MALWARE FAMILY

NOTROBIN

Internal ID: elf.notrobin

aliases

Last seen:Mar 17, 2026

Intelligence Profile

FireEye states that NOTROBIN is a utility written in Go 1.10 and compiled to a 64-bit ELF binary for BSD systems. It periodically scans for and deletes files matching filename patterns and content characteristics. The purpose seems to be to block exploitation attempts against the CVE-2019-19781 vulnerability; however, FireEye believes that NOTROBIN provides backdoor access to the compromised system.

Threat Analysis

NOTROBIN is a malware family tracked by threat intelligence researchers and catalogued in the Malpedia dataset. It represents a distinct malicious software lineage with identifiable code characteristics, behaviors, and victimology.

External References

→https://blog.dcso.de/a-curious-case-of-cve-2019-19781-palware-remove_bds/

→https://dcso.de/2020/01/16/a-curious-case-of-cve-2019-19781-palware-remove_bds/

→https://intezer.com/blog/linux/elf-malware-analysis-101-linux-threats-no-longer-an-afterthought

→https://news.sophos.com/en-us/2020/05/21/asnarok2/

→https://www.fireeye.com/blog/products-and-services/2020/01/rough-patch-promise-it-will-be-200-ok.html

→https://www.fireeye.com/blog/threat-research/2020/01/vigilante-deploying-mitigation-for-citrix-netscaler-vulnerability-while-maintaining-backdoor.html

→https://www.intezer.com/blog/cloud-security/top-linux-cloud-threats-of-2020/

→https://www.theregister.co.uk/2020/01/17/hackers_patch_citrix_vulnerability/

Quick Facts

TypeMalware Family

Aliases1

Also Known As

elf.notrobin

Research Links

MITRE ATT&CK VirusTotal Google (news) Twitter/X search

Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.

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