Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    17-04-2024 12:58

General

  • Target

    a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de.exe

  • Size

    227KB

  • MD5

    1010b86bd744c31ecef5f5aeae5ca6df

  • SHA1

    79dbaab22a85e8a0c3124d39423da1ca24c358e8

  • SHA256

    a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de

  • SHA512

    6823068623029c10aa0d833be8422b6d93663832d24298bd9811f7700bbc56dc5463fd75f12273e2168bac6784a16e735cc86cf0de8841e83c1befc75bdfd02d

  • SSDEEP

    3072:BG/VLLNVnlMoDjq0sg0lpb15L76ZhBUrIeGskK+KgPcf53whT5A/hTu:8Lh9ljdOlPB6tUrIK+zPcRaCpT

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\a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de.exe
    "C:\Users\Admin\AppData\Local\Temp\a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3068
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\wcqtfkfp\
      2⤵
        PID:2604
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zplavnlt.exe" C:\Windows\SysWOW64\wcqtfkfp\
        2⤵
          PID:3044
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create wcqtfkfp binPath= "C:\Windows\SysWOW64\wcqtfkfp\zplavnlt.exe /d\"C:\Users\Admin\AppData\Local\Temp\a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2568
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description wcqtfkfp "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2660
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start wcqtfkfp
          2⤵
          • Launches sc.exe
          PID:2364
        • 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:2436
      • C:\Windows\SysWOW64\wcqtfkfp\zplavnlt.exe
        C:\Windows\SysWOW64\wcqtfkfp\zplavnlt.exe /d"C:\Users\Admin\AppData\Local\Temp\a7c2b8d081407da5d72f12eeef21c11674ff616c89be40f73f114c292c09e6de.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2080
        • 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:2908

      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\zplavnlt.exe
        Filesize

        14.6MB

        MD5

        2a483fb50d002bbbf7119f3e9238a0e9

        SHA1

        b714e253380c763bda2d0dc5b6817daf8fa29510

        SHA256

        3530a3dce784000926c2ad9990a3a86442b0ad1a457a35365752bc5569d7a0cd

        SHA512

        708b3a3d584fa3e067cac4243160faa2717e5a44097a45869ddcf69de487522825ae20fb14b5db5895e787454609b266c28b1ddc1c2d59dedf07b0bb67106518

      • memory/2080-16-0x0000000000400000-0x0000000002B11000-memory.dmp
        Filesize

        39.1MB

      • memory/2080-13-0x0000000000250000-0x0000000000350000-memory.dmp
        Filesize

        1024KB

      • memory/2908-52-0x00000000003D0000-0x00000000003D5000-memory.dmp
        Filesize

        20KB

      • memory/2908-57-0x00000000003E0000-0x00000000003E7000-memory.dmp
        Filesize

        28KB

      • memory/2908-8-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2908-46-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-61-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2908-45-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-17-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2908-56-0x0000000005A70000-0x0000000005E7B000-memory.dmp
        Filesize

        4.0MB

      • memory/2908-19-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2908-20-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2908-22-0x0000000001980000-0x0000000001B8F000-memory.dmp
        Filesize

        2.1MB

      • memory/2908-25-0x0000000001980000-0x0000000001B8F000-memory.dmp
        Filesize

        2.1MB

      • memory/2908-29-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-26-0x0000000000230000-0x0000000000236000-memory.dmp
        Filesize

        24KB

      • memory/2908-32-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-49-0x00000000003D0000-0x00000000003D5000-memory.dmp
        Filesize

        20KB

      • memory/2908-48-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-47-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-11-0x0000000000080000-0x0000000000095000-memory.dmp
        Filesize

        84KB

      • memory/2908-9-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2908-43-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-44-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-42-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-41-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-40-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-39-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-38-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-33-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-37-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-36-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-35-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/2908-53-0x0000000005A70000-0x0000000005E7B000-memory.dmp
        Filesize

        4.0MB

      • memory/2908-34-0x00000000003C0000-0x00000000003D0000-memory.dmp
        Filesize

        64KB

      • memory/3068-2-0x0000000002F80000-0x0000000003080000-memory.dmp
        Filesize

        1024KB

      • memory/3068-18-0x0000000000400000-0x0000000002B11000-memory.dmp
        Filesize

        39.1MB

      • memory/3068-3-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/3068-4-0x0000000000400000-0x0000000002B11000-memory.dmp
        Filesize

        39.1MB