Skip to content

fix NitrogenLoader YARA #3003

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
kevoreilly merged 2 commits into from
May 18, 2026
+2 −1
Merged

fix NitrogenLoader YARA #3003

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
4b849e1
fix NitrogenLoader YARA
ruppde May 4, 2026
6379581
Reorder condition in NitrogenLoader.yar
ruppde May 4, 2026
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
3 changes: 2 additions & 1 deletion data/yara/CAPE/NitrogenLoader.yar
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -31,5 +31,6 @@ rule NitrogenLoader
$rc4decrypt_1 = {48 89 ?? 4? 89 ?? E8 [4] 4? 8B ?? 24 [1-4] 4? 89 ?? 4? 89 ?? 4? 89 C1 [0-1] 89 ?? E8 [4] 4? 89}
$rc4decrypt_2 = {E8 [4] 8B ?? 24 [1-4] 4? 89 ?? 48 89 ?? 4? 89 C1 E8 [3] FF}
condition:
(2 of ($string*) and any of ($syscall*)) or 4 of ($decrypt*) or ((3 of ($taskman_*) or 3 of ($installers*)) and all of ($rc4decrypt_*))
uint16(0) == 0x5a4d and
((2 of ($string*) and any of ($syscall*)) or 4 of ($decrypt*) or ((3 of ($taskman_*) or 3 of ($installers*)) and all of ($rc4decrypt_*)))
}
Loading