Google Data Breach: Business User Information Compromised In a recent announcement, Google confirmed that a cyberattack attributed to the ShinyHunters ransomware group has led to unauthorized access of business user data within its corporate databases. The breach specifically targeted a Salesforce system that stores contact information for small and medium-sized…
Stealthy New Ymir Ransomware Utilizes Memory Exploits to Target Corporate Networks
November 12, 2024
Cyber Attack / Cybercrime
Cybersecurity experts have identified a new ransomware variant, Ymir, which was deployed in an attack just two days after systems were compromised by RustyStealer, a type of credential-stealing malware. Kaspersky, a prominent Russian cybersecurity firm, noted that “Ymir ransomware features a distinctive mix of technical capabilities and tactics that bolster its effectiveness.” The attackers employed an unusual combination of memory management functions—malloc, memmove, and memcmp—to execute malicious code directly within system memory. This method diverges from the conventional execution flow found in common ransomware, significantly enhancing its stealth. Kaspersky reported observing this ransomware in an attack on an unnamed Colombian organization, with the threat actors leveraging stolen corporate credentials acquired through RustyStealer to gain unauthorized access.
New Ymir Ransomware Unveiled: A Stealthy Threat to Corporate Networks November 12, 2024 Cyber Attack / Cybercrime Cybersecurity experts have identified a newly emerged ransomware variant dubbed Ymir, which has been linked to a recent cyberattack. This attack occurred just two days after an initial compromise via a stealer malware…
Stealthy New Ymir Ransomware Utilizes Memory Exploits to Target Corporate Networks
November 12, 2024
Cyber Attack / Cybercrime
Cybersecurity experts have identified a new ransomware variant, Ymir, which was deployed in an attack just two days after systems were compromised by RustyStealer, a type of credential-stealing malware. Kaspersky, a prominent Russian cybersecurity firm, noted that “Ymir ransomware features a distinctive mix of technical capabilities and tactics that bolster its effectiveness.” The attackers employed an unusual combination of memory management functions—malloc, memmove, and memcmp—to execute malicious code directly within system memory. This method diverges from the conventional execution flow found in common ransomware, significantly enhancing its stealth. Kaspersky reported observing this ransomware in an attack on an unnamed Colombian organization, with the threat actors leveraging stolen corporate credentials acquired through RustyStealer to gain unauthorized access.
The recent shifts in the United States’ cybersecurity landscape illustrate a tumultuous period marked by significant policy changes under the Trump administration. The alterations to fiscal policy and foreign relations, coupled with widespread dismissals of federal staff, have left crucial cybersecurity priorities shrouded in uncertainty. This concern was evident at…
Data Breach Notification, Data Security, Fraud Management & Cybercrime Interlock Claims to Possess 1.5TB of DaVita’s Data Amid Rising Costs Marianne Kolbasuk McGee (HealthInfoSec) • August 6, 2025 Image: DaVita Inc. DaVita Inc., a leading provider in kidney dialysis services globally, recently reported to regulators that a cyberattack occurring in…
Surge in Cybercrime: Alarming Trends in Ransomware and Infostealer Attacks Recent research highlights a significant escalation in cybercrime activity throughout 2025, characterized by substantial increases across various types of threats. Notably, there has been a staggering 800% rise in credential theft attributed to information-stealing malware, defining identity theft as a…
Cybersecurity researchers have identified a new iteration of the ZLoader malware that utilizes Domain Name System (DNS) tunneling for command-and-control (C2) communications, showcasing that threat actors are actively enhancing their toolset after its reappearance a year ago. “Zloader version 2.9.4.0 features significant improvements, including a custom DNS tunnel protocol for C2 communications and an interactive shell supporting over a dozen commands, potentially aiding in ransomware attacks,” Zscaler ThreatLabz noted in a report released on Tuesday. “These enhancements provide added resilience against detection and mitigation efforts.” ZLoader, also known as Terdot, DELoader, or Silent Night, functions as a malware loader capable of deploying subsequent payloads. Following the shutdown of its infrastructure, malware campaigns distributing ZLoader were observed again for the first time in nearly two years in September 2023.
ZLoader Malware Resurfaces Utilizing DNS Tunneling for C2 Communications On December 11, 2024, cybersecurity experts reported the emergence of an updated version of the ZLoader malware, which now employs a Domain Name System (DNS) tunneling technique for its command-and-control (C2) communications. This advancement illustrates a continued evolution of this malicious…
Cybersecurity researchers have identified a new iteration of the ZLoader malware that utilizes Domain Name System (DNS) tunneling for command-and-control (C2) communications, showcasing that threat actors are actively enhancing their toolset after its reappearance a year ago. “Zloader version 2.9.4.0 features significant improvements, including a custom DNS tunnel protocol for C2 communications and an interactive shell supporting over a dozen commands, potentially aiding in ransomware attacks,” Zscaler ThreatLabz noted in a report released on Tuesday. “These enhancements provide added resilience against detection and mitigation efforts.” ZLoader, also known as Terdot, DELoader, or Silent Night, functions as a malware loader capable of deploying subsequent payloads. Following the shutdown of its infrastructure, malware campaigns distributing ZLoader were observed again for the first time in nearly two years in September 2023.
Ransomware Attack on Arkansas Oncology Group Impacts Over 113,000 Patients In a significant data breach, the Arkansas Oncology Group reported a ransomware attack affecting approximately 113,500 individuals. This incident, as detailed by the HIPAA Journal, underscores the increasing threats posed by cybercriminals in the healthcare sector, which frequently stores sensitive…
Black Hat, Cyberwarfare / Nation-State Attacks, Events Also: Rethinking IT-OT Integration; Previewing Black Hat 2025 Anna Delaney (annamadeline) • August 1, 2025 Clockwise, from top left: Anna Delaney, Mathew Schwartz, Suparna Goswami, and Tom Field This week, four editors from ISMG convened to delve into the latest developments surrounding the…
Cyberattacks on U.S. Cities Increasingly Disruptive: Recent Incidents in Abilene and St. Paul In recent months, U.S. cities have been facing a surge in hacking incidents, many of which involve ransomware attacks that disrupt essential services and carry significant financial burdens. Abilene, Texas, recently experienced a serious breach wherein 477…
