Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    20-06-2024 08:29

General

  • Target

    6175a58c579f7af51d21cc02cdc2a85e6f9a9622b1134dc2b105118a82c19900.exe

  • Size

    11.8MB

  • MD5

    1115bd97b549ced1b9c74e08e534d655

  • SHA1

    274950f5a96e621e789ab887dd2218ee792937b2

  • SHA256

    6175a58c579f7af51d21cc02cdc2a85e6f9a9622b1134dc2b105118a82c19900

  • SHA512

    e12cf306376ccbc23498c7a9b1b5f5eb8a5976ad182484758187151322397e5211c25fa5829c02f6183534113630f8a11ff3e29cf51a02a2485f0750a7a48b29

  • SSDEEP

    12288:jsWR4IPuw0m+MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMn:4643w0

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
  • 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6175a58c579f7af51d21cc02cdc2a85e6f9a9622b1134dc2b105118a82c19900.exe
    "C:\Users\Admin\AppData\Local\Temp\6175a58c579f7af51d21cc02cdc2a85e6f9a9622b1134dc2b105118a82c19900.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2380
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\micagarz\
      2⤵
        PID:2224
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wuefhdgm.exe" C:\Windows\SysWOW64\micagarz\
        2⤵
          PID:2416
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create micagarz binPath= "C:\Windows\SysWOW64\micagarz\wuefhdgm.exe /d\"C:\Users\Admin\AppData\Local\Temp\6175a58c579f7af51d21cc02cdc2a85e6f9a9622b1134dc2b105118a82c19900.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2544
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description micagarz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2580
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start micagarz
          2⤵
          • Launches sc.exe
          PID:2712
        • 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
          • Event Triggered Execution: Netsh Helper DLL
          PID:2816
      • C:\Windows\SysWOW64\micagarz\wuefhdgm.exe
        C:\Windows\SysWOW64\micagarz\wuefhdgm.exe /d"C:\Users\Admin\AppData\Local\Temp\6175a58c579f7af51d21cc02cdc2a85e6f9a9622b1134dc2b105118a82c19900.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2608
        • 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 Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        12.2MB

        MD5

        cb095a643d6081dce1e87a67edd01aab

        SHA1

        f4bf55208ccff59c44ef8872e284b0078237f915

        SHA256

        2a6277ede99d1dffcb6f910ac1ec19d5c9e73f0fb259fb8611e76cc3ab7d70ed

        SHA512

        8f23a22fb8f2be90786ed870228bc57792b40a73adb5a9953982d97614b47a28c0699203283960db11687d7f048c55d910a3de50313db445070725cb42cbfaf8

      • memory/2380-15-0x0000000000230000-0x0000000000330000-memory.dmp

        Filesize

        1024KB

      • memory/2380-2-0x00000000003A0000-0x00000000003B3000-memory.dmp

        Filesize

        76KB

      • memory/2380-1-0x0000000000230000-0x0000000000330000-memory.dmp

        Filesize

        1024KB

      • memory/2380-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2380-16-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2380-14-0x0000000000400000-0x000000000068D000-memory.dmp

        Filesize

        2.6MB

      • memory/2608-12-0x0000000000400000-0x000000000068D000-memory.dmp

        Filesize

        2.6MB

      • memory/2612-55-0x0000000000250000-0x0000000000257000-memory.dmp

        Filesize

        28KB

      • memory/2612-45-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        Filesize

        4KB

      • memory/2612-17-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2612-18-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2612-23-0x00000000019F0000-0x0000000001BFF000-memory.dmp

        Filesize

        2.1MB

      • memory/2612-24-0x0000000000120000-0x0000000000126000-memory.dmp

        Filesize

        24KB

      • memory/2612-27-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-20-0x00000000019F0000-0x0000000001BFF000-memory.dmp

        Filesize

        2.1MB

      • memory/2612-54-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2612-11-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2612-52-0x0000000005540000-0x000000000594B000-memory.dmp

        Filesize

        4.0MB

      • memory/2612-50-0x0000000000180000-0x0000000000185000-memory.dmp

        Filesize

        20KB

      • memory/2612-47-0x0000000000180000-0x0000000000185000-memory.dmp

        Filesize

        20KB

      • memory/2612-46-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-8-0x0000000000080000-0x0000000000095000-memory.dmp

        Filesize

        84KB

      • memory/2612-44-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-43-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-42-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-41-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-40-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-39-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-38-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-37-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-36-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-35-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-34-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-33-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-32-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-31-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB

      • memory/2612-30-0x0000000000170000-0x0000000000180000-memory.dmp

        Filesize

        64KB