GuLoader

Malware updated 2 months ago (2024-09-11T16:17:44.339Z)
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GuLoader is a potent malware that has been causing significant cybersecurity concerns. It operates by infecting systems through suspicious downloads, emails, or websites and then proceeds to exploit the system, often stealing personal information, disrupting operations, or holding data hostage for ransom. In early 2023, a GuLoader sample was encountered which initially had zero VirusTotal detections, indicating its sophisticated stealth capabilities. The malware uses advanced techniques like ciphertext splitting and control flow obfuscation to enhance its elusiveness, making it harder to detect and block. The GuLoader authors have employed various methods to further obfuscate their Command and Control (C2) configuration, adding another layer of complexity to this malicious software. A detailed analysis of the GuLoader sample revealed anti-analysis instructions, demonstrating the lengths the authors went to ensure their malware remains undetected. Additionally, GuLoader has been seen paired with other malware loaders like Remcos, creating more complex attack chains that are challenging to identify and disrupt. Technical analysis of GuLoader has shed light on the process of locating and extracting C2 configurations from various malware families. However, the evolution of the malware's techniques has defeated previous approaches to extracting GuLoader's configuration. This malware is encrypted using the NSIS Crypter, as indicated in the NSIS Script and Extracting GuLoader Shellcode. This encryption provides an additional layer of security, making it even more difficult for cybersecurity professionals to analyze and neutralize the threat posed by GuLoader.
Description last updated: 2024-09-11T16:16:03.886Z
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Possible Aliases / Cluster overlaps
It's hard to track cluster overlaps and naming conventions between vendors, so here are some possible overlapping names / profiles you also may want to look at. Create a free account to see the source evidence for each alias, and help fix any errors.
Alias DescriptionVotes
Cloudeye is a possible alias for GuLoader. Cloudeye, also known as GuLoader, is a sophisticated malware that has been active for over three years and continues to evolve. First spotted in late 2019, it is an advanced shellcode-based malware downloader used to distribute a range of payloads, such as information stealers, while incorporating n
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Formbook is a possible alias for GuLoader. Formbook is a type of malware, malicious software designed to exploit and damage computer systems. It infects systems through suspicious downloads, emails, or websites and can steal personal information, disrupt operations, or hold data hostage for ransom. Formbook has been linked with other forms o
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Amadey is a possible alias for GuLoader. Amadey is a form of malware, a malicious software designed to exploit and damage computer systems. This particular malware is distributed via the Amadey loader, which can be disseminated through phishing emails or downloads from compromised sites. It has been observed that the individual behind the
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The Protector is a possible alias for GuLoader. "The Protector" is a malware identified as the Visual Basic Script (VBS) version of GuLoader. This malicious software, designed to exploit and damage computer systems, infiltrates through suspicious downloads, emails, or websites without the user's knowledge. Once inside, it can steal personal infor
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Miscellaneous Associations
Other elements of context that could aid in the identification of relevance
Malware
Remcos
Downloader
Rat
Phishing
Windows
Loader
Ransomware
Antivirus
Payload
Crypter
Vulnerability
Malware Loader
Exploit
Shellcode
Decoy
Encryption
Sandbox
Botnet
WinRAR
Analyst Notes & Discussion
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Associated Malware
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Alias DescriptionAssociation TypeVotes
The Guloader Shellcode Malware is associated with GuLoader. GuLoader shellcode is a type of malware that utilizes various techniques to infiltrate systems, disrupt operations, and potentially steal personal information. The malicious software has been observed in encrypted forms such as the GuLoader VBScript and NSIS, both identified with unique MD5 hashes. Unspecified
4
The Agent Tesla Malware is associated with GuLoader. Agent Tesla is a well-known malware that primarily targets systems through phishing attacks, exploiting an outdated Microsoft Office vulnerability (CVE-2017-11882). This malicious software is designed to infiltrate computer systems, often without the user's knowledge, and can steal personal informatUnspecified
2
The NETWIRE Malware is associated with GuLoader. NetWire is a type of malware, specifically a remote access trojan (RAT), that has been utilized for various malicious activities since at least 2014. Initially promoted as a legitimate tool for managing Windows computers remotely, NetWire was quickly adopted by cybercriminals and used in phishing atUnspecified
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The Emotet Malware is associated with GuLoader. Emotet is a notorious malware, short for malicious software, that is designed to exploit and damage computers or devices. It can infiltrate systems through suspicious downloads, emails, or websites, often unbeknownst to the user, with the potential to steal personal information, disrupt operations, Unspecified
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The Guloader Vbscript Malware is associated with GuLoader. GuLoader VBScript is a sophisticated form of malware designed to infiltrate and exploit computer systems. This malicious software can access systems through suspicious downloads, emails, or websites, often without the user's knowledge. Once inside, it has the potential to steal personal information,Unspecified
2
Associated Threat Actors
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Alias DescriptionAssociation TypeVotes
The Darkme Threat Actor is associated with GuLoader. DarkMe is a threat actor group, also known as DarkCasino or Water Hydra, that has been actively executing large-scale cyberattacks since 2022. The group primarily uses a Visual Basic spy Trojan, also named DarkMe, in its operations. This Trojan was developed by the group in 2021 and has been continuUnspecified
3
Associated Vulnerabilities
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Alias DescriptionAssociation TypeVotes
The CVE-2017-11882 Vulnerability is associated with GuLoader. CVE-2017-11882 is a significant software vulnerability, specifically a flaw in the design or implementation of Microsoft's Equation Editor. This vulnerability has been exploited by various threat actors to create malicious RTF files, most notably by Chinese state-sponsored groups using the "Royal RoUnspecified
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Source Document References
Information about the GuLoader Malware was read from the documents corpus below. This display is limited to 20 results, create a free account to see more
PreviewSource LinkCreatedAtTitle
Recorded Future
2 months ago
Unit42
10 months ago
SANS ISC
5 months ago
Flashpoint
6 months ago
DARKReading
7 months ago
Securityaffairs
7 months ago
Fortinet
7 months ago
CERT-EU
8 months ago
CERT-EU
8 months ago
Checkpoint
9 months ago
CERT-EU
10 months ago
CERT-EU
a year ago
BankInfoSecurity
a year ago
CERT-EU
a year ago
CERT-EU
a year ago
CERT-EU
a year ago
CERT-EU
a year ago
Checkpoint
a year ago
Checkpoint
a year ago
DARKReading
a year ago