Analysis

  • max time kernel
    149s
  • 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
    16-04-2024 08:41

General

  • Target

    f31cde8973df6ea521b90fdf8227374e_JaffaCakes118.exe

  • Size

    13.0MB

  • MD5

    f31cde8973df6ea521b90fdf8227374e

  • SHA1

    8bf7046fa636123c79e9e333f11c676364d038d0

  • SHA256

    bbc6f4150ca247ebe2375c8c2041830d73a2c3c09df021f2c69c5ba16b4912b8

  • SHA512

    1f20e1a8bc4914f9f774748b7d2d639506dc5d7ffdc288eb3c7f77aa8df2671c4c968dcf55f47556bee8dbe0e19c6785e538c813e7669ddd85733f82034b92e6

  • SSDEEP

    12288:awyc+f7Y47sgQhihFAXE6iPzp666666666666666666666666666666666666662:aw+f7VQhBW

Malware Config

Extracted

Family

tofsee

C2

43.231.4.6

lazystax.ru

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\f31cde8973df6ea521b90fdf8227374e_JaffaCakes118.exe
    "C:\Users\Admin\AppData\Local\Temp\f31cde8973df6ea521b90fdf8227374e_JaffaCakes118.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3756
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\larrmayy\
      2⤵
        PID:2060
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\eyadwvv.exe" C:\Windows\SysWOW64\larrmayy\
        2⤵
          PID:2956
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create larrmayy binPath= "C:\Windows\SysWOW64\larrmayy\eyadwvv.exe /d\"C:\Users\Admin\AppData\Local\Temp\f31cde8973df6ea521b90fdf8227374e_JaffaCakes118.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3696
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description larrmayy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3552
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start larrmayy
          2⤵
          • Launches sc.exe
          PID:1248
        • 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:3016
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 3756 -s 1044
          2⤵
          • Program crash
          PID:3960
      • C:\Windows\SysWOW64\larrmayy\eyadwvv.exe
        C:\Windows\SysWOW64\larrmayy\eyadwvv.exe /d"C:\Users\Admin\AppData\Local\Temp\f31cde8973df6ea521b90fdf8227374e_JaffaCakes118.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2364
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:2756
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2364 -s 520
          2⤵
          • Program crash
          PID:5112
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3756 -ip 3756
        1⤵
          PID:2464
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2364 -ip 2364
          1⤵
            PID:5080

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            14.3MB

            MD5

            4bbb86d3b5d359dfef2af396794aed42

            SHA1

            07c478d4871b680c12f884033db75fd87f325575

            SHA256

            118213ad96f0eccf55e3cd69bd4a2a7710e38c12293eb7057f1a7a9a137c97b3

            SHA512

            dff593fd6c21210ee86c79a40b855799ba770cc61f4e07c7dbe983c477c693f8baaea5a8c687d2f8529dc57f8790e607b89976f396528af0d4a78b32f258fda0

          • memory/2364-10-0x0000000000F80000-0x0000000001080000-memory.dmp

            Filesize

            1024KB

          • memory/2364-11-0x0000000000400000-0x0000000000C13000-memory.dmp

            Filesize

            8.1MB

          • memory/2364-17-0x0000000000400000-0x0000000000C13000-memory.dmp

            Filesize

            8.1MB

          • memory/2756-12-0x0000000000920000-0x0000000000935000-memory.dmp

            Filesize

            84KB

          • memory/2756-16-0x0000000000920000-0x0000000000935000-memory.dmp

            Filesize

            84KB

          • memory/2756-18-0x0000000000920000-0x0000000000935000-memory.dmp

            Filesize

            84KB

          • memory/2756-19-0x0000000000920000-0x0000000000935000-memory.dmp

            Filesize

            84KB

          • memory/3756-4-0x0000000000400000-0x0000000000C13000-memory.dmp

            Filesize

            8.1MB

          • memory/3756-2-0x0000000002950000-0x0000000002963000-memory.dmp

            Filesize

            76KB

          • memory/3756-7-0x0000000000400000-0x0000000000C13000-memory.dmp

            Filesize

            8.1MB

          • memory/3756-8-0x0000000002950000-0x0000000002963000-memory.dmp

            Filesize

            76KB

          • memory/3756-1-0x0000000000EA0000-0x0000000000FA0000-memory.dmp

            Filesize

            1024KB