Analysis Summary

The BlackMoon Trojan, also known as KRBanker, initially emerged in late September 2015, targeting South Korean banks using a "pharming" technique. This method redirected users attempting to access legitimate banking sites to forged websites, where they were prompted to enter their credentials, allowing cybercriminals to steal this information.

Recently, researchers have identified a more sophisticated and staged campaign using the BlackMoon Trojan, originating in November 2022. This new campaign primarily targets businesses in the USA and Canada, focusing on evasion and persistence techniques to drop various unwanted programs and maintain a presence in victims' environments for extended periods, rather than stealing credentials.

Impact

• Data Exfiltration
• Credential Theft
• Financial Loss

Indicators of Compromise

MD5

• fea1d804bacb0646a154e316ae0a0967
• a935bb3143363c1e83dbb323f42b66f0

SHA-256

• ae41de76187927b7c46ea9bd4a0d9827c2f4b36545de6de89c12b25eb1e21fb6
• e3a2778322ac4ddfbf4a9b2cb7d9921e996f857ecc50344b6248cf2e5394c756

SHA-1

• 2c866f8ebb080f7f04a74274d746fe78e8c0fd64
• 36ef334a751d3a86933ad771119f72e221ff2244

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.