Skip to content
Nation-state APTEspionageAdvanced sophistication · State-backed

Andariel

Andariel is a North Korea-attributed nation-state APT group with an espionage motive, tracked by Brandefense. It targets 17 sectors, including Government and Technology, in 40 countries, including the United States and the United Kingdom. It uses 95 MITRE ATT&CK techniques and exploits 37 known CVEs.

Also known as
  • Silent Chollima
  • PLUTONIUM
  • Onyx Sleet
  • Guardian of Peace
  • Stonefly
  • APT 45
  • Jumpy Pisces
  • G0138
  • Operation “BLACKMINE”
  • Operation “GHOSTRAT”
  • Operation “XEDA”
  • Operation “INITROY”/Phase 1
  • Operation “DESERTWOLF”/Phase 3
  • Operation “BLACKSHEEP”/Phase 3.
  • Operation “INITROY”/Phase 2
  • Operation “VANXATM”
  • Operation “Mayday”
  • Operation “GoldenAxe”
  • Operation “Blacksmith”
Techniques
95
Exploited CVEs
37
First seen
Jul 3, 2024
Last seen
Dec 11, 2024
Record updated

Who They Target.

About Andariel.

Andariel is a North Korean state-sponsored threat group that has been active since at least 2009. Andariel has primarily focused its operations--which have included destructive attacks--against South Korean government agencies, military organizations, and a variety of domestic companies; they have also conducted cyber financial operations against ATMs, banks, and cryptocurrency exchanges. Andariel's notable activity includes Operation Black Mine, Operation GoldenAxe, and Campaign Rifle. Andariel is considered a sub-set of Lazarus Group, and has been attributed to North Korea's Reconnaissance General Bureau. North Korean group definitions are known to have significant overlap, and some security researchers report all North Korean state-sponsored cyber activity under the name Lazarus Group instead of tracking clusters or subgroups.

Last updated Oct 19, 2026. Compiled by Brandefense technologies from structured threat intelligence and reviewed by Brandefense analysts. Techniques follow the MITRE ATT&CK framework.