Analysis

  • max time kernel
    141s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:20

General

  • Target

    6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe

  • Size

    170KB

  • MD5

    f5fd4237e550503a8eab51ae35f147b6

  • SHA1

    869d44d58fb734b3692500dae1f42f0d6e3b3434

  • SHA256

    6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd

  • SHA512

    32327ca44e09d46ba8e656124f7480979b3eeb3769a94259d536a5223b2c532bd21654d8b4551d26265903f5c2be87a8da73d4571eee6fd9bfc887ea9e88350f

  • SSDEEP

    1536:Js5KSNeteSXSI4nZ7OyP8p7+C1xIhQ6M3dfUMJn325pDedDT50ZXXKVXRKX:e5ScSHCO1p7hiO4AI1edHK56lR

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
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 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 1 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 WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe
    "C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2172
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\yfuugodv\
      2⤵
        PID:2948
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xateenoo.exe" C:\Windows\SysWOW64\yfuugodv\
        2⤵
          PID:2596
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create yfuugodv binPath= "C:\Windows\SysWOW64\yfuugodv\xateenoo.exe /d\"C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2628
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description yfuugodv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start yfuugodv
          2⤵
          • Launches sc.exe
          PID:2484
        • 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\yfuugodv\xateenoo.exe
        C:\Windows\SysWOW64\yfuugodv\xateenoo.exe /d"C:\Users\Admin\AppData\Local\Temp\6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1680
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2516

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      Impair Defenses

      2
      T1562

      Disable or Modify Tools

      1
      T1562.001

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\xateenoo.exe
        Filesize

        13.2MB

        MD5

        8d55a9229b274c3852a58072e7daf8d1

        SHA1

        a4e7796015aa3d9e03cb46085425a4fa236de87a

        SHA256

        5bcaa1ec1183aef664a9947bd1bdf9ad6ea14bca9530c411c55adb23619db5b4

        SHA512

        3cd4d869708d14b8d1f720a85e7c72bddc5add42e85e798b480db8564d75d0ccde8e7e43c1662c0a60ca96018fd310e8591aa61f96260cec781bc9e2a3bb5836

      • memory/1680-14-0x0000000000570000-0x0000000000670000-memory.dmp
        Filesize

        1024KB

      • memory/1680-15-0x0000000000400000-0x0000000000474000-memory.dmp
        Filesize

        464KB

      • memory/2172-4-0x0000000000400000-0x0000000000474000-memory.dmp
        Filesize

        464KB

      • memory/2172-3-0x00000000001B0000-0x00000000001C3000-memory.dmp
        Filesize

        76KB

      • memory/2172-7-0x0000000000400000-0x0000000000474000-memory.dmp
        Filesize

        464KB

      • memory/2172-1-0x00000000002D0000-0x00000000003D0000-memory.dmp
        Filesize

        1024KB

      • memory/2516-36-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-39-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2516-17-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2516-19-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2516-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2516-22-0x0000000001980000-0x0000000001B8F000-memory.dmp
        Filesize

        2.1MB

      • memory/2516-25-0x0000000001980000-0x0000000001B8F000-memory.dmp
        Filesize

        2.1MB

      • memory/2516-26-0x0000000000110000-0x0000000000116000-memory.dmp
        Filesize

        24KB

      • memory/2516-29-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-32-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-33-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-34-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-12-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2516-37-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-35-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-40-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-9-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2516-42-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-44-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-45-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-46-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-49-0x0000000000220000-0x0000000000225000-memory.dmp
        Filesize

        20KB

      • memory/2516-48-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-47-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-43-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-41-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-38-0x0000000000120000-0x0000000000130000-memory.dmp
        Filesize

        64KB

      • memory/2516-52-0x0000000000220000-0x0000000000225000-memory.dmp
        Filesize

        20KB

      • memory/2516-53-0x00000000056A0000-0x0000000005AAB000-memory.dmp
        Filesize

        4.0MB

      • memory/2516-56-0x00000000056A0000-0x0000000005AAB000-memory.dmp
        Filesize

        4.0MB

      • memory/2516-57-0x0000000000240000-0x0000000000247000-memory.dmp
        Filesize

        28KB

      • memory/2516-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB