Tag: obfuscation

Raspberry Robin, a malicious downloader discovered in 2021, has been circulating for years, primarily spreading through infected USB devices. It stands out due to its unique binary-obfuscation techniques, extensive use of anti-analysis methods, and privilege escalation exploits. The malware uses mu…

A sophisticated PHP reinfector and backdoor malware is targeting WordPress websites, infecting plugin files and database tables. The malware reinfects active plugins, manipulates wp_options and wp_posts tables, and creates malicious admin users. It utilizes WordPress's cron system to maintain contr…

Jamf Threat Labs uncovered malware samples linked to North Korea, built using Flutter, which provides inherent obfuscation. The malware, discovered in late October, includes Go, Python, and Flutter variants. The Flutter-built application presents a minesweeper game while making network requests to …

FakeBat, a loader previously known as Eugenloader and PaykLoader, has resurfaced after a three-month absence. The malware was distributed through a malicious Google ad impersonating the productivity application Notion. The attack chain involves a tracking template, cloaking domain, and a decoy site…

A malicious script targeting e-commerce sites, particularly Magento, has been discovered. The script, found in the dataPost.js file, is heavily obfuscated and designed to steal customer account credentials and admin login details. It waits for login actions to trigger, then scrapes data entered int…

This analysis explores two distinct methods used to infect systems with AsyncRAT through open directories. The first technique involves a multi-stage process using various obfuscated scripts (VBS, BAT, PowerShell) and disguised files to download and execute the AsyncRAT payload. The second method e…

A previously unknown threat actor, Venture Wolf, has been targeting Russian businesses since November 2023. The group uses multiple loaders to deliver MetaStealer, a malware that focuses on manufacturing, construction, IT, and telecommunications industries. The campaign involves disseminating archi…

G700 RAT, an advanced variant of Craxs RAT, targets Android devices and cryptocurrency applications. It employs sophisticated techniques like privilege escalation, phishing, and malicious APK distribution to infiltrate devices. The malware bypasses authentication, captures sensitive data, and manip…

An unknown threat actor is conducting a phishing campaign targeting Facebook business and advertising account users in Taiwan. The campaign uses emails impersonating legal departments, claiming copyright infringement to lure victims into downloading malware. The attackers abuse Google's Appspot dom…

The Latrodectus malware campaign employs a combination of traditional phishing techniques and innovative payload delivery methods to target financial, automotive, and healthcare sectors. The attack chain begins with compromised emails containing malicious PDF or HTML attachments, which redirect use…

Zimperium's zLabs researchers have been tracking Necro.N, a highly intrusive mobile malware campaign, since July. This malware, potentially succeeding Joker, uses obfuscation and steganography to hide malicious payloads within images. It downloads payloads from C2 servers, enabling remote code exec…

This report details the analysis of a skimming campaign, dubbed the 'Mongolian Skimmer,' which utilizes an obfuscation technique involving unusual Unicode characters for variable and function names. While initially appearing as a novel obfuscation approach, it ultimately employs well-known JavaScri…

A sophisticated attack campaign using Bitbucket as a legitimate platform to deliver AsyncRAT has been uncovered. The multi-stage approach involves a VBScript obfuscation layer, followed by a PowerShell payload delivery mechanism, and culminates in the execution of AsyncRAT. The attackers exploit Bi…

A new AsyncRAT malware campaign utilizes TryCloudflare quick tunnels and Python packages to deliver malicious payloads. The attack chain involves HTML attachments with 'search-ms' URI protocol handlers, leading to LNK files that download BAT files. These BAT files then retrieve and execute Python s…

A campaign impersonating Royal Mail was identified delivering Prince ransomware, an open-source variant available on GitHub. The low-volume attack targeted UK and US organizations in mid-September, often originating from contact forms on target websites. The ransomware lacks decryption mechanisms a…

Recent weeks have seen a resurgence of North Korean-aligned groups targeting developers through npm packages. The campaign, which began on August 12, 2024, involves multiple groups using various publication patterns and attack types. The malicious packages contain obfuscated JavaScript that downloa…

This article provides an analysis of the Atomic Infostealer malware family, which has been targeting macOS users throughout 2024. It discusses the various evolving variants, such as Amos, Banshee, Cthulu, Poseidon, and RodrigoStealer, developed and distributed by competing threat actor groups. The …

The analysis delves into the Mekotio Trojan, a sophisticated malware that employs a PowerShell dropper to execute its payload. The dropper employs obfuscation techniques, such as custom XOR decryption, to conceal its operations. It collects system information, communicates with a command-and-contro…

In April 2024, S2W's Threat Research and Intelligence Center TALON analyzed a malicious LNK file disguised as a list of tax evasion explanatory documents. The LNK file executed a PowerShell command to download and run an AutoIt script-based Lilith RAT malware from an attacker's server, which establ…

This intelligence report provides an in-depth analysis of a complex, multi-stage malware campaign called PEAKLIGHT. It details the infection chain, starting with movie lure ZIP files containing malicious LNK files that initiate a JavaScript dropper. This dropper then executes a PowerShell downloade…

This report analyzes the D3F@ck Loader, a malware-as-a-service (MaaS) offering orchestrated by an individual going by the alias Sergei Panteleevich. The loader utilizes various evasion techniques, including the use of Extended Validation certificates, Inno Setup installers with custom Pascal script…

In July 2024, eSentire's Threat Response Unit observed a phishing attack leading to a 0bj3ctivity Stealer malware infection. The attack involved a malicious JavaScript file that retrieved and executed Ande Loader and the 0bj3ctivity Stealer. Ande Loader created persistence, downloaded additional pa…

This analysis examines a recent malware campaign that utilizes the NetSupport RAT, a legitimate remote administration tool, for persistent infections. The threat actors behind this campaign employ obfuscation techniques and updates to evade detection. However, by identifying weaknesses in the obfus…

On July 24, 2024, CrowdStrike Intelligence identified an unattributed spearphishing attempt delivering an inauthentic installer impersonating CrowdStrike's Crash Reporter through a website targeting a German entity. The site utilized JavaScript obfuscation to deliver the malicious installer, which …

HUMAN's Satori Threat Intelligence and Research team recently uncovered a massive ad fraud operation dubbed Konfety, involving threat actors operating 'evil twin' versions of 'decoy twin' apps available on major app marketplaces. The decoy twins on official stores behave normally, while the evil tw…

CYFIRMA discovered Braodo Stealer, a Python-based malware active since early 2024, primarily targeting users in Vietnam but also present in the US, Czechia, Germany, Netherlands, Singapore, and the UK. This malware utilizes GitHub and a Singapore-based VPS server to host and distribute its maliciou…

This document examines the recent activities of the Silver Fox cybercrime group, which has traditionally targeted financial and tax entities but has now shifted its focus towards impersonating national institutions and security companies. The analysis involves a phishing website, Winos remote contr…

This analysis covers the distribution of AsyncRAT malware disguised as an ebook. The compressed file contains a malicious LNK and PowerShell scripts that ultimately execute AsyncRAT. The malware employs various techniques, such as obfuscation, task scheduling, and anti-VM and anti-AV capabilities, …

This report details the multi-stage loading technique utilized by the threat actor Water Sigbin to deliver the PureCrypter loader and XMRig cryptocurrency miner. The actor exploits vulnerabilities in Oracle WebLogic servers, employing fileless execution tactics like DLL reflective and process injec…

A security intelligence report describing a new malware distribution technique where malicious code is dynamically generated for each download attempt, evading detection through unique hash values. The malware, termed 'InnoLoader', disguises itself as legitimate software installers, executing a com…

A cybersecurity analysis has identified a malicious operation involving the distribution of a downloader, dubbed DBatLoader or ModiLoader, through CMD files disguised as innocuous files. The campaign leverages phishing emails containing compressed CMD files that, when executed on English-language W…

Recent observations indicate a surge in JavaScript spreading StrelaStealer, a credential stealer specifically targeting Outlook and Thunderbird email credentials. While the infection chain resembles previous versions, additional checks have been implemented to avoid compromising systems in Russia. …

Elastic Security Labs identified a new wave of email campaigns targeting environments by deploying a novel backdoor dubbed WARMCOOKIE, which communicates via HTTP cookie parameters. The malware is an initial tool used to scout victim networks and deploy additional payloads, with hard-coded command …

This intelligence report describes a malicious operation where the Remcos Remote Access Trojan (RAT) is being disseminated through phishing emails containing an attachment exploiting the Unix-to-Unix Encoding (UUE) technique. The encoded file loads an obfuscated VBScript that fetches additional mal…

This report analyzes a phishing campaign spreading a new Agent Tesla variant designed to infiltrate victims' computers and steal sensitive information like credentials, email contacts, and system details. It leverages techniques like exploiting Microsoft Office vulnerabilities, executing JavaScript…

This report examines a recent malicious campaign involving a JScript-based Remote Access Trojan (RAT) and its connections to the CobaltStrike penetration testing tool. The attack commences with an obfuscated JScript loader distributed through suspected phishing campaigns. Upon execution, it contact…

The report details the latest developments surrounding the DarkGate remote access trojan, including its enhanced capabilities in version 6, the activities of its developer RastaFarEye, and an in-depth analysis of the malware's new features, execution chain, and supported commands. It highlights Dar…

The analysis examines the Wineloader backdoor, a modular malware attributed to the APT29 threat group, which allows further tools or modules to be downloaded through an encrypted command and control channel. It starts with a phishing email luring targets with a wine tasting event invitation. Execut…

This report examines a recent malicious campaign initiated via phishing emails, seemingly from 'QuickBooks,' prompting users to install Java. Clicking the embedded link leads to downloading a malicious JAR file. The JAR contains commands to fetch additional payloads, including an obfuscated AutoIt …

The report details an ongoing malware campaign targeting South Korean users, which disguises malicious payloads as cracked versions of Microsoft Office and other popular software. The attackers are distributing a variety of malware, including downloaders, coin miners, remote access tools (RATs), pr…

This analysis discusses the emergence of a new macOS malware family called 'Cuckoo Stealer', which acts as an infostealer and spyware. It describes Cuckoo Stealer's main features, logic, and provides indicators of compromise to assist threat hunters and defenders. The malware employs techniques lik…

Security researchers have discovered a campaign distributing RemcosRAT through a sophisticated infection chain involving steganography techniques. The attack starts with a malicious Word document exploiting template injection, leading to the download of an RTF file that leverages an equation editor…