YARA · Malpedia signator rules
MALPEDIA_Win_Cutwail_Auto
autogenerated rule brought to you by yara-signator
- Auteur
- Felix Bilstein - yara-signator at cocacoding dot com
- Date
- 2026-05-04
- Modifiée
- 2026-05-18
- Score / Qualité
- 75 / 75
Ce que détecte cette règle
autogenerated rule brought to you by yara-signator
Famille de malware associée : Cutwail.
Elle définit 16 motifs (0 texte, 16 hex, 0 regex).
Résumé généré à partir des métadonnées et de la condition de la règle.
Source de la règle
rule MALPEDIA_Win_Cutwail_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "eea8ff8c-659d-53c6-ba40-7e6c1cb830a4"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.cutwail"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.cutwail_auto.yar#L1-L164"
= "N/A"
= "64a1d594a214511f18b2a6e40609e44221969e5f0d57684c53fed96318491e02"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { 6a01 6a19 8b85e8fdffff 8b0c8500f62004 51 e8???????? }
$sequence_1 = { 7d04 32c0 eb7d c745fc00000000 837d1000 }
$sequence_2 = { 5e 5b c20800 837c24140c 752f }
$sequence_3 = { 6a38 8d4dae 8d7c031c e8???????? 83c004 }
$sequence_4 = { 894500 8bc2 c1e808 23c6 }
$sequence_5 = { 52 e8???????? 83c408 6a0c e8???????? 83c404 }
$sequence_6 = { 837d0800 745e 837d0c00 7458 c745f800000000 eb09 }
$sequence_7 = { 81ec28020000 c745fc00000000 c745f803000000 c785f4fdffff00000000 eb0f 8b85f4fdffff 83c001 }
$sequence_8 = { 83c41c 3bfb 751d 68ca000000 }
$sequence_9 = { 8b5508 52 e8???????? 8945f8 837d1800 }
$sequence_10 = { 8b08 83c41c ff75e0 6848ec6814 }
$sequence_11 = { 33f6 897524 897538 c6455d00 e9???????? }
$sequence_12 = { 8945fc 8b4dfc 833900 0f84ba000000 c745f000000000 817df096000000 0f87a6000000 }
$sequence_13 = { c3 57 8b7810 53 }
$sequence_14 = { 8b4df8 3b4d0c 7d2e 8d55f0 52 }
$sequence_15 = { c3 50 ffd6 ff35???????? }
condition:
7 of them and filesize < 262144
}
Chaînes (16 motifs)
| Identifiant | Type | Valeur | Modificateurs |
|---|---|---|---|
| $sequence_0 | hex | { 6a01 6a19 8b85e8fdffff 8b0c8500f62004 51 e8???????? } | |
| $sequence_1 | hex | { 7d04 32c0 eb7d c745fc00000000 837d1000 } | |
| $sequence_2 | hex | { 5e 5b c20800 837c24140c 752f } | |
| $sequence_3 | hex | { 6a38 8d4dae 8d7c031c e8???????? 83c004 } | |
| $sequence_4 | hex | { 894500 8bc2 c1e808 23c6 } | |
| $sequence_5 | hex | { 52 e8???????? 83c408 6a0c e8???????? 83c404 } | |
| $sequence_6 | hex | { 837d0800 745e 837d0c00 7458 c745f800000000 eb09 } | |
| $sequence_7 | hex | { 81ec28020000 c745fc00000000 c745f803000000 c785f4fdffff00000000 eb0f 8b85f4fdffff 83c001 } | |
| $sequence_8 | hex | { 83c41c 3bfb 751d 68ca000000 } | |
| $sequence_9 | hex | { 8b5508 52 e8???????? 8945f8 837d1800 } | |
| $sequence_10 | hex | { 8b08 83c41c ff75e0 6848ec6814 } | |
| $sequence_11 | hex | { 33f6 897524 897538 c6455d00 e9???????? } | |
| $sequence_12 | hex | { 8945fc 8b4dfc 833900 0f84ba000000 c745f000000000 817df096000000 0f87a6000000 } | |
| $sequence_13 | hex | { c3 57 8b7810 53 } | |
| $sequence_14 | hex | { 8b4df8 3b4d0c 7d2e 8d55f0 52 } | |
| $sequence_15 | hex | { c3 50 ffd6 ff35???????? } |
Condition
7 of them and filesize < 262144En clair (Heuristique)
- Le fichier doit faire moins de 262144 (garde-fou peu coûteux qui écarte les gros fichiers).
- Au moins 7 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 : Felix Bilstein - yara-signator at cocacoding dot com
Dépôt source : Malpedia signator rules @ c901f97b7d
Licence : Creative Commons Attribution-ShareAlike 4.0 (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: eea8ff8c-659d-53c6-ba40-7e6c1cb830a4
Métadonnées
| version | 1 |
|---|---|
| tool | yara-signator v0.6.0 |
| signator_config | callsandjumps;datarefs;binvalue |
| malpedia_rule_date | 20260422 |
| malpedia_hash | a182e35da64e6d71cb55f125c4d4225196523f14 |
| malpedia_version | 20260504 |
| malpedia_license | CC BY-SA 4.0 |
| malpedia_sharing | TLP:WHITE |
Tags:FILE
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