An aly si s of Op nKe y R a n s o m w a r e C a m p a i g n
Score: 9/10

An aly si s of Op nKe y R a n s o m w a r e C a m p a i g n

Op nKe y is a c o n f i g u r a b l e r a n s o m w a r e k i t u t i l i z i n g D i s c o r d w e b h o o k s f o r C2 c o m m u n i c a t i o n a n d m a s q u e r a d i n g a s l e g i t i m a t e W i n d o w s s e r v i c e s.

Executive Summary

Op nKe y is a s o p h i s t i c a t e d, b u i l d e r - b a s e d r a n s o m w a r e f a m i l y t h a t e x h i b i t s o v e r l a p p i n g t a c t i c s w i t h t h e B l a c k C a t (A L P H V) g r o u p, i n c l u d i n g t h e u s e o f m a s q u e r a d e d s c h e d u l e d t a s k s. T h e m a l w a r e i s d e s i g n e d f o r d o u b l e e x t o r t i o n, t h r e a t e n i n g t o l e a k s t o l e n d a t a v i a T e l e g r a m a n d e m a i l c o n t a c t s i f r a n s o m p a y m e n t s a r e n o t m a d e.

T e c h n i c a l a n a l y s i s r e v e a l s a h i g h l y m o d u l a r c o n f i g u r a t i o n t h a t a l l o w s o p e r a t o r s t o t u n e e n c r y p t i o n b a s e d o n f i l e s i z e, t a r g e t n e t w o r k s h a r e s, a n d k i l l s p e c i f i c p r o c e s s e s t o u n l o c k f i l e s. I t e m p l o y s e x t e n s i v e a n t i - r e c o v e r y t e c h n i q u e s, d e l e t i n g v o l u m e s h a d o w c o p i e s a n d d i s a b l i n g s y s t e m r e p a i r f e a t u r e s t o e n s u r e l o c a l r e s t o r a t i o n i s i m p o s s i b l e.

T h i s t h r e a t i s p a r t i c u l a r l y c o n c e r n i n g d u e t o i t s u s e o f l e g i t i m a t e c l o u d i n f r a s t r u c t u r e l i k e D i s c o r d w e b h o o k s f o r e x f i l t r a t i n g v i c t i m f i n g e r p r i n t s a n d e n c r y p t i o n s t a t u s, m a k i n g i t h a r d e r f o r t r a d i t i o n a l n e t w o r k s e c u r i t y t o o l s t o d i s t i n g u i s h b a d t r a f f i c f r o m n o r m a l b u s i n e s s o p e r a t i o n s.

Key Details

Threat Name

OpnKey Ransomware

Affects

—

Adversary

BlackCat Other Adversaries and Aliases: @opnkey

Malware/Tools

OpnKey, BlackCat, SevenLockDec

Report Score

9out of 10
Quality Score
Excellent
IOC Quality8
TTP Details9
Detection Guidance9
Enterprise Relevance9
Clarity & Structure9
Technical Depth8

Sources