Cybercriminals Turn to Android Loaders on Dark Web to Evade Google Play Security

Malicious loader programs capable of trojanizing Android applications are being traded on the criminal underground for up to $20,000 as a way to evade Google Play Store defenses. "The most popular application categories to hide malware and unwanted software include cryptocurrency trackers,...

Typhon Reborn Stealer Malware Resurfaces with Advanced Evasion Techniques

The threat actor behind the information-stealing malware known as Typhon Reborn has resurfaced with an updated version V2 that packs in improved capabilities to evade detection and resist analysis. The new version is offered for sale on the criminal underground for $59 per month, $360 per year, o...

Typhon Reborn V2: Updated stealer features enhanced anti-analysis and evasion capabilities

The developer of the Typhon Reborn information stealer released version 2 V2 in January, which included significant updates to its codebase and improved capabilities. Most notably, the new version features additional anti-analysis and anti-virtual machine VM capabilities to evade detection and ma...

Researchers Shed Light on CatB Ransomware's Evasion Techniques

The threat actors behind the CatB ransomware operation have been observed using a technique called DLL search order hijacking to evade detection and launch the payload. CatB, also referred to as CatB99 and Baxtoy, emerged late last year and is said to be an "evolution or direct rebrand" of anothe...

FormBook Malware Spreads via Malvertising Using MalVirt Loader to Evade Detection

An ongoing malvertising campaign is being used to distribute virtualized .NET loaders that are designed to deploy the FormBook information-stealing malware. "The loaders, dubbed MalVirt, use obfuscated virtualization for anti-analysis and evasion along with the Windows Process Explorer driver for...

FormBook Malware Spreads via Malvertising Using MalVirt Loader to Evade Detection

An ongoing malvertising campaign is being used to distribute virtualized .NET loaders that are designed to deploy the FormBook information-stealing malware. "The loaders, dubbed MalVirt, use obfuscated virtualization for anti-analysis and evasion along with the Windows Process Explorer driver for...

GuLoader: The NSIS Vantage Point

GuLoader: The NSIS Vantage Point By Nico Paulo Yturriaga · January 24, 2023 GuLoader is an advanced shellcode downloader infamous for using anti-analysis tricks to evade detection and obstruct reverse engineering. As of this writing, the GuLoader campaign is aggressively ongoing. Trellix’s...

GuLoader: The NSIS Vantage Point

GuLoader: The NSIS Vantage Point By Nico Paulo Yturriaga · January 24, 2023 GuLoader is an advanced shellcode downloader infamous for using anti-analysis tricks to evade detection and obstruct reverse engineering. As of this writing, the GuLoader campaign is aggressively ongoing. Trellix’s...

GuLoader’s Advanced Anti-Analysis Techniques

Threat Level Attack Report For a detailed threat advisory, download the pdf file here Summary GuLoader is an advanced malware downloader that uses polymorphic shellcode to bypass traditional security solutions. In GuLoader, all embedded DJB2 hash values are mapped against every API used by the...

GuLoader Malware Utilizing New Techniques to Evade Security Software

Cybersecurity researchers have exposed a wide variety of techniques adopted by an advanced malware downloader called GuLoader to evade security software. "New shellcode anti-analysis technique attempts to thwart researchers and hostile environments by scanning entire process memory for any virtua...

Typhon Stealer back with new variant named Typhon Reborn

Threat Level Attack Report For a detailed threat advisory, download the pdf file here Summary Typhon Stealer, a malware who became widely known for its capabilities to steal crypto wallets, monitor keystrokes, and evade antivirus programs, became widely known in early August 2022. Soon after, the...

Threat Roundup for October 21 to October 28

Today, Talos is publishing a glimpse into the most prevalent threats weve observed between Oct. 21 and Oct. 28. As with previous roundups, this post isnt meant to be an in-depth analysis. Instead, this post will summarize the threats weve observed by highlighting key behavioral characteristics,...

Prynt Stealer Contains a Backdoor to Steal Victims' Data Stolen by Other Cybercriminals

Researchers discovered a private Telegram channel-based backdoor in the information stealing malware, dubbed Prynt Stealer, which its developer added with the intention of secretly stealing a copy of victims' exfiltrated data when used by other cybercriminals. "While this untrustworthy behavior i...

Researchers Detail Evasive DarkTortilla Crypter Used to Deliver Malware

A .NET-based evasive crypter named DarkTortilla has been used by threat actors to distribute a broad array of commodity malware as well as targeted payloads like Cobalt Strike and Metasploit, likely since 2015. "It can also deliver 'add-on packages' such as additional malicious payloads, benign...

Novel ‘Nerbian’ Trojan Uses Advanced Anti-Detection Tricks

A newly discovered and complex remote access trojan RAT is spreading via malicious email campaigns using COVID-19 lures and includes numerous features to evade analysis or detection by researchers, Proofpoint has found. Dubbed Nerbian RAT, the novel malware variant is written in the OS-agnostic G...

Researchers Warn of Nerbian RAT Targeting Entities in Italy, Spain, and the U.K.

A previously undocumented remote access trojan RAT written in the Go programming language has been spotted disproportionately targeting entities in Italy, Spain, and the U.K. Called Nerbian RAT by enterprise security firm Proofpoint, the novel malware leverages COVID-19-themed lures to propagate ...

Experts Detail Saintstealer and Prynt Stealer Info-Stealing Malware Families

Cybersecurity researchers have dissected the inner workings of an information-stealing malware called Saintstealer that's designed to siphon credentials and system information. "After execution, the stealer extracts username, passwords, credit card details, etc.," Cyble researchers said in an...

Experts Shed Light on BlackGuard Infostealer Malware Sold on Russian Hacking Forums

A previously undocumented "sophisticated" information-stealing malware named BlackGuard is being advertised for sale on Russian underground forums for a monthly subscription of $200. "BlackGuard has the capability to steal all types of information related to Crypto wallets, VPN, Messengers, FTP...

New Malware Loader 'Verblecon' Infects Hacked PCs with Cryptocurrency Miners

An unidentified threat actor has been observed employing a "complex and powerful" malware loader with the ultimate objective of deploying cryptocurrency miners on compromised systems and potentially facilitating the theft of Discord tokens. "The evidence found on victim networks appears to indica...

The Top 5 Russian Cyber Threat Actors to Watch

This post was updated on March 10, 2022 to include a section on the Conti Ransomware Group. As we continue to monitor the situation between Russia and Ukraine – and the potential for global cybersecurity impacts – we realize that our customers and other business and industry stakeholders may be...