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Threat Research Knowledge Base Threats Shlayer
Shlayer
Description
Shlayer is a Trojan downloader that primarily targets macOS systems, known for distributing various types of adware, including Bundlore. It is distributed through fake Flash Player updates and deceptive websites, tricking users into installing unwanted software. Once executed, Shlayer connects to command-and-control servers to download additional payloads.
Variant Names
N/A
Alternative Names
N/A
Country of origin
Unknown
Symptoms
You might observe the following artifacts associated with this threat:
- Pop-up advertisements appearing unexpectedly.
- Unexpected redirects to suspicious websites.
- Installation of adware, including Bundlore, without user consent.
- Decreased system performance due to adware activity.
Technical Breakdown
Shlayer is distributed through deceptive means such as:
- Fake Software Updates: Most commonly posing as Adobe Flash Player updates, tricking users into installation.
- Deceptive Websites: Promoted via malvertising campaigns that direct users to malicious sites.
Shlayer performs the following actions:
- Payload Delivery: Connects to a command-and-control (C2) server to download additional malicious payloads, including adware.
- Persistence Mechanism: May install launch agents or login items to ensure it runs at startup.
- Traffic Redirection: Alters browser settings to redirect search traffic for ad revenue generation.
Next Steps
Kandji Endpoint Detection & Response (EDR) automatically removes detected threats when file monitoring is set to Protect.
While the malicious file is removed, it can leave behind artifacts that need to be cleaned manually.
In the future, avoid downloading and installing software from torrent sources or untrusted websites. Ensure that all applications are obtained from official and reputable sources to maintain system integrity and security.
Related
AppleJeus is a sophisticated macOS trojan attributed to North Korea's state-sponsored APT Lazarus Group. This malware has been used for years to infiltrate cryptocurrency exchanges and financial service companies by masquerading as legitimate applications. AppleJeus enables unauthorized access, facilitates data exfiltration, and can lead to significant financial losses.
Atomic Stealer (AMOS) is a sophisticated piece of malware that targets Apple users by masquerading as legitimate applications. Once installed, AMOS can exfiltrate extensive data, including keychain passwords, user documents, system information, browser data, credit card information, and cryptocurrency wallets. There is a strong association between Atomic Stealer and Russian-speaking cybercriminal communities.
Bundlore is an extremely prevalent adware that targets macOS systems by bundling unwanted applications with legitimate software installers. It often masquerades as popular software updaters and installers, deceiving users into installing additional unwanted programs. Once installed, Bundlore injects advertisements into web browsers, redirects user searches, and collects sensitive browsing data. Bundlore is sometimes dropped by macOS malware Shlayer.
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