Analysis

  • max time kernel
    167s
  • max time network
    183s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/01/2024, 03:42

General

  • Target

    4a585ee0c216369f0392abd7b7ef0c1c.exe

  • Size

    11.4MB

  • MD5

    4a585ee0c216369f0392abd7b7ef0c1c

  • SHA1

    ecd87636940b7b7b650bae8c43f4d7afbcb291ec

  • SHA256

    3fb717331c0f4b48744117e7844a4bcf08333af621cfcfe790d4a5e2dcf810fe

  • SHA512

    8beae9f3b75758469f155b9b8a91d030e3282ab7414edc6ec47572aae5c87e944aec40cb627abc3d0c1c4f7c0730f32d02f1ec7e5511aa4dfc4b610b14a2b5c7

  • SSDEEP

    24576:OjCj10HSqGgeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeW:O/D

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 1 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.

  • 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).

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4a585ee0c216369f0392abd7b7ef0c1c.exe
    "C:\Users\Admin\AppData\Local\Temp\4a585ee0c216369f0392abd7b7ef0c1c.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4488
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\znwhtfuy\
      2⤵
        PID:440
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\xkbkcprl.exe" C:\Windows\SysWOW64\znwhtfuy\
        2⤵
          PID:392
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create znwhtfuy binPath= "C:\Windows\SysWOW64\znwhtfuy\xkbkcprl.exe /d\"C:\Users\Admin\AppData\Local\Temp\4a585ee0c216369f0392abd7b7ef0c1c.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:1564
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description znwhtfuy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2820
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start znwhtfuy
          2⤵
          • Launches sc.exe
          PID:2316
        • 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:1684
      • C:\Windows\SysWOW64\znwhtfuy\xkbkcprl.exe
        C:\Windows\SysWOW64\znwhtfuy\xkbkcprl.exe /d"C:\Users\Admin\AppData\Local\Temp\4a585ee0c216369f0392abd7b7ef0c1c.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3876
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          PID:3420

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              10.6MB

              MD5

              700f7fe960dd994622134ecb5039dd15

              SHA1

              4b0fe978100a417553749953f694554ac09cbd0c

              SHA256

              90c1ddcb3aa01d5c896f263022a197d9cce01a41688c32352585702bdddcd602

              SHA512

              0aad6304fabf1eed1576f97b69406829fe0805aeff9932b6b9902a51d119793f64cd80c408f72a457a6e3b0f1ca1f6ab9ba024913ed04882491113dd8c298f84

            • memory/3420-13-0x00000000012F0000-0x0000000001305000-memory.dmp

              Filesize

              84KB

            • memory/3420-27-0x00000000012F0000-0x0000000001305000-memory.dmp

              Filesize

              84KB

            • memory/3420-21-0x00000000012F0000-0x0000000001305000-memory.dmp

              Filesize

              84KB

            • memory/3420-20-0x00000000012F0000-0x0000000001305000-memory.dmp

              Filesize

              84KB

            • memory/3420-17-0x00000000012F0000-0x0000000001305000-memory.dmp

              Filesize

              84KB

            • memory/3876-12-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/3876-11-0x0000000000510000-0x0000000000523000-memory.dmp

              Filesize

              76KB

            • memory/3876-10-0x0000000000560000-0x0000000000660000-memory.dmp

              Filesize

              1024KB

            • memory/3876-19-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/4488-1-0x00000000005F0000-0x00000000006F0000-memory.dmp

              Filesize

              1024KB

            • memory/4488-16-0x00000000005F0000-0x00000000006F0000-memory.dmp

              Filesize

              1024KB

            • memory/4488-7-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/4488-5-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/4488-3-0x0000000000400000-0x000000000046E000-memory.dmp

              Filesize

              440KB

            • memory/4488-2-0x00000000005D0000-0x00000000005E3000-memory.dmp

              Filesize

              76KB