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Vishing Goes High-Tech: New 'Letscall' Malware Employs Voice Traffic Routing

Vishing Goes High-Tech: New 'Letscall' Malware Employs Voice Traffic Routing

Jul 07, 2023 Mobile Security / Malware
Researchers have issued a warning about an emerging and advanced form of voice phishing ( vishing ) known as " Letscall ." This technique is currently targeting individuals in South Korea. The criminals behind "Letscall" employ a multi-step attack to deceive victims into downloading malicious apps from a counterfeit Google Play Store website. Once the malicious software is installed, it redirects incoming calls to a call center under the control of the criminals. Trained operators posing as bank employees then extract sensitive information from unsuspecting victims. To facilitate the routing of voice traffic, "Letscall" utilizes cutting-edge technologies such as voice over IP (VOIP) and WebRTC. It also makes use of Session Traversal Utilities for NAT (STUN) and Traversal Using Relays around NAT (TURN) protocols, including Google STUN servers, to ensure high-quality phone or video calls and bypass NAT and firewall restrictions. The "Letscall&quo
FakeCalls Vishing Malware Targets South Korean Users via Popular Financial Apps

FakeCalls Vishing Malware Targets South Korean Users via Popular Financial Apps

Mar 17, 2023 Mobile Security / Scam Alert
An Android voice phishing (aka vishing) malware campaign known as FakeCalls has reared its head once again to target South Korean users under the guise of over 20 popular financial apps. "FakeCalls malware possesses the functionality of a Swiss army knife, able not only to conduct its primary aim but also to extract private data from the victim's device," cybersecurity firm Check Point said . FakeCalls was previously documented by Kaspersky in April 2022, describing the malware's capabilities to imitate phone conversations with a bank customer support agent. In the observed attacks, users who install the rogue banking app are enticed into calling the financial institution by offering a fake low-interest loan. At the point where the phone call actually happens, a pre-recorded audio with instructions from the real bank is played. Simultaneously, the malware conceals the phone number with the bank's legitimate number to give the impression that a conversation
SaaS Compliance through the NIST Cybersecurity Framework

SaaS Compliance through the NIST Cybersecurity Framework

Feb 20, 2024Cybersecurity Framework / SaaS Security
The US National Institute of Standards and Technology (NIST) cybersecurity framework is one of the world's most important guidelines for securing networks. It can be applied to any number of applications, including SaaS.  One of the challenges facing those tasked with securing SaaS applications is the different settings found in each application. It makes it difficult to develop a configuration policy that will apply to an HR app that manages employees, a marketing app that manages content, and an R&D app that manages software versions, all while aligning with NIST compliance standards.  However, there are several settings that can be applied to nearly every app in the SaaS stack. In this article, we'll explore some universal configurations, explain why they are important, and guide you in setting them in a way that improves your SaaS apps' security posture.  Start with Admins Role-based access control (RBAC) is a key to NIST adherence and should be applied to every SaaS a
Does Your Help Desk Know Who's Calling?

Does Your Help Desk Know Who's Calling?

Mar 09, 2023 Password Security / Enterprise Security
Phishing, the theft of users' credentials or sensitive data using social engineering, has been a significant threat since the early days of the internet – and continues to plague organizations today,  accounting for more than 30% of all known breaches . And with the mass migration to remote working during the pandemic, hackers have ramped up their efforts to steal login credentials as they take advantage of the chaos and lack of in-person user verification.  This has led to the revival of the old-school technique of vishing, which, like phishing online, involves using social engineering over the phone to steal sensitive information. Vishing attacks have  been on the rise  as a result, with 69% of companies experiencing them in 2021, up from 54% in 2020. These attacks often take the form of job or tech support scams and can be incredibly convincing. In August 2020, the  FBI along with the CISA  issued a warning regarding remote users being targeted by attackers spoofing organizati
cyber security

Are You Vulnerable to Third-Party Breaches Through Interconnected SaaS Apps?

websiteWing SecuritySaaS Security / Risk Management
Protect against cascading risks by identifying and mitigating app2app and third-party SaaS vulnerabilities.
Two Romanian Hackers Extradited to the U.S. Over $18 Million Vishing Scam

Two Romanian Hackers Extradited to the U.S. Over $18 Million Vishing Scam

May 08, 2018
Two Romanian hackers have been extradited to the United States to face 31 criminal charges including computer fraud and abuse, wire fraud conspiracy, wire fraud, and aggravated identity theft. Described as "international computer hackers" by the United States Department of Justice, Teodor Laurentiu Costea , 41, and Robert Codrut Dumitrescu , 40, allegedly rob Americans of more than $18 million in an elaborate phishing scheme. Costea and Dumitrescu were named in the 31-count federal grand jury indictment on August 16 last year and were accused last week in the Northern District of Georgia following their extradition. Another co-defendant, Cosmin Draghici, 28, remains in custody in Romania awaiting his extradition to the United States. "These extraditions send a strong warning to cybercriminals and fraudsters worldwide, that we, along with our law-enforcement partners, will work tirelessly to bring you to justice," said U. S. Attorney Byung J. "BJay&q
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