Analysis

  • max time kernel
    96s
  • max time network
    114s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/03/2024, 04:59

General

  • Target
    240118-29gxysfhd8.exe
  • Size 147KB
  • Sample240304-fmrb8aae2y
  • SHA256 2a9e966a71b0eee58ea91f81e2ace3484bc6c23e9d55cd1a6280a8992fdca07a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\RlfdcQhp8.README.txt

Ransom Note
  • Ransomware (dyamond) All of your files have been encrypted and stolen by us. We have utilized advanced AES and ECC algorithms to accomplish this. Without our decryption service, it is impossible for anyone to recover your files. To initiate the recovery process, you will need to follow these steps. We want to clarify that we are not driven by any political motives and our sole intention is to obtain monetary compensation. If you choose to pay, we will provide you with the necessary decryption software and ensure the destruction of the stolen data. Your Personal ID : 5B74E5A5CA3D89EAE24279DFE415E736 To guarantee our commitment, you are required to send us an unimportant file that is less than 1 MG in size. We will decrypt this file as proof of our capabilities. If we fail to deliver the decryption software or delete the stolen data, we understand that no one will pay us in the future, and we are committed to upholding our promise. To contact us, please use the following email address: [email protected] In the event that you do not receive a response within 24 hours, please contact us through this alternative email: [email protected] Remember to include your personal ID in the subject of the email. We would like to issue a few warnings: 1. Avoid engaging with recovery companies, as they are merely intermediaries seeking to profit from your situation and deceive you. They often negotiate with us secretly, purchase decryption software, and sell it to you at exorbitant prices, or they may even scam you outright. 2. It is crucial not to delay for an extended period. The sooner you make the payment, the lower the price will be. 3. Do not delete or modify any encrypted files, as doing so will complicate the decryption process.

Signatures

  • Renames multiple (576) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\240118-29gxysfhd8.exe
    "C:\Users\Admin\AppData\Local\Temp\240118-29gxysfhd8.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:4952

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        FFFFFFFFFFF

        • Path C:\$Recycle.Bin\S-1-5-21-566096764-1992588923-1249862864-1000\FFFFFFFFFFF
        • Size 129B
        • SHA256 b431a2a5e5897ba1a9773c4da65adca81538c4e9133ac4ad6458b57612133ccd
        • MD5 SHA1 SHA512

        RlfdcQhp8.README.txt

        • Path C:\RlfdcQhp8.README.txt
        • Size 1KB
        • SHA256 fb8b94acc19453f223a75771a9a3b76918e9ba760dff646eef63ae8a3454e5e2
        • MD5 SHA1 SHA512

        DDDDDDDDDDD

        • Path F:\$RECYCLE.BIN\S-1-5-21-566096764-1992588923-1249862864-1000\DDDDDDDDDDD
        • Size 129B
        • SHA256 fa617e404bdb552f808cfc24736448092ea340367bbc8b219759ce0171735732
        • MD5 SHA1 SHA512

        memory/4952-0-0x0000000000E20000-0x0000000000E30000-memory.dmp

        memory/4952-1-0x0000000000E20000-0x0000000000E30000-memory.dmp

        memory/4952-2-0x0000000000E20000-0x0000000000E30000-memory.dmp