Analysis

  • max time kernel
    186s
  • max time network
    195s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/11/2022, 03:43

General

  • Target
    a85295f452462a75a350c1d2b821b784d940c3a10ede030d4f9e36d773e5e5cf.exe
  • Size 279KB
  • Sample221129-eaam9sfe6y
  • SHA256 a85295f452462a75a350c1d2b821b784d940c3a10ede030d4f9e36d773e5e5cf
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • UAC bypass 3 TTPs 2 IoCs
  • Blocklisted process makes network request 6 IoCs
  • Executes dropped EXE 2 IoCs
  • Modifies Windows Firewall 1 TTPs 2 IoCs
  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Drops startup file 3 IoCs
  • Loads dropped DLL 2 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 61 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • System policy modification 1 TTPs 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a85295f452462a75a350c1d2b821b784d940c3a10ede030d4f9e36d773e5e5cf.exe
    "C:\Users\Admin\AppData\Local\Temp\a85295f452462a75a350c1d2b821b784d940c3a10ede030d4f9e36d773e5e5cf.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4300
    • C:\Users\Admin\AppData\Local\Temp\fichier.exe
      "C:\Users\Admin\AppData\Local\Temp\fichier.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks computer location settings
      • Checks whether UAC is enabled
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1812
      • C:\Users\Admin\AppData\Roaming\Security.exe
        "C:\Users\Admin\AppData\Roaming\Security.exe"
        3⤵
        • UAC bypass
        • Executes dropped EXE
        • Checks computer location settings
        • Drops startup file
        • Adds Run key to start application
        • Checks whether UAC is enabled
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:960
        • C:\Windows\SysWOW64\netsh.exe
          netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\Security.exe" "Security.exe" ENABLE
          4⤵
          • Modifies Windows Firewall
          PID:3168
        • C:\Windows\SysWOW64\netsh.exe
          netsh firewall add allowedprogram "C:\Windows\SysWOW64\wscript.exe" "wscript.exe" ENABLE
          4⤵
          • Modifies Windows Firewall
          PID:4332
        • C:\Windows\SysWOW64\wscript.exe
          "C:\Windows\SysWOW64\wscript.exe" "C:\Users\Admin\AppData\Roaming\Security.vbe"
          4⤵
          • Blocklisted process makes network request
          • Drops startup file
          • Loads dropped DLL
          • Adds Run key to start application
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:1860

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        fichier.exe

        • Path C:\Users\Admin\AppData\Local\Temp\fichier.exe
        • Size 256KB
        • SHA256 956e6b0c6fbc449f93c823b1424e480ffae5b3c7287c8ff86d39ca3989f592fd
        • MD5 SHA1 SHA512 SSDEEP

        fichier.exe

        • Path C:\Users\Admin\AppData\Local\Temp\fichier.exe
        • Size 256KB
        • SHA256 956e6b0c6fbc449f93c823b1424e480ffae5b3c7287c8ff86d39ca3989f592fd
        • MD5 SHA1 SHA512 SSDEEP

        11b07949034f18fb99951822f750155d.exe

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\11b07949034f18fb99951822f750155d.exe
        • Size 256KB
        • SHA256 956e6b0c6fbc449f93c823b1424e480ffae5b3c7287c8ff86d39ca3989f592fd
        • MD5 SHA1 SHA512 SSDEEP

        Security.exe

        • Path C:\Users\Admin\AppData\Roaming\Security.exe
        • Size 256KB
        • SHA256 956e6b0c6fbc449f93c823b1424e480ffae5b3c7287c8ff86d39ca3989f592fd
        • MD5 SHA1 SHA512 SSDEEP

        Security.exe

        • Path C:\Users\Admin\AppData\Roaming\Security.exe
        • Size 256KB
        • SHA256 956e6b0c6fbc449f93c823b1424e480ffae5b3c7287c8ff86d39ca3989f592fd
        • MD5 SHA1 SHA512 SSDEEP

        Security.exe

        • Path C:\Users\Admin\AppData\Roaming\Security.exe
        • Size 256KB
        • SHA256 956e6b0c6fbc449f93c823b1424e480ffae5b3c7287c8ff86d39ca3989f592fd
        • MD5 SHA1 SHA512 SSDEEP

        Security.exe

        • Path C:\Users\Admin\AppData\Roaming\Security.exe
        • Size 256KB
        • SHA256 956e6b0c6fbc449f93c823b1424e480ffae5b3c7287c8ff86d39ca3989f592fd
        • MD5 SHA1 SHA512 SSDEEP

        Security.vbe

        • Path C:\Users\Admin\AppData\Roaming\Security.vbe
        • Size 54B
        • SHA256 dba7ef45a2eee2e644812afffaeb1693619ce14efe0e9dff28375c5947f9b502
        • MD5 SHA1 SHA512

        memory/960-144-0x0000000074E40000-0x00000000753F1000-memory.dmp

        memory/960-152-0x0000000074E40000-0x00000000753F1000-memory.dmp

        memory/1812-143-0x0000000074E40000-0x00000000753F1000-memory.dmp

        memory/1812-139-0x0000000074E40000-0x00000000753F1000-memory.dmp

        memory/1812-138-0x0000000074E40000-0x00000000753F1000-memory.dmp

        memory/1860-151-0x0000000074E40000-0x00000000753F1000-memory.dmp

        memory/1860-154-0x0000000074E40000-0x00000000753F1000-memory.dmp

        memory/4300-132-0x00000000001B0000-0x00000000001BC000-memory.dmp

        memory/4300-136-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp

        memory/4300-133-0x00007FF883FC0000-0x00007FF884A81000-memory.dmp