Blaming Jaime for his sister's death, Hector left the country and became bonded with a Scarab from the Reach.

Source: https://www.cbr.com/best-blue-beetle-villains-dc-comics/

Eventually, Moon Knight and Scarlet Scarab learn the terrifying truth: the Jackal is using the hearts of the innocent children to escape justice; he is taking the hearts and using them to hoodwink the Scales of Justice.

Source: https://screenrant.com/mcu-moon-knights-scales-of-justice-dark-twist/

However, when Scarab got the drop on Batman, she disobeyed the order to save his life.

Source: https://www.cbr.com/batman-robin-complete-timeline-dc-comics/

If it weren't for the Scarab, he'd be a murderer.

Source: https://www.cbr.com/blue-beetle-fixes-man-of-steel-mistakes/

Instead, he finds a piece of biotechnology known as the Scarab, which chooses Jaime as its symbiotic host.

Source: https://mashable.com/video/blue-beetle-trailer-dcu

Jaime's Scarab Khaji-Da had been damaged before he found it, severing the Reach's control over it.

Source: https://www.cbr.com/best-blue-beetle-villains-dc-comics/

Jenny ends up stealing the Scarab out from Victoria's nose, and passes it on to Jaime.

Source: https://collider.com/blue-beetle-ted-kord-dc-comics-explained/

Motivated by his father’s words, Jaime embraces Khaji-Da’s power, fully bonding his brain with that of the Scarab.

Source: https://collider.com/blue-beetle-ending-explained/

Spacecolon is a small toolset used to deploy variants of Scarab ransomware to victims all over the world, and ESET Research believes it is of Turkish origin.

Source: https://mid-east.info/eset-research-analyzes-spacecolon-toolset-which-spreads-ransomware-across-the-world-and-steals-sensitive-data/

The final payload CosmicBeetle deploys is a variant of the Scarab ransomware.

Source: https://mid-east.info/eset-research-analyzes-spacecolon-toolset-which-spreads-ransomware-across-the-world-and-steals-sensitive-data/

This is why Kord's claw was able to attack Blue Beetle without the Scarab defending Jaime, as he was mentally concerned with his dying father.

Source: https://www.cbr.com/blue-beetle-movie-powers/

This version of the Scarlet Scarab was created for the MCU, having almost no bearing whatsoever on the two previous incarnations that showed up a handful of times in the '70s and '80s respectively.

Source: https://screenrant.com/marvel-female-avengers-movie-cast-characters-mcu/

Unlike Kord, he could use the Blue Scarab, which powered the first Blue Beetle.

Source: https://www.cbr.com/dc-best-b-list-justice-leagues-heroes-ranked/