MALWARE FAMILY
Unidentified 115 (Nim Loader)
Internal ID: win.unidentified_115
1
aliases
Last seen:Mar 17, 2026
Intelligence Profile
According to Walmart, this is a loader written in Nim that contains an AmsiScanBuffer patch followed by a EtwEventWrite patch and that will download/decrypt a payload via AES CFB and inject it into a hardcoded process target (e.g. explorer.exe).
Threat Analysis
Unidentified 115 (Nim Loader) 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
Quick Facts
TypeMalware Family
Aliases1
Also Known As
win.unidentified_115
Research Links
Data sourced from Malpedia, Ransomware.live, RansomLook, and CTIWATCH OSINT collection. Actor attribution is based on available intelligence and may be incomplete.