Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    10-05-2024 05:20

General

  • Target

    f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05.exe

  • Size

    10.5MB

  • MD5

    400992e89f640ced83313c8d0cec106e

  • SHA1

    abcc1616d181034b37b6e2aee2b274a4b241ed7f

  • SHA256

    f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05

  • SHA512

    8ef86fc13c10e0867111159265d0f6e3a011e35aa07b51aa94b6a52bf80272fff5a0339e3dea13e9c87a0c3f319d87014326256372dfb27bd2c74d58d7e42e15

  • SSDEEP

    12288:xucqxGrf50Fqwswswswswswswswswswswswswswswswswswswswswswswswswswv:xuM6F

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) 2 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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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\f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05.exe
    "C:\Users\Admin\AppData\Local\Temp\f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2396
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xifkpvar\
      2⤵
        PID:2988
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\cjivddlp.exe" C:\Windows\SysWOW64\xifkpvar\
        2⤵
          PID:3012
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xifkpvar binPath= "C:\Windows\SysWOW64\xifkpvar\cjivddlp.exe /d\"C:\Users\Admin\AppData\Local\Temp\f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2804
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description xifkpvar "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2896
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start xifkpvar
          2⤵
          • Launches sc.exe
          PID:2660
        • 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:2612
      • C:\Windows\SysWOW64\xifkpvar\cjivddlp.exe
        C:\Windows\SysWOW64\xifkpvar\cjivddlp.exe /d"C:\Users\Admin\AppData\Local\Temp\f00b17829026124838d62c5d1f920a720476547d5e8309c5027614d29a416e05.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2708
        • 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:2336

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        11.3MB

        MD5

        ffc378823c80c31677fa3e3b45f67c63

        SHA1

        931a2b03bc9fbf7dc2386a2357dc0b9a9dd01e0a

        SHA256

        40c2ac8c5d58326b5e7f11eec379b1d8202a0f51568f9acdae227b481ce3bf26

        SHA512

        0596d832105e8305c5ad61a3310b1d213d188f88fbadf0667b1d5260d0ac834715f19e3ac97d2277d6c8afbbe252b77e8fe98a5dda1c54a106f6ced8946ceb03

      • memory/2336-44-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-31-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-30-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-12-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2336-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2336-9-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2336-54-0x0000000005450000-0x000000000585B000-memory.dmp

        Filesize

        4.0MB

      • memory/2336-42-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-39-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-32-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2336-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2336-23-0x0000000001930000-0x0000000001B3F000-memory.dmp

        Filesize

        2.1MB

      • memory/2336-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

        Filesize

        24KB

      • memory/2336-27-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-20-0x0000000001930000-0x0000000001B3F000-memory.dmp

        Filesize

        2.1MB

      • memory/2336-41-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-40-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-33-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-34-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-45-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-51-0x0000000005450000-0x000000000585B000-memory.dmp

        Filesize

        4.0MB

      • memory/2336-50-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

      • memory/2336-47-0x00000000000C0000-0x00000000000C5000-memory.dmp

        Filesize

        20KB

      • memory/2336-46-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-55-0x0000000000110000-0x0000000000117000-memory.dmp

        Filesize

        28KB

      • memory/2336-35-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-43-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-38-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-37-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2336-36-0x00000000000B0000-0x00000000000C0000-memory.dmp

        Filesize

        64KB

      • memory/2396-1-0x0000000002FD0000-0x00000000030D0000-memory.dmp

        Filesize

        1024KB

      • memory/2396-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2396-7-0x0000000000400000-0x0000000002B6C000-memory.dmp

        Filesize

        39.4MB

      • memory/2396-14-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2396-15-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2396-2-0x0000000000220000-0x0000000000233000-memory.dmp

        Filesize

        76KB

      • memory/2708-16-0x0000000000400000-0x0000000002B6C000-memory.dmp

        Filesize

        39.4MB