DCSrv

Malware Profile Updated 3 months ago

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DCSrv is a variant of ransomware developed by the threat group known as Moses Staff. According to research conducted by the Cybereason Nocturnus team, DCSrv was discovered as part of the Moses Staff arsenal, alongside other tools such as PyDCrypt and StrifeWater. The malware disguises itself as the legitimate "svchost.exe" process and once executed, it blocks all access to the computer and encrypts all volumes using DiskCryptor, a legitimate open-source encryption utility. PyDCrypt, another tool used by Moses Staff, is written in Python and compiled using PyInstaller. Its main function is to spread across networks, infecting other computers, and ensuring that the primary payload, DCSrv, is executed correctly. Once PyDCrypt has infected a system, it passes its parameters, including an encryption key, to DCSrv for execution. This standard execution chain was observed in the analysis of the malware's deobfuscated code. The leaked data related to these operations suggest that Moses Staff has been conducting hacking operations against targeted organizations, exfiltrating files using their custom tools. The group's tactics, techniques, and procedures (TTPs) involve the use of PyDCrypt, DCSrv, and StrifeWater to infiltrate systems, disrupt operations, and potentially hold data for ransom. As such, understanding these tools and their operation can aid in the development of effective defensive strategies.

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ID	Votes	Profile Description

Miscellaneous Associations

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Encryption

Malware

Payload

Cybereason

Ransomware

Rat

Trojan

Associated Malware

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ID	Type	Votes	Profile Description
PyDCrypt	Unspecified	2	PyDCrypt is a malicious software (malware) variant deployed by the Moses Staff group, primarily targeting Israeli companies. The malware is written in Python and built with PyInstaller, designed to infect other computers on a network and execute the main payload, DCSrv. It is typically used in the l
StrifeWater	Unspecified	2	StrifeWater is a stealthy Remote Access Trojan (RAT) used in targeted ransomware attacks, primarily deployed by the Iranian APT group, Moses Staff. This malware has been identified as a key tool for initial infiltration and reconnaissance on compromised targets, with various capabilities including l
svchost.exe	Unspecified	1	Svchost.exe is a malware that exploits and damages computer systems by injecting malicious code into various processes. This harmful program can infiltrate your system through suspicious downloads, emails, or websites, often unbeknownst to the user. Once inside, it can steal personal information, di

Associated Threat Actors

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ID	Type	Votes	Profile Description
Moses Staff	Unspecified	2	Moses Staff, an Iranian Advanced Persistent Threat (APT) group, has emerged as a significant cybersecurity threat. The Cybereason Nocturnus Team has been monitoring the activities of this group since 2021, and it has been linked to several major ransomware-style attacks. Initially categorized as hac

Associated Vulnerabilities

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ID	Type	Votes	Profile Description
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Source Document References

Information about the DCSrv Malware was read from the documents corpus below. This display is limited to 20 results, create a free account to see more

Source	CreatedAt	Title
Securelist	9 months ago	A hack in hand is worth two in the bush
MITRE	a year ago	StrifeWater RAT: Iranian APT Moses Staff Adds New Trojan to Ransomware Operations
MITRE	a year ago	Uncovering MosesStaff techniques: Ideology over Money - Check Point Research