The host at this IP address is obviously operated by cybercriminals. It is running a malware botnet controller which is being used to control infected computers (bots) around the globe using a trojan horse.
Malware botnet controller located at 159.203.126.35 on port 22339 TCP:
$ telnet 159.203.126.35 22339
Trying 159.203.126.35…
Connected to 159.203.126.35.
Escape character is ‘^]’
$ nslookup 159.203.126.35
us-east-65319.packetriot.net
$ dig +short us-east-65319.packetriot.net
159.203.126.35
Referencing malware samples (MD5 hash):
24ef04901153bbd17c7f6085b10b4733 — AV detection: 32 / 69 (46.38%)
91522c751acec7a53d40eacd916ace03 — AV detection: 19 / 68 (27.94%)
a11f738961475ee432cfd6e03330f0a8 — AV detection: 35 / 70 (50.00%)
b42a7f2b94d123eb16f9eed5a547d416 — AV detection: 44 / 69 (63.77%)
c00feb66003749aab58d2bb60a91b245 — AV detection: 46 / 70 (65.71%)
ea11365a569a1453b9d81799d75b6f1a — AV detection: 20 / 65 (30.77%)