Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/03/2024, 16:12

General

  • Target

    de6b0434de35cf7e80ca010ea9c0bd03.exe

  • Size

    10.7MB

  • MD5

    de6b0434de35cf7e80ca010ea9c0bd03

  • SHA1

    1465db214939cdf236463023b37ec908d97bf4e5

  • SHA256

    b33a01548088b02d5ef5e727d704cb0f60adb233a8c0592e59ff4c69204cb9e1

  • SHA512

    df25341fcfbe0c16e563958c0d10d5f09d7b61651d8a0c22d4cd24924372a352ccd7c01de9d0a51e550b984001dda389269c08f7029487c38a5de8799bdfe1b9

  • SSDEEP

    49152:jyjfVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV3:

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

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\de6b0434de35cf7e80ca010ea9c0bd03.exe
    "C:\Users\Admin\AppData\Local\Temp\de6b0434de35cf7e80ca010ea9c0bd03.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4348
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oxzjlybb\
      2⤵
        PID:4268
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ckzdqoxx.exe" C:\Windows\SysWOW64\oxzjlybb\
        2⤵
          PID:2412
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oxzjlybb binPath= "C:\Windows\SysWOW64\oxzjlybb\ckzdqoxx.exe /d\"C:\Users\Admin\AppData\Local\Temp\de6b0434de35cf7e80ca010ea9c0bd03.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4636
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oxzjlybb "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3812
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oxzjlybb
          2⤵
          • Launches sc.exe
          PID:4888
        • 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:2228
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4348 -s 1272
          2⤵
          • Program crash
          PID:840
      • C:\Windows\SysWOW64\oxzjlybb\ckzdqoxx.exe
        C:\Windows\SysWOW64\oxzjlybb\ckzdqoxx.exe /d"C:\Users\Admin\AppData\Local\Temp\de6b0434de35cf7e80ca010ea9c0bd03.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:1956
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:2056
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 1956 -s 516
          2⤵
          • Program crash
          PID:4976
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 1956 -ip 1956
        1⤵
          PID:3868
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 496 -p 4348 -ip 4348
          1⤵
            PID:956

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            11.2MB

            MD5

            b2119dab7c0f24bd5f153dc10be26bde

            SHA1

            7b971ea4b0d4b21d962725f060d03dc0f1715f0a

            SHA256

            f501dd0057e7bad603bc2e1a5b4ba7e34e490e4138b2f5eed578084ebf0c79bf

            SHA512

            daebf2c43d6c701903aef6cf527f97a5588665c0e655172356c263cec2e3f65120cb4c161ac9d931538af5173fa156e8ed6b7c8662cbc7a870039db9122243c5

          • memory/1956-11-0x0000000000400000-0x0000000000C18000-memory.dmp

            Filesize

            8.1MB

          • memory/1956-8-0x0000000000D70000-0x0000000000E70000-memory.dmp

            Filesize

            1024KB

          • memory/1956-9-0x0000000001070000-0x0000000001083000-memory.dmp

            Filesize

            76KB

          • memory/1956-15-0x0000000000400000-0x0000000000C18000-memory.dmp

            Filesize

            8.1MB

          • memory/2056-10-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

            Filesize

            84KB

          • memory/2056-14-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

            Filesize

            84KB

          • memory/2056-17-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

            Filesize

            84KB

          • memory/2056-18-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

            Filesize

            84KB

          • memory/2056-19-0x0000000000DE0000-0x0000000000DF5000-memory.dmp

            Filesize

            84KB

          • memory/4348-4-0x0000000000400000-0x0000000000C18000-memory.dmp

            Filesize

            8.1MB

          • memory/4348-2-0x0000000000D80000-0x0000000000D93000-memory.dmp

            Filesize

            76KB

          • memory/4348-1-0x0000000000EE0000-0x0000000000FE0000-memory.dmp

            Filesize

            1024KB

          • memory/4348-16-0x0000000000400000-0x0000000000C18000-memory.dmp

            Filesize

            8.1MB