Introduction
Credential stealing malware is commonly observed in the landscape of cyber attacks today. Zscaler ThreatLabz team has discovered many new types of stealer malwares across different attack campaigns. Stealers are malicious programs that threat actors use to collect sensitive information with various techniques including keylogging, cookie stealing, and sending stolen information to the Command and Control Server. …
Remcos RAT (Remote Access Trojan) was originally designed as a professional tool to remotely control computers. Remcos RAT is recognized as a malware family because it has been abused by hackers to secretly control victims’ devices since its first version was published on July 21, 2016.…
LOADOUT is an obfuscated VBScript-based downloader which harvests extensive information from the infected system. The harvested information is then sent to a command-and-control (C2) server. C2 server responses for LOADOUT infections delivered GRIFFON, a JavaScript-based downloader which retrieves additional JavaScript modules using HTTP or DNS and executes them in memory.…
As Russia’s invasion of Ukraine continues, new wiper malware has surfaced attacking Ukrainian infrastructure. Caddywiper was first detected on March 14, 2022. It destroys user data, partitions information from attached drives, and has been spotted on several dozen systems in a limited number of organizations. CaddyWiper has been deployed via GPO, suggesting the attackers had initially compromised the target’s Active Directory server.…
In this intrusion from December 2021, the threat actors utilized IcedID as the initial access vector. IcedID is a banking trojan that first appeared in 2017, usually, it is delivered via malspam campaigns and has been widely used as an initial access vector in multiple ransomware intrusions.…
Morphisec Labs has detected a new wave of Remcos trojan infection. The theme of the phishing emails is again financial, this time as payment remittances sent from financial institutions. The attacker lures a user to open a malicious Excel file that contains “confidential information” which starts the infection chain.…
By James Haughom, Antonis Terefos, Jim Walter, Jeff Cavanaugh, Nick Fox, and Shai Tilias
OverviewIn a recent IR engagement, our team happened upon a rather interesting packer (aka crypter or obfuscator) that was ultimately utilized to construct and execute shellcode responsible for downloading a Cobalt Strike Beacon.…
By Securonix Threat Labs, Threat Research
IntroductionThe Securonix Threat Research team has identified a currently unpatched zero-day vulnerability in Spring Core, a widely used Java-based platform with cross platform support. Early details claim that the bug would allow full remote code execution (RCE) to affected systems.…
During the past month, FortiEDR detected a campaign by Deep Panda, a Chinese APT group. The group exploited the infamous Log4Shell vulnerability in VMware Horizon servers. The nature of targeting was opportunistic insofar that multiple infections in several countries and various sectors occurred on the same dates.…
By Asheer Malhotra and Justin Thattil with contributions from Kendall McKay.
Cisco Talos has observed a new Transparent Tribe campaign targeting Indian government and military entities. While the actors are infecting victims with CrimsonRAT, their well-known malware of choice, they are also using new stagers and implants.…This post describes the technical analysis of a new campaign detected by Intezer’s research team, which initiates attacks with a phishing email that uses conversation hijacking to deliver IcedID.
The underground economy is constantly evolving with threat actors specializing in specific fields. One field that has bloomed in the last few years is initial access brokers.…
In late January 2022, ThreatLabz identified an updated version of Conti ransomware as part of the global ransomware tracking efforts. This update was released prior to the massive leak of Conti source code and chat logs on Februrary 27, 2022. The leaks were published by a Ukrainian researcher after the invasion of Ukraine.…
Malicious email and phishing scams are usually topical and follow a pattern of current events, and they typically are crafted around calendar and/or trending issues as attackers realize that victims are interested in all things relevant to the moment. Threat actors are aware that not all recipients will bite, but some will, hence the origin of the term “phishing.”…
We recently discovered an APT campaign we are calling Operation Dragon Castling. The campaign is targeting what appears to be betting companies in South East Asia, more specifically companies located in Taiwan, the Philippines, and Hong Kong. With moderate confidence, we can attribute the campaign to a Chinese speaking APT group, but unfortunately cannot attribute the attack to a specific group and are not sure what the attackers are after.…
A Cobalt Strike Cybercrime Syndicate and the Ransomware Hackers’ Favorite Weapon
On March 9, the Cybersecurity and Infrastructure Security Agency (CISA) and the U.S. Secret Service issued an updated alert about the Conti ransomware group, encouraging organizations to review their advisory and apply the recommended mitigations.…
This is the story of piecing together information and research leading to the discovery of one of the largest botnet-as-a-service cybercrime operations we’ve seen in a while. This research reveals that a cryptomining malware campaign we reported in 2018, Glupteba malware, significant DDoS attacks targeting several companies in Russia, including Yandex, as well as in New Zealand, and the United States, and presumably also the TrickBot malware were all distributed by the same C2 server.…
Since the beginning of this year, Avast has protected more than 2,000 customers from this password stealer.
Avast researchers have found password stealer malware, disguised as a private Fortnite server, where users can meet for a private match, and use skins for free. The malware is being heavily propagated on communications platform Discord.…
The ASEC analysis team has recently discovered BitRAT which is being distributed via webhards. Because the attacker disguised the malware as Windows 10 license verification tool from the development stage, users who download illegal crack tools from webhard and install it to verify Windows license are at risk of having BitRAT installed into their PC.…
In December 2021, we observed an adversary exploiting the Microsoft Exchange ProxyShell vulnerabilities to gain initial access and execute code via multiple web shells. The overlap of activities and tasks was remarkably similar to that observed in our previous report, “Exchange Exploit Leads to Domain Wide Ransomware“.…