Analysis

  • max time kernel
    163s
  • max time network
    169s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/11/2022, 00:09

General

  • Target
    8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac.exe
  • Size 820KB
  • Sample221124-afn1maec73
  • SHA256 8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • cybergate

Version
  • v1.02.1

Botnet
  • kurbanx

C2
  • mastercity.no-ip.biz:81

Mutex
  • 5E1C6MH826FX

Attributes
  • enable_keylogger

    true

  • enable_message_box

    false

  • ftp_directory

    ./

  • ftp_interval

    30

  • injected_process

    explorer.exe

  • install_dir

    install

  • install_file

    explore.exe

  • install_flag

    true

  • keylogger_enable_ftp

    false

  • message_box_caption

    www.CryptoSuite.com / YLN

  • message_box_title

    CryptoSuite

  • password

    yln12345

  • regkey_hkcu

    HKCU

  • regkey_hklm

    HKLM

Signatures

  • CyberGate, Rebhip

    CyberGate is a lightweight remote administration tool with a wide array of functionalities.

  • Adds policy Run key to start application 2 TTPs 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Modifies Installed Components in the registry 2 TTPs 4 IoCs
  • UPX packed file 18 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Adds Run key to start application 2 TTPs 4 IoCs
  • Drops file in System32 directory 4 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:760
      • C:\Users\Admin\AppData\Local\Temp\8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac.exe
        "C:\Users\Admin\AppData\Local\Temp\8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:5080
        • C:\Users\Admin\AppData\Local\Temp\8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac.exe
          C:\Users\Admin\AppData\Local\Temp\8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac.exe
          3⤵
          • Adds policy Run key to start application
          • Modifies Installed Components in the registry
          • Adds Run key to start application
          • Drops file in System32 directory
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of WriteProcessMemory
          PID:1540
          • C:\Windows\SysWOW64\explorer.exe
            explorer.exe
            4⤵
            • Modifies Installed Components in the registry
            PID:1548
          • C:\Program Files\Internet Explorer\iexplore.exe
            "C:\Program Files\Internet Explorer\iexplore.exe"
            4⤵
              PID:4444
            • C:\Users\Admin\AppData\Local\Temp\8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac.exe
              "C:\Users\Admin\AppData\Local\Temp\8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac.exe"
              4⤵
              • Checks computer location settings
              • Drops file in System32 directory
              • Modifies registry class
              • Suspicious behavior: GetForegroundWindowSpam
              • Suspicious use of AdjustPrivilegeToken
              PID:4744
              • C:\Windows\SysWOW64\install\explore.exe
                "C:\Windows\system32\install\explore.exe"
                5⤵
                • Executes dropped EXE
                • Suspicious use of SetThreadContext
                • Suspicious use of SetWindowsHookEx
                PID:4348
                • C:\Windows\SysWOW64\install\explore.exe
                  C:\Windows\SysWOW64\install\explore.exe
                  6⤵
                  • Executes dropped EXE
                  PID:3596

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            XX--XX--XX.txt

            • Path C:\Users\Admin\AppData\Local\Temp\XX--XX--XX.txt
            • Size 221KB
            • SHA256 026203d2dba6e0d81310a039716c1d1f457331f807ec6c01adf140671bafbfaa
            • MD5 SHA1 SHA512 SSDEEP

            explore.exe

            • Path C:\Windows\SysWOW64\install\explore.exe
            • Size 820KB
            • SHA256 8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac
            • MD5 SHA1 SHA512 SSDEEP

            explore.exe

            • Path C:\Windows\SysWOW64\install\explore.exe
            • Size 820KB
            • SHA256 8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac
            • MD5 SHA1 SHA512 SSDEEP

            explore.exe

            • Path C:\Windows\SysWOW64\install\explore.exe
            • Size 820KB
            • SHA256 8589fcd4e28bf0c2a9dfc64f5e349f60ffab1e76d6559c11dbbba84832e571ac
            • MD5 SHA1 SHA512 SSDEEP

            memory/1540-138-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/1540-141-0x0000000024010000-0x0000000024070000-memory.dmp

            memory/1540-146-0x0000000024070000-0x00000000240D0000-memory.dmp

            memory/1540-139-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/1540-159-0x0000000024130000-0x0000000024190000-memory.dmp

            memory/1540-137-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/1540-135-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/1540-154-0x00000000240D0000-0x0000000024130000-memory.dmp

            memory/1540-163-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/1548-152-0x0000000024070000-0x00000000240D0000-memory.dmp

            memory/1548-149-0x0000000024070000-0x00000000240D0000-memory.dmp

            memory/3596-173-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/3596-174-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/3596-175-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/3596-176-0x0000000000400000-0x0000000000455000-memory.dmp

            memory/4744-162-0x0000000024130000-0x0000000024190000-memory.dmp

            memory/4744-164-0x0000000024130000-0x0000000024190000-memory.dmp

            memory/4744-177-0x0000000024130000-0x0000000024190000-memory.dmp