Analysis

  • max time kernel
    153s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-04-2024 17:55

General

  • Target

    f1a4db415a4dd63a80f0b8cc7a2d2362_JaffaCakes118.exe

  • Size

    11.1MB

  • MD5

    f1a4db415a4dd63a80f0b8cc7a2d2362

  • SHA1

    d1287fa03a80d1626605431cd341e9d5049afba5

  • SHA256

    87140618703529cf84c6e119ecde2b6faeabba17cd73a817ee17856b2692bb70

  • SHA512

    15a8b53f82a86fabc1a84f52b4b2fe5e59bac869d18996465b355932f7c286250790e54dada414afef270b9c31d5bd9cbfe2fc3aa0e20badc35b3f7f658dfdf5

  • SSDEEP

    12288:WiuYCjGjdPej7mB+DCXRFRFRFRFRFRFRFRFRFRFRFRFRFRFRFRFRFRFRFRFRFRFJ:RCjGDoD

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 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f1a4db415a4dd63a80f0b8cc7a2d2362_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f1a4db415a4dd63a80f0b8cc7a2d2362_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4504
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rpdydnxe\
      2⤵
        PID:552
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vvobnkjl.exe" C:\Windows\SysWOW64\rpdydnxe\
        2⤵
          PID:456
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rpdydnxe binPath= "C:\Windows\SysWOW64\rpdydnxe\vvobnkjl.exe /d\"C:\Users\Admin\AppData\Local\Temp\f1a4db415a4dd63a80f0b8cc7a2d2362_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4180
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rpdydnxe "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1060
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rpdydnxe
          2⤵
          • Launches sc.exe
          PID:4112
        • 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:752
      • C:\Windows\SysWOW64\rpdydnxe\vvobnkjl.exe
        C:\Windows\SysWOW64\rpdydnxe\vvobnkjl.exe /d"C:\Users\Admin\AppData\Local\Temp\f1a4db415a4dd63a80f0b8cc7a2d2362_JaffaCakes118.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2100
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:3744
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2100 -s 512
          2⤵
          • Program crash
          PID:3692
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 424 -p 2100 -ip 2100
        1⤵
          PID:5040
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1424 --field-trial-handle=2180,i,12780723798465539942,12010519452607841069,262144 --variations-seed-version /prefetch:8
          1⤵
            PID:4600

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.4MB

            MD5

            82e20f8d817f417fa627bac370bb73e2

            SHA1

            a9780f4880e6fa06b7c5fddf900b9549163b81d9

            SHA256

            1e7636012b67b7dfdaf2637d1b607caf2dd2306ee02d6ce09bd20911712c80a1

            SHA512

            0a33d53be9723edaf1f71a7e29bdd4d67fd71a0dd1ad5b002fbba1a10e7196033db4ca29b7ac7377c97af189f3ac63b33b45635a0ee137372f789b98f06ed85f

          • memory/2100-11-0x0000000002510000-0x0000000002610000-memory.dmp

            Filesize

            1024KB

          • memory/2100-19-0x0000000000400000-0x00000000023AD000-memory.dmp

            Filesize

            31.7MB

          • memory/2100-16-0x0000000000400000-0x00000000023AD000-memory.dmp

            Filesize

            31.7MB

          • memory/3744-15-0x0000000000E70000-0x0000000000E85000-memory.dmp

            Filesize

            84KB

          • memory/3744-12-0x0000000000E70000-0x0000000000E85000-memory.dmp

            Filesize

            84KB

          • memory/3744-17-0x0000000000E70000-0x0000000000E85000-memory.dmp

            Filesize

            84KB

          • memory/3744-18-0x0000000000E70000-0x0000000000E85000-memory.dmp

            Filesize

            84KB

          • memory/3744-20-0x0000000000E70000-0x0000000000E85000-memory.dmp

            Filesize

            84KB

          • memory/4504-7-0x0000000000400000-0x00000000023AD000-memory.dmp

            Filesize

            31.7MB

          • memory/4504-8-0x00000000040F0000-0x0000000004103000-memory.dmp

            Filesize

            76KB

          • memory/4504-6-0x0000000000400000-0x00000000023AD000-memory.dmp

            Filesize

            31.7MB

          • memory/4504-1-0x00000000023F0000-0x00000000024F0000-memory.dmp

            Filesize

            1024KB

          • memory/4504-4-0x0000000000400000-0x00000000023AD000-memory.dmp

            Filesize

            31.7MB

          • memory/4504-2-0x00000000040F0000-0x0000000004103000-memory.dmp

            Filesize

            76KB