Threat Group Cards: A Threat Actor Encyclopedia Archived: 2026-04-05 19:03:37 UTC Home > List all groups > List all tools > List all groups using tool Gelup Tool: Gelup Names Gelup Category Malware Type Downloader Description (Trend Micro) In the same June 20 campaign, we also found another apparently new, undisclosed malware, which we named “Gelup”. A custom packer was also used to pack some variants of this malware. Again, it uses the same packer that TA505 has been using. The unpacked payload is written in C++ and basically works as a downloader for another malware. What makes Gelup different, however, is its obfuscation technique and UAC-bypassing function bymocking trusted directories (spoofing the file’s execution path in a trusted directory), abusing auto-elevated executables, and using the dynamic-link library (DLL) side-loading technique. First, Gelup resolves most Windows application programming interfaces (APIs) by using the hash just before calling it —a common technique used by a lot of malware families. Second, the strings in Gelup’s code are decrypted at runtime. Information AlienVault OTX Last change to this tool card: 20 April 2020 Download this tool card in JSON format All groups using tool Gelup Changed Name Country Observed APT groups https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=fabed506-43cc-4663-8ad1-586396c8b76a Page 1 of 2 TA505, Graceful Spider, Gold Evergreen 2006-Nov 2022 1 group listed (1 APT, 0 other, 0 unknown) Source: https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=fabed506-43cc-4663-8ad1-586396c8b76a https://apt.etda.or.th/cgi-bin/listgroups.cgi?u=fabed506-43cc-4663-8ad1-586396c8b76a Page 2 of 2