Microsoft and DocuSign Targeted in PDF Phishing Campaign
July 4, 2025Microsoft and DocuSign Targeted in PDF Phishing Campaign
July 4, 2025Severity
High
Analysis Summary
Redline Stealer is a type of malware that is used to steal sensitive information from infected systems. The malware was first discovered in 2018 and has been known to target a variety of industries, including finance, retail, healthcare, and technology. The malware is typically spread through phishing emails, fake software downloads, or other forms of social engineering. Once installed on a victim's computer, Redline Stealer can collect a wide range of information, including login credentials, credit card numbers, and other sensitive data.
This stealer is designed to be difficult to detect by traditional antivirus software, and it often uses advanced techniques to evade detection. It can also be used to launch further attacks, such as distributing additional malware or stealing further data.
The malware has been known to target a variety of applications and software, including web browsers, email clients, and messaging applications. It can also capture screenshots and record keystrokes to collect additional information. Redline Stealer has been used in several high-profile cyber attacks and is considered a significant threat to computer security. To protect against Redline Stealer and other types of malware, it is important to practice good cybersecurity hygiene, including regularly updating software and operating systems, using strong passwords, and being cautious when clicking on links or downloading files from unknown sources. It is also recommended to use reputable antivirus and anti-malware software to help detect and remove any infections.
Impact
- Data Exfiltration
- Credential Theft
- Information Theft
- Financial Loss
Indicators of Compromise
MD5
9d53ca91285f0646fd4fd1e93bf321be
82f4907d031b996e1578e15464197f40
932fc6fd1153978c234b821121029803
4a17be04416a97a4f51808d41010007b
SHA-256
b44e63990f2a573889b98de81e916ebf9bbb219877efb321c9be8375bb877061
efaf854dcd1a473e9f6c71b8e0ea9af048c7c1df73d16c837db639fbb0a4628f
765fa5903f87bf9191dfd89f886327ed6a001c6ddd169b0f8f4e117376bb30eb
9df79042b53c89ea13d9ab6640a3f6ad8f63c64fd9d8683378a96ddc0acc225f
SHA-1
b57451e8b0e3f685d28825910f4b77aca5598ee5
669fa06bb9963bc151e9f1d7301873b119504430
d4b2565babaa54935242f1d15c03c9172181b31e
85dce7b10855595a448ef0cdc1deabc175e46bbb
Remediation
- Block all threat indicators at your respective controls.
- Search for indicators of compromise (IOCs) in your environment utilizing your respective security controls.
- Never trust or open links and attachments received from unknown sources/senders.
- Maintain cyber hygiene by updating your anti-virus software and implementing a patch management lifecycle.
- Patch and upgrade any platforms and software timely and make it into a standard security policy. Prioritize patching known exploited vulnerabilities and zero-days.
- Enable antivirus and anti-malware software and update signature definitions promptly. Using multi-layered protection is necessary to secure vulnerable assets.