Registered · Windows

1604 DarkComet RAT

TCP Unofficial
UDP —
SCTP —
DCCP —

What it is

DarkComet remote-access trojan default.

When / why

Malware indicator — investigate any listener here.

Protocol status detail

TransportStatusMeaning
TCP Unofficial Not assigned by IANA, but standardized, specified, or widely used on this port.
UDP — Not applicable for this transport.
SCTP — Not applicable for this transport.
DCCP — Not applicable for this transport.
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Port range

Registered (1024–49151). Assigned by IANA on request; usable without elevated privileges on most systems.

Browse all ports →

Firewall rules for port 1604

Copy-ready inbound rules for the active transports. Replace every <source> placeholder with the specific host, subnet, or CIDR that should reach this port.

⚠ High exposure risk — this service should never be reachable from untrusted networks. Scope the rule to a management subnet or VPN.

ufw

sudo ufw allow proto tcp from <source> to any port 1604

Allow TCP 1604 (DarkComet RAT). Replace <source> with the network/host that should reach it.

firewalld

sudo firewall-cmd --permanent --add-rich-rule='rule family="ipv4" source address="<source>" port port="1604" protocol="tcp" accept'

Allow TCP 1604 (DarkComet RAT) from <source>. Run 'firewall-cmd --reload' afterwards.

nftables

nft add rule inet filter input ip saddr <source> tcp dport 1604 accept

Allow TCP 1604 (DarkComet RAT). Assumes table 'inet filter' with an 'input' chain.

iptables

sudo iptables -A INPUT -p tcp -s <source> --dport 1604 -j ACCEPT

Allow TCP 1604 (DarkComet RAT). Persist with iptables-save/netfilter-persistent.

Azure NSG

az network nsg rule create -g <resource-group> --nsg-name <nsg> -n Allow-darkcometrat-1604 --priority 1000 --access Allow --direction Inbound --protocol TCP --source-address-prefixes <source> --destination-port-ranges 1604

Inbound rule for 1604 (DarkComet RAT). Set <source> to a CIDR; lower priority number = higher precedence.

AWS Security Group

aws ec2 authorize-security-group-ingress --group-id <sg-id> --ip-permissions IpProtocol=tcp,FromPort=1604,ToPort=1604,IpRanges="[{CidrIp=<source-cidr>}]"

Inbound TCP 1604 (DarkComet RAT). Replace <source-cidr> (e.g. 10.0.0.0/16).

GCP firewall

gcloud compute firewall-rules create allow-darkcometrat-1604 --direction=INGRESS --action=ALLOW --rules=tcp:1604 --source-ranges=<source-cidr> --network=<network>

Ingress rule for 1604 (DarkComet RAT). Scope with --source-ranges and optionally --target-tags.

Windows netsh

netsh advfirewall firewall add rule name="Allow DarkComet RAT 1604/TCP" dir=in action=allow protocol=TCP localport=1604 remoteip=<source>

Inbound TCP 1604 (DarkComet RAT). Set remoteip to a host/subnet; 'any' is discouraged.

Windows PowerShell

New-NetFirewallRule -DisplayName "Allow DarkComet RAT 1604/TCP" -Direction Inbound -Action Allow -Protocol TCP -LocalPort 1604 -RemoteAddress <source>

Inbound TCP 1604 (DarkComet RAT). Replace <source> with a host or subnet.

Rules are generated only for transports marked active for this port. They default to an inbound allow with an explicit source placeholder — never any. Review direction, scope, and rule precedence before applying in production.