E-Business
Cyber Attackers Getting More Undetected in Target Networks – Sophos Report
New report released by Sophos has revealed that Cyber attackers are not only becoming sophisticated now, they are even getting more time undetected in target networks.
John-Shier, Senior-Security-Advisor-at-Sophos
Sophos, a global leader in next-generation cybersecurity, which released the “Active Adversary Playbook 2021,” detailing attacker behaviors and the tools, techniques and procedures (TTPs) that Sophos’ frontline threat hunters and incident responders saw in the wild in 2020.
The TTP detection data also covers early 2021. The findings show that the median attacker dwell time before detection was 11 days – or 264 hours – with the longest undetected intrusion lasting 15 months.
Ransomware featured in 81% of incidents and 69% of attacks involved the use of the remote desktop protocol (RDP) for lateral movement inside the network.
The playbook is based on Sophos telemetry as well as 81 incident investigations and insight from the Sophos Managed Threat Response (MTR) team of threat hunters and analysts and the Sophos Rapid Response team of incident responders.
The aim is to help security teams understand what adversaries do during attacks and how to spot and defend against malicious activity on their network.
Key findings in the playbook include:
- The median attacker dwell time before detection was 11 days – To put this in context, 11 days potentially provide attackers with 264 hours for malicious activity, such as lateral movement, reconnaissance, credential dumping, data exfiltration, and more.
Considering that some of these activities can take just minutes or a few hours to implement – often taking place at night or outside standard working hours – 11 days offers attackers plenty of time to cause damage in an organization’s network.
It is also worth noting that ransomware attacks tend to have a shorter dwell time than “stealth” attacks, because they are all about destruction
- 90% of attacks seen involved the use of the Remote Desktop Protocol (RDP) – and in 69% of all cases, attackers used RDP for internal lateral movement – Security measures for RDP, such a VPNs and multi-factor authentication tend to focus on protecting external access.
However, these don’t work if the attacker is already inside the network. The use of RDP for internal lateral movement is increasingly common in active, hands-on-keyboard attacks such as those involving ransomware
- Interesting correlations emerge among the top five tools found in victim networks. For instance, when PowerShell is used in an attack, Cobalt Strike is seen in 58% of cases, PsExec in 49%, Mimikatz in 33%, and GMER in 19%.
Cobalt Strike and PsExec are used together in 27% of attacks, while Mimikatz and PsExec occur together in 31% of attacks. Lastly, the combination of Cobalt Strike, PowerShell and PsExec occurs in 12% of all attacks.
Such correlations are important because their detection can serve as an early warning of an impending attack or confirm the presence of an active attack
- Ransomware was involved in 81% of the attacks Sophos investigated. The release of ransomware is often the point at which an attack becomes visible to an IT security team. It is, therefore, not surprising that the vast majoirty of the incidents Sophos responded to involved ransomware.
Other attack types Sophos investigated included exfiltration only, cryptominers, banking trojans, wipers, droppers, pen test/attack tools, and more
“The threat landscape is becoming more crowded and complex, with attacks launched by adversaries with a wide range of skills and resources, from script kiddies to nation-state backed threat groups. This can make life challenging for defenders,” said the Senior Security Advisor at Sophos, John Shier. “Over the last year, our incident responders helped to neutralize attacks launched by more than 37 attack groups, using more than 400 different tools between them. Many of these tools are also used by IT administrators and security professionals for their everyday tasks and spotting the difference between benign and malicious activity isn’t always easy.
“With adversaries spending a median of 11 days in the network, implementing their attack while blending in with routine IT activity, it is critical that defenders understand the warning signs to look out for and investigate. One of the biggest red flags, for instance, is when a legitimate tool or activity is detected in an unexpected place. Most of all, defenders should remember that technology can do a great deal but, in today’s threat landscape, may not be enough by itself. Human experience and the ability to respond are a vital part of any security solution.”
Other topics covered in the playbook include the tactics and techniques most likely to signpost an active threat and warrant closer investigation, the earliest signs of attack, the most widely seen stagers, threat types and malicious artefacts, the most prevalent adversary groups seen, and more.
To learn more about attacker behaviors, tactics, techniques and procedures (TTPs) read the Sophos Active Adversary Playbook 2021 on Sophos News.
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.”
These days, people rely heavily on their mobile phones for talking, texting, banking, social media, and storing important personal information. Because of this, scammers and spammers often target phone users.
Mobile fraud, like fake SMS messages and scams, is becoming more common and putting millions at risk of losing money or having their private details stolen.
Airtel’s new AI-powered Spam Alert Service offers a smart and timely way to fight back, marking a major step forward in protecting mobile users in Africa.
A brief look at mobile fraud and spam
Mobile fraud and spam are problems around the world, but they hit harder in places where mobile phone use is growing fast, and safety measures haven’t caught up.
A 2024 report from GSMA Mobile Economy shows that more than 20% of mobile users globally have experienced some kind of mobile fraud, with spam texts being one of the most common.
In Nigeria, the Nigerian Communications Commission (NCC) has noted a sharp rise in scam messages and fake calls, leading to yearly losses in the hundreds of millions of dollars.
These spam texts often include fake links, harmful ads, or tricks to steal personal details. Many people get caught without knowing, which can lead to stolen bank money, identity theft, or damaged devices.
Older spam blockers only work on certain phones or apps, leaving many people, especially those using basic phones, without protection.
Why Airtel’s AI Spam Alert Service stands out
Airtel, a top telecom company in Africa, has launched a new and free service called the AI Spam Alert Service. It’s the first of its kind in Africa and aims to protect mobile users from spam text messages as they come in.
What makes this service different is that it doesn’t read or check the actual message content. Instead, it uses advanced artificial intelligence to quickly study the sender’s behaviour using over 250 signs or patterns, all within a fraction of a second.
Some of those parameters, according to Airtel, includes:
- How frequently the sender changes SIM cards.
- The volume and frequency of messages sent by the message initiator to different recipients.
- The geographical spread of the recipient numbers, whether messages are targeted locally or dispersed nationwide.
- Whether the sender receives replies or only sends messages.
- A cross-reference of numbers previously reported for spam activity.
The AI completes this analysis in just 2 milliseconds, faster than the blink of an eye, allowing real-time alerts to subscribers as suspected spam messages arrive.
How Airtel’s Spam Alert Service improves mobile safety and trust
Airtel’s new AI-powered spam alert system is set to make a big difference in mobile security across Nigeria and the rest of Africa. Instead of depending on users to block spam themselves, the service works directly through the network to stop suspicious messages before they reach people’s phones.
This kind of technology helps users feel safer and more confident using mobile networks—especially as more people rely on their phones for banking and other money-related services.
A 2025 report by McKinsey Digital shows that many Africans worry about mobile security when using digital financial tools. By reducing the risk of spam and fraud, Airtel is not only protecting its users but also helping to build a safer digital space where more people can take part in the growing mobile economy.
According to Airtel, within two months of its launch, the spam alert service system has identified 9,667,008 messages as potential spam.
Why this is a game changer
By building a service that is first-of-its-kind in Africa, Airtel is leading the way in offering spam alerts, powered by AI directly on its network, for over 150 million subscribers across the continent.
In addition, the service is quick, spotting suspicious sender activity in just milliseconds without reading users’ messages.
Finally, the service is free and requires no app downloads or extra setup. Airtel says the turns on automatically, making it easy for everyone to stay protected, even those using basic phones.
By sending signals to users before problems happen, Airtel boosts trust and encourages more people to safely use mobile money and other digital services.
Scammers are always finding new ways to trick consumers through the ubiquitous mobile phones, so increased demand for security improvements is, understandably, shifting to telecom companies.
Airtel’s AI Spam Alert Service is a strong and timely move toward better, smarter protection for users. As more people start using the service, it should help cut down fraud, keep personal information safe, and make mobile use more enjoyable.
As African economies continue to grow more digital, users of telecom services will need more secure and reliable ways to communicate, and Airtel is leading the way towards that safe future.
A widespread cyberattack targeting Microsoft’s (MSFT.O) server software used by thousands of government agencies and businesses for internal document sharing was likely orchestrated by a single actor, a cybersecurity researcher said on Monday.
Microsoft issued an alert on Saturday warning of “active attacks” on on-premise SharePoint servers.
The company clarified that SharePoint Online, part of the Microsoft 365 cloud suite, was not affected by the exploit, which is considered a “zero-day” vulnerability due to its previously undiscovered nature.
“Based on the consistency of the tradecraft seen across observed attacks, the campaign launched on Friday appears to be a single actor. However, it’s possible that this will quickly change,” Rafe Pilling, director of Threat Intelligence at Sophos, a British cybersecurity firm.
That tradecraft included the sending of the same digital payload to multiple targets, Pilling added.
Microsoft said it had “provided security updates and encourages customers to install them,” a company spokesperson said in an emailed statement.
It was not clear who was behind the ongoing hack. The FBI said on Sunday it was aware of the attacks and was working closely with its federal and private-sector partners, but offered no other details.
Britain’s National Cyber Security Centre did not immediately respond to a request for comment.
The Washington Post said unidentified actors in the past few days had exploited a flaw to launch an attack that targeted U.S. and international agencies and businesses.
According to data from Shodan, a search engine that helps to identify internet-linked equipment, over 8,000 servers online could theoretically have already been compromised by hackers.
Those servers include major industrial firms, banks, auditors, healthcare companies, and several U.S. state-level and international government entities.
“The SharePoint incident appears to have created a broad level of compromise across a range of servers globally,” said Daniel Card of British cybersecurity consultancy, PwnDefend.
“Taking an assumed breach approach is wise, and it’s also important to understand that just applying the patch isn’t all that is required here.”
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