Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 14:50

General

  • Target

    7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe

  • Size

    229KB

  • MD5

    ddb3205a92ff18ae17b3f9f93c7b197c

  • SHA1

    b77c666a2d7b1f63ba08316f9a221be6ac1f786a

  • SHA256

    7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8

  • SHA512

    db659ead4fd2ed186f221adf5bb9ab5b686253454eeb307ba247a99d8026c009d72ed11473d4622146c7b6cf59f445ad3b020ac3394d3f61af5bfd385b43c334

  • SSDEEP

    3072:lnUQviqZALXadUs0vEJimn1K29YbqYZgpLneYDR89fJ5j3UxS6MeILYS:lnUzPjflapLnsdT3U2eILY

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

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

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 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).

  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe
    "C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2088
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zcnxzncw\
      2⤵
        PID:2696
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jqxapdwg.exe" C:\Windows\SysWOW64\zcnxzncw\
        2⤵
          PID:2900
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create zcnxzncw binPath= "C:\Windows\SysWOW64\zcnxzncw\jqxapdwg.exe /d\"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description zcnxzncw "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2712
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start zcnxzncw
          2⤵
          • Launches sc.exe
          PID:2628
        • 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:2456
      • C:\Windows\SysWOW64\zcnxzncw\jqxapdwg.exe
        C:\Windows\SysWOW64\zcnxzncw\jqxapdwg.exe /d"C:\Users\Admin\AppData\Local\Temp\7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2408
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Windows security bypass
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:2428

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Persistence

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Privilege Escalation

      Create or Modify System Process

      2
      T1543

      Windows Service

      2
      T1543.003

      Boot or Logon Autostart Execution

      1
      T1547

      Registry Run Keys / Startup Folder

      1
      T1547.001

      Defense Evasion

      Impair Defenses

      2
      T1562

      Disable or Modify Tools

      1
      T1562.001

      Disable or Modify System Firewall

      1
      T1562.004

      Modify Registry

      2
      T1112

      Discovery

      System Information Discovery

      1
      T1082

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\jqxapdwg.exe
        Filesize

        10.8MB

        MD5

        8f15b6b083d612e4783e1b95a14609a5

        SHA1

        3b14456bddfb4d5293a255da921cccd4e0b57821

        SHA256

        2e14f56a46e30fd130b93839075cd7800e10c8a08b4aea1bace60d31377eae7c

        SHA512

        dff2754c94a9eb2ac04acc406bb0dfe9f32fa0947f0f9acaab818d36394eea435688553b9ffe797044ccca405d2ecdbca74342b1dffb19cc631a4e15eb4a2ab4

      • memory/2088-17-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2088-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2088-4-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2088-2-0x0000000000560000-0x0000000000660000-memory.dmp
        Filesize

        1024KB

      • memory/2408-10-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2408-9-0x0000000000520000-0x0000000000620000-memory.dmp
        Filesize

        1024KB

      • memory/2408-14-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2428-35-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-38-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-8-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2428-19-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2428-20-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2428-22-0x00000000017F0000-0x00000000019FF000-memory.dmp
        Filesize

        2.1MB

      • memory/2428-25-0x00000000017F0000-0x00000000019FF000-memory.dmp
        Filesize

        2.1MB

      • memory/2428-26-0x00000000002E0000-0x00000000002E6000-memory.dmp
        Filesize

        24KB

      • memory/2428-29-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-32-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-33-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-34-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2428-36-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-37-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-13-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB

      • memory/2428-39-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-40-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-41-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-42-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-43-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-44-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-45-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-46-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-47-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-48-0x00000000002F0000-0x0000000000300000-memory.dmp
        Filesize

        64KB

      • memory/2428-49-0x0000000000300000-0x0000000000305000-memory.dmp
        Filesize

        20KB

      • memory/2428-52-0x0000000000300000-0x0000000000305000-memory.dmp
        Filesize

        20KB

      • memory/2428-53-0x0000000005450000-0x000000000585B000-memory.dmp
        Filesize

        4.0MB

      • memory/2428-56-0x0000000005450000-0x000000000585B000-memory.dmp
        Filesize

        4.0MB

      • memory/2428-57-0x00000000005D0000-0x00000000005D7000-memory.dmp
        Filesize

        28KB

      • memory/2428-61-0x00000000000C0000-0x00000000000D5000-memory.dmp
        Filesize

        84KB