Malware that signed users up to subscription services without their permission has been found on thousands of mobiles sold in Africa, according to BBC News. Anti-fraud firm Upstream found the malicious code on 53,000 Tecno handsets, sold in Ethiopia, Cameroon, Egypt, Ghana and South Africa. Transsion, the manufacturer of these devices, claimed the malware was installed in the supply chain without its knowledge. The Triada malware found by Upstream on the Android smartphones installs malicious code known as xHelper which then finds subscription services and submits fraudulent requests on behalf of users, doing so invisibly and without the user’s knowledge. If the request is successful, it consumes pre-paid airtime, the only way to pay for digital services in many developing countries.