Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/03/2024, 09:31

General

  • Target

    ded6c7b76f7807e102b6cf167e23ac66.exe

  • Size

    11.2MB

  • MD5

    ded6c7b76f7807e102b6cf167e23ac66

  • SHA1

    4011583cb42fedee6663e34ca1930c8785935a75

  • SHA256

    7e4daedee73d2c6f9f78a81907713020b2cfa818e1b2a4836c44e8e8d7276be8

  • SHA512

    4fd2339f4590f8420a9ebf0c56ab498587fd31fde057cf31c880b95d011f5f1e6212a9c1669d6448245fc91f86a18da7d3c137f7152dc3bed97c13d2860556e8

  • SSDEEP

    24576:yUqa71YB5DHlommmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmX:yF15

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 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).

  • Program crash 2 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ded6c7b76f7807e102b6cf167e23ac66.exe
    "C:\Users\Admin\AppData\Local\Temp\ded6c7b76f7807e102b6cf167e23ac66.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:348
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zycpedss\
      2⤵
        PID:4160
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jcuqozn.exe" C:\Windows\SysWOW64\zycpedss\
        2⤵
          PID:5028
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zycpedss binPath= "C:\Windows\SysWOW64\zycpedss\jcuqozn.exe /d\"C:\Users\Admin\AppData\Local\Temp\ded6c7b76f7807e102b6cf167e23ac66.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4780
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zycpedss "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zycpedss
          2⤵
          • Launches sc.exe
          PID:1520
        • 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:4712
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 348 -s 656
          2⤵
          • Program crash
          PID:4008
      • C:\Windows\SysWOW64\zycpedss\jcuqozn.exe
        C:\Windows\SysWOW64\zycpedss\jcuqozn.exe /d"C:\Users\Admin\AppData\Local\Temp\ded6c7b76f7807e102b6cf167e23ac66.exe"
        1⤵
        • Sets service image path in registry
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2648
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Deletes itself
          PID:4544
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2648 -s 516
          2⤵
          • Program crash
          PID:688
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 348 -ip 348
        1⤵
          PID:4808
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2648 -ip 2648
          1⤵
            PID:4936

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            10.7MB

            MD5

            0464e9bfbaa260dfa7f3325dcae8a30b

            SHA1

            ad47bc39da4f9bb3d38f4551312e5ebe52f3bc24

            SHA256

            fb8c6bb5eb98753ce1ecc266a92df6e8cc21cb50eb95ebe080fad3728fc421ea

            SHA512

            3d2aea272b832508b5cd897ff5f06d7a5363592119c90b9b243a85a6506c3832c7ab2cba1c8ba0c902ac7c920a1205c61f631cbc8c21ead77c65ad946a67a5af

          • memory/348-2-0x00000000004F0000-0x0000000000503000-memory.dmp

            Filesize

            76KB

          • memory/348-3-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/348-9-0x00000000004F0000-0x0000000000503000-memory.dmp

            Filesize

            76KB

          • memory/348-8-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/348-1-0x0000000000570000-0x0000000000670000-memory.dmp

            Filesize

            1024KB

          • memory/2648-17-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/2648-11-0x0000000000720000-0x0000000000820000-memory.dmp

            Filesize

            1024KB

          • memory/2648-12-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/4544-10-0x00000000004E0000-0x00000000004F5000-memory.dmp

            Filesize

            84KB

          • memory/4544-15-0x00000000004E0000-0x00000000004F5000-memory.dmp

            Filesize

            84KB

          • memory/4544-16-0x00000000004E0000-0x00000000004F5000-memory.dmp

            Filesize

            84KB

          • memory/4544-18-0x00000000004E0000-0x00000000004F5000-memory.dmp

            Filesize

            84KB