MALWARE FAMILY

KeyBase

Internal ID: win.keybase

aliases

Last seen:Mar 17, 2026

Intelligence Profile

KeyBase is a .NET credential stealer and keylogger that first emerged in February 2015. It often incorporates Nirsoft tools such as MailPassView and WebBrowserPassView for additional credential grabbing.

Threat Analysis

KeyBase 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://voidsec.com/keybase-en/

→https://unit42.paloaltonetworks.com/keybase-threat-grows-despite-public-takedown-a-picture-is-worth-a-thousand-words/

→https://unit42.paloaltonetworks.com/keybase-keylogger-malware-family-exposed/

→https://community.rsa.com/community/products/netwitness/blog/2018/02/15/malspam-delivers-keybase-keylogger-2-11-2017

→https://www.virusbulletin.com/virusbulletin/2016/07/new-keylogger-block/

→https://th3l4b.blogspot.com/2015/10/keybase-loggerclipboardcredsstealer.html

→https://isc.sans.edu/forums/diary/Malicious+Office+files+using+fileless+UAC+bypass+to+drop+KEYBASE+malware/22011/

Quick Facts

TypeMalware Family

Aliases1

Also Known As

win.keybase

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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