Resubmissions

25/03/2025, 13:19

250325-qkkrrszps510

05/02/2025, 11:22

250205-ngk71strbx10

25/06/2024, 15:43

240625-s6cz6a1gnj10

25/06/2024, 15:17

240625-sn4p6axdma10

Analysis

  • max time kernel
    299s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    05/02/2025, 11:22

General

  • Target
    706F3EEC328E91FF7F66C8F0A2FB9B556325C153A329A2062DC85879C540839D.exe
  • Size 79KB
  • Sample250205-ngk71strbx
  • SHA256 706f3eec328e91ff7f66c8f0a2fb9b556325c153a329a2062dc85879c540839d
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\yHh8Ghp8e.README.txt

  • blackmatter

Ransom Note
  • ~+ * + ' BLACK | () .-.,='``'=. - o - '=/_ \ | * | '=._ | \ `=./`, ' . '=.__.=' `=' * + Matter + O * ' . >>> What happens? Your network is encrypted, and currently not operational. We need only money, after payment we will give you a decryptor for the entire network and you will restore all the data. >>> What data stolen? From your network was stolen 1000 GB of data. If you do not contact us we will publish all your data in our blog and will send it to the biggest mass media. Blog post link: http://blackmax7su6mbwtcyo3xwtpfxpm356jjqrs34y4crcytpw7mifuedyd.onion/72oJjilhMD/6d067a8741848166fa2ac1e69472280c >>> What guarantees? 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. If we do not give you decrypters or we do not delete your data, no one will pay us in the future, this does not comply with our goals. We always keep our promises. >> How to contact with us? 1. Download and install TOR Browser (https://www.torproject.org/). 2. Open http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/X3452I2VDTHM30QX >> Warning! Recovery recommendations. We strongly recommend you to do not MODIFY or REPAIR your files, that will damage them.
URLs
  • http://blackmax7su6mbwtcyo3xwtpfxpm356jjqrs34y4crcytpw7mifuedyd.onion/72oJjilhMD/6d067a8741848166fa2ac1e69472280c

  • http://supp24yy6a66hwszu2piygicgwzdtbwftb76htfj7vnip3getgqnzxid.onion/X3452I2VDTHM30QX

Signatures

  • BlackMatter Ransomware

    BlackMatter ransomware group claims to be Darkside and REvil succesor.

  • Blackmatter family
  • Renames multiple (165) files with added filename extension

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

  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 6 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Modifies Control Panel 3 IoCs
  • Modifies registry class 20 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 17 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\706F3EEC328E91FF7F66C8F0A2FB9B556325C153A329A2062DC85879C540839D.exe
    C:\Users\Admin\AppData\Local\Temp\706F3EEC328E91FF7F66C8F0A2FB9B556325C153A329A2062DC85879C540839D.exe dsrm -subtree -noprompt -c user"http://+:443"
    1⤵
    • Sets desktop wallpaper using registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Modifies Control Panel
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2272
    • C:\Windows\SysWOW64\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" /p C:\yHh8Ghp8e.README.txt
      2⤵
      • System Location Discovery: System Language Discovery
      • Opens file in notepad (likely ransom note)
      • Suspicious use of WriteProcessMemory
      PID:2892
      • C:\Windows\splwow64.exe
        C:\Windows\splwow64.exe 12288
        3⤵
        • Modifies registry class
        • Suspicious behavior: GetForegroundWindowSpam
        • Suspicious use of SetWindowsHookEx
        PID:2840
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1308

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        Cab2741.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\Cab2741.tmp
        • Size 70KB
        • SHA256 b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f
        • MD5 SHA1 SHA512 SSDEEP

        Tar2773.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\Tar2773.tmp
        • Size 181KB
        • SHA256 8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8
        • MD5 SHA1 SHA512 SSDEEP

        CloseRevoke.xps.yHh8Ghp8e

        • Path C:\Users\Admin\Documents\CloseRevoke.xps.yHh8Ghp8e
        • Size 850KB
        • SHA256 2081eee5125d0ad6c336def74a0b7fd15d2e5621b27ced1a9f4bcb32b20e541f
        • MD5 SHA1 SHA512 SSDEEP

        InitializeDisable.xps.yHh8Ghp8e

        • Path C:\Users\Admin\Documents\InitializeDisable.xps.yHh8Ghp8e
        • Size 700KB
        • SHA256 ffad0ac348cc2c2e6f8be94a2b80128be0e96d15a80d3f54387c7e89b465b3af
        • MD5 SHA1 SHA512 SSDEEP

        yHh8Ghp8e.README.txt

        • Path C:\yHh8Ghp8e.README.txt
        • Size 1KB
        • SHA256 74e29716d6211d4c26ab0c3184affef6f275bfbfab2ec4dd4fb776fb76065173
        • MD5 SHA1 SHA512

        memory/2272-0-0x0000000001FD0000-0x0000000002010000-memory.dmp