Saturday , June 21 2025
diagram

Researchers Unveil Massive Quad7 Botnet Targeting Microsoft 365

Sekoia.io and Intrinsec analyzed the Quad7 (7777) botnet, which uses TCP port 7777 on infected routers to carry out brute-force attacks on Microsoft 365 accounts. Attacks were detected on 0.11% of monitored accounts.

Key insights highlighted by researchers:

Russia detects first SuperCard malware attacks via NFC

Russian cybersecurity experts discovered the first local data theft attacks using a modified version of legitimate near field communication (NFC)...
Read More
Russia detects first SuperCard malware attacks via NFC

Income Property Investments exposes 170,000+ Individuals record

Cybersecurity researcher Jeremiah Fowler discovered an unsecured database with 170,360 records belonging to a real estate company. It contained personal...
Read More
Income Property Investments exposes 170,000+ Individuals record

ALERT (CVE: 2023-28771)
Zyxel Firewalls Under Attack via CVE-2023-28771 by 244 IPs

GreyNoise found attempts to exploit CVE-2023-28771, a vulnerability in Zyxel's IKE affecting UDP port 500. The attack centers around CVE-2023-28771,...
Read More
ALERT (CVE: 2023-28771)  Zyxel Firewalls Under Attack via CVE-2023-28771 by 244 IPs

CISA Flags Active Exploits in Apple iOS and TP-Link Routers

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has recently included two high-risk vulnerabilities in its Known Exploited Vulnerabilities (KEV)...
Read More
CISA Flags Active Exploits in Apple iOS and TP-Link Routers

10K Records Allegedly from Mac Cloud Provider’s Customers Leaked Online

SafetyDetectives’ Cybersecurity Team discovered a public post on a clear web forum in which a threat actor claimed to have...
Read More
10K Records Allegedly from Mac Cloud Provider’s Customers Leaked Online

Canada 2nd largest airlines “WestJet” investigates cyberattack disrupting internal systems

WestJet, Canada's second-largest airline, is looking into a cyberattack that has affected some internal systems during its response to the...
Read More
Canada 2nd largest airlines “WestJet” investigates cyberattack disrupting internal systems

Paraguay 7.4 Million Citizen Records Leaked on Dark Web

Resecurity found 7.4 million records of Paraguayan citizens' personal information leaked on the dark web today. Last week, cybercriminals attempted...
Read More
Paraguay 7.4 Million Citizen Records Leaked on Dark Web

High-Severity Flaw in HashiCorp Nomad Allows Privilege Escalation

HashiCorp has revealed a critical vulnerability in its Nomad tool that may let attackers gain higher privileges by misusing the...
Read More
High-Severity Flaw in HashiCorp Nomad Allows Privilege Escalation

SoftBank: Over 137,000 personal info leaked

SoftBank has disclosed that personal information of more than 137,000 mobile subscribers—covering names, addresses, and phone numbers—might have been leaked...
Read More
SoftBank: Over 137,000 personal info leaked

Alert
Trend Micro Apex One Flaw Allow Attackers to Inject Malicious Code

Serious security vulnerabilities in Trend Micro Apex One could allow attackers to inject malicious code and elevate their privileges within...
Read More
Alert  Trend Micro Apex One Flaw Allow Attackers to Inject Malicious Code

Botnet Evolution: Quad7 has been active for a long time and continues to evolve. The number of unique IP addresses has decreased from 16,000 in August 2022 to 7,000 in July 2024. The highest number of infected devices are in Bulgaria, Russia, the USA, and Ukraine.

Botnet Targets: Quad7 targets various IoT devices, including IP cameras, NAS devices, and SOHO routers, primarily TP-Link.

TP-Link Detection: Botnet operators disable the TP-Link management interface after compromise, making detection difficult. Researchers used the hping3 tool and found that most devices have a TCP window size characteristic of older Linux kernel versions used in TP-Link routers.

  Source: Sekoia

Researchers observed a TP-Link WR841N router with insecure firmware that allowed access from five different IP addresses. Experts set up remote analysis and utilized the Scapy library to monitor authentication attempts.

After observing for several days, an attack happened when the attacker used a weakness to access files and run code. The hacker used Dropbear on a different port and sent a utility package through an SSH connection. They also stopped the web interface and uploaded files to the router.

The Telnet binary listens on TCP/7777 and redirects incoming connections to a simple authenticated shell named xlogin. Additionally, a Socks5 proxy server listens on SOCKS/11288, through which brute force attacks on Microsoft 365 accounts are conducted.

The Quad7 botnet is targeting Microsoft 365 accounts with Password Spraying attacks. It connects to servers for IP address verification and binary file updates. Important questions about the attacks, vulnerabilities, and botnet’s geographical distribution remain unanswered. Researchers at Sekoia.io ask companies with a wider perspective for help in solving these mysteries.

Check Also

internal systems

Canada 2nd largest airlines “WestJet” investigates cyberattack disrupting internal systems

WestJet, Canada’s second-largest airline, is looking into a cyberattack that has affected some internal systems …

Leave a Reply

Your email address will not be published. Required fields are marked *