Trojan.Linux.SSHBRUTE.B
Linux
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Threat Type: Trojan
Destructiveness: No
Encrypted: No
In the wild: Yes
OVERVIEW
This Trojan 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
Arrival Details
This Trojan 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 adds the following processes:
- sleep 15s && cd /var/tmp; echo {base-64 encoded commands} | base64 --decode | bash
Other Details
This Trojan does the following:
- It performs SSH brute force to the list of IP addresses from the [IPs/IPs Port FILE] input file and uses the credentials given by the [[USER PASS] FILE] input file.
- It acts as a spreader by downloading and executing the main module of the malware from the following FTP sites:
- {BLOCKED}.{BLOCKED}.148.129:22
- {BLOCKED}.{BLOCKED}.148.125:22
- The downloaded file is saved using the following name:
- dota3.tar.gz → detected as Trojan.Linux.DITERTAG.USELVLA19
It accepts the following parameters:
- Usage: scan [OPTIONS] [[USER PASS]] FILE] [IPs/IPs Port FILE]
Options:- -t [NUMTHREADS] → specifies the number of threads to be used
- -m [MODE] → indicates scan mode
- -f [FINAL SCAN] → performs a final scan on found servers
- -i [IP SCAN] → scans specific IP range
- -P [PASSWORD] → changes password
- -s [TIMEOUT] → changes timeout
- -S [2ndTIMEOUT] → changes second timeout
- -p [PORT] → specifies port to connect to
- -c [REMOTE-COMMAND] → executes arbitrary commands on connect
- -h → shows this help
- -H 1 → shows extra help
SOLUTION
Scan your computer with your Trend Micro product to delete files detected as Trojan.Linux.SSHBRUTE.B. 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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