Analysis

  • max time kernel
    145s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    08-07-2024 15:22

General

  • Target

    SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe

  • Size

    165KB

  • MD5

    56781772c92e1822beec9faee18fadc9

  • SHA1

    889af8e28ecda1df1e79c1f4abe533959b29a9db

  • SHA256

    4f0a6b89e63437c52a7adf09a15950b3ba5b9d1d7c8791a8559721ae24875894

  • SHA512

    7a46f160e3881578c8991ed07a746696738eb994b8f161796ef87081d1d6345927149f168197300750862564b672abaf522db193aa43d980aeef2abd115a460f

  • SSDEEP

    3072:jJLNXOgUQ4IiNpjhmD/Sc11y5Td0Cfq/UVwE7wQWLc:NLNXXUki1mTUmH

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).

  • 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\SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe
    "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2468
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\anoyaecy\
      2⤵
        PID:2720
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dtpezrpx.exe" C:\Windows\SysWOW64\anoyaecy\
        2⤵
          PID:2268
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create anoyaecy binPath= "C:\Windows\SysWOW64\anoyaecy\dtpezrpx.exe /d\"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:2828
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description anoyaecy "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2784
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start anoyaecy
          2⤵
          • Launches sc.exe
          PID:2744
        • 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:2396
      • C:\Windows\SysWOW64\anoyaecy\dtpezrpx.exe
        C:\Windows\SysWOW64\anoyaecy\dtpezrpx.exe /d"C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.Win32.CrypterX-gen.13041.27911.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:3052
        • 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:2684

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\dtpezrpx.exe
        Filesize

        12.8MB

        MD5

        ee619c44503ac142599a68d03e30feef

        SHA1

        58d730ad7c91d2d30c5236dd041ad2d8ea98e50f

        SHA256

        a6f613c8351533a743d0b7119978ed5874b4cf658167a8b2d6955d1b68cfd366

        SHA512

        1dc56ac8b13dda00bb4ffe14837f64db1fd5c799d17312fc4f78884500bd7bd8686a2d913289fd61038e70a6876461efb79c6daaacb7d3b5c77ca1b7f97cdc18

      • memory/2468-1-0x0000000000580000-0x0000000000680000-memory.dmp
        Filesize

        1024KB

      • memory/2468-2-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2468-3-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2468-8-0x0000000000400000-0x0000000000415000-memory.dmp
        Filesize

        84KB

      • memory/2468-7-0x0000000000220000-0x0000000000233000-memory.dmp
        Filesize

        76KB

      • memory/2468-6-0x0000000000400000-0x00000000004C4000-memory.dmp
        Filesize

        784KB

      • memory/2684-54-0x0000000005660000-0x0000000005A6B000-memory.dmp
        Filesize

        4.0MB

      • memory/2684-45-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-14-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2684-11-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2684-23-0x0000000001920000-0x0000000001B2F000-memory.dmp
        Filesize

        2.1MB

      • memory/2684-18-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2684-20-0x0000000001920000-0x0000000001B2F000-memory.dmp
        Filesize

        2.1MB

      • memory/2684-27-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-24-0x0000000000080000-0x0000000000086000-memory.dmp
        Filesize

        24KB

      • memory/2684-52-0x0000000005660000-0x0000000005A6B000-memory.dmp
        Filesize

        4.0MB

      • memory/2684-55-0x0000000000200000-0x0000000000207000-memory.dmp
        Filesize

        28KB

      • memory/2684-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp
        Filesize

        4KB

      • memory/2684-50-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/2684-47-0x00000000001B0000-0x00000000001B5000-memory.dmp
        Filesize

        20KB

      • memory/2684-46-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-16-0x0000000000110000-0x0000000000125000-memory.dmp
        Filesize

        84KB

      • memory/2684-44-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-43-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-42-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-41-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-40-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-39-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-38-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-37-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-36-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-35-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-34-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-33-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-32-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-31-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/2684-30-0x00000000001A0000-0x00000000001B0000-memory.dmp
        Filesize

        64KB

      • memory/3052-17-0x0000000000400000-0x00000000004C4000-memory.dmp
        Filesize

        784KB