Analysis

  • max time kernel
    150s
  • max time network
    151s
  • 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 21:13

General

  • Target

    f1efb145c5dda056d48a9442dc04926a_JaffaCakes118.exe

  • Size

    12.6MB

  • MD5

    f1efb145c5dda056d48a9442dc04926a

  • SHA1

    eaebffb29a1611d484e18a11af6dfdabd05fec3e

  • SHA256

    d295cb6824f3b1dee15da5e235dd3af4cd06c839a7c56adf62be284c4763ac7a

  • SHA512

    d3cdac4f2d34d26d8896dfbc6e4b42d7169b8ecb110067846d35bd893c9540613a16eb98409b5e4997d88475be5127237fc58a2d3978285cb6dfba35d70c7902

  • SSDEEP

    196608:XE/vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvn:XE

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\f1efb145c5dda056d48a9442dc04926a_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f1efb145c5dda056d48a9442dc04926a_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3064
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\arrsxkc\
      2⤵
        PID:3408
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kngomowg.exe" C:\Windows\SysWOW64\arrsxkc\
        2⤵
          PID:3536
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create arrsxkc binPath= "C:\Windows\SysWOW64\arrsxkc\kngomowg.exe /d\"C:\Users\Admin\AppData\Local\Temp\f1efb145c5dda056d48a9442dc04926a_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4332
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description arrsxkc "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4388
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start arrsxkc
          2⤵
          • Launches sc.exe
          PID:3884
        • 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:4588
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3064 -s 1196
          2⤵
          • Program crash
          PID:2764
      • C:\Windows\SysWOW64\arrsxkc\kngomowg.exe
        C:\Windows\SysWOW64\arrsxkc\kngomowg.exe /d"C:\Users\Admin\AppData\Local\Temp\f1efb145c5dda056d48a9442dc04926a_JaffaCakes118.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2612
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:2220
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2612 -s 512
          2⤵
          • Program crash
          PID:1608
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3064 -ip 3064
        1⤵
          PID:3320
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2612 -ip 2612
          1⤵
            PID:64

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            10.3MB

            MD5

            100ac28655dc1a450f58eae99b92a74f

            SHA1

            c498269629af96740ba8b5de327590498ac46586

            SHA256

            2a9d43ff1c8bf5965e8e7425ef04710b0225abaa72b36656374f0dc244a109cd

            SHA512

            1013281f9965d68c1e1445fea64b94e438919f7f2936aaa467725671acfe690cfb875be3df55efb8ed999942f565b95fcddbc56b5df21067d53668060a9df176

          • memory/2220-16-0x00000000004B0000-0x00000000004C5000-memory.dmp

            Filesize

            84KB

          • memory/2220-11-0x00000000004B0000-0x00000000004C5000-memory.dmp

            Filesize

            84KB

          • memory/2220-18-0x00000000004B0000-0x00000000004C5000-memory.dmp

            Filesize

            84KB

          • memory/2220-19-0x00000000004B0000-0x00000000004C5000-memory.dmp

            Filesize

            84KB

          • memory/2612-10-0x00000000009A0000-0x0000000000AA0000-memory.dmp

            Filesize

            1024KB

          • memory/2612-12-0x0000000000400000-0x0000000000870000-memory.dmp

            Filesize

            4.4MB

          • memory/2612-17-0x0000000000400000-0x0000000000870000-memory.dmp

            Filesize

            4.4MB

          • memory/3064-4-0x0000000000400000-0x0000000000870000-memory.dmp

            Filesize

            4.4MB

          • memory/3064-1-0x0000000000A90000-0x0000000000B90000-memory.dmp

            Filesize

            1024KB

          • memory/3064-8-0x0000000000400000-0x0000000000870000-memory.dmp

            Filesize

            4.4MB

          • memory/3064-9-0x00000000001E0000-0x00000000001F3000-memory.dmp

            Filesize

            76KB

          • memory/3064-2-0x00000000001E0000-0x00000000001F3000-memory.dmp

            Filesize

            76KB