Netskope Threat Labs

Khonsari

ATP Sandbox Adv. HeuristicsAV

Khonsari is a compact ransomware written in .NET that targets Windows servers. It arrived as a follow-up payload to exploitation of the Log4j vulnerability, which placed it among the threats delivered through that widespread exposure.

First seen
February 2022
Last seen
October 2026
Alert Name
ByteCode-MSIL.Ransomware.Khonsari
Trojan.Khonsari.A
Trojan.Khonsari.B
Trojan.Ransom.Khonsari.B
Win32.Ransomware.Khonsari