YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_LOG_EXPL_Citrix_Netscaler_ADC_Exploitation_Attempt_CVE_2023_3519_Jul23_1
This YARA rule detects forensic artifacts that appear following an attempted exploitation of Citrix NetScaler ADC CVE-2023-3519. The rule identifies an attempt to access the vulnerable function using an overly long URL, a potential sign of attempted exploitation. However, it does not confirm whether such an attempt was successful.
- Auteur
- Florian Roth
- Date
- 2023-07-27
- Modifiée
- 2023-12-05
- Score / Qualité
- 65 / 85
Ce que détecte cette règle
This YARA rule detects forensic artifacts that appear following an attempted exploitation of Citrix NetScaler ADC CVE-2023-3519. The rule identifies an attempt to access the vulnerable function using an overly long URL, a potential sign of attempted exploitation. However, it does not confirm whether such an attempt was successful.
Elle définit 2 motifs (1 texte, 0 hex, 1 regex).
Résumé généré à partir des métadonnées et de la condition de la règle.
Source de la règle
rule SIGNATURE_BASE_LOG_EXPL_Citrix_Netscaler_ADC_Exploitation_Attempt_CVE_2023_3519_Jul23_1 : CVE_2023_3519
{
meta:
= "This YARA rule detects forensic artifacts that appear following an attempted exploitation of Citrix NetScaler ADC CVE-2023-3519. The rule identifies an attempt to access the vulnerable function using an overly long URL, a potential sign of attempted exploitation. However, it does not confirm whether such an attempt was successful."
= "Florian Roth"
= "7dfe4130-d976-5d6d-a05d-ccadefe45406"
= "2023-07-27"
= "2023-12-05"
= "https://blog.assetnote.io/2023/07/24/citrix-rce-part-2-cve-2023-3519/"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/expl_citrix_netscaler_adc_exploitation_cve_2023_3519.yar#L63-L77"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "7ad3164c5b2616b12a513a2bb3736d530769e75fca03346a72351a27b8343b2a"
= 65
= 85
= "CVE-2023-3519"
strings:
$sr1 = /GWTEST FORMS SSO: Parse=0; URLLEN=([2-9][0-9]{2}|[0-9]{4,20}); Event: start=0x/
$s1 = ", type=1; Target: start=0x"
condition:
all of them
}
Chaînes (2 motifs)
| Identifiant | Type | Valeur | Modificateurs |
|---|---|---|---|
| $sr1 | regex | /GWTEST FORMS SSO: Parse=0; URLLEN=([2-9][0-9]{2}|[0-9]{4,20}); Event: start=0x/ | |
| $s1 | texte | ", type=1; Target: start=0x" |
Condition
all of themEn clair (Heuristique)
- Tous les motifs de la règle doivent être trouvés.
Tester cette règle dans votre navigateur
Déposez un fichier pour le scanner avec cette règle grâce à YARA-X compilé en WebAssembly. Rien n’est envoyé.
Licence et attribution
Auteur : Florian Roth
Dépôt source : Signature Base (Florian Roth / Nextron) @ 94a1c48d7a
Licence : Detection Rule License 1.1 (licence du dépôt)
Reprise via YARA Forge 20260927, qui préfixe les noms de règles par la source et ajoute des champs meta normalisés.
Identifiant de règle: 7dfe4130-d976-5d6d-a05d-ccadefe45406
Tags:CVE_2023_3519
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