Analysis Summary

BlackMoon, also known as KrBanker, is a banking Trojan that first emerged in September 2015, initially targeting South Korean banks using a pharming technique to redirect users to fake banking websites and steal credentials. Over the years, it has undergone significant evolution, shifting from simple credential theft to more complex, multi-stage attacks. By late 2022, BlackMoon began targeting businesses in the USA and Canada, focusing on long-term persistence, evasion, and the delivery of additional malware rather than just credential harvesting.

As of 2025, recent campaigns have demonstrated the Trojan's use of modular architecture, allowing it to download spyware, adware, and tools for lateral movement within corporate networks. It employs advanced evasion techniques such as signed and obfuscated binaries, encrypted command-and-control (C2) channels, and the abuse of legitimate system tools like PowerShell, making it difficult to detect. Additionally, it leverages vulnerabilities in outdated VPN software and remote access tools to gain initial access. BlackMoon has effectively transitioned into a stealthy platform for malware delivery and system compromise, posing a persistent threat to business environments in North America.

Impact

• Data Exfiltration
• Credential Theft
• Financial Loss

Indicators of Compromise

SHA1

• c3225e22266ac4ae63091e3721f34f678a8a19fa

• a4a315a56f9ce8b55ffcb1f4d780d1d72ec4e111

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.