Using audit logs will suffice (you will need to give the bot perms). Using GuildAuditLogsEntry.executor and GuildAuditLogsEntry.target. Here is an implementation (it will check if the member is a bot and if they are, do something of your choice)

client.on("guildMemberAdd", async (member) => {
  if (!member.user.bot) return;
  const auditLogs = await member.guild.fetchAuditLogs({type: "BOT_ADD"})
  const auditLog = auditLogs.entries.first()
  //you can take ban with "auditLog.executor.ban()"
  //you can also ban the bot with "auditLog.target.ban"
})

^{Tested on discord.js v13}