Mouse Computer: a phished staff mailbox sent fake emails to 1,220 business customers and partners
One employee gave away a mail ID and password on a fake site, and the account was then used to send phishing emails to business customers and partners.
Disclosed
2020-05-13
Organizations involved
1
Leaked or at risk
Unknown
Downtime
Unknown
What happened
A phishing email reached an employee in purchasing, who gave away a mail ID and password on a fake site. [3]
The account, entered with the stolen password, sent similar phishing emails. Recipients reported them. [2] [3]
Public disclosure. [1]
A second report gave the sequence of events and the number of emails sent. [3]
Impact
Response
Timeline
- Started 2020-05-08
- Detected 2020-05-12
- Disclosed 2020-05-13
- 5 days
Attack or cause
- Method
- [Phishing][Credential abuse]
- Impact
- [Data leak]
- Entry point
- Stolen credentials
Data exposed or at risk
Organizations involved
[Breached][Major]Tokyo, ChiyodaManufacturing
Mouse Computer Co., Ltd.
Sources
- [1][News]標的型攻撃メールで顧客と取引先のメールアドレス流出(マウスコンピューター)ScanNetSecurity · 2020-05-15 08:00
- [2][News]アカウントが乗っ取り被害、フィッシング踏み台に - マウスコンピューターSecurity NEXT · 2020-05-15
- [3][News]端緒は購買部社員へのフィッシングメール、標的型攻撃メールによるアカウント情報盗取 第2報(マウスコンピューター)ScanNetSecurity · 2020-05-20 08:00