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 13:35

General

  • Target

    2496bd1f22e675f292a9176022379b39bd6c0a74ca928ca3cca4d639a66f108f.exe

  • Size

    233KB

  • MD5

    b9c89c3ed216df0e259b9d0b38a2dc94

  • SHA1

    ea82873249048a2dc026d8bb24616147a9d95729

  • SHA256

    2496bd1f22e675f292a9176022379b39bd6c0a74ca928ca3cca4d639a66f108f

  • SHA512

    ce196ae521c72a6d6ea968a8a948f5ec7040a79616146e8b175accad9277c4a5e825b3af6d45bfde65f430863c0386a5724dd16e07d9b27878082d86a7644c88

  • SSDEEP

    3072:rJWQg26WaXsiQLhJi3s1KMnwFlscekf3O2D+sYc+VhfRv9ae:rJrSiLslsclz+PZ9f

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 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2496bd1f22e675f292a9176022379b39bd6c0a74ca928ca3cca4d639a66f108f.exe
    "C:\Users\Admin\AppData\Local\Temp\2496bd1f22e675f292a9176022379b39bd6c0a74ca928ca3cca4d639a66f108f.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1732
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ispzrpfy\
      2⤵
        PID:1248
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cjmhgaau.exe" C:\Windows\SysWOW64\ispzrpfy\
        2⤵
          PID:3048
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create ispzrpfy binPath= "C:\Windows\SysWOW64\ispzrpfy\cjmhgaau.exe /d\"C:\Users\Admin\AppData\Local\Temp\2496bd1f22e675f292a9176022379b39bd6c0a74ca928ca3cca4d639a66f108f.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2588
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description ispzrpfy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2672
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start ispzrpfy
          2⤵
          • Launches sc.exe
          PID:2844
        • 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:2696
      • C:\Windows\SysWOW64\ispzrpfy\cjmhgaau.exe
        C:\Windows\SysWOW64\ispzrpfy\cjmhgaau.exe /d"C:\Users\Admin\AppData\Local\Temp\2496bd1f22e675f292a9176022379b39bd6c0a74ca928ca3cca4d639a66f108f.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2712
        • 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:2612

      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\cjmhgaau.exe
        Filesize

        12.9MB

        MD5

        aade72f0bfa23f3007fe6daf610cfa12

        SHA1

        fa0783bd564b918ddcfe3808bf2adc9d767bc0d5

        SHA256

        9034f4e13ef498f6b5f6d6aafb46b3f39cbe9ca8d731db6cc31a148d188a8266

        SHA512

        b543efca4854ac52a27d8a7ad684436629c260774a9ccaba8d1f33ea5541e445aab122b147008ddee8e5801bf8c668dfa93a9bd189b23ef248105850b30cd0e4

      • memory/1732-3-0x0000000000230000-0x0000000000243000-memory.dmp
        Filesize

        76KB

      • memory/1732-1-0x0000000000880000-0x0000000000980000-memory.dmp
        Filesize

        1024KB

      • memory/1732-4-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/1732-7-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2612-38-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-45-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-60-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2612-14-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2612-9-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2612-56-0x00000000002B0000-0x00000000002B7000-memory.dmp
        Filesize

        28KB

      • memory/2612-18-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2612-19-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2612-21-0x0000000001900000-0x0000000001B0F000-memory.dmp
        Filesize

        2.1MB

      • memory/2612-24-0x0000000001900000-0x0000000001B0F000-memory.dmp
        Filesize

        2.1MB

      • memory/2612-32-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-35-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-34-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-33-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-48-0x00000000001D0000-0x00000000001D5000-memory.dmp
        Filesize

        20KB

      • memory/2612-47-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-46-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-55-0x0000000005830000-0x0000000005C3B000-memory.dmp
        Filesize

        4.0MB

      • memory/2612-44-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-43-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-51-0x00000000001D0000-0x00000000001D5000-memory.dmp
        Filesize

        20KB

      • memory/2612-42-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-41-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-40-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-39-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2612-37-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-36-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-31-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-28-0x00000000001C0000-0x00000000001D0000-memory.dmp
        Filesize

        64KB

      • memory/2612-25-0x00000000001B0000-0x00000000001B6000-memory.dmp
        Filesize

        24KB

      • memory/2612-52-0x0000000005830000-0x0000000005C3B000-memory.dmp
        Filesize

        4.0MB

      • memory/2712-11-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2712-15-0x0000000000400000-0x000000000043E000-memory.dmp
        Filesize

        248KB

      • memory/2712-10-0x0000000000250000-0x0000000000350000-memory.dmp
        Filesize

        1024KB