Analysis

  • max time kernel
    151s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-04-2024 19:12

General

  • Target

    f1b843cc2d7e3ff9331102932f909119_JaffaCakes118.exe

  • Size

    14.5MB

  • MD5

    f1b843cc2d7e3ff9331102932f909119

  • SHA1

    89981f7f7f6145380929ec8a16a24a0e7d5620d1

  • SHA256

    3f6b6baa3603a5cbe9eea30bc37a5cd7b17132926cc057b947acf6fdd0c01635

  • SHA512

    f414671e71039a0d369d6e113511a412fa2a13115078ed07790dfaee16a4149a1775de478b16bf2742a9218bbd348f200b92bfbb4dbb4bb8cb3b975142ff8096

  • SSDEEP

    24576:tEqa7lYB5DHlommmm2mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmW:tVl5

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\f1b843cc2d7e3ff9331102932f909119_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f1b843cc2d7e3ff9331102932f909119_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4656
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ejwgcusw\
      2⤵
        PID:1920
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\neexnmnb.exe" C:\Windows\SysWOW64\ejwgcusw\
        2⤵
          PID:4632
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ejwgcusw binPath= "C:\Windows\SysWOW64\ejwgcusw\neexnmnb.exe /d\"C:\Users\Admin\AppData\Local\Temp\f1b843cc2d7e3ff9331102932f909119_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1732
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ejwgcusw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2924
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ejwgcusw
          2⤵
          • Launches sc.exe
          PID:1264
        • 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:1620
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4656 -s 1036
          2⤵
          • Program crash
          PID:2560
      • C:\Windows\SysWOW64\ejwgcusw\neexnmnb.exe
        C:\Windows\SysWOW64\ejwgcusw\neexnmnb.exe /d"C:\Users\Admin\AppData\Local\Temp\f1b843cc2d7e3ff9331102932f909119_JaffaCakes118.exe"
        1⤵
        • Sets service image path in registry
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2608
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Deletes itself
          PID:4492
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2608 -s 516
          2⤵
          • Program crash
          PID:1288
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 4656 -ip 4656
        1⤵
          PID:3912
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 2608 -ip 2608
          1⤵
            PID:3636

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            10.1MB

            MD5

            cb7e48510c2495afbebd02f8a12123f3

            SHA1

            6af9e3ef99502131ec2a3ddc10c7fe4a77c288d6

            SHA256

            2bdf84faad80a10633b0ccbacdf0e279d6adeabe0ef76768d5ae186cd58a7b16

            SHA512

            4796248e362da4ca66341f46e2a4d6ae7b4d2651ea2cd21b93786c6543c56cbc736427372f829c181a78f5101a68b3cad4c41f49c801aeb25b7805711ff85265

          • memory/2608-10-0x00000000005F0000-0x00000000006F0000-memory.dmp

            Filesize

            1024KB

          • memory/2608-11-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/2608-18-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/4492-12-0x0000000000B60000-0x0000000000B75000-memory.dmp

            Filesize

            84KB

          • memory/4492-15-0x0000000000B60000-0x0000000000B75000-memory.dmp

            Filesize

            84KB

          • memory/4492-16-0x0000000000B60000-0x0000000000B75000-memory.dmp

            Filesize

            84KB

          • memory/4492-17-0x0000000000B60000-0x0000000000B75000-memory.dmp

            Filesize

            84KB

          • memory/4492-19-0x0000000000B60000-0x0000000000B75000-memory.dmp

            Filesize

            84KB

          • memory/4656-3-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/4656-2-0x00000000004F0000-0x0000000000503000-memory.dmp

            Filesize

            76KB

          • memory/4656-8-0x0000000000400000-0x0000000000468000-memory.dmp

            Filesize

            416KB

          • memory/4656-9-0x00000000004F0000-0x0000000000503000-memory.dmp

            Filesize

            76KB

          • memory/4656-1-0x0000000000640000-0x0000000000740000-memory.dmp

            Filesize

            1024KB