eSentire, a leading cybersecurity solutions provider, is warning enterprises and individuals that a hacking group is spearphishing business professionals on LinkedIn with fake job offers in an effort to infect them with a sophisticated backdoor Trojan. Backdoor trojans give threat actors remote control over the victim’s computer, allowing them to send, receive, launch and delete files.
eSentire’s research team, the Threat Response Unit (TRU), discovered that hackers are spearphishing victims with a malicious zip file using the job position listed on the target’s LinkedIn profile. For example, if the LinkedIn member’s job is listed as Senior Account Executive—International Freight the malicious zip file would be titled Senior Account Executive—International Freight position (note the “position” added to the end). Upon opening the fake job offer, the victim unwittingly initiates the stealthy installation of the fileless backdoor, more_eggs. Once loaded, the sophisticated backdoor can download additional malicious plugins and provide hands-on access to the victim’s computer. The threat group behind more_eggs, Golden Chickens, sell the backdoor under a malware- as- a- service(MaaS) arrangement to other cybercriminals. Once more_eggs is on the victim’s computer system, the Golden Eggs seedy customers can go in and infect the system with any type of malware: ransomware, credential stealers, banking malware, or simply use the backdoor as a foothold into the victim’s network so as to exfiltrate data.
