Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-05 19:48:43 UTC Home > List all groups > List all tools > List all groups using tool SPARKLOG Tool: SPARKLOG Names SPARKLOG Category Malware Type Loader Description (Cybereason) SPARKLOG (spark.exe) is a 32 bit executable written in C++, employed in this attack to extract a DLL from the CLFS file, decrypt it and then launch it for side-loading by Windows services running as SYSTEM. Executing this phase of the attack successfully enables the attackers to gain Privilege Escalation and also Persistence in a specific case. Information Last change to this tool card: 19 July 2022 Download this tool card in JSON format All groups using tool SPARKLOG Changed Name Country Observed APT groups   APT 41 2012-Jul 2025 1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=b7eea0f5-2163-4a25-9078-77bdca383523 https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=b7eea0f5-2163-4a25-9078-77bdca383523 Page 1 of 1