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Adobe Acrobat Sign Abused in Redline Stealer Distribution Campaigns
How threat actors abuse Adobe Acrobat Sign signing requests to deliver Redline Stealer, how the lure reaches users, and what to do to stay…
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Malware profile
RedLine Stealer is information-stealing malware that MITRE says was first identified in 2020.
In short
RedLine Stealer is information-stealing malware that MITRE says was first identified in 2020. It takes saved browser passwords, cookies, card details and cryptocurrency wallet data from infected Windows computers. It was sold to criminals as a service, and in October 2024 an international police operation took down its servers.
RedLine was sold to other criminals, who ran their own campaigns with it. The US Department of Justice says affiliates bought a license and then infected their own targets. The stolen data is called “logs” and is sold on cybercrime forums.
The Department of Justice also says RedLine has been used in intrusions against major corporations. Stolen cookies and other system data can let criminals get round multi-factor authentication.
Public sources use several names for this malware.
| Name | Where it appears |
|---|---|
| RedLine Stealer | MITRE ATT&CK software S1240[1] |
| RedLine | Short name used by the US Department of Justice, the Eurojust press release and the 2026 extradition release[2, 3, 4] |
| META | Closely related infostealer named by the US Department of Justice and Eurojust, taken down in the same operation[2, 3] |
| Operation Magnus | Name of the October 2024 law enforcement operation against RedLine and META[2, 3] |
What MITRE ATT&CK lists this malware as doing, by tactic. Each id opens our technique page where one exists, otherwise MITRE.
Credentials from Password Stores: Credentials from Web Browsers T1555.003
It was designed to take saved logins, card details and autocomplete data from web browsers.[1]
Steal Web Session Cookie T1539
It steals browser cookies and settings. The Department of Justice says this can help criminals get past multi-factor authentication.[1, 2]
Credentials from Password Stores T1555
It has taken logins from VPN services, FTP clients and chat clients.[1]
RedLine does not spread by itself. The US Department of Justice says affiliates spread it with malicious adverts, phishing emails, fake software downloads and malicious software sideloading, and that lures such as COVID-19 and Windows update themes were used. MITRE adds that it has been disguised as legitimate software such as a "PDF Converter Software" and pushed through poisoned search results. In September 2022, Security Boulevard reported a campaign that used hacked Facebook business pages: sponsored posts offered free Adobe Acrobat Reader, the link preview showed Mediafire instead of Adobe, and victims had to download the file, extract it and run it.
MITRE says RedLine Stealer was first identified in 2020.[1]
The Department of Justice alleges that Hambardzum Minasyan registered a cryptocurrency account used to receive payments from RedLine affiliates.[4]
Eurojust says the takedown took place on this date. Three servers in the Netherlands were taken down, two domains seized and two people taken into custody in Belgium.[3]
The US Department of Justice joined partners in announcing the disruption and unsealed charges against Maxim Rudometov, whom it describes as one of the developers and administrators.[2]
The Department of Justice says Hambardzum Minasyan was extradited to the United States on this date to face charges over his alleged role in developing and administering RedLine.[4]
MITRE lists detection strategies for browser credential store access (DET0037) and web session cookie theft (DET0509). The Department of Justice points to the Operation Magnus website, www.operation-magnus.com, for the public and potential victims.[6, 5, 2]
Information-stealing malware for Windows. MITRE says it was first identified in 2020 and was sold as a service to criminals.
The US Department of Justice says usernames and passwords, financial information, system information, cookies and cryptocurrency accounts. Eurojust adds saved form data such as addresses and phone numbers.
In October 2024 an international operation called Operation Magnus took down servers and seized domains. Eurojust says the takedown took place on 28 October 2024 and the US Department of Justice announced it on 29 October 2024.
The US Department of Justice has charged Maxim Rudometov (October 2024) and Hambardzum Minasyan (extradited March 2026). These are allegations, and both are presumed innocent until proven guilty.
Use hardware-based multi-factor authentication, audit logins for stolen session cookies, limit passwords saved in browsers and keep browsers updated, as MITRE advises.
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