When we first look at the requested URL in the investigation channel , we can see that "script" and "alert" js code was added to the request , so we can see that an attempt for an XSS attack was made.
Then , we want to check whether the source ip adress is malicious or not by using VirusTotal or AbuseIPDB. After checking the source ip adress , we can see the ip adress belongs to an internet provider service in China and marked as malicious on boh sites. After that, we check the destination ip adress on the same sites and see that the ip adress belongs to a company network , so we can say that the traffic was from internet to company network.
Then , we go to the "Log Management" section to see if we can see any logs from the source ip adress and when we check , there are 8 requests that were made at the time of event to the same destination ip adress and even though the http response status was "200" for 7 of these requests , the last request's status code was "302" so we can see that the attack was unsuccessful.
Later on , we check the "Email Security" section and see there isnt any planned tests. We go to the "Endpoint Security" section to contain the " WebServer1002" server to prevent any further damage.
Intelligence View
⚡ tsecurity.de Intelligence
Let'sDefend SOC166 - Javascript Code Detected in Requested URL Investigation Wlakthrough
When we first look at the requested URL in the investigation channel , we can see that "script" and "alert" js code was added to the request , so we can see that an attempt for an XSS attack was made. Then , we want to check whether the…
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title: Detect Exploitation - Let'sDefend SOC166 - Javascript Code Detected in Requested URL Investigation Wlakthrough
id: f226b0fd-5f5c-43bb-aaac-f7914c8a9531
status: experimental
description: Automatisch generierte SIEM-Erkennungsregel basierend auf CTI Intelligence
references:
- https://tsecurity.de/
author: iShareStuff CTI Automated Detection Engine
date: 2026-09-26
logsource:
category: network_connection
product: any
detection:
selection:
CommandLine|contains:
- 'exploit'
condition: selection
falsepositives:
- Legitime administrative Zugriffe oder Penetrationstests
level: high
tags:
- attack.initial_accessSyntax validiert (0 Fehler)
rule CTI_Threat_Indicator {
meta:
author = "iShareStuff CTI Automated Detection Engine"
date = "2026-09-26"
description = "YARA Signature for "
strings:
$str = "Let\'sDefend SOC166 - Javascrip" ascii wide
condition:
any of them
}Syntax validiert (0 Fehler)
index=security sourcetype IN ("cisco:asa", "pan:traffic", "zeek_conn", "suricata", "WinEventLog:Security")
("LetsDefend SOC166 - Javascript Code Dete")
| stats count earliest(_time) as first_seen latest(_time) as last_seen by src_ip, dest_ip, dest_host, signature
| eval first_seen=strftime(first_seen, "%Y-%m-%d %H:%M:%S"), last_seen=strftime(last_seen, "%Y-%m-%d %H:%M:%S")
| sort - countSyntax validiert (0 Fehler)
message: "*LetsDefend SOC166 - Javascript Code Dete*"Syntax validiert (0 Fehler)
CommonSecurityLog
| where Message has "LetsDefend SOC166 - Javascript Code Dete"
| summarize EventCount = count(), FirstSeen = min(TimeGenerated), LastSeen = max(TimeGenerated) by SourceIP, DestinationIP, DestinationPort, Activity
| extend DetectionRule = "iShareStuff-CTI-Compiled"
| sort by EventCount desc2. Cyber Threat Intelligence & Forensik
CTI Threat Relationship Graph2 Knoten / 1 Relationen
🎯
MITRE ATT&CK Matrix Navigator 14 Taktiken
Reconnaissance
-
Resource Development
-
Initial Access
Execution
Persistence
-
Privilege Escalation
Defense Evasion
Credential Access
-
Discovery
-
Lateral Movement
-
Collection
-
Command and Control
Exfiltration
-
Impact
tsecurity.de Cognitive Threat RAG
Fokus-Vektor:
Kognitive Analyse für identifizierte Bedrohung: Erhöhte Bedrohungslage im Bereich Let'sDefend SOC166 - Javascript Code Det.... Basierend auf 368k Vektor-Korrelationen werden sofortige Isolationsmaßnahmen für betroffene Endpunkte empfohlen.
🛡️ Angriffsfläche & Exposure
Netzwerk/Remote-Zugriff ohne Vorauthentifizierung möglich.
⚡ Empfohlene Sofortmaßnahmen
- 1. Perimeter-Inspektion: Relevante Portfreigaben und exponierte Endpunkte unverzüglich scannen.
- 2. Patch-Applikation: Hersteller-Hotfix einspielen oder betroffene Daemons in isolierte DMZ-Segmente überführen.
- 3. Telemetrie & EDR-Alerts: Prozessaufrufe und Child-Processes auf anomale Shell-Spawns überwachen.
🔗 Semantisch verwandte Zero-Days
MariaDB 11.7 VEC
Synthetische RAG-Antwort