Threats Tagged 'linux toolkit'

A previously undocumented Linux toolkit has been targeting South Korean automotive and media organizations with minimal detection since early 2025. The campaign employs a HAProxy instance called ted backdoor, compiled within the victim's existing HAProxy version 2.8.12, alongside trojanized versions of crond, agetty, atd, sshd, and polkitd. This sophisticated framework enables remote command execution, malicious script injection into web traffic, credential harvesting, and long-term surveillance. The ted backdoor uses HAProxy's native filter API and internal structures to intercept SSL-decrypted HTTP traffic while maintaining legitimate load balancing operations. Operating alongside are an SSH keylogger, a curl-based RAT with HAProxy health monitoring capabilities, and a deployment stager. The toolkit is attributed with medium confidence to DPRK APTs based on targeting patterns, simple XOR-based encryption schemes, custom substitution ciphers, and C2 infrastructure associated with APT37.

MediumMalwareSouth Korea#haproxy#curlrat#trojanized binaries

Since mid-2025, a Chinese-speaking cybercrime group dubbed Gambling Goblin has conducted a sustained campaign targeting Brazilian organizations, mainly government and educational institutions. The attackers compromise web servers and install malicious Apache modules that stealthily reverse-proxy visitors to phishing pages impersonating trusted app stores. These phishing pages promote online gambling and sports betting while leveraging hijacked high-reputation domains to manipulate search engine rankings and hijack traffic. The group uses a heavily obfuscated Linux toolkit including downloaders, backdoors, credential stealers, and brute-forcers. The infrastructure is scalable and extends beyond Brazil, with parallel phishing networks targeting Vietnamese, Spanish, and English-speaking victims. The phishing infrastructure could be reconfigured to deliver malware directly, posing a latent escalation risk.

HighCampaignBrazil#linux#phishing#malware