E-Business
ESET Researchers Spot DoubleLocker ‘Innovative’ Android Ransomware
By peter oluka
ESET researchers have spotted the first-ever ransomware misusing Android accessibility services. On top of encrypting data, it also locks the device.
Detected by ESET products as Android/DoubleLocker.A, the ransomware is based on the foundations of a particular banking Trojan, known for misusing accessibility services of the Android operating system.
However, DoubleLocker doesn’t have the functions related to harvesting users’ banking credentials and wiping out their accounts. Instead, it has received two powerful tools for extorting money from its victims.
DoubleLocker can change the device’s PIN, preventing victims from accessing their devices, and also encrypts the data it finds in them – a combination that has not been seen previously in the Android ecosystem.
“Given its banking malware roots, DoubleLocker may well be turned into what could be called ransom-bankers. Two-stage malware that first tries to wipe your bank or PayPal account and subsequently locks your device and data to request a ransom… Speculation aside, we spotted a test version of such a ransom-banker in the wild as long ago as May, 2017,” comments Lukáš Štefanko, the ESET malware researcher who discovered DoubleLocker.
Distribution
DoubleLocker spreads in the very same way as its banking parent does. It is distributed mostly as a fake Adobe Flash Player through compromised websites.
Once launched, the app requests activation of the malware’s accessibility service, named “Google Play Service”. After the malware obtains the accessibility permissions, it uses them to activate device administrator rights and set itself as the default Home application, in both cases without the user’s consent.
“Setting itself as a default home app – a launcher – is a trick that improves the malware’s persistence. Whenever the user clicks on the home button, the ransomware gets activated and the device gets locked again. Thanks to using the accessibility service, the user doesn’t know that they launch malware by hitting Home,” explains Štefanko.
Locking Both Device And Data
DoubleLocker, once executed on the device, creates two reasons for the victims to pay.
First, it changes the device’s PIN, effectively blocking the victim from using it. The new PIN is set to a random value which the attackes neither store nor send anywhere, so it’s impossible for the user or a security expert to recover it. After the ransom is paid, the attacker can remotely reset the PIN and unlock the device.
Second, DoubleLocker encrypts all files from the device’s primary storage directory. It utilizes the AES encryption algorithm, appending the extension “.cryeye”. “The encryption is implemented properly, which means that, unfortunately, there is no way to recover the files without receiving the encryption key from the attackers,” says Štefanko.
The ransom has been set to 0.0130 BTC (approximately USD 54 at time of writing) and the message highlights that it must be paid within 24 hours. However, if the ransom is not paid, the data will remain encrypted and will not be deleted.
How To Get Rid Of It?
In the ransom note, the user is warned against removing or otherwise blocking DoubleLocker: “Without [the software], you will never be able to get your original files back”.
To prevent unwanted removal of the “software”, the crooks even recommend disabling the user’s antivirus software.
“Such advice is irrelevant: all those with a quality security solution installed on their devices are safe from DoubleLocker,” explains Štefanko.
The only viable option to clean the device of the DoubleLocker ransomware is via a factory reset.
For rooted devices, however, there is a method to get past the PIN lock without a factory reset. For the method to work, the device needed to be in the debugging mode before the ransomware got activated.
If this condition is met, then the user can connect to the device by ADB and remove the system file where the PIN is stored by Android. This operation unlocks the screen so that the user can access their device. Then, working in safe mode, the user can deactivate device administrator rights for the malware and uninstall it. In some cases, a device reboot is needed.
As for the data stored on the device, there is no way to recover it, as mentioned earlier.
“DoubleLocker serves as just another reason for mobile users to have a quality security solution installed, and to back up their data on a regular basis,” concludes Štefanko.
Corporate Affairs Commission (CAC) in partnership with the Nigeria Inter-Bank Settlement System (NIBSS) has unveiled a new Application Programming Interface (API) integration system to allow private firms access company data from the Commission’s database.
Hussaini Ishaq Magaji (SAN), registrar general of CAC, who spoke in Abuja at the unveiling said the system would give selected private organizations access to CAC services through technology-based companies, called “super agents.”
“This is a practical step to show that the Commission is committed to meeting the expectations of our customers,” he said.
Magaji explained that the integration allows the agents to retrieve data from the CAC database for use in specific client requests, outside the standard services provided by the Commission.
“Before now, only a few government agencies had this integration, especially those involved in investigations, anti-money laundering, and terrorism financing. Now, private companies that meet the criteria can also access it,” he said.
He said the system complies with the Nigerian Data Protection Act 2023, and information such as residential addresses, phone numbers, and dates of birth may be restricted.
“This is a call to law firms and companies with the right technology. We’ve started with NIPS because of their credibility. Embassies and banks can now authenticate company records directly through them.”
“There are prescribed fees. We already collect them on our portal, and now customers can also pay through these agents,” he explained.
He named NIPS, MoneyPoint, and OPE as some of the companies involved.
“OPE and MoneyPoint handle only registrations. But NIPS has moved further into validation and verification,” he said.
Ngover Ihyembe-Nwankwo, executive director at NIBSS, who represented Premier Oiwoh, managing director, said the service allows secure and efficient data verification.
“This is the result of years of effort to connect our systems with CAC. It will help users verify data within the limits of data protection laws,” she said.
She said the move is a way to lower costs and promote interoperability across the financial sector.
Ministry of Interior has announced the launch of a new Online Citizenship and Business Management Platform in line with the Renewed Hope Agenda of President Bola Tinubu.
A statement signed by Dr Magdalene Ajani, permanent secretary, Ministry of Interior’s said the initiative forms a key part of its ongoing reforms aimed at promoting transparency, enhancing operational efficiency, and significantly improving service delivery to the public.
The new digital platform is designed to streamline the application and processing of citizenship and business-related services, ensuring faster turnaround times and improved user experience.
The platform allows users to apply for and manage business permits, ensuring that both local and foreign businesses operate legally in Nigeria.
It includes an Expatriate Quota System to manage work permits for foreign employees, helping companies hire skilled workers while complying with Nigeria’s immigration laws.
The Citizenship Administration and Management System provides a streamlined online process for applying, tracking, and managing Nigerian citizenship applications and related services.
Members of the public, corporate entities, and other stakeholders are expected to access the platform through the ministry’s website: https://interior.gov.ng , Direct Portal Access: https://candb.interior.gov.ng , or contact candb-support@interior.gov.ng for support and inquiries.
“The Ministry of Interior remains committed to establishing a more efficient, transparent, and secure framework for citizenship administration, while continuously enhancing service delivery through digital transformation,” the statement read in part.
Fifty selected young unemployed Nigerians have completed a four-week intensive digital skills bootcamp under the Digital Literacy for All (DL4ALL) initiative, gaining practical training in Data Science, Artificial Intelligence (AI), and IT Essentials.
The programme, a collaborative effort between the National Information Technology Development Agency (NITDA) and Cisco, was hosted at NITDA’s South West Zonal Office in Victoria Island, Lagos.
Speaking on behalf of the Director General of NITDA, Kashifu Inuwa , the Head of the South West Zonal Office, Mrs. Chioma Okee-Agugwo, described the initiative as a vital component of Nigeria’s digital future. “This is not just a closing ceremony. It is the launchpad for new journeys—anchored in digital knowledge and powered by innovation,” she remarked.
According to the Director General, the initiative is rooted in NITDA’s Strategic Roadmap and Action Plan (SRAP 2.0) and reflects key focus areas including Digital Literacy, Emerging Technologies, and Youth Empowerment. It also aligns with President Bola Ahmed Tinubu’s Renewed Hope Agenda, which seeks to accelerate economic diversification through digitisation, innovation, and skills development.
Inuwa noted that the DL4ALL initiative forms part of Nigeria’s broader commitment to digital inclusion—ensuring that no one is left behind in the evolving digital economy. It also supports the ambitious goal of achieving 70% digital literacy by 2027, championed by the Honourable Minister of Communications, Innovation and Digital Economy, Dr. Bosun Tijani. This national vision aims to equip millions of Nigerians with the skills required to thrive in a tech-driven world.
He further emphasized the importance of empowering youth with globally relevant skills. “They are no longer just consumers of technology. They are creators, innovators, and future employers,” he said.
The NITDA boss explained that throughout the bootcamp, participants engaged in hands-on learning experiences designed to build both technical proficiency and digital leadership capabilities.
“This is only the beginning,” he stated. “Through our zonal strategy, we are bringing innovation closer to local communities. This is how we democratise access and unlock Nigeria’s full digital potential.”
Inuwa expressed appreciation to Cisco for delivering high-impact training and called on stakeholders to continue investing in partnerships, people, and platforms that drive digital inclusion.
He asserted that the newly certified participants are now equipped to contribute meaningfully to Nigeria’s digital economy—armed with the skills to build solutions, secure infrastructure, and launch tech ventures that solve real-world problems.
At the end of the bootcamp, participants demonstrated their knowledge through impressive presentations that showcased the integration of skills acquired across Data Science, AI, and IT Essentials. Many spoke passionately about how the programme had expanded their technical competence and sparked a drive to create job opportunities—not only for themselves but also for others—as entrepreneurs and digital solution providers in their communities.
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