{"id":133,"date":"2026-09-13T20:56:45","date_gmt":"2026-09-13T20:56:45","guid":{"rendered":"https:\/\/neranis.com\/?post_type=nrn_service&#038;p=133"},"modified":"2026-09-13T20:56:45","modified_gmt":"2026-09-13T20:56:45","slug":"recherche-proactive-de-compromissions-et-de-menaces","status":"publish","type":"nrn_service","link":"https:\/\/neranis.com\/fr\/services\/proactive-compromise-investigation-threat-hunting\/","title":{"rendered":"Investigation proactive des compromissions \u2014 recherche de menaces"},"content":{"rendered":"<section class=\"wp-block-group nrn2-section nrn2-page-hero is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-breadcrumb wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/\">Accueil<\/a> <span aria-hidden=\"true\">\/<\/span> <a href=\"https:\/\/neranis.com\/fr\/expertise\/\">Expertise<\/a> \/ <a href=\"https:\/\/neranis.com\/fr\/expertise\/operations-de-securite\/\">Op\u00e9rations de s\u00e9curit\u00e9<\/a><\/p>\n\n\n<div class=\"wp-block-group nrn2-service-top nrn2-hero-layout-r3 is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-hero-split-copy is-layout-flow wp-block-group-is-layout-flow\">\n\n<p class=\"nrn2-kicker wp-block-paragraph\">SOC \/ SOC-06<\/p>\n\n\n<h1 class=\"wp-block-heading nrn2-title\">Investigation proactive des compromissions \u2014 recherche de menaces<\/h1>\n\n\n<p class=\"nrn2-lead wp-block-paragraph\">Rechercher des comportements suspects \u00e0 l'aide d'hypoth\u00e8ses explicites au-del\u00e0 des alertes existantes. Le threat hunting couvre un p\u00e9rim\u00e8tre et une p\u00e9riode d\u00e9finis ; il peut ne trouver aucune preuve, mais ne peut pas prouver l'absence absolue de compromission.<\/p>\n\n<\/div>\n\n\n<figure class=\"wp-block-image size-full nrn2-context-image nrn2-visual-asset-service-family-soc\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"500\" src=\"https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-soc.webp\" alt=\"\" class=\"wp-image-251\" srcset=\"https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-soc.webp 1600w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-soc-300x94.webp 300w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-soc-1024x320.webp 1024w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-soc-768x240.webp 768w, https:\/\/neranis.com\/wp-content\/uploads\/2026\/09\/service-family-soc-1536x480.webp 1536w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n<\/div>\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-top is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-intro is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">QUAND C'EST UTILE<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Une r\u00e9ponse cibl\u00e9e<br>\u00e0 un besoin d\u00e9fini.<\/h2>\n\n\n<p class=\"nrn2-body-lg wp-block-paragraph\">Faible mais persistant soup\u00e7on, exposition \u00e0 une menace sectorielle, t\u00e9l\u00e9m\u00e9trie nouvellement disponible ou d\u00e9sir de tester la visibilit\u00e9 du SOC sur certains comportements.<\/p>\n\n\n<div class=\"wp-block-buttons nrn2-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/neranis.com\/fr\/contact\/\">Discutez de ce service<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-facts is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">EN UN COUP D'\u0152IL<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Famille<\/strong><br><a href=\"https:\/\/neranis.com\/fr\/expertise\/operations-de-securite\/\">Op\u00e9rations de s\u00e9curit\u00e9<\/a><\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>Engagement<\/strong><br>Service ou mise en \u0153uvre<\/p>\n\n\n<p class=\"wp-block-paragraph\"><strong>R\u00e9f\u00e9rence<\/strong><br>SOC-06<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section nrn2-canvas is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">PORT\u00c9E ET R\u00c9SULTATS<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Ce que couvre la mission.<\/h2>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-delivery-card is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Port\u00e9e<\/h3>\n\n\n<ul class=\"wp-block-list nrn2-list\">\n<li>Hypoth\u00e8ses<\/li>\n\n\n<li>sources et p\u00e9riode temporelle<\/li>\n\n\n<li>recherches<\/li>\n\n\n<li>enrichissement<\/li>\n\n\n<li>validation<\/li>\n\n\n<li>coordination des incidents si des preuves sont trouv\u00e9es<\/li>\n\n\n<li>recommandations<\/li>\n\n\n<li>conversion de chasses utiles en d\u00e9tections<\/li>\n\n<\/ul>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-card is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Livrables<\/h3>\n\n\n<ul class=\"wp-block-list nrn2-list\">\n<li>Plan de chasse<\/li>\n\n\n<li>journal d'enqu\u00eate<\/li>\n\n\n<li>r\u00e9sultats valid\u00e9s<\/li>\n\n\n<li>limitations des donn\u00e9es<\/li>\n\n\n<li>indicateurs pertinents<\/li>\n\n\n<li>recommandations<\/li>\n\n\n<li>nouvelles d\u00e9tections propos\u00e9es<\/li>\n\n<\/ul>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-delivery-card nrn2-evidence is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Preuve de r\u00e9ception<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Les hypoth\u00e8ses sont trait\u00e9es de mani\u00e8re tra\u00e7able ; les conclusions sont reli\u00e9es aux preuves ; les lacunes dans les donn\u00e9es sont explicites ; les anomalies suivent le processus d'escalade convenu ; les am\u00e9liorations sont attribu\u00e9es.<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">LIVRAISON<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Comment le travail est structur\u00e9.<\/h2>\n\n<\/div>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-two-col is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-prose is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Approche<\/h3>\n\n\n<p class=\"wp-block-paragraph\">D\u00e9finir le p\u00e9rim\u00e8tre du service et des r\u00f4les ; connecter et valider les donn\u00e9es ; tester les sc\u00e9narios ; d\u00e9marrer les op\u00e9rations ; mesurer et am\u00e9liorer.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Pr\u00e9requis et responsabilit\u00e9s<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Client : actifs, journaux, contacts et autorit\u00e9 de r\u00e9ponse. Fournisseur : collecte\/analyse selon le contrat. Les d\u00e9cisions op\u00e9rationnelles et la reprise sont explicitement attribu\u00e9es.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-prose is-layout-flow wp-block-group-is-layout-flow\">\n<h3 class=\"wp-block-heading\">Facteurs de port\u00e9e<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Actifs, sources, \u00e9v\u00e9nements, volume, r\u00e9tention, int\u00e9grations, heures et niveau de r\u00e9ponse. Int\u00e9gration, licences, consommation et service r\u00e9current s\u00e9par\u00e9s.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Questions \u00e0 clarifier<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Quelle hypoth\u00e8se est examin\u00e9e ? Combien de donn\u00e9es historiques existent ? Qui peut autoriser une enqu\u00eate plus approfondie si des preuves suspectes apparaissent ?<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section nrn2-compact is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-boundaries is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">LIMITES IMPORTANTES<\/p>\n\n\n<p class=\"nrn2-body-lg wp-block-paragraph\">Sans t\u00e9l\u00e9m\u00e9trie ou historique suffisants, certaines hypoth\u00e8ses restent v\u00e9rifiables. La chasse ne rel\u00e8ve ni de la surveillance continue ni d'un audit complet du syst\u00e8me.<\/p>\n\n\n<p class=\"wp-block-paragraph\">Heures et temps de r\u00e9ponse uniquement apr\u00e8s approbation contractuelle. Aucun taux de d\u00e9tection ni de r\u00e9solution garanti ; les lacunes de collecte et les sources d\u00e9faillantes restent visibles dans les rapports.<\/p>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">EN PRATIQUE<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Situations illustratives.<\/h2>\n\n<\/div>\n\n\n<p class=\"nrn2-section-lead wp-block-paragraph\">Ces exemples d\u00e9crivent des engagements possibles et des r\u00e9sultats cibles. Il ne s'agit pas de r\u00e9f\u00e9rences clients ni de r\u00e9sultats obtenus.<\/p>\n\n<\/div>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Sc\u00e9nario 01<\/summary>\n<p class=\"wp-block-paragraph\">Une entreprise est pr\u00e9occup\u00e9e apr\u00e8s une alerte de partenaire. Projet : rechercher dans les journaux disponibles les comportements et acc\u00e8s pertinents. R\u00e9sultat vis\u00e9 : une conclusion factuelle pour la p\u00e9riode examin\u00e9e, sans affirmer qu'aucune intrusion n'a jamais eu lieu.<\/p>\n\n<\/details>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Sc\u00e9nario 02<\/summary>\n<p class=\"wp-block-paragraph\">Un SOC soup\u00e7onne une utilisation anormale d'un compte de service. Projet : comparer l'activit\u00e9, les destinations et le calendrier avec les propri\u00e9taires. R\u00e9sultat vis\u00e9 : s\u00e9parer les pratiques l\u00e9gitimes des anomalies ; les cas suspects d\u00e9clenchent une enqu\u00eate s\u00e9par\u00e9e.<\/p>\n\n<\/details>\n\n\n<details class=\"wp-block-details nrn2-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Contexte technologique et de r\u00e9f\u00e9rence<\/summary>\n<p class=\"wp-block-paragraph\">R\u00e9f\u00e9rences : MITRE ATT&amp;CK et donn\u00e9es SIEM\/EDR\/identit\u00e9 autoris\u00e9es ; outils s\u00e9lectionn\u00e9s en fonction de l'hypoth\u00e8se et des preuves disponibles.<\/p>\n\n\n<p class=\"wp-block-paragraph\">L'ensemble final des technologies est convenu lors du cadrage, sur la base de l'interop\u00e9rabilit\u00e9, des licences, des droits d'acc\u00e8s et des exigences op\u00e9rationnelles.<\/p>\n\n<\/details>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-section-heading is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">SERVICES CONNECT\u00c9S<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Construisez l'\u00e9tape suivante.<\/h2>\n\n<\/div>\n\n\n<p class=\"nrn2-section-lead wp-block-paragraph\">Ces services peuvent compl\u00e9ter la mission. Ils ne sont pas inclus automatiquement.<\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-related-grid is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">SOC-04<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/ingenierie-de-detection-et-amelioration-des-regles\/\">Ing\u00e9nierie de la d\u00e9tection et am\u00e9lioration des r\u00e8gles<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">Concevoir et maintenir des r\u00e8gles de d\u00e9tection li\u00e9es aux risques clients, avec des proc\u00e9dures de test et d'investigation. L'objectif est d'obtenir des alertes utiles et explicables plut\u00f4t qu'un catalogue incontr\u00f4l\u00e9 de r\u00e8gles activ\u00e9es.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/ingenierie-de-detection-et-amelioration-des-regles\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">RES-02<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/contrat-de-preparation-et-dassistance-en-cas-dincident\/\">Contrat d'assistance et de pr\u00e9paration \u00e0 la r\u00e9ponse aux incidents<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">Pr\u00e9parer les contacts, les autorisations, les acc\u00e8s et les proc\u00e9dures avant un incident pour \u00e9viter les retards lors de l'activation. Un contrat de services (retainer) pr\u00e9cise les conditions d'assistance ; il ne doit pas \u00eatre vendu comme une intervention garantie sans engagement formel.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/contrat-de-preparation-et-dassistance-en-cas-dincident\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n\n<div class=\"wp-block-group nrn2-service-card is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-ref wp-block-paragraph\">PEN-09<\/p>\n\n\n<h3 class=\"wp-block-heading\"><a href=\"https:\/\/neranis.com\/fr\/services\/red-teaming-violet-et-validation-des-controles\/\">Purple teaming et validation des contr\u00f4les<\/a><\/h3>\n\n\n<p class=\"nrn2-card-desc wp-block-paragraph\">Travail conjoint entre testeurs et d\u00e9fenseurs pour v\u00e9rifier que le comportement malveillant simul\u00e9 produit les signaux et les r\u00e9ponses attendus.<\/p>\n\n\n<p class=\"nrn2-text-link wp-block-paragraph\"><a href=\"https:\/\/neranis.com\/fr\/services\/red-teaming-violet-et-validation-des-controles\/\">D\u00e9couvrir ce service <span aria-hidden=\"true\">\u2197<\/span><\/a><\/p>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>\n\n\n<section class=\"wp-block-group nrn2-section is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-wrap is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group nrn2-cta is-layout-flow wp-block-group-is-layout-flow\">\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-kicker wp-block-paragraph\">Commencer une conversation<\/p>\n\n\n<h2 class=\"wp-block-heading nrn2-h2\">Clarifiez la port\u00e9e.<\/h2>\n\n<\/div>\n\n\n<div class=\"wp-block-group is-layout-flow wp-block-group-is-layout-flow\">\n<p class=\"nrn2-body-lg wp-block-paragraph\">Nous clarifierons l'objectif, les d\u00e9pendances et les responsabilit\u00e9s de ce service avant de proposer la livraison.<\/p>\n\n\n<div class=\"wp-block-buttons nrn2-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/neranis.com\/fr\/contact\/\">Discutez de vos priorit\u00e9s<\/a><\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/div>\n\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Rechercher des comportements suspects \u00e0 l'aide d'hypoth\u00e8ses explicites au-del\u00e0 des alertes existantes. Le threat hunting couvre un p\u00e9rim\u00e8tre et une p\u00e9riode d\u00e9finis ; il peut ne trouver aucune preuve, mais ne peut pas prouver l'absence absolue de compromission.<\/p>","protected":false},"featured_media":0,"template":"single-nrn_service","meta":{"footnotes":""},"nrn_family":[15],"class_list":["post-133","nrn_service","type-nrn_service","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/133","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service"}],"about":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/types\/nrn_service"}],"version-history":[{"count":2,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/133\/revisions"}],"predecessor-version":[{"id":528,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_service\/133\/revisions\/528"}],"wp:attachment":[{"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/media?parent=133"}],"wp:term":[{"taxonomy":"nrn_family","embeddable":true,"href":"https:\/\/neranis.com\/fr\/wp-json\/wp\/v2\/nrn_family?post=133"}],"curies":[{"name":"Bien jou\u00e9","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}