Case Study 1 Account Update / Invoice Fraud Attack Case Study Account Update / Invoice Fraud Attack Overview On April 8, 2020, Abnormal Security detected and stopped an attempted invoice fraud targeting a telecommunications provider, preventing more than $700,000 from being lost. The attacker’s sophisticated operation lasted over 9 weeks. This case study details the sequence of events leading up to the actual attempt. Disclaimer: All parties have been anonymized for this case study. Types of Business Email Compromise (BEC) Attacks BEC attacks can be broken into 9 different categories depending on the pretext of the attacker (Vendor, Employee, Customer), along with the attack technique (Spoofing/Impersonation, or Compromised Account/Account T akeover). Attacks may also leverage a hybri

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