Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/08/2023, 14:45

General

  • Target

    72f9d9ab0b467c913db0988f5b4126d819c1ae42844415d6d1e3df2e92d1a2a5_JC.exe

  • Size

    253KB

  • MD5

    c79e74e97d749a3e9bd428952d420362

  • SHA1

    439a647fa65ca835ae8ee667b12b368b2db099d1

  • SHA256

    72f9d9ab0b467c913db0988f5b4126d819c1ae42844415d6d1e3df2e92d1a2a5

  • SHA512

    651ff8c8c18b7986cc6da681be0718235bf7f25efcb27568d33269c277f9d47c09019dca875dc5803510741f872385ae1decf424159524636c2f6352324c7aea

  • SSDEEP

    3072:K/YZvaldnqbzvCOBds5C4Z9pGcnqrxGaK3jHTmzUj/L12rjqTu4:kQzvtBdwVzZqrIn3PbdWf4

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.

  • Creates new service(s) 1 TTPs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\72f9d9ab0b467c913db0988f5b4126d819c1ae42844415d6d1e3df2e92d1a2a5_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\72f9d9ab0b467c913db0988f5b4126d819c1ae42844415d6d1e3df2e92d1a2a5_JC.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1228
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vodqvnut\
      2⤵
        PID:1280
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\szcxwqqk.exe" C:\Windows\SysWOW64\vodqvnut\
        2⤵
          PID:2796
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create vodqvnut binPath= "C:\Windows\SysWOW64\vodqvnut\szcxwqqk.exe /d\"C:\Users\Admin\AppData\Local\Temp\72f9d9ab0b467c913db0988f5b4126d819c1ae42844415d6d1e3df2e92d1a2a5_JC.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2316
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description vodqvnut "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1124
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start vodqvnut
          2⤵
          • Launches sc.exe
          PID:4768
        • 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:3088
      • C:\Windows\SysWOW64\vodqvnut\szcxwqqk.exe
        C:\Windows\SysWOW64\vodqvnut\szcxwqqk.exe /d"C:\Users\Admin\AppData\Local\Temp\72f9d9ab0b467c913db0988f5b4126d819c1ae42844415d6d1e3df2e92d1a2a5_JC.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:5092
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:1832

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        14.4MB

        MD5

        57cabff85bcc6ebbe16ec8eddc4a5f1a

        SHA1

        42f60a4e2bd757a0abcc02dfa3ce1b04cb355656

        SHA256

        1e5d095e2f9295b6690c02ba475322e28c5df24a54282bab70c19f2a8f86438e

        SHA512

        909b8b58d2edb29e3285854e41956d2a6402ee2d5c2cc5d210f33d55682624371e9d99547d6d53b689afa7dad414d177da1d7baf9bf4e40e683419b74ad01bee

      • C:\Windows\SysWOW64\vodqvnut\szcxwqqk.exe

        Filesize

        14.4MB

        MD5

        57cabff85bcc6ebbe16ec8eddc4a5f1a

        SHA1

        42f60a4e2bd757a0abcc02dfa3ce1b04cb355656

        SHA256

        1e5d095e2f9295b6690c02ba475322e28c5df24a54282bab70c19f2a8f86438e

        SHA512

        909b8b58d2edb29e3285854e41956d2a6402ee2d5c2cc5d210f33d55682624371e9d99547d6d53b689afa7dad414d177da1d7baf9bf4e40e683419b74ad01bee

      • memory/1228-7-0x0000000000400000-0x00000000022E6000-memory.dmp

        Filesize

        30.9MB

      • memory/1228-2-0x00000000024B0000-0x00000000024C3000-memory.dmp

        Filesize

        76KB

      • memory/1228-4-0x0000000000400000-0x00000000022E6000-memory.dmp

        Filesize

        30.9MB

      • memory/1228-1-0x00000000023A0000-0x00000000024A0000-memory.dmp

        Filesize

        1024KB

      • memory/1832-43-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-36-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-56-0x00000000033D0000-0x00000000033D7000-memory.dmp

        Filesize

        28KB

      • memory/1832-55-0x0000000007D80000-0x000000000818B000-memory.dmp

        Filesize

        4.0MB

      • memory/1832-52-0x0000000007D80000-0x000000000818B000-memory.dmp

        Filesize

        4.0MB

      • memory/1832-16-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

        Filesize

        84KB

      • memory/1832-17-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

        Filesize

        84KB

      • memory/1832-18-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

        Filesize

        84KB

      • memory/1832-20-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

        Filesize

        84KB

      • memory/1832-21-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB

      • memory/1832-24-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB

      • memory/1832-25-0x0000000002550000-0x0000000002556000-memory.dmp

        Filesize

        24KB

      • memory/1832-28-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-31-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-32-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-33-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-34-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-11-0x0000000000FA0000-0x0000000000FB5000-memory.dmp

        Filesize

        84KB

      • memory/1832-35-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-37-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-38-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-40-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-39-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-41-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-51-0x00000000025F0000-0x00000000025F5000-memory.dmp

        Filesize

        20KB

      • memory/1832-44-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-45-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-42-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-46-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-47-0x0000000002560000-0x0000000002570000-memory.dmp

        Filesize

        64KB

      • memory/1832-48-0x00000000025F0000-0x00000000025F5000-memory.dmp

        Filesize

        20KB

      • memory/5092-9-0x00000000024E0000-0x00000000025E0000-memory.dmp

        Filesize

        1024KB

      • memory/5092-14-0x0000000000400000-0x00000000022E6000-memory.dmp

        Filesize

        30.9MB

      • memory/5092-15-0x0000000000400000-0x00000000022E6000-memory.dmp

        Filesize

        30.9MB

      • memory/5092-10-0x0000000002BB0000-0x0000000002BC3000-memory.dmp

        Filesize

        76KB