Mythic C2 Detected – 189.141.53.203189[.]141[.]53[.]203:7443

The host exposes a Mythic web interface on HTTPS port 7443. The page redirects to /new/login and uses Mythic-branded content and a self-issued Mythic TLS certificate.

Why this matters and what to do now

What : A Mythic C2 management interface is publicly reachable over HTTPS.

Why : Unauthorised access could expose operators, agents, tasking, credentials, and collected data. The endpoint also provides a durable fingerprint for hostile reconnaissance.

Do now : Confirm whether 189[.]141[.]53[.]203:7443 is authorised and has a documented owner.

Do now : Restrict port 7443 to approved administration networks through firewall or VPN controls.

Do now : Review Mythic authentication, administrator accounts, agents, task history, and audit logs for unauthorised activity.

Do now : Rotate potentially exposed credentials, tokens, and certificates after reviewing access logs.

Do now : enterprise telemetry for connections to 189[.]141[.]53[.]203, the JARM value, and the Mythic login path.

The evidence is strongly consistent with an exposed Mythic command-and-control management interface. The Mythic title, application paths, JavaScript bundle, login redirect, and certificate organisation provide mutually supporting indicators. Authentication appears to be enabled, but exposure of the management interface still presents a significant operational risk. The data does not establish who operates the instance, whether active agents are connected, or whether the host is malicious. It may be an authorised security testing system, a compromised deployment, or infrastructure exposed unintentionally. Attribution to the listed organisation or location is not supported by this data alone.

Alert on outbound or inbound HTTPS connections to 189[.]141[.]53[.]203:7443.

proxy, firewall, and DNS logs for requests to /new/login and /new/favicon[.]ico.

Hunt TLS telemetry for JARM 1dd40d40d00040d00042d43d000000831b6af40378e2dd35eeac4e9311926e and JA3S 574866101f64002c6421cc329e4d5458.

Identify systems communicating with Mythic-related web titles or certificates whose organisation is Mythic.

Review authentication and agent activity on any internal Mythic deployment for unexpected source addresses or recent tasking.

Remove direct internet exposure of the Mythic management interface.

Permit administrative access only through a VPN, bastion host, or tightly scoped allow-list.

Enforce multi-factor authentication and strong, unique administrator credentials.

Apply current Mythic and operating system security updates.

Restrict agent callback paths and egress traffic to approved destinations.

Enable centralised logging and retain web, authentication, operator, and agent audit events.

Replace the exposed certificate and rotate credentials if unauthorised access cannot be ruled out.

High, The Mythic title, application structure, login path, TLS certificate, and service fingerprints consistently identify a Mythic web interface.

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