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 has 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

• e740071e0f232423fa6a8d57dca6e964
• 2066b414de225c9f5423bbfc774a389c
• 0677433f622d179ae7e465f0aac81138
• 5f60072f4f22d49c72458d0a681e2ed6
• 081bdc7deac1a803fc7314a7bb6169bc
• 62b3d8cd7578a9f375898cbe8f297296

SHA-256

• 2b32752a9f196531074fe628b56b2862c6f2ba672278b9ae3495b546ef827955
• f058f5aaeabf13db0fd82837a40819ce6bc61b68bc2801878f77faae0694623e
• c53abde04490790b6ea86e7f958a258823c48dc809edb1ea5910574ca7fd9b54
• 084ae1f691914df3fdb937f2abcc67e08070d2958326b38622666adbebc65fde
• 37384753e5737fff417b7da2c1bda44c3d5df334d7c55655895cf279b701b263
• 32e7d2899718bfb9d6a4c986cda6ea91a9794fc729e1be56e822aab0eddf1cca

SHA-1

• 8a5e6b6bc361cbae82ad4dfd3bc88794bf70f7be
• 603b82dfb2f61dfc658637847a6eb7157601022b
• dd981fc078d6bd2a70a4af0856612117ff88f667
• 5444427a2c98486099620a262fb43346b72197a0
• 26a6f01b27b24baffb404502169e44aff571f6a8
• 905e3dbb84b70f0ea4ecd26f643f866369f1cf23

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.