Analysis

  • max time kernel
    82s
  • max time network
    149s
  • platform
    windows10_x64
  • resource
    win10-en
  • submitted
    20/09/2021, 12:26

General

  • Target
    f6200b9b9789794de4a8d78f4ae96d22.exe
  • Size 292KB
  • Sample210920-pl66qaggdk
  • SHA256 85f0af15d708b6a2ea67a30f2a858efc9f32af678a5633289c297f588443cd7a
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • xpertrat

Version
  • 3.0.10

Botnet
  • Test

C2
  • kapasky-antivirus.firewall-gateway.net:4000

Mutex
  • L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0

Signatures

  • UAC bypass 3 TTPs
  • Windows security bypass 2 TTPs
  • XpertRAT

    XpertRAT is a remote access trojan with various capabilities.

  • XpertRAT Core Payload 1 IoCs
  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Deletes itself 1 IoCs
  • Windows security modification 2 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Program crash 3 IoCs
  • Suspicious use of SetThreadContext 10 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f6200b9b9789794de4a8d78f4ae96d22.exe
    "C:\Users\Admin\AppData\Local\Temp\f6200b9b9789794de4a8d78f4ae96d22.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:3388
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection www.google.com
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3928
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection www.bing.com
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3888
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection www.facebook.com
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3584
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-Connection www.twitter.com
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:3032
    • C:\Users\Admin\AppData\Local\Temp\f6200b9b9789794de4a8d78f4ae96d22.exe
      C:\Users\Admin\AppData\Local\Temp\f6200b9b9789794de4a8d78f4ae96d22.exe
      2⤵
        PID:4716
      • C:\Users\Admin\AppData\Local\Temp\f6200b9b9789794de4a8d78f4ae96d22.exe
        C:\Users\Admin\AppData\Local\Temp\f6200b9b9789794de4a8d78f4ae96d22.exe
        2⤵
        • Windows security modification
        • Checks whether UAC is enabled
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:4720
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          C:\Users\Admin\AppData\Local\Temp\f6200b9b9789794de4a8d78f4ae96d22.exe
          3⤵
          • Adds policy Run key to start application
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:4764
          • C:\Windows\SysWOW64\notepad.exe
            notepad.exe
            4⤵
            • Deletes itself
            PID:1016
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\ykgleybck0.txt"
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:4784
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\ykgleybck1.txt"
            4⤵
              PID:4796
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 4796 -s 92
                5⤵
                • Program crash
                PID:1304
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\ykgleybck1.txt"
              4⤵
                PID:4828
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\ykgleybck2.txt"
                4⤵
                  PID:4860
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 4860 -s 92
                    5⤵
                    • Program crash
                    PID:1436
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\ykgleybck2.txt"
                  4⤵
                    PID:4876
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -u -p 4876 -s 92
                      5⤵
                      • Program crash
                      PID:4884
                  • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                    /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\ykgleybck2.txt"
                    4⤵
                    • Suspicious behavior: EnumeratesProcesses
                    PID:1600
                  • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                    /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\ykgleybck3.txt"
                    4⤵
                      PID:1672
                    • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\ykgleybck4.txt"
                      4⤵
                        PID:1824

                Network

                      MITRE ATT&CK Enterprise v6

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

                      memory/3032-455-0x0000000001033000-0x0000000001034000-memory.dmp

                      memory/3032-413-0x0000000001030000-0x0000000001031000-memory.dmp

                      memory/3032-415-0x0000000001032000-0x0000000001033000-memory.dmp

                      memory/3388-505-0x0000000006F10000-0x0000000006F56000-memory.dmp

                      memory/3388-119-0x0000000004B70000-0x0000000004B71000-memory.dmp

                      memory/3388-115-0x00000000002E0000-0x00000000002E1000-memory.dmp

                      memory/3388-506-0x0000000005010000-0x0000000005040000-memory.dmp

                      memory/3388-120-0x0000000004B00000-0x0000000004B01000-memory.dmp

                      memory/3388-118-0x0000000004BE0000-0x0000000004BE1000-memory.dmp

                      memory/3388-117-0x0000000005040000-0x0000000005041000-memory.dmp

                      memory/3584-139-0x0000000006B40000-0x0000000006B41000-memory.dmp

                      memory/3584-154-0x0000000007A10000-0x0000000007A11000-memory.dmp

                      memory/3584-151-0x0000000007580000-0x0000000007581000-memory.dmp

                      memory/3584-144-0x0000000000E52000-0x0000000000E53000-memory.dmp

                      memory/3584-138-0x0000000000E50000-0x0000000000E51000-memory.dmp

                      memory/3584-209-0x0000000000E53000-0x0000000000E54000-memory.dmp

                      memory/3888-208-0x0000000006BA3000-0x0000000006BA4000-memory.dmp

                      memory/3888-142-0x0000000006BA2000-0x0000000006BA3000-memory.dmp

                      memory/3888-160-0x00000000082E0000-0x00000000082E1000-memory.dmp

                      memory/3888-136-0x0000000006BA0000-0x0000000006BA1000-memory.dmp

                      memory/3888-148-0x0000000007A90000-0x0000000007A91000-memory.dmp

                      memory/3888-145-0x00000000079B0000-0x00000000079B1000-memory.dmp

                      memory/3928-157-0x00000000089F0000-0x00000000089F1000-memory.dmp

                      memory/3928-133-0x0000000007940000-0x0000000007941000-memory.dmp

                      memory/3928-210-0x0000000007303000-0x0000000007304000-memory.dmp

                      memory/3928-205-0x000000000A9D0000-0x000000000A9D1000-memory.dmp

                      memory/3928-137-0x0000000007300000-0x0000000007301000-memory.dmp

                      memory/3928-143-0x0000000007302000-0x0000000007303000-memory.dmp

                      memory/3928-171-0x00000000098B0000-0x00000000098B1000-memory.dmp

                      memory/3928-176-0x00000000095A0000-0x00000000095A1000-memory.dmp

                      memory/3928-179-0x00000000095C0000-0x00000000095C1000-memory.dmp

                      memory/3928-130-0x0000000004D80000-0x0000000004D81000-memory.dmp

                      memory/4720-507-0x0000000000400000-0x000000000042C000-memory.dmp

                      memory/4720-511-0x0000000000400000-0x000000000042C000-memory.dmp