3.4 KiB
3.4 KiB
case_id, scenario, alert_type, severity, verdict, source, openviking_enriched
| case_id | scenario | alert_type | severity | verdict | source | openviking_enriched |
|---|---|---|---|---|---|---|
| CASE-2026-1002 | o365_suspicious_login | azuread_legacy_auth_attempt | medium | false_positive | soc-memory-poc | true |
CASE-2026-1002 Legacy protocol sign-in from unfamiliar IP blocked by policy
基本信息
- Case ID: CASE-2026-1002
- 标题: Legacy protocol sign-in from unfamiliar IP blocked by policy
- 告警类型: azuread_legacy_auth_attempt
- 来源系统: SOC Memory POC Mock Dataset
- 时间范围: 待补充
- 研判人 / Agent: AI Agent Draft
- 最终结论: 误报
- 严重等级: medium
告警摘要
Legacy authentication attempt from a cloud IP was blocked; investigation tied it to an approved migration tool test.
关键实体
- 用户: svc-migration@corp.example
- 主机: 无
- 邮箱: svc-migration@corp.example
- IP: 192.0.2.24
- 域名: 无
- 文件 Hash: 无
- 其他 IOC: 无
关键证据
- The account is a known migration service account.
- Source IP matched approved cloud migration vendor range.
- No successful sign-in occurred due to policy block.
研判过程摘要
- 确认告警场景与核心风险：Legacy authentication attempt from a cloud IP was blocked; investigation tied it to an approved migration tool test.
- 提取关键证据并交叉验证：The account is a known migration service account.
- 对照关联 playbook / KB 复核告警模式与处置路径。
- 基于关键证据与场景模式完成结论判定：误报。
结论依据
- 结论为误报。
- 最关键依据：The account is a known migration service account.
- 补充依据：Source IP matched approved cloud migration vendor range.
处置建议
- 记录误报原因，并更新检测例外或抑制条件。
可复用模式
- 命中模式: scenario:o365_suspicious_login, alert_type:azuread_legacy_auth_attempt
- 误报特征: 本案最终确认为误报，可用于补充抑制条件。
- 需关注的变体: 相关标签：o365, login, false-positive, legacy-auth
关联知识
- 关联 Playbook: PB-O365-LOGIN-001
- 关联 KB: KB-O365-LEGACY-AUTH, KB-O365-IMPOSSIBLE-TRAVEL
- 关联历史 Case: CASE-2026-1001, CASE-2026-1004
- 关联实体: svc-migration@corp.example
自动关联推荐
推荐历史 Case
- CASE-2026-1001 (case score=0.651) This directory contains a structured security incident case report related to a high-severity event in an Office 365 environment, identified...
- CASE-2026-1004 (case score=0.634) This directory contains a single incident case file related to a suspicious Microsoft 365 login attempt, identified as CASE-2026-1004. The c...
推荐知识条目
- KB-O365-IMPOSSIBLE-TRAVEL (knowledge score=0.626) This directory contains a knowledge base artifact focused on analyzing and validating Microsoft 365 impossible travel alerts—security events...
- PB-O365-LOGIN-001 (knowledge score=0.61) This directory contains a security playbook focused on detecting and responding to suspicious Microsoft Entra ID sign-in activities within M...
Lessons Learned
- 本案可沉淀为后续同类告警的快速判定参考。
- 若后续出现相同 lure、同类登录模式或相同关键证据，应优先联想本案与关联知识。
标签
- #case
- #scenario/o365_suspicious_login
- #alert/azuread_legacy_auth_attempt
- #verdict/false-positive
- #o365
- #login
- #false-positive
- #legacy-auth