You will need the Tor Browser to visit the websites but you should already know that.

Ransomware group sites

GroupLink
54bb47hvisit
AlphaVMvisit
Arvin Clubvisit
AtomSilovisit
AvosLockervisit
Babukvisit
BlackBytevisit
Bl4ckt0rvisit
BlackMatter (former Darkside?)visit
Black Shadowvisit
Bonaci Groupvisit
CL0Pvisit
CONTIvisit
CoomingProjectvisit
DoppelPaymervisit
Entropyvisit
Griefvisit
Groovevisit
Haronvisit (auth: Chaddadgroup:Chaddadgroup)
Hivevisit
Hotarusvisit
Karma Leaksvisit
LockBit 2.0visit
LockData Auctionvisit
Lorenzvisit
LV BLOGvisit
MBCvisit
Midasvisit
Pay2Keyvisit
Payload.binvisit
Pysavisit
Quantumvisit
Ragnar_Lockervisit
Ragnarokvisit
RAMPvisit
RansomEXXvisit
REvilvisit
Rookvisit
Snatchvisit
Spookvisit
SynACKvisit
XING Teamvisit

Ransomware market sites

MarketLink
BlackByte Auctionvisit
Marketovisit
Dark Leak Marketvisit

Use the lists for good, not for evil. Just kidding, use them for whatever you want.