Fbot Botnet

Fbot is a newly observed Satori-based botnet, whose sole purpose appears to be removing another piece of malware from affected devices.

Threat ID:: CC-2677
Category:: Botnet
Threat Severity:: Low
Threat Vector:: Exploit, Insecure network
Published:: 19 September 2018 12:00 AM

Report a cyber attack: call 0300 303 5222 or email [email protected]

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Summary

Fbot is a newly observed Satori-based botnet, whose sole purpose appears to be removing another piece of malware from affected devices.

Affected platforms

The following platforms are known to be affected:

Android

Google Android - All versions
IoT Devices

Threat details

Like most other Mirai-based malware, Fbot scans the Internet for vulnerable Internet-of-Things (IoT) devices before using known exploits or a list of hard-coded credentials to gain access to them.

Once installed, Fbot uses OpenNIC to connect to a command and control server on the decentralised domain name service EmerDNS. It will then uses a pair of scripts to search for and remove com.ufo.miner, a variant of the ADBminer cryptocurrency miner.

Fbot still contains Satori's distributed denial-of-service module, although it appears to be disabled in all known variants.

Remediation advice

To prevent and detect an infection, ensure that:

Remediation steps

Type	Step
	A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails. All operating systems, antivirus and other security products are kept up to date. All day to day computer activities such as email and internet are performed using non-administrative accounts. Strong password policies are in place and password reuse is discouraged. Network, proxy and firewall logs should be monitored for suspicious activity. User accounts accessed from infected machines should be reset on a clean computer. Additionally, ports 37125 and 52869 should be monitored and, if not in use, be disabled. Default credentials and security settings on IoT devices (IP cameras, door sensors, etc) should be altered.

Type

Step

A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails.
All operating systems, antivirus and other security products are kept up to date.
All day to day computer activities such as email and internet are performed using non-administrative accounts.
Strong password policies are in place and password reuse is discouraged.
Network, proxy and firewall logs should be monitored for suspicious activity.
User accounts accessed from infected machines should be reset on a clean computer.

Additionally, ports 37125 and 52869 should be monitored and, if not in use, be disabled. Default credentials and security settings on IoT devices (IP cameras, door sensors, etc) should be altered.

Last edited: 18 January 2022 8:39 am