Jade Sleet / TraderTraitor / UNC4899 / Pressure Chollima
Jade Sleet / TraderTraitor / UNC4899 / Pressure Chollima (canonical US Government / FBI / CISA / Treasury naming "TraderTraitor" per April 2022 joint advisory.
Microsoft "Jade Sleet".
Mandiant / Google Threat Intelligence Group "UNC4899".
CrowdStrike "Pressure Chollima".
Proofpoint "TA444".
Palo Alto Networks Unit 42 "Slow Pisces".
industry research "Pukchong") is the Democratic People's Republic of Korea (DPRK) Reconnaissance General Bureau (RGB), likely 3rd Bureau of Foreign Intelligence, financially-motivated cryptocurrency-focused subgroup of the broader Lazarus Group RGB ecosystem with formal US Government attribution per April 2022 FBI + CISA + Treasury joint advisory.
operating publicly since 2020 (TraderTraitor era) with primary operational mission objectives of cryptocurrency theft for DPRK regime nuclear weapons program funding and international sanctions circumvention.
operationally responsible for the largest cryptocurrency thefts in history including ByBit Safe{Wallet} $1.5B+ ETH heist (late 2024 / 2025, largest crypto heist ever at time of writing) via macOS developer workstation compromise + AWS session token theft bypassing MFA + Safe{Wallet} Next.js frontend JavaScript injection for transaction redirect, plus DMM Bitcoin $308M heist May 2024 via Ginco developer compromised through bogus GitHub coding challenge + RN Loader + RN Stealer Python malware for SSH key + session cookie theft + 4,502.9 BTC exfiltration.
signature operational tradecraft of supply- chain compromise targeting cloud service providers (JumpCloud June 22 2023 sophisticated spear-phishing campaign against zero-trust directory platform with downstream cryptocurrency customers compromised via init.rb malicious Ruby script through JumpCloud agent + FULLHOUSE.DOORED + STRATOFEAR backdoors + TIEDYE macOS Mach-O backdoor xpc.protect + macOS keychain targeting)
GitHub + npm package compromise tradecraft (July 2023 GitHub Security Lab disclosure of low-volume social engineering targeting blockchain + cryptocurrency + online gambling + cybersecurity sector employees via fake recruiter personas on GitHub + LinkedIn + Slack + Telegram with high-paying job offer lures and GitHub repository collaboration invites)
trojanized cryptocurrency applications (DAFOM + TokenAIS + CryptAS + AppleJeus) with fraudulently-obtained code-signing certificates masquerading as legitimate trading/price- prediction tools.
ORB + L2TP IPsec + commercial VPN (ExpressVPN + NordVPN + TorGuard final hop) multi-hop tunneling infrastructure.
definitive DPRK attribution via Mandiant operational OPSEC fumble revealing UNC4899 connecting directly to attacker-controlled ORB from Ryugyong-dong Pyongyang 175.45.178.0/24 netblock.
operationally distinct from sibling DPRK clusters in corpus (lazarus_group parent umbrella + apt38_bluenoroff SWIFT bank theft + andariel + sapphire_sleet crypto theft via social engineering only + moonstone_sleet DeTankWar fake game + citrine_sleet + contagious_interview + kimsuky espionage + apt37_reaper espionage + darkseoul_operators historical, all curated separately) through signature supply-chain compromise tradecraft + cryptocurrency theft mission focus.
fills DPRK supply-chain specialist cell in the curated corpus as 11th DPRK cluster.