RedPeanut - A Small RAT Developed In .Net Core 2 And Its Agent In .Net 3.5/4.0

RedPeanut is a small RAT developed in .Net Core 2 and its agent in .Net 3.5 / 4.0. RedPeanut code execution is based on shellcode generated with DonutCS. It is therefore a hybrid, although developed in .Net it does not rely solely on the Assembly.Load. This increases the detection surface, but...

Double Vision: Stealthy Malware Dropper Delivers Dual RATs

A newly discovered initial-stage malware dropper has been discovered sneaking by antivirus products, with the ultimate goal of delivering a double-pronged whammy of RevengeRAT and WSH RAT payloads onto targeted Windows machines. A FortiGuard Labs team recently captured a sample file that had been...

Orcus RAT Author Charged in Malware Scheme

In July 2016, KrebsOnSecurity published a story identifying a Toronto man as the author of the Orcus RAT, a software product that’s been marketed on underground forums and used in countless malware attacks since its creation in 2015. This week, Canadian authorities criminally charged him with...

Threat Roundup for November 1 to November 8

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between Nov. 1 and Nov. 8. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics,...

Calypso APT Emerges from the Shadows to Target Governments

A newly discovered APT group, dubbed Calypso after a custom malware RAT that it uses, has been targeting state institutions in six different countries since 2016. Government organizations in India 34 percent, Brazil and Kazakhstan 18 percent respectively, Russia and Thailand 12 percent respective...

Mahalo FIN7: Responding to the Criminal Operators’ New Tools and Techniques

During several recent incident response engagements, FireEye Mandiant investigators uncovered new tools in FIN7’s malware arsenal and kept pace as the global criminal operators attempted new evasion techniques. In this blog, we reveal two of FIN7’s new tools that we have called BOOSTWRITE and...

A week in security (September 30 – October 6)

Last week on Malwarebytes Labs, Malwarebytes renewed its pledge to fight stalkerware for National Cybersecurity Awareness NCSA and Domestic Violence Awareness Month. We also looked into what security orchestration is and reported about partnering with security firm, HYAS, to determine the...

Open Document format creates twist in maldoc landscape

By Warren Mercer and Paul Rascagneres. Introduction Cisco Talos recently observed attackers changing the file formats they use in an attempt to thwart common antivirus engines. This can happen across other file formats, but today, we are showing a change of approach for an actor who has deemed...

Dtrack RAT is Behind Virulent ATM-Espionage Campaign

An espionage malware called Dtrack – and a related variant, ATMDtrack – has been traced back to the notorious North Korea-linked Lazarus Group APT. Both have been identified this month targeting victims in India. According to researcher Konstantin Zykov of Kaspersky, researchers first uncovered...

More U.S. Utility Firms Targeted in Evolving LookBack Spearphishing Campaign

A spearphishing campaign, first spotted in July targeting three U.S. utility companies with a new malware variant, has evolved its tactics and extended its targeting to include nearly 20 companies. The campaign was first discovered in phishing emails, sent between July 19 and 25, which targeted...

Hello! My name is Dtrack

Our investigation into the Dtrack RAT actually began with a different activity. In the late summer of 2018, we discovered ATMDtrack, a piece of banking malware targeting Indian banks. Further analysis showed that the malware was designed to be planted on the victim's ATMs, where it could read and...

IRS Emails Promise a Refund But Deliver Botnet Recruitment

U.S. taxpayers are being offered fake refunds in the latest wave of phishing emails, which ultimately deliver an payload that adds the target machine to the multifunctional Amadey botnet. Amadey is a relatively new botnet, first noted late in Q1 of 2019, according to Milo Salvia, security...

Smominru Botnet Indiscriminately Hacked Over 90,000 Computers Just Last Month

Insecure Internet-connected devices have aided different types of cybercrime for years, most common being DDoS and spam campaigns. But cybercriminals have now shifted toward a profitable scheme where botnets do not just launch DDoS or spam—they mine cryptocurrencies as well. Smominru, an infamous...

New social engineering toolkit draws inspiration from previous web campaigns

Some of the most common web threats we track have a social engineering component. Perhaps the more popular ones are those encountered via malvertising, or hacked websites that push fraudulent updates. We recently identified a website compromise with a scheme we had not seen before; it's part of a...

Threat Source newsletter (Aug. 22)

Newsletter compiled by Jon Munshaw. Welcome to this week’s Threat Source newsletter — the perfect place to get caught up on all things Talos from the past week. What’s old is new again. Our research this week centers around a series of long-lasting threat actors and malware that have been given n...

UPDATE: Merlin v0.8.0

PenTestIT RSS Feed A week ago an update - Merlin v0.8.0 was released. There was a brief mention about Merlin in my post titled - List of Open Source C2 Post-Exploitation Frameworks. This new version includes several new features to increase Operations Security OPSEC and usability. One of the more...

Dangerous Cryptomining Worm Racks Up 850K Infections, Self-Destructs

A French and U.S. law-enforcement effort has neutralized 850,000 infections by a cryptomining worm known as Retadup, by causing the threat to destroy itself. The worm has been distributing the malicious XMRig cryptocurrency miner to computers running the Windows operating system, mostly in Latin...

RAT Ratatouille: Backdooring PCs with leaked RATs

By Edmund Brumaghin and Holger Unterbrink. Executive summary Orcus RAT and RevengeRAT are two of the most popular remote access trojans RATs in use across the threat landscape. Since its emergence in 2016, various adversaries used RevengeRAT to attack organizations and individuals around the worl...

Popular Malware Families Using 'Process Doppelgänging' to Evade Detection

The fileless code injection technique called Process Doppelgänging is actively being used by not just one or two but a large number of malware families in the wild, a new report shared with The Hacker News revealed. Discovered in late 2017, Process Doppelgänging is a fileless variation of Process...

Threat Roundup for June 14 to June 21

Today, Talos is publishing a glimpse into the most prevalent threats we've observed between June 14 and June 21. As with previous roundups, this post isn't meant to be an in-depth analysis. Instead, this post will summarize the threats we've observed by highlighting key behavioral characteristics...