How to Implement Network Types of Forensics in OMNeT++
To implement different types of network forensics in OMNeT++ has includes to emulating the numerous forensic approaches used to examine and measure the network incidents. These forensic approaches will support in understanding the nature of network activities, identifying intrusions, and preserving evidence for further analysis. Below are the steps to execute several kinds of network forensics in OMNeT++:
Step-by-Step Implementation:
- Traffic Analysis Forensics:
Traffic analysis has includes to monitoring and evaluating the network traffic to identify anomalies, identify patterns, or reconstruct activities during an incident.
Implementation Steps:
- Define the Network Environment: Generate a network with nodes like workstations, servers, routers, and a Traffic Analysis Module (TAM).
simple WorkstationModule
{
parameters:
@display(“i=block/pc”);
gates:
inout ethg;
}
simple ServerModule
{
parameters:
@display(“i=block/server”);
gates:
inout ethg;
}
simple RouterModule
{
parameters:
@display(“i=block/router”);
gates:
inout ethg;
}
simple TrafficAnalysisModule
{
parameters:
@display(“i=block/report”);
gates:
inout ethg;
}
network TrafficForensicsNetwork
{
submodules:
workstation: WorkstationModule;
server: ServerModule;
router: RouterModule;
tam: TrafficAnalysisModule;
connections:
workstation.ethg <–> router.ethg[0];
server.ethg <–> router.ethg[1];
router.ethg[2] –> tam.ethg; // Mirror traffic to the Traffic Analysis Module
}
- Implement the Traffic Analysis Logic: The Traffic Analysis Module (TAM) will capture and measure the traffic patterns, flagging any suspicious activities.
class TrafficAnalysisModule : public cSimpleModule {
protected:
virtual void handleMessage(cMessage *msg) override {
cPacket *pkt = check_and_cast<cPacket*>(msg);
// Analyze traffic pattern
analyzeTraffic(pkt);
// Forward the packet
send(pkt, “ethg$o”);
}
void analyzeTraffic(cPacket *pkt) {
EV << “Analyzing traffic: ” << pkt->getName() << endl;
// Implement traffic analysis logic here
// For example, detect high traffic volumes, unusual patterns, etc.
}
};
- Packet Capture Forensics:
Packet capture has encompasses intercepting and logging network packets to examine and evaluate their contents. This is commonly used to reconstruct activities or identify malicious payloads.
Implementation Steps:
- Implement the Packet Capture Logic: Generate a Packet Capture Module (PCM) that intercepts and logs packets as they traverse the network.
class PacketCaptureModule : public cSimpleModule {
protected:
virtual void handleMessage(cMessage *msg) override {
cPacket *pkt = check_and_cast<cPacket*>(msg);
// Capture and log the packet
logPacket(pkt);
// Forward the packet
send(pkt, “ethg$o”);
}
void logPacket(cPacket *pkt) {
EV << “Captured packet: ” << pkt->getName() << endl;
// Implement packet logging logic here
// For example, save packet contents to a file or database
}
};
- Integrate the Packet Capture Module: Incorporate the Packet Capture Module into the network to observe the traffic among nodes.
network PacketCaptureNetwork
{
submodules:
workstation: WorkstationModule;
server: ServerModule;
router: RouterModule;
pcm: PacketCaptureModule;
connections:
workstation.ethg <–> router.ethg[0];
server.ethg <–> router.ethg[1];
router.ethg[2] –> pcm.ethg; // Mirror traffic to the Packet Capture Module
}
- Intrusion Detection Forensics:
Intrusion detection has includes monitoring the network for signs of malicious activities or policy violations, like unauthorized access or malware.
Implementation Steps:
- Implement the Intrusion Detection Logic: Generate an Intrusion Detection System (IDS) module that observe network traffic and detects potential intrusions.
class IntrusionDetectionModule : public cSimpleModule {
private:
int intrusionCount = 0;
protected:
virtual void handleMessage(cMessage *msg) override {
cPacket *pkt = check_and_cast<cPacket*>(msg);
// Detect potential intrusions
if (detectIntrusion(pkt)) {
intrusionCount++;
EV << “Intrusion detected: ” << pkt->getName() << endl;
}
// Forward the packet
send(pkt, “ethg$o”);
}
bool detectIntrusion(cPacket *pkt) {
// Implement intrusion detection logic here
// For example, check for suspicious packet types or unusual traffic patterns
return false; // Example logic
}
virtual void finish() override {
recordScalar(“Intrusions Detected”, intrusionCount);
}
};
- Integrate the IDS Module: Incorporate the IDS module into the network to observe traffic among nodes.
network IDSNetwork
{
submodules:
workstation: WorkstationModule;
server: ServerModule;
router: RouterModule;
ids: IntrusionDetectionModule;
connections:
workstation.ethg <–> router.ethg[0];
server.ethg <–> router.ethg[1];
router.ethg[2] –> ids.ethg; // Mirror traffic to the IDS
}
- Event Logging Forensics:
Event logging contains to capturing and storing logs of network events, like connection attempts, errors, and system messages, for later analysis.
Implementation Steps:
- Implement the Event Logging Logic: Generate an Event Logging Module (ELM) that logs significant network events for forensic analysis.
class EventLoggingModule : public cSimpleModule {
protected:
virtual void handleMessage(cMessage *msg) override {
cPacket *pkt = check_and_cast<cPacket*>(msg);
// Log the event
logEvent(pkt);
// Forward the packet
send(pkt, “ethg$o”);
}
void logEvent(cPacket *pkt) {
EV << “Logging event for packet: ” << pkt->getName() << endl;
// Implement event logging logic here
// For example, save event details to a file or database
}
};
- Integrate the Event Logging Module: Incorporate the Event Logging Module into the network to observe and log events.
network EventLoggingNetwork
{
submodules:
workstation: WorkstationModule;
server: ServerModule;
router: RouterModule;
elm: EventLoggingModule;
connections:
workstation.ethg <–> router.ethg[0];
server.ethg <–> router.ethg[1];
router.ethg[2] –> elm.ethg; // Mirror traffic to the Event Logging Module
}
- File and Data Forensics:
File and data forensics has contained to measure the contents of files and databases to classify the tampering, unauthorized access, or other suspicious activities.
Implementation Steps:
- Implement File Integrity Checking: Generate a File Integrity Module (FIM) that validates the integrity of files by checking hashes or signatures.
class FileIntegrityModule : public cSimpleModule {
protected:
virtual void handleMessage(cMessage *msg) override {
cPacket *pkt = check_and_cast<cPacket*>(msg);
// Check file integrity
if (!verifyFileIntegrity(pkt)) {
EV << “File integrity check failed for packet: ” << pkt->getName() << endl;
}
// Forward the packet
send(pkt, “ethg$o”);
}
bool verifyFileIntegrity(cPacket *pkt) {
// Implement file integrity verification logic here
// For example, compare file hashes or signatures
return true; // Example logic
}
};
- Integrate the File Integrity Module: Integrate the File Integrity Module into the network to prove the integrity of files and information.
network FileIntegrityNetwork
{
submodules:
workstation: WorkstationModule;
server: ServerModule;
router: RouterModule;
fim: FileIntegrityModule;
connections:
workstation.ethg <–> router.ethg[0];
server.ethg <–> router.ethg[1];
router.ethg[2] –> fim.ethg; // Mirror traffic to the File Integrity Module
}
From the demonstration we had learned how effectively it executes the several kinds of forensics in the network using the OMNeT++ tool. If you had any doubts about network forensics we will support and provide that too