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Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/12/2024, 15:28

General

  • Target

    JaffaCakes118_02f60de1d02c050974a99959911893d5403197d750c27bbfcbddefa78dc1911e.exe

  • Size

    341KB

  • MD5

    edb174c9c6f39a28010ba93010e5fe6c

  • SHA1

    8524f85e693835b79b8b6826d920e8ac6a2fa022

  • SHA256

    02f60de1d02c050974a99959911893d5403197d750c27bbfcbddefa78dc1911e

  • SHA512

    c01e94ed539bb7f206597d23d0b0a35a9fb339077a4f8dcf6bc33e0fe3db1197d087a56cdee6ae7c4832ef67aa1f6974f852189f4e6058a40d9b5fa3483ba8c3

  • SSDEEP

    6144:GrAfPQiuplIecQmWBLRnGoB2fp1nOAaUK50q:GrAgHUeTmGLRnGoB2fKd5f

Malware Config

Extracted

Family

tofsee

C2

quadoil.ru

lakeflex.ru

Signatures

  • Tofsee

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

  • Tofsee family
  • Creates new service(s) 2 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Program crash 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_02f60de1d02c050974a99959911893d5403197d750c27bbfcbddefa78dc1911e.exe
    "C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_02f60de1d02c050974a99959911893d5403197d750c27bbfcbddefa78dc1911e.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3996
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\mdrrxlfc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4840
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kljtwpuf.exe" C:\Windows\SysWOW64\mdrrxlfc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2660
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create mdrrxlfc binPath= "C:\Windows\SysWOW64\mdrrxlfc\kljtwpuf.exe /d\"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_02f60de1d02c050974a99959911893d5403197d750c27bbfcbddefa78dc1911e.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3724
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description mdrrxlfc "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2324
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start mdrrxlfc
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3624
    • 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
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:2092
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3996 -s 1040
      2⤵
      • Program crash
      PID:2420
  • C:\Windows\SysWOW64\mdrrxlfc\kljtwpuf.exe
    C:\Windows\SysWOW64\mdrrxlfc\kljtwpuf.exe /d"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_02f60de1d02c050974a99959911893d5403197d750c27bbfcbddefa78dc1911e.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3496
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:4044
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3496 -s 520
      2⤵
      • Program crash
      PID:4732
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 3996 -ip 3996
    1⤵
      PID:3172
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 3496 -ip 3496
      1⤵
        PID:3476

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.6MB

        MD5

        2fe579ee594969fd4a2c2c9d88777623

        SHA1

        0f624c9415ffbd5dd159d196f3796f4cb6bbba69

        SHA256

        4a83218a3c4ffef1e9383afdf8136176dcffaa6d4a1a6cf16be19f02c8c290ec

        SHA512

        68b34eeadd2b6cdca412b46a909fb74010ecb227dc55f79c29565a9646bf3442217594312e8a02690018d1ad5bdddef33e5975b9f1f9e70e97d01253a5cba16b

      • memory/3496-15-0x0000000000400000-0x00000000008F8000-memory.dmp

        Filesize

        5.0MB

      • memory/3996-1-0x0000000000920000-0x0000000000A20000-memory.dmp

        Filesize

        1024KB

      • memory/3996-2-0x0000000000A90000-0x0000000000AA3000-memory.dmp

        Filesize

        76KB

      • memory/3996-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3996-7-0x0000000000400000-0x00000000008F8000-memory.dmp

        Filesize

        5.0MB

      • memory/3996-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3996-8-0x0000000000A90000-0x0000000000AA3000-memory.dmp

        Filesize

        76KB

      • memory/4044-11-0x0000000000580000-0x0000000000595000-memory.dmp

        Filesize

        84KB

      • memory/4044-13-0x0000000000580000-0x0000000000595000-memory.dmp

        Filesize

        84KB

      • memory/4044-14-0x0000000000580000-0x0000000000595000-memory.dmp

        Filesize

        84KB