diff --git a/backend/app/api/v1/events.py b/backend/app/api/v1/events.py
index 847558b..96e7596 100644
--- a/backend/app/api/v1/events.py
+++ b/backend/app/api/v1/events.py
@@ -179,19 +179,9 @@ def get_event(
     )
     if event is None:
         raise HTTPException(status_code=404, detail="Event not found")
+    base = event_to_summary(event)
     return EventDetail(
-        id=event.id,
-        event_id=event.event_id,
-        host_id=event.host_id,
-        hostname=event.host.hostname,
-        display_name=event.host.display_name,
-        occurred_at=event.occurred_at,
-        received_at=event.received_at,
-        category=event.category,
-        type=event.type,
-        severity=event.severity,
-        title=event.title,
-        summary=event.summary,
+        **base.model_dump(),
         details=event.details,
         raw=event.raw,
         dedup_key=event.dedup_key,
diff --git a/backend/app/schemas/list_models.py b/backend/app/schemas/list_models.py
index 0f9a5f0..253d598 100644
--- a/backend/app/schemas/list_models.py
+++ b/backend/app/schemas/list_models.py
@@ -54,6 +54,7 @@ class EventSummary(BaseModel):
     severity: str
     title: str
     summary: str
+    actor_user: str | None = None
 
     model_config = {"from_attributes": True}
 
diff --git a/backend/app/services/event_actor_user.py b/backend/app/services/event_actor_user.py
new file mode 100644
index 0000000..b697e33
--- /dev/null
+++ b/backend/app/services/event_actor_user.py
@@ -0,0 +1,49 @@
+"""Имя пользователя для событий подключения/аутентификации (колонка «Пользователь» в UI)."""
+
+from __future__ import annotations
+
+from typing import Any
+
+# События, где в details может быть учётная запись (SSH/RDP/sudo/logind и т.д.).
+ACTOR_USER_EVENT_TYPES: frozenset[str] = frozenset(
+    {
+        "ssh.login.success",
+        "ssh.login.failed",
+        "privilege.sudo.command",
+        "session.logind.new",
+        "session.logind.removed",
+        "session.logind.failed",
+        "rdp.login.success",
+        "rdp.login.failed",
+        "rdp.shadow.control.started",
+        "rdp.shadow.control.stopped",
+        "rdp.shadow.control.permission",
+        "winrm.session.started",
+        "smb.admin_share.access",
+        "auth.explicit.credentials",
+        "rdg.connection.success",
+        "rdg.connection.disconnected",
+        "rdg.connection.failed",
+    }
+)
+
+_SHADOW_DETAIL_KEYS = ("shadower_user", "user", "username")
+_DEFAULT_DETAIL_KEYS = ("user", "username")
+
+
+def _pick_detail_value(details: dict[str, Any], keys: tuple[str, ...]) -> str | None:
+    for key in keys:
+        val = details.get(key)
+        if val is not None and str(val).strip() not in ("", "-"):
+            return str(val).strip()
+    return None
+
+
+def extract_event_actor_user(event_type: str, details: dict[str, Any] | None) -> str | None:
+    """Вернуть имя пользователя для auth/connect событий или None (UI покажет «—»)."""
+    if event_type not in ACTOR_USER_EVENT_TYPES:
+        return None
+    if not isinstance(details, dict):
+        return None
+    keys = _SHADOW_DETAIL_KEYS if event_type.startswith("rdp.shadow.") else _DEFAULT_DETAIL_KEYS
+    return _pick_detail_value(details, keys)
diff --git a/backend/app/services/event_summary.py b/backend/app/services/event_summary.py
index 8a9bd67..44dcef6 100644
--- a/backend/app/services/event_summary.py
+++ b/backend/app/services/event_summary.py
@@ -1,5 +1,6 @@
 from app.models.event import Event
 from app.schemas.list_models import EventSummary
+from app.services.event_actor_user import extract_event_actor_user
 
 
 def event_to_summary(event: Event) -> EventSummary:
@@ -18,4 +19,5 @@ def event_to_summary(event: Event) -> EventSummary:
         severity=event.severity,
         title=event.title,
         summary=event.summary,
+        actor_user=extract_event_actor_user(event.type, event.details),
     )
diff --git a/backend/tests/test_event_actor_user.py b/backend/tests/test_event_actor_user.py
new file mode 100644
index 0000000..3ad0629
--- /dev/null
+++ b/backend/tests/test_event_actor_user.py
@@ -0,0 +1,67 @@
+"""Actor user extraction for event list UI."""
+
+import uuid
+
+from app.services.event_actor_user import extract_event_actor_user
+
+
+def test_ssh_login_user():
+    assert extract_event_actor_user(
+        "ssh.login.success",
+        {"user": "deploy", "source_ip": "10.0.0.1"},
+    ) == "deploy"
+
+
+def test_rdp_login_username_fallback():
+    assert extract_event_actor_user(
+        "rdp.login.failed",
+        {"username": "DOMAIN\\admin"},
+    ) == "DOMAIN\\admin"
+
+
+def test_sudo_user():
+    assert extract_event_actor_user(
+        "privilege.sudo.command",
+        {"user": "root", "command": "apt update"},
+    ) == "root"
+
+
+def test_shadow_shadower_user():
+    assert extract_event_actor_user(
+        "rdp.shadow.control.started",
+        {"shadower_user": "admin", "target_user": "user1"},
+    ) == "admin"
+
+
+def test_heartbeat_no_user():
+    assert extract_event_actor_user("agent.heartbeat", {"user": "ignored"}) is None
+
+
+def test_auth_event_missing_user():
+    assert extract_event_actor_user("ssh.login.failed", {}) is None
+
+
+def test_events_list_includes_actor_user(client, auth_headers, jwt_headers):
+    event_id = str(uuid.uuid4())
+    payload = {
+        "schema_version": "1.0",
+        "event_id": event_id,
+        "occurred_at": "2026-05-27T10:00:00+03:00",
+        "source": {"product": "ssh-monitor", "product_version": "1.2.3-SAC"},
+        "host": {"hostname": "actor-host", "os_family": "linux"},
+        "category": "auth",
+        "type": "ssh.login.success",
+        "severity": "info",
+        "title": "SSH ok",
+        "summary": "login",
+        "details": {"user": "alice", "source_ip": "192.0.2.1"},
+    }
+    assert client.post("/api/v1/events", json=payload, headers=auth_headers).status_code == 201
+
+    listed = client.get("/api/v1/events?type=ssh.login.success&hostname=actor", headers=jwt_headers)
+    assert listed.status_code == 200
+    items = listed.json()["items"]
+    assert any(i["actor_user"] == "alice" for i in items)
+
+    dash = client.get("/api/v1/dashboards/recent-events?limit=5", headers=jwt_headers)
+    assert any(i.get("actor_user") == "alice" for i in dash.json())
diff --git a/frontend/src/api.ts b/frontend/src/api.ts
index 1eb2c3c..c12c31b 100644
--- a/frontend/src/api.ts
+++ b/frontend/src/api.ts
@@ -168,6 +168,7 @@ export interface EventSummary {
   severity: string;
   title: string;
   summary: string;
+  actor_user?: string | null;
 }
 
 export interface EventListResponse {
diff --git a/frontend/src/views/DashboardView.vue b/frontend/src/views/DashboardView.vue
index d076a6c..3024785 100644
--- a/frontend/src/views/DashboardView.vue
+++ b/frontend/src/views/DashboardView.vue
@@ -236,6 +236,8 @@
 
           <th>Имя сервера</th>
 
+          <th>Пользователь</th>
+
           <th>Версия агента</th>
 
           <th>Severity</th>
@@ -270,6 +272,8 @@
 
           <td>{{ formatServerName(e.display_name) }}</td>
 
+          <td>{{ e.actor_user || "—" }}</td>
+
           <td>{{ e.product_version || "—" }}</td>
 
           <td :class="'sev-' + e.severity">{{ e.severity }}</td>
diff --git a/frontend/src/views/EventsView.vue b/frontend/src/views/EventsView.vue
index 1ea8539..11e4052 100644
--- a/frontend/src/views/EventsView.vue
+++ b/frontend/src/views/EventsView.vue
@@ -33,6 +33,7 @@
           <th>Время</th>
           <th>Хост</th>
           <th>Имя сервера</th>
+          <th>Пользователь</th>
           <th>Версия агента</th>
           <th>Severity</th>
           <th>Type</th>
@@ -47,6 +48,7 @@
           <td>{{ formatDt(e.occurred_at) }}</td>
           <td>{{ e.hostname }}</td>
           <td>{{ formatServerName(e.display_name) }}</td>
+          <td>{{ e.actor_user || "—" }}</td>
           <td>{{ e.product_version || "—" }}</td>
           <td :class="'sev-' + e.severity">{{ e.severity }}</td>
           <td><code>{{ e.type }}</code></td>