Is the DoNot Team Using Android Malware for Intelligence Collection?

In the ever-evolving landscape of cybersecurity, the DoNot Team, an Indian-origin hacking group also referred to as APT-C-35, Origami Elephant, SECTOR02, and Viceroy Tiger, has emerged as a significant threat with their sophisticated methods of cyber attacks. This group, known for its persistent and targeted attacks, has recently been linked to a newly discovered Android malware called Tanzeem and Tanzeem Update. Identified by the cybersecurity firm Cyfirma in late 2024, these malware variants disguise themselves as chat applications but shut down shortly after installation, after obtaining the required permissions, signifying their role in intelligence collection. This deceptive tactic is emblematic of the DoNot Team’s commitment to continuous adaptation and persistence in their cyber threats.

The Evolution of DoNot Team’s Tactics

The DoNot Team has a documented history of employing spear-phishing emails and Android malware to exfiltrate sensitive data from specific targets. The group’s tactics have evolved over the years, becoming increasingly sophisticated. In 2023, they were noted for deploying a .NET-based backdoor, dubbed Firebird, that specifically targeted individuals in regions such as Pakistan and Afghanistan. Firebird’s ability to infiltrate systems and gather intelligence underscored the group’s evolving capabilities and strategic focus. The latest malware, Tanzeem and its update, continue this trend of targeted attacks aimed at harvesting crucial information. Though the specific victims of these new malware variants have not been disclosed, it is presumed that the DoNot Team’s targets are individuals of particular interest for internal intelligence purposes.

The Mechanics Behind Tanzeem Malware

At the core of this new threat is the functionality of the malicious Tanzeem app, which exploits OneSignal, a customer engagement platform. It is speculated that OneSignal is used to send phishing links that facilitate the malware download process. Upon installation, the app masquerades as a legitimate chat application, displaying a fake chat screen. It then prompts users to initiate a chat, subsequently requesting access to various device permissions. These permissions enable the malware to amass extensive amounts of data, including call logs, contacts, messages, location information, account details, and files. Additionally, the malware is capable of performing screen recordings and establishing a connection to a command-and-control server. This extensive access allows the DoNot Team to maintain a persistent presence on the targeted devices, continuously gathering valuable intelligence.

The Implications and Need for Vigilance

The innovative approach of using push notifications in the Tanzeem malware represents a significant escalation in the DoNot Team’s methods for ensuring persistence and successful data exfiltration. The use of push notifications as a technique to entice users into installing further malware exemplifies the group’s resourcefulness and adaptability. This evolution in their tactics underscores the necessity for heightened vigilance and robust cybersecurity measures. As cyber threats grow more advanced, individuals and organizations must be increasingly proactive in safeguarding their systems against such sophisticated attacks. The findings from Cyfirma’s investigation into the Tanzeem malware highlight the ongoing commitment of the DoNot Team to infiltrate and exploit targeted systems, reinforcing the importance of maintaining rigorous cybersecurity defenses.

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