# [HIGH] Setting up SSL/TLS for Kubernetes Ingress

**Source:** Snyk
**Published:** 2022-11-17
**Article:** https://snyk.io/blog/setting-up-ssl-tls-for-kubernetes-ingress/

## Threat Profile

Snyk Blog In this article
Written by Peter De Tender 
November 17, 2022
0 mins read Today, web and mobile applications and API-based microservice endpoints are becoming the default. These applications are reachable through the HTTP web protocol. The encryption provided by a Secured Socket Layer or Transport Layer Security (SSL/TLS) is a must to secure the communication between client and server and across API back-ends.
SSL/TLS are certificate-based encryption mechanisms. SSL has been the standa…

## Indicators of Compromise (high-fidelity only)

- _No high-fidelity IOCs in the RSS summary._ If the source publishes a technical write-up with defanged IOCs in the body, those would be picked up automatically on the next pipeline run.

## MITRE ATT&CK Techniques

- **T1053.005** — Scheduled Task
- **T1543.003** — Windows Service
- **T1053.005** — Persistence (article-specific)
- **T1543.003** — Persistence (article-specific)

## Kill chain phases observed

_(none detected from narrative keywords)_

## Recommended hunts

### Scheduled task created with suspicious image / encoded args

`UC_SCHEDULED_TASK` · phase: **install** · confidence: **High**

**Splunk SPL (CIM):**
```spl
| tstats `summariesonly` count min(_time) as firstTime max(_time) as lastTime
    from datamodel=Endpoint.Processes
    where Processes.process_name="schtasks.exe" AND Processes.process="*/create*"
      AND (Processes.process="*powershell*" OR Processes.process="*cmd.exe*"
        OR Processes.process="*rundll32*" OR Processes.process="*-enc*"
        OR Processes.process="*FromBase64*" OR Processes.process="*\Users\Public*"
        OR Processes.process="*\AppData\*")
    by Processes.dest, Processes.user, Processes.process, Processes.parent_process_name
| `drop_dm_object_name(Processes)`
```

**Defender KQL:**
```kql
DeviceProcessEvents
| where Timestamp > ago(7d)
| where AccountName !endswith "$"
| where FileName =~ "schtasks.exe"
| where ProcessCommandLine has "/create"
| where ProcessCommandLine has_any ("powershell","cmd.exe","rundll32","-enc","FromBase64","\Users\Public","\AppData\")
| project Timestamp, DeviceName, AccountName, ProcessCommandLine, InitiatingProcessFileName
```

### Service install for persistence — sc.exe / new service registry write

`UC_SERVICE_PERSIST` · phase: **install** · confidence: **High**

**Splunk SPL (CIM):**
```spl
| tstats `summariesonly` count min(_time) as firstTime max(_time) as lastTime
    from datamodel=Endpoint.Processes
    where Processes.process_name="sc.exe" AND Processes.process="*create*"
      AND (Processes.process="*\Users\*" OR Processes.process="*\AppData\*"
        OR Processes.process="*\ProgramData\*" OR Processes.process="*\Temp\*")
    by Processes.dest, Processes.user, Processes.process, Processes.parent_process_name
| `drop_dm_object_name(Processes)`
| append
    [| tstats `summariesonly` count from datamodel=Endpoint.Registry
        where Registry.registry_path="*\\SYSTEM\\CurrentControlSet\\Services\\*"
          AND Registry.registry_value_name="ImagePath"
          AND (Registry.registry_value_data="*\Users\*"
            OR Registry.registry_value_data="*\AppData\*"
            OR Registry.registry_value_data="*\Temp\*")
        by Registry.dest, Registry.registry_path, Registry.registry_value_data, Registry.user
     | `drop_dm_object_name(Registry)`]
```

**Defender KQL:**
```kql
DeviceProcessEvents
| where Timestamp > ago(7d)
| where AccountName !endswith "$"
| where FileName =~ "sc.exe" and ProcessCommandLine has "create"
| where ProcessCommandLine matches regex @"(?i)(\Users\|\AppData\|\ProgramData\|\Temp\)"
| project Timestamp, DeviceName, AccountName, ProcessCommandLine, InitiatingProcessFileName
```

### Article-specific behavioural hunt — Setting up SSL/TLS for Kubernetes Ingress

`UC_1807_2` · phase: **install** · confidence: **High**

**Splunk SPL (CIM):**
```spl
``` Article-specific bespoke detection — Setting up SSL/TLS for Kubernetes Ingress ```
| tstats `summariesonly` count earliest(_time) AS firstTime latest(_time) AS lastTime
    from datamodel=Endpoint.Processes
    where (Processes.process_path="*C:\Windows\System32\Drivers\Etc\Hosts*")
    by Processes.dest, Processes.user, Processes.process_name,
       Processes.process, Processes.parent_process_name, Processes.process_path
| `drop_dm_object_name(Processes)`
| `security_content_ctime(firstTime)`
| append [
| tstats `summariesonly` count
    from datamodel=Endpoint.Filesystem
    where Filesystem.action IN ("created","modified")
      AND (Filesystem.file_path="*C:\Windows\System32\Drivers\Etc\Hosts*" OR Filesystem.file_path="*/etc/hosts*")
    by Filesystem.dest, Filesystem.user, Filesystem.process_name,
       Filesystem.file_path, Filesystem.file_name
| `drop_dm_object_name(Filesystem)`
]
```

**Defender KQL:**
```kql
// Article-specific bespoke detection — Setting up SSL/TLS for Kubernetes Ingress
// Hunts the actual binaries / paths / commandline fragments named
// in the article instead of a generic technique-class template.
DeviceProcessEvents
| where Timestamp > ago(30d)
| where (FolderPath has_any ("C:\Windows\System32\Drivers\Etc\Hosts"))
| project Timestamp, DeviceName, AccountName, FileName,
          FolderPath, ProcessCommandLine,
          InitiatingProcessFileName, InitiatingProcessCommandLine
| order by Timestamp desc

// File-creation events for the named binaries / paths
DeviceFileEvents
| where Timestamp > ago(30d)
| where ActionType in ("FileCreated","FileModified")
| where (FolderPath has_any ("C:\Windows\System32\Drivers\Etc\Hosts", "/etc/hosts"))
| project Timestamp, DeviceName, AccountName, FolderPath,
          FileName, ActionType, InitiatingProcessFileName,
          InitiatingProcessCommandLine
| order by Timestamp desc
```


## Why this matters

Severity classified as **HIGH** based on: 3 use case(s) fired, 4 technique(s) inferred. Read the full article for actor attribution, tooling details, and any defanged IOCs in the body that aren't visible in the RSS summary.