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MIDDLE EAST AMERICAS IRAN UNITED STATES CYBER POLICY

DOJ Charges 17 Iranian Nationals in Major Cyber Espionage Campaign

REL_TIME: 23 Aug 2026 14:42Z · LANG: EN

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DOJ Charges 17 Iranian Nationals in Major Cyber Espionage Campaign
Lonnie Tague for the Department of Justice · Public domain · source
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The U.S. Department of Justice has unsealed a 14-count superseding indictment charging 17 Iranian nationals affiliated with the Tehran-based Mabna Institute for executing a long-running, state-sponsored cyber espionage and data-theft campaign. Operating on behalf of Iran's Islamic Revolutionary Guard Corps (IRGC) and other clients since at least 2013, the group allegedly compromised thousands of academic, corporate, and government email accounts, stealing at least 31.5 terabytes of research data and intellectual property worldwide.

// Background

The Mabna Institute was established in Tehran to help Iranian research organizations obtain scientific information from foreign institutions. Threat researchers have tracked the group for years under aliases such as Silent Librarian, Cobalt Dickens, and TA407. In 2017, one of the named defendants, Behzad Mesri, was separately charged for attempting to extort $6 million in bitcoin from HBO following a hack of unaired television content. The current charges follow a initial 2018 indictment and occur alongside heightened cyber threats targeting U.S. critical infrastructure.

// Key Developments

  • The 14-count superseding indictment adds eight new defendants to a 2018 case that originally charged nine individuals.
  • Hackers breached systems at 144 U.S. universities, 178 foreign universities, 42 U.S. companies, 11 foreign companies, and at least five U.S. federal and state agencies.
  • Over 100,000 professors' accounts were targeted globally, resulting in approximately 8,000 compromised accounts and 31.5 terabytes of stolen data.
  • Victims include the U.S. Department of Labor, Federal Energy Regulatory Commission, the states of Hawaii and Indiana, the United Nations, UNICEF, and HBO.
  • The U.S. State Department offered a reward of up to $10 million for information leading to the location of five key defendants.

// Timeline

  1. Mabna Institute initiates its global cyber espionage operation targeting university accounts and government systems.

  2. Defendant Behzad Mesri is charged with hacking HBO and attempting to extort $6 million in bitcoin.

  3. U.S. prosecutors unseal an initial seven-count indictment charging nine Mabna Institute members.

  4. DOJ unseals a 14-count superseding indictment adding eight defendants to bring the total to 17, while the State Department issues a $10 million reward for five key individuals.

// Perspectives

[U.S. Department of Justice]

Determined to publicly expose state-sponsored cyber theft networks to disrupt operations, deter future collaborations with the IRGC, and restrict defendants' international movement.

[Cybersecurity Research Community]

Views the Mabna Institute (also tracked as Silent Librarian, Cobalt Dickens, or TA407) as a privatized cyber espionage contractor utilizing persistent spearphishing and social engineering attacks to monetize stolen research.

// Quotes

“the broader network allegedly behind a sweeping, state-sponsored campaign to steal research and intellectual property from American universities, businesses, and government institutions”

[Jamie McDonald, U.S. Attorney for the Southern District of New York] — Describing the scope of the state-sponsored hacking network revealed in the unsealed charges.

“Mabna represents the privatization of state espionage: a contractor selling stolen research to whoever's paying, with the IRGC as an anchor client rather than a sole owner”

[Shmuel Gihon, security research team lead at Check Point Software] — Explaining how the Mabna Institute functions as a private cyber contractor serving state and commercial clients.
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