E-Business
Beware, New Malware Turns Your Computer into Cellular Antenna
A group of Israeli researchers have improved on a way to steal data from air-gapped computers, thought to be safer from attack due to their isolation from the Internet.
They’ve figured out how to turn the computer into a cellular transmitter, leaking bits of data that can be picked up by a nearby low-end mobile phone.
While other research has shown it possible to steal data this way, some of those methods required some hardware modifications to the computer. This attack uses ordinary computer hardware to send out the cellular signals.
Their research, which is featuring this week at the 24th USENIX Security Symposium in Washington, D.C., is the first to show it’s possible to steal data using just specialized malware on the computer and the mobile phone.
“If somebody wanted to get access to somebody’s computer at home — let’s say the computer at home wasn’t per se connected to the Internet — you could possibly receive the signal from outside the person’s house,” said Yisroel Mirsky, a doctoral student at Ben-Gurion University and study co-author.
The air-gapped computer that is targeted does need to have a malware program developed by the researchers installed. That could be accomplished by creating a type of worm that infects a machine when a removable drive is connected. It’s believed this method was used to deliver Stuxnet, the malware that sabotaged Iran’s uranium centrifuges.
The malware, called GSMem, acts as a transmitter on an infected computer. It creates specific, memory-related instructions that are transmitted between a computer’s CPU and memory, generating radio waves at GSM, UMTS and LTE frequencies that can be picked up by a nearby mobile device.
The GSMem component that runs on a computer is tiny. “Because our malware has such a small footprint in the memory, it would be very difficult and can easily evade detection,” said Mordechai Guri, also a doctoral student at Ben-Gurion.
Their receiver was a nine-year-old Motorola C123 so-called “feature” phone, which looks downright ancient compared to mobile phones today. But there are a couple of reasons why they chose it.
Most embassies and many companies ban smartphones from being taken inside their premises, to prevent signals intelligence collection. But some companies, including Intel and defense contractor Lockheed Martin, still allow devices that are not smartphones into sensitive areas, Guri said.
The Motorola C123 was also picked because it uses a digital baseband chip that runs the open-source software OsmocomBB (Open Source Mobile Communications — Baseband). Most of the firmware that runs on baseband chips is closed-source and difficult to modify, and the researchers needed to be able to tamper with it.
The GSMem malware component that runs on the Motorola phone samples the amplitude of the frequency coming off the targeted computer, Mirsky said.
Once both malware components are in place, the data harvesting can begin. The Motorola phone, which can be up to five meters away from the computer, can collect one or two bits per second. That’s just a tiny amount, but enough to pilfer data such as passwords or encryption keys.
Chinese “threat actors” have hacked Microsoft’s SharePoint document software servers and targeted the data of the businesses using it, the firm has said.
China state-backed Linen Typhoon and Violet Typhoon as well as China-based Storm-2603 were said to have “exploited vulnerabilities” in on-premises SharePoint servers, the kind used by firms, but not in its cloud-based service.
The US tech giant has released security updates in response and has advised all on-premises SharePoint server customers to install them.
“Investigations into other actors also using these exploits are still ongoing,” Microsoft said in a statement.
The firm said it had “high confidence” the hackers would continue to target systems which have not installed its security updates.
It added that it would update its website blog with more information as its investigation continues.
Microsoft said it had observed attacks in which hackers had sent a request to a SharePoint server “enabling the theft of the key material by threat actors”.
Charles Carmakal, chief technology officer at Mandiant Consulting firm, a division of Google Cloud, told reporter, it was “aware of several victims in several different sectors across a number of global geographies”.
Carmakal said it appeared that governments and businesses that use SharePoint on their sites were the primary target.
A number of adversaries who stole material encoded by cryptography were then able to regain ongoing access to the victims’ SharePoint data, he said.
“This was exploited in a very broad way, very opportunistically before a patch was made available. That’s why this is significant,” Carmakal said.
Carmakal said the “China-nexus actor” was deploying techniques similar to previous campaigns associated with Beijing.
Microsoft said Linen Typhoon had “focused on stealing intellectual property, primarily targeting organizations related to government, defence, strategic planning, and human rights” for 13 years.
It added that Violet Typhoon had been “dedicated to espionage”, primarily targeting former government and military staff, non-governmental organizations, think tanks, higher education, the media, the financial sector and the health sector in the US, Europe, and East Asia.
Meanwhile, Storm-2603 was “assessed with medium confidence to be a China-based threat actor”.
National Identity Management Commission (NIMC) has issued a public warning that it is not associated with NINcard.com.
According to the commission, the website has been circulating online to offer services for Nigerians seeking National Identification Number (NIN) services.
NIMC, in a post on its official X account on Wednesday, said, “NINcard.com is not in anyway affiliated to NIMC. Stay vigilant!”
The warning was accompanied by screenshots of fake payment receipts and OTP request pages from the website, both of which were boldly stamped “FAKE” by NIMC to alert the public.
National Information Technology Development Agency (NITDA), in partnership with the Advocacy for Policy and Innovation (API), has convened a one-day workshop in Abuja to advance dialogue on the draft Online Harm Protection (OHP) Bill to confront harmful online content.
The bill, a rights-based, locally rooted, and multi-stakeholder initiative, is aimed at addressing the challenges of the digital age.
The event, which held yesterday, brought together government officials, civil society, academics, digital platforms, and legal experts to shape a policy framework designed to combat online ills such as cyberbullying, disinformation, hate speech, digital exploitation, and gender-based violence, while safeguarding democratic freedoms and digital inclusion.
In his keynote remarks, Kashifu Inuwa, director general, NITDA urged a paradigm shift in the way society engages with digital technologies.
“For almost two decades, we have viewed digital technology through a consumer lens. But these technologies are not just products and services. They are transforming how we live, work, and interact. They shape our politics, our society, and our democracy,” he said.
Warning against unaccountable digital power in the hands of private corporations, the DG likened the digital journey to the tale of Alice in Wonderland, where initial fascination with innovation has given way to deeper concerns about privacy, autonomy, and manipulation by big tech platforms.
“We thought we were using Google, but now we realise Google is using us. Social media, once a tool of expression, has become a tool of surveillance and influence,” Inuwa noted.
He, therefore, emphasised the urgency of developing a democratic and accountable framework. He explained that following the 2021 Twitter ban, NITDA facilitated dialogue between the government and platform operators, leading to a Code of Practice that stressed Nigeria’s sovereignty and legal standards.
According to him, the same process birthed the multi-stakeholder steering committee and the OHP White Paper in December 2024, laying the foundation for the current legislative push.
Earlier in her opening remarks, Victoria Manya, co-founder, API, observed the moral and civic necessity of the bill.
Her words: “The internet did not break society, it merely revealed its unfiltered version. Every day, Nigerians are exposed to harassment, disinformation, exploitation, and even algorithmic violence. The OHP Bill is not a war on the Internet. It is a peace offering to its users, a social contract for a digital future that is safe, inclusive, and democratic.
“We cannot answer the question of algorithmic power with unchecked state control. We must answer it with shared, rights-based governance. This bill must not be written for the people, but with them.”
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