Analysis

  • max time kernel
    144s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 13:15

General

  • Target

    b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe

  • Size

    281KB

  • MD5

    45c66a2034297abfc6b5543dfbac04f2

  • SHA1

    21aea98d43c6d0aa86b8ee1777cc51cfae5a634f

  • SHA256

    b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9

  • SHA512

    a341910130e4a040f02405c553556851cddf6ac2396f7e0d38aa0c7a97894aa9dece5cb9a7ce323bb50f221cfbc27d29641a4ccdc4843af09f9f54a14e6c19ce

  • SSDEEP

    3072:auyDaJPZdL7cHeyf3XJ+rs+MlhxMMKe4uquK9RbPf65xfzW5ffXq3B1k48cV1JD2:auyWJDLwHzf8412Mebd36/fkfAB1pJd

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\b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe
    "C:\Users\Admin\AppData\Local\Temp\b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2168
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dwabypba\
      2⤵
        PID:2364
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rpzacybh.exe" C:\Windows\SysWOW64\dwabypba\
        2⤵
          PID:2932
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create dwabypba binPath= "C:\Windows\SysWOW64\dwabypba\rpzacybh.exe /d\"C:\Users\Admin\AppData\Local\Temp\b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2068
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description dwabypba "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2656
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start dwabypba
          2⤵
          • Launches sc.exe
          PID:2608
        • 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:2812
      • C:\Windows\SysWOW64\dwabypba\rpzacybh.exe
        C:\Windows\SysWOW64\dwabypba\rpzacybh.exe /d"C:\Users\Admin\AppData\Local\Temp\b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2460
        • 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:2704

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        14.2MB

        MD5

        d9cbf16d809f220d024c8ecf5329e03b

        SHA1

        8d8250f3f21a03241a67894015228edc36619bb6

        SHA256

        b08d1a635fa2fc4857f5131936af4d398f38f12caa7998e5da4440bbc78fe740

        SHA512

        e83dd352feee495232324713e31e6dbec01ce6f244f2add8abd1fa86b1925c7a9247eaf85fb320ca6eb31abda544ce1406793a784cfcc57c7315b264cdfa90ed

      • memory/2168-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2168-4-0x0000000000400000-0x0000000000869000-memory.dmp
        Filesize

        4.4MB

      • memory/2168-8-0x0000000000400000-0x0000000000869000-memory.dmp
        Filesize

        4.4MB

      • memory/2168-9-0x0000000000990000-0x0000000000A90000-memory.dmp
        Filesize

        1024KB

      • memory/2168-1-0x0000000000990000-0x0000000000A90000-memory.dmp
        Filesize

        1024KB

      • memory/2460-15-0x00000000008F0000-0x00000000009F0000-memory.dmp
        Filesize

        1024KB

      • memory/2460-16-0x0000000000400000-0x0000000000869000-memory.dmp
        Filesize

        4.4MB

      • memory/2704-35-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-49-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-10-0x00000000000E0000-0x00000000000F5000-memory.dmp
        Filesize

        84KB

      • memory/2704-19-0x00000000000E0000-0x00000000000F5000-memory.dmp
        Filesize

        84KB

      • memory/2704-20-0x00000000000E0000-0x00000000000F5000-memory.dmp
        Filesize

        84KB

      • memory/2704-21-0x00000000000E0000-0x00000000000F5000-memory.dmp
        Filesize

        84KB

      • memory/2704-23-0x00000000000E0000-0x00000000000F5000-memory.dmp
        Filesize

        84KB

      • memory/2704-24-0x0000000001A80000-0x0000000001C8F000-memory.dmp
        Filesize

        2.1MB

      • memory/2704-27-0x0000000001A80000-0x0000000001C8F000-memory.dmp
        Filesize

        2.1MB

      • memory/2704-28-0x0000000000180000-0x0000000000186000-memory.dmp
        Filesize

        24KB

      • memory/2704-31-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-34-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-13-0x00000000000E0000-0x00000000000F5000-memory.dmp
        Filesize

        84KB

      • memory/2704-47-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-50-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-54-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/2704-51-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/2704-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2704-48-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-46-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-45-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-44-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-43-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-55-0x0000000005830000-0x0000000005C3B000-memory.dmp
        Filesize

        4.0MB

      • memory/2704-42-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-41-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-40-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-39-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-38-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-37-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-36-0x0000000000190000-0x00000000001A0000-memory.dmp
        Filesize

        64KB

      • memory/2704-58-0x0000000005830000-0x0000000005C3B000-memory.dmp
        Filesize

        4.0MB

      • memory/2704-59-0x00000000004C0000-0x00000000004C7000-memory.dmp
        Filesize

        28KB