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Denmark warns of increased state-sponsored campaigns targeting the European telcos
- Denmark's cybersecurity agency has issued a warning about increased state-sponsored campaigns targeting European telecom companies.
- The threat assessment in Denmark has raised the cyber espionage threat level for its telecom sector from medium to high due to growing threats across Europe.
- The Danish Social Security Agency highlighted risks including cyber espionage, destructive attacks, cyber activism, and criminal hackers targeting the telecom sector.
- State actors aim to access user data, monitor communications, and potentially launch cyber or physical attacks by targeting telecom providers for espionage.
- Hackers have demonstrated advanced technical capabilities in targeting telecommunications infrastructure and protocols abroad.
- China-linked APT group Salt Typhoon has been targeting global telecom providers, breaching networks using vulnerabilities in Cisco devices.
- Salt Typhoon group compromised U.S. telecom firms by exploiting flaws like CVE-2023-20198 and CVE-2023-20273, maintaining persistence with GRE tunnels.
- Telecoms such as Lumen, AT&T, and Verizon reported securing networks after cyberespionage attempts by Salt Typhoon, emphasizing the ongoing threat.
- Other China-linked groups like Light Basin have targeted mobile carrier networks globally, compromising calling records and text messages from telecom companies.
- CrowdStrike researchers highlighted the deep knowledge of telecommunication network architectures exhibited by threat actors, using protocols like GTP for malicious activities.
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