CVE-2022-31510

The CVE-2022-31510 entry concerns the sergeKashkin/Simple-RAT repository (before 2022-05-03) where an unsafe use of Flask send_file enables absolute path traversal. The root cause is improper handling of file paths in the Flask call, leading to potential access to arbitrary files on the server. T...

Bitter APT Hackers Continue to Target Bangladesh Military Entities

Military entities located in Bangladesh continue to be at the receiving end of sustained cyberattacks by an advanced persistent threat tracked as Bitter. "Through malicious document files and intermediate malware stages the threat actors conduct espionage by deploying Remote Access Trojans,"...

The vulnerability in the implementation of the SetString() function in the Rat class of the math/big programming language in Go allows a attacker to cause a service failure.

The vulnerability of the SetString function implementation in the Rat class of the Go programming language in the math/big package involves resource exhaustion. Exploiting this vulnerability could allow an attacker to cause a service failure...

Researchers Detail PureCrypter Loader Cyber Criminals Using to Distribute Malware

Cybersecurity researchers have detailed the workings of a fully-featured malware loader dubbed PureCrypter that's being purchased by cyber criminals to deliver remote access trojans RATs and information stealers. "The loader is a .NET executable obfuscated with SmartAssembly and makes use of...

golang: math/big: uncontrolled memory consumption due to an unhandled overflow via Rat.SetString

A flaw was found in the big package of the math library in golang. The Rat.SetString could cause an overflow, and if left unhandled, it could lead to excessive memory use. This issue could allow a remote attacker to impact the availability of the system...

Researchers Find New Malware Attacks Targeting Russian Government Entities

An unknown advanced persistent threat APT group has been linked to a series of spear-phishing attacks targeting Russian government entities since the onset of the Russo-Ukrainian war in late February 2022. "The campaigns ... are designed to implant a Remote Access Trojan RAT that can be used to...

Integer Overflow or Wraparound

Overview std/math/big is a Go standard library package std/math/big Affected versions of this package are vulnerable to Integer Overflow or Wraparound. Go Vulnerability Report: Rat.SetString had an overflow issue that can lead to uncontrolled memory consumption. Remediation Upgrade std/math/big t...

Custom PowerShell RAT targets Germans seeking information about the Ukraine crisis

This blog post was authored by Hossein Jazi and Jérôme Segura Populations around the world—and in Europe in particular—are following the crisis in Ukraine very closely, and with events unfolding on a daily basis, people are hungry for information. Although all countries have reasons to be...

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 ...

Low-rent RAT Worries Researchers

For about the price of a cup of Starbucks latte, a hacker is renting out a remote access trojan designed to backdoor targeted networks. Dubbed as Dark Crystal RAT or DCRat, the malware is being peddled online to hackers in Russian by a lone rookie malware writer with a penchant for cut-rate...

Hackers Using PrivateLoader PPI Service to Distribute New NetDooka Malware

A pay-per-install PPI malware service known as PrivateLoader has been spotted distributing a "fairly sophisticated" framework called NetDooka, granting attackers complete control over the infected devices. "The framework is distributed via a pay-per-install PPI service and contains multiple parts...

NetDooka Framework Distributed via PrivateLoader Malware as Part of Pay-Per-Install Service

This report focuses on the components and infection chain ⁠of the NetDooka framework. Its scope ranges from the release of the first payload up until the release of the final RAT that is protected by a kernel driver...

State-backed hacking group from China is targeting the Russian military

In an unexpected turn of events, research has surfaced about a Chinese APT advanced persistent threat group targeting the Russian military in recent cyberattacks. Tracked as Bronze President, Mustang Panda, RedDelta, and TA416, the group has focused mainly on Southeast Asian targets—and more...

Cyberespionage APT Now Identified as Three Separate Actors

A threat group responsible for sophisticated cyberespionage attacks against U.S. utilities is actually comprised of three subgroups, all with their own toolsets and targets, that have been operating globally since 2018, researchers have found. TA410 is a cyberespionage umbrella group loosely link...

golang: math/big.Rat: may cause a panic or an unrecoverable fatal error if passed inputs with very large exponents

A flaw was found in Go, where it attempts to allocate excessive memory. This issue may cause panic or unrecoverable fatal error if passed inputs with very large exponents. The highest threat from this vulnerability is to system availability...

No-Joke Borat RAT Propagates Ransomware, DDoS

Attackers are using a newly released remote access trojan RAT to spread ransomware and distributed denial of service DDoS — in addition to the traditional RAT function of backdooring victims’ systems. Researchers at Cyble Research Labs discovered the RAT, which they dubbed Borat RAT because it us...

New PlugX variant “Talisman” used by famous Chinese APT

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here PlugX is a well-known malware family with samples dating back to as early as 2008. A Chinese state-backed threat actor, RedFoxtrot group, is discovered to use a new variant of the PlugX malware, Talisman. The threat actor grou...

'Purple Fox' Hackers Spotted Using New Variant of FatalRAT in Recent Malware Attacks

The operators of the Purple Fox malware have retooled their malware arsenal with a new variant of a remote access trojan called FatalRAT, while also simultaneously upgrading their evasion mechanisms to bypass security software. "Users' machines are targeted via trojanized software packages...

Chinese APT Combines Fresh Hodur RAT with Complex Anti-Detection

The Chinese advanced persistent threat APT Mustang Panda a.k.a. Temp.Hex, HoneyMyte, TA416 or RedDelta has upgraded its espionage campaign against diplomatic missions, research entities and internet service providers ISPs – largely in and around Southeast Asia. For one thing, the APT has deployed...

A week in security (March 14 – 20)

Last week on Malwarebytes Labs: Beware of this bogus and phishy “Instagram Support” email Meet Exotic Lily, access broker for ransomware and other malware peddlers Double header: IsaacWiper and CaddyWiper How to protect RDP Online Safety Bill’s provisions for “legal but harmful” content described...