AngrySpark is a backdoor malware campaign identified on a single UK machine in 2022. It employs a multi-stage infection chain: a DLL posing as a Windows Task Scheduler component, a custom virtual machine interpreter executing obfuscated bytecode, and a beacon that profiles infected systems while hiding C2 traffic as PNG image requests. The malware uses strong cryptographic protections (RSA-4096 and XXTEA) for its dual C2 channels, direct syscalls to evade usermode hooks, and advanced anti-analysis techniques including hypervisor detection and CET awareness. The campaign was maintained for about a year with active updates to syscall tables and configurations. The infrastructure was decommissioned in mid-2023, and no further infections or samples have been found. Indicators include multiple domains, IPs, hashes, and URLs linked to the campaign.

The malware enables persistent backdoor access with sophisticated evasion and anti-analysis capabilities. It can profile infected systems and maintain stealthy communications with its C2 infrastructure. However, its impact was limited to a single known victim in the United Kingdom. The operation ceased after infrastructure expiration in mid-2023, and no further infections have been identified. There are no known exploits in the wild beyond this isolated case.

No official patch or remediation is available as this is malware rather than a software vulnerability. The campaign has ceased following infrastructure expiration in mid-2023. Organizations should use the provided indicators of compromise (domains, IPs, hashes, URLs) to detect any potential remnants or related activity. Standard malware detection and incident response procedures apply. Patch status is not applicable. Monitor for any resurgence or new samples referencing AngrySpark.