YARA · Malpedia signator rules
MALPEDIA_Win_Formbook_Auto
autogenerated rule brought to you by yara-signator
- Autor
- Felix Bilstein - yara-signator at cocacoding dot com
- Fecha
- 2026-05-04
- Modificada
- 2026-05-18
- Puntuación / Calidad
- 75 / 75
Qué detecta esta regla
autogenerated rule brought to you by yara-signator
Familia de malware asociada: Formbook.
Define 10 patrones (0 de texto, 10 hex, 0 regex).
Resumen generado a partir de los metadatos y la condición de la regla.
Código de la regla
rule MALPEDIA_Win_Formbook_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "81889d2e-08ce-5dbd-bb7f-c541d6e4e642"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.formbook"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.formbook_auto.yar#L1-L125"
= "N/A"
= "4b6cf3ac0bb4cedf394d7a457c0e7108ea8a44fd4176cd32ba35519f56569548"
= 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 = { 8bec 8b450c 85c0 7504 33c0 5d c3 }
$sequence_1 = { 51 57 8996e4020000 c70318000000 c786d00200001a000000 e8???????? }
$sequence_2 = { 3a040e 7510 47 41 }
$sequence_3 = { 8b7508 8b465c 57 c644301c80 bf01000000 017e5c }
$sequence_4 = { 51 52 e8???????? 83c448 8d4590 50 83c3fe }
$sequence_5 = { 33c0 68fe030000 50 8d8d02fcffff }
$sequence_6 = { 3b450c 7290 5b 5f 5e 8be5 }
$sequence_7 = { 52 e8???????? 83c40c 85c0 7510 47 83c318 }
$sequence_8 = { 894df8 e8???????? 830702 83c40c 830603 8b06 8a4c1801 }
$sequence_9 = { 83c408 50 e8???????? 83c410 85c0 7523 8d8de4fdffff }
condition:
7 of them and filesize < 371712
}
Cadenas (10 patrones)
| Identificador | Tipo | Valor | Modificadores |
|---|---|---|---|
| $sequence_0 | hex | { 8bec 8b450c 85c0 7504 33c0 5d c3 } | |
| $sequence_1 | hex | { 51 57 8996e4020000 c70318000000 c786d00200001a000000 e8???????? } | |
| $sequence_2 | hex | { 3a040e 7510 47 41 } | |
| $sequence_3 | hex | { 8b7508 8b465c 57 c644301c80 bf01000000 017e5c } | |
| $sequence_4 | hex | { 51 52 e8???????? 83c448 8d4590 50 83c3fe } | |
| $sequence_5 | hex | { 33c0 68fe030000 50 8d8d02fcffff } | |
| $sequence_6 | hex | { 3b450c 7290 5b 5f 5e 8be5 } | |
| $sequence_7 | hex | { 52 e8???????? 83c40c 85c0 7510 47 83c318 } | |
| $sequence_8 | hex | { 894df8 e8???????? 830702 83c40c 830603 8b06 8a4c1801 } | |
| $sequence_9 | hex | { 83c408 50 e8???????? 83c410 85c0 7523 8d8de4fdffff } |
Condición
7 of them and filesize < 371712En palabras sencillas (Heurística)
- El archivo debe ocupar menos de 371712 (un límite barato que descarta archivos grandes).
- Deben coincidir al menos 7 patrones de la regla.
Prueba esta regla en tu navegador
Arrastra un archivo para escanearlo con esta regla usando YARA-X compilado a WebAssembly. No se sube nada.
Licencia y atribución
Autor: Felix Bilstein - yara-signator at cocacoding dot com
Repositorio de origen: Malpedia signator rules @ c901f97b7d
Licencia: Creative Commons Attribution-ShareAlike 4.0 (licencia del repositorio)
Obtenida a través de YARA Forge 20260927, que añade a los nombres el prefijo de la fuente y campos meta normalizados.
Id de la regla: 81889d2e-08ce-5dbd-bb7f-c541d6e4e642
Metadatos
| 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 |
Etiquetas:FILE
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