102 lines
3.5 KiB
Markdown
102 lines
3.5 KiB
Markdown
---
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case_id: CASE-2026-0001
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scenario: phishing
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alert_type: mail_suspicious_attachment
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severity: high
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verdict: true_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-2026-0001 Finance user received invoice-themed phishing email
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## 基本信息
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- Case ID: CASE-2026-0001
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- 标题: Finance user received invoice-themed phishing email
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- 告警类型: mail_suspicious_attachment
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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: 真报
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- 严重等级: high
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## 告警摘要
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Finance user received an invoice-themed phishing email containing a malicious HTML attachment that redirected to a credential harvesting page.
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## 关键实体
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- 用户: alice@corp.example
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- 主机: FIN-LAPTOP-12
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- 邮箱: alice@corp.example
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- IP: 198.51.100.20
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- 域名: vendor-payments.com, vendor-payments-login.com
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- 文件 Hash: sha256:phish0001
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- 其他 IOC: https://vendor-payments-login.com/review, billing@vendor-payments.com
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## 关键证据
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- Sender domain was newly observed and failed DMARC.
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- Attachment redirected to a fake Microsoft 365 login page.
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- User clicked the link before mail quarantine completed.
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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：Finance user received an invoice-themed phishing email containing a malicious HTML attachment that redirected to a credential harvesting page.
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2. 提取关键证据并交叉验证：Sender domain was newly observed and failed DMARC.
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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：真报。
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## 结论依据
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- 结论为真报。
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- 最关键依据：Sender domain was newly observed and failed DMARC.
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- 补充依据：Attachment redirected to a fake Microsoft 365 login page.
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## 处置建议
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- 隔离相同主题、发件人或 URL 的邮件样本。
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- 核查用户是否点击或提交凭据，并按需执行凭据重置。
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## 可复用模式
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- 命中模式: scenario:phishing, alert_type:mail_suspicious_attachment
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- 误报特征: 无
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- 需关注的变体: 相关标签：phishing, email, credential-harvest, finance
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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-2026-0002]]
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- 关联实体: [[alice@corp.example]], [[FIN-LAPTOP-12]]
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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=0.662) 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-2026-0002]] (case score=0.631) This directory contains a single case record detailing the investigation of a suspicious payroll notification email flagged due to a shorten...
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### 推荐知识条目
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- [[KB-CRED-HARVEST-PATTERNS]] (knowledge score=0.656) This directory contains a structured knowledge base artifact focused on identifying and investigating credential harvesting campaigns, parti...
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- [[PB-PHISH-001]] (knowledge score=0.639) This directory contains a phishing email investigation playbook designed to standardize incident response procedures for suspicious emails, ...
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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_attachment
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- #verdict/true-positive
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- #phishing
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- #email
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- #credential-harvest
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- #finance
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