Analysis

  • max time kernel
    147s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    04/08/2024, 11:53

General

  • Target
    7b0f5d34e8021af4134dbc9b5a0119f8e2acf18ade91c5f2b2fd168daec0027b.exe
  • Size 147KB
  • Sample240804-n2kf8ayeng
  • SHA256 7b0f5d34e8021af4134dbc9b5a0119f8e2acf18ade91c5f2b2fd168daec0027b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\ashOWYJUH.README.txt

Ransom Note
  • >>>> You need to contact us soon! Our contact email: [email protected] >>>> Your data are stolen and encrypted >>>> Your personal DECRYPTION ID: D9AC5C30CE91307BC45756FEC54E3A07 >>>> All files on your computer have been encrypted. >>>> If you want to recover encrypted files, then contact us soon! >>>> We can decrypt 1-3 files (doc, xls, pdf, txt, jpeg) for free. You can attach them to your email. Databases, archives, backups are decrypted only after payment! >>>> What guarantees that we will not deceive you? We are not a politically motivated group and we do not need anything other than your money. If you pay, we will provide you the programs for decryption and we will delete your data. Life is too short to be sad. Be not sad, money, it is only paper. If we do not give you decrypters, or we do not delete your data after payment, then nobody will pay us in the future. Therefore to us our reputation is very important. We attack the companies worldwide and there is no dissatisfied victim after payment. >>>> You need to contact us soon! Our contact email: [email protected] >>>> Warning! Do not DELETE or MODIFY any files, it can lead to recovery problems! >>>> Warning! If you do not pay the ransom we will attack your company repeatedly again!

Signatures

  • Renames multiple (638) 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
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies Control Panel 2 IoCs
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7b0f5d34e8021af4134dbc9b5a0119f8e2acf18ade91c5f2b2fd168daec0027b.exe
    "C:\Users\Admin\AppData\Local\Temp\7b0f5d34e8021af4134dbc9b5a0119f8e2acf18ade91c5f2b2fd168daec0027b.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    PID:3924

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        BBBBBBBBBBB

        • Path C:\$Recycle.Bin\S-1-5-21-970747758-134341002-3585657277-1000\BBBBBBBBBBB
        • Size 129B
        • SHA256 4846029fc7cc90749df484c3135c14cbe6e37837037faf12aeb4de87b96ebdce
        • MD5 SHA1 SHA512

        ashOWYJUH.README.txt

        • Path C:\ashOWYJUH.README.txt
        • Size 1KB
        • SHA256 ff29789851b9b3df761ea1e29224bbb013d4367daccf63b4cb92d3c78a87dc58
        • MD5 SHA1 SHA512

        DDDDDDDDDDD

        • Path F:\$RECYCLE.BIN\S-1-5-21-970747758-134341002-3585657277-1000\DDDDDDDDDDD
        • Size 129B
        • SHA256 8644ffaa6c9ebf07094352f052b81aceb240ae069e1f25f5eb72c74a6a7c962d
        • MD5 SHA1 SHA512

        memory/3924-0-0x00000000008D0000-0x00000000008E0000-memory.dmp

        memory/3924-1-0x00000000008D0000-0x00000000008E0000-memory.dmp

        memory/3924-2-0x00000000008D0000-0x00000000008E0000-memory.dmp