Mealybug

Threat Actor Profile Updated 24 days ago
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Mealybug, a cybercrime group also known as TA542, has been operating the Emotet malware family since 2014. In recent years, Mealybug has significantly enhanced its malicious activities by updating the Emotet malware to a 64-bit architecture and implementing multiple new obfuscations to protect their modules. Near the end of 2022, the group began experimenting with malicious LNK and XLL files, as they sought a new attack vector that could match the effectiveness of VBA macros. Despite facing challenges, Mealybug has managed to update and improve all existing modules multiple times. In an effort to evade detection and monitoring from the computer security industry and researchers, Mealybug has implemented robust protective measures. The botnet was widely disseminating Spammer modules, which were considered valuable for Mealybug as they were historically used only on machines deemed safe by them. Additionally, the group created several new modules to enhance their capabilities, including those that collect data and contain anti-tracking and anti-analysis tricks. This development significantly improved Mealybug's ability to differentiate between real victims and malware researchers' activities or sandboxes. The disabling of Emotet's main attack vector by authorities prompted Mealybug to explore new ways to compromise their targets. To remain profitable and prevalent, Mealybug introduced multiple new modules and improved its implementation of various randomization techniques. Notably, these include the randomization of order of structure members and instructions that calculate constants. As a result, Mealybug continues to pose a significant threat in the cybersecurity landscape, demonstrating adaptability and resilience in response to countermeasures.
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Possible Aliases / Cluster overlaps
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IDVotesProfile Description
Ta542
2
TA542, also known as Mealybug or Mummy Spider, is a notable threat actor in the cybersecurity landscape that operates the Emotet malware family. Active since 2014, this group has evolved the initial banking Trojan into a sophisticated and profitable malware delivery vehicle. The group's operations a
Miscellaneous Associations
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Malware
Cybercrime
Associated Malware
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IDTypeVotesProfile Description
EmotetUnspecified
3
Emotet is a notorious malware that has been active for over a decade, known for its ability to infiltrate and manipulate email accounts. It tricks individuals into downloading infected files or clicking on malicious links, thus spreading its influence. It was a major player in the malware delivery b
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Source Document References
Information about the Mealybug Threat Actor was read from the documents corpus below. This display is limited to 20 results, create a free account to see more
SourceCreatedAtTitle
MITRE
a year ago
The Evolution of Emotet: From Banking Trojan to Threat Distributor
ESET
a year ago
What’s up with Emotet? | WeLiveSecurity
CERT-EU
a year ago
Research follows comeback of infamous botnet Emotet