR (MICROSOFT)
Linux
Threat Type: Backdoor
Destructiveness: No
Encrypted: No
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 propagation routine.
It runs certain commands that it receives remotely from a malicious user. Doing this puts the affected computer and information found on the computer at greater risk.
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.
Installation
This Backdoor adds the following folders:
- /tmp/.ICEd-unix
- /var/tmp/.ICEd-unix
It drops and executes the following files:
- /tmp/kdevtmpfsi
Propagation
This Backdoor does not have any propagation routine.
Backdoor Routine
This Backdoor executes the following command(s) from a remote malicious user:
- Download and execute a file
- Update downloaded files
- Execute a command
- Execute a command and send output to {Server}/o
- Create an HTTP request
- Create a TCP request
- Brute-force Redis instances
Rootkit Capabilities
This Backdoor does not have rootkit capabilities.
Process Termination
This Backdoor terminates the following processes if found running in the affected system's memory:
- kdevtmpfsi
Information Theft
This Backdoor gathers the following data:
- OS Version
- OS Name
- OS Architecture
Stolen Information
This Backdoor sends the gathered information via HTTP POST to the following URL:
- {Server}/r
Other Details
This Backdoor does the following:
- This backdoor checks for the connection to the following URL to choose which C2 server to send and receive information:
- http://{BLOCKED}.{BLOCKED}.88.102
- http://{BLOCKED}.{BLOCKED}.169.111
- http://{BLOCKED}.{BLOCKED}.50.255
- http://{BLOCKED}.{BLOCKED}.87.220
- http://{BLOCKED}.{BLOCKED}.220.193
- This backdoor receives its commands via HTTP GET to the following URL:
- {Server}/get
It does not exploit any vulnerability.
SOLUTION
Scan your computer with your Trend Micro product to delete files detected as Backdoor.Linux.KINSING.A. 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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