During an active incident response scenario at Permalink Software, the SOC team noticed an unusual spike in traffic from one of their endpoints that was communicating with a known malicious IP address. This activity was flagged by the network intrusion detection system (NIDS) and correlated with other indicators of compromise found in threat intelligence feeds. Your task is to use your knowledge of the MITRE ATT&CK framework and TTPs to help guide the team through identifying and reconstructing the attack kill chain. By doing so, the SOC can better understand the nature of the compromise and formulate a response plan.

Link : https://cyberhaze.io/challange-details/6a02fcc0a677aef98ea51234

Incident Response Case Study Using MITRE ATT&CK

Overview

During an incident response engagement at Permalink Software, the Security Operations Center (SOC) identified suspicious network activity originating from an internal endpoint communicating with a known malicious IP address.

The activity was initially detected through the organization's Network Intrusion Detection System (NIDS) and later correlated with multiple Indicators of Compromise (IOCs) obtained from threat intelligence feeds.

Further investigation revealed that the incident was not an isolated event but rather a complete attack lifecycle involving reconnaissance, exploitation, privilege escalation, persistence, defense evasion, data collection, exfiltration, and ultimately website defacement.

This report reconstructs the attack using the MITRE ATT&CK framework to better understand the adversary's behavior and tactics.

Executive Summary

The attacker conducted external reconnaissance against the organization using vulnerability scanning techniques. After identifying a vulnerable public-facing application, a SQL Injection vulnerability was exploited using SQLmap.

The compromise enabled remote command execution through a Windows Command Shell, followed by privilege escalation via token impersonation abuse.

To maintain long-term access, the adversary modified an existing Windows service. Security controls were then disabled, including the organization's EDR solution.

After collecting sensitive information using malicious tooling, the attacker exfiltrated data to a public GitHub repository and concluded the operation by defacing the company's public website.

Attack Timeline

Stage	MITRE ATT&CK ID	Description
Reconnaissance	T1595.002	Vulnerability Scanning
Initial Access	T1190	Exploit Public-Facing Application
Execution	T1059.003	Windows Command Shell
Privilege Escalation	T1134	Access Token Manipulation
Persistence	T1543.003	Windows Service
Defense Evasion	T1562.001	Disable or Modify Security Tools
Collection	TA0009	Data Collection
Exfiltration	TA0010	Exfiltration via GitHub
Impact	T1491.002	External Defacement

Detailed Attack Analysis

1. Reconnaissance

The attack began with active reconnaissance against internet-facing assets belonging to Permalink Software.

Network logs revealed the following User-Agent:

Mozilla/5.0 (compatible; Nmap Scripting Engine;)

This indicator strongly suggests the use of Nmap Scripting Engine (NSE) to identify exposed services and discover exploitable vulnerabilities.

MITRE Mapping

Tactic: Reconnaissance
Technique: Active Scanning
Sub-technique: T1595.002 – Vulnerability Scanning

Detection Opportunities

Monitor abnormal scanning behavior.
Detect repeated connections targeting multiple ports.
Alert on known scanner User-Agent strings.

2. Initial Access

Following reconnaissance, the adversary identified a vulnerable web application exposed to the internet.

Investigation confirmed exploitation of a SQL Injection vulnerability that allowed the attacker to execute commands on the underlying server.

The attacker utilized SQLmap to automate the exploitation process.

MITRE Mapping

Technique: T1190 – Exploit Public-Facing Application

Tool Used

SQLmap (MITRE Software ID: S0225)

Detection Opportunities

Monitor suspicious SQL queries.
Detect SQL Injection patterns within web logs.
Implement Web Application Firewalls (WAF).

3. Execution

Once access was obtained, the attacker achieved remote code execution and launched a reverse shell.

Evidence showed the creation of a:

cmd.exe

process to facilitate command execution.

MITRE Mapping

Technique: T1059.003 – Windows Command Shell

Detection Opportunities

Monitor suspicious child processes spawned from web servers.
Detect command shell execution initiated by web applications.

4. Privilege Escalation

After gaining an initial foothold, the attacker elevated privileges by abusing the Windows:

SeImpersonatePrivilege

permission.

This enabled impersonation of an administrator access token without requiring valid credentials.

One important API call associated with this behavior is:

ImpersonateLoggedOnUser

MITRE Mapping

Technique: T1134 – Access Token Manipulation

Detection Opportunities

Monitor token manipulation events.
Alert on unusual privilege assignment.
Track calls to impersonation-related APIs.

5. Persistence

To ensure continued access after reboot or service restart, the attacker modified an existing Windows service.

The service ImagePath was changed to point to the attacker's reverse shell payload.

As a result, the malicious payload would automatically execute whenever the service started.

MITRE Mapping

Sub-technique: T1543.003 – Windows Service

Detection Opportunities

Monitor service creation and modification events.
Audit changes to service registry entries.

6. Defense Evasion

The attacker disabled the organization's Endpoint Detection and Response (EDR) solution.

This action reduced visibility and hindered detection efforts.

MITRE Mapping

Sub-technique: T1562.001 – Disable or Modify Security Tools

Detection Opportunities

Alert when security software is stopped.
Monitor tampering with EDR configurations.
Detect unauthorized service termination events.

7. Collection

After establishing persistence and disabling defenses, the attacker began gathering sensitive information.

A tool identified as:

ccf32

was transferred to the compromised host and used to collect valuable organizational data.

MITRE Mapping

Tactic: TA0009 – Collection

Detection Opportunities

Monitor unexpected file access activity.
Detect execution of unknown collection utilities.
Track large-scale file enumeration behavior.

8. Exfiltration

Once data had been staged, the attacker transferred the collected information to a public GitHub repository.

Using trusted cloud services for exfiltration is a common technique because such traffic often bypasses traditional security controls.

MITRE Mapping

Tactic: Exfiltration

Recommended Mitigation

M1021 – Restrict Web-Based Content

Detection Opportunities

Monitor outbound connections to cloud storage platforms.
Detect abnormal upload volumes.
Implement Data Loss Prevention (DLP) controls.

9. Impact

The final stage of the attack involved modification of the organization's public website.

Visitors were presented with unauthorized propaganda messages, indicating successful website defacement.

MITRE Mapping

Sub-technique: T1491.002 – External Defacement

Detection Opportunities

File integrity monitoring.
Website content validation.
Continuous monitoring of public-facing assets.

MITRE ATT&CK Attack Flow

T1595.002
Vulnerability Scanning
        │
        ▼
T1190
Exploit Public-Facing Application
(SQL Injection)
        │
        ▼
S0225
SQLmap
        │
        ▼
T1059.003
Windows Command Shell
        │
        ▼
T1134
Access Token Manipulation
        │
        ▼
T1543.003
Windows Service
        │
        ▼
T1562.001
Disable Security Tools
        │
        ▼
TA0009
Collection
        │
        ▼
GitHub Exfiltration
        │
        ▼
T1491.002
External Defacement

Key Lessons Learned

External-facing applications remain one of the most common initial access vectors.
SQL Injection vulnerabilities can rapidly lead to full system compromise.
Service modification remains a common persistence technique.
Security tool tampering should always generate high-priority alerts.
Cloud platforms such as GitHub can be abused for data exfiltration.
Effective detection requires correlating network, endpoint, and threat intelligence data.

Conclusion

This incident demonstrates a complete adversary attack lifecycle mapped to the MITRE ATT&CK framework. Beginning with vulnerability scanning and ending with website defacement, the attacker successfully moved through multiple phases of the intrusion kill chain.

The case highlights the importance of layered defenses, continuous monitoring, threat intelligence correlation, and proactive detection engineering to identify and contain sophisticated attacks before significant damage occurs.