The hackers, identified as UAT4356 by Cisco Talos and STORM-1849 by Microsoft, began infiltrating vulnerable edge devices in early November 2023 in a cyber-espionage campaign tracked as ArcaneDoor.
Cisco Talos Incident Response (Talos IR) has observed the ongoing use of legitimate digital document publishing (DDP) sites for phishing, credential theft and session token theft during recent incident response and threat intelligence engagements. Hosting phishing lures on DDP sites increases the likelihood of a successful phishing attack, since these sites often have a favorable […]
By Jungsoo An, Wayne Lee and Vanja Svajcer. Cisco Talos discovered a new, stealthy espionage campaign that has likely persisted since at least March 2021. The observed activity affects an Islamic non-profit organization using backdoors for a previously unreported malware family we have named “Zardoor.” We believe an advanced threat actor is carrying out this […]
Cisco Talos obtained executable code capable of decrypting files affected by the Babuk Tortilla ransomware variant, allowing Talos to extract and share the private decryption key used by the threat actor. Cisco Talos shared the key with our peers at Avast for inclusion in the Avast Babuk decryptor released in 2021. The decryptor includes all […]
Since April 2022, Cisco Talos has been tracking a malicious campaign operated by the espionage-motivated Arid Viper advanced persistent threat (APT) group targeting Arabic-speaking Android users. In this campaign, the actors leverage custom mobile malware, also known as Android Package files (APKs), to collect sensitive information from targets and deploy additional malware onto infected devices. […]
Cisco Talos has disclosed 17 vulnerabilities over the past two weeks, including nine that exist in a popular VPN software. Attackers could exploit these vulnerabilities in the SoftEther VPN solution for individual and enterprise users to force users to drop their connections or execute arbitrary code on the targeted machine. Talos’ Vulnerability Research team […]
Cisco Talos assesses with high confidence that YoroTrooper, an espionage-focused threat actor first active in June 2022, likely consists of individuals from Kazakhstan based on their use of Kazakh currency and fluency in Kazakh and Russian. The actor also appears to have a defensive interest in the website of the Kazakhstani state-owned email service and […]