101 lines
3.3 KiB
Markdown
101 lines
3.3 KiB
Markdown
---
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case_id: CASE-2026-0002
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scenario: phishing
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alert_type: mail_suspicious_link
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severity: medium
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verdict: false_positive
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source: soc-memory-poc
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openviking_enriched: true
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---
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# CASE-2026-0002 Payroll notification email flagged but determined benign
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## 基本信息
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- Case ID: CASE-2026-0002
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- 标题: Payroll notification email flagged but determined benign
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- 告警类型: mail_suspicious_link
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- 来源系统: SOC Memory POC Mock Dataset
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- 时间范围: 待补充
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- 研判人 / Agent: AI Agent Draft
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- 最终结论: 误报
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- 严重等级: medium
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## 告警摘要
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Payroll update email was flagged due to a shortened URL, but the destination was the approved HR vendor portal.
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## 关键实体
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- 用户: bob@corp.example
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- 主机: HR-LAPTOP-03
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- 邮箱: bob@corp.example
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- IP: 无
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- 域名: hr-vendor.example
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- 文件 Hash: 无
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- 其他 IOC: https://bit.ly/hr-portal-example, notify@hr-vendor.example
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## 关键证据
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- Sender domain aligned with SPF and DKIM.
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- Destination domain matched approved supplier inventory.
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- No credential prompt anomaly observed.
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## 研判过程摘要
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1. 确认告警场景与核心风险：Payroll update email was flagged due to a shortened URL, but the destination was the approved HR vendor portal.
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2. 提取关键证据并交叉验证：Sender domain aligned with SPF and DKIM.
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3. 对照关联 playbook / KB 复核告警模式与处置路径。
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4. 基于关键证据与场景模式完成结论判定：误报。
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## 结论依据
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- 结论为误报。
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- 最关键依据：Sender domain aligned with SPF and DKIM.
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- 补充依据：Destination domain matched approved supplier inventory.
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## 处置建议
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- 记录误报原因，并更新检测例外或抑制条件。
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## 可复用模式
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- 命中模式: scenario:phishing, alert_type:mail_suspicious_link
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- 误报特征: 本案最终确认为误报，可用于补充抑制条件。
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- 需关注的变体: 相关标签：phishing, email, false-positive, vendor
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## 关联知识
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- 关联 Playbook: [[PB-PHISH-001]]
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- 关联 KB: [[KB-PHISH-HEADER-CHECK]], [[KB-CRED-HARVEST-PATTERNS]]
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- 关联历史 Case: [[CASE-2026-0004]], [[CASE-2026-0001]]
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- 关联实体: [[bob@corp.example]], [[HR-LAPTOP-03]]
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## 自动关联推荐
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### 推荐历史 Case
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- [[CASE-2026-0004]] (case score=0.549) This directory contains a structured incident case report related to a phishing attack targeting a shared mailbox via a spoofed OneDrive not...
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- [[CASE-2026-0001]] (case score=0.532) This directory contains a structured case report detailing a high-severity phishing incident targeting a finance user via a malicious invoic...
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### 推荐知识条目
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- [[PB-PHISH-001]] (knowledge score=0.514) This directory contains a phishing email investigation playbook designed to standardize incident response procedures for suspicious emails, ...
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- [[KB-CRED-HARVEST-PATTERNS]] (knowledge score=0.494) This directory contains a structured knowledge base artifact focused on identifying and investigating credential harvesting campaigns, parti...
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## Lessons Learned
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- 本案可沉淀为后续同类告警的快速判定参考。
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- 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。
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## 标签
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- #case
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- #scenario/phishing
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- #alert/mail_suspicious_link
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- #verdict/false-positive
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- #phishing
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- #email
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- #false-positive
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- #vendor
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