Analysis

  • max time kernel
    71s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7v200722
  • submitted
    08-09-2020 09:14

General

  • Target

    ExpertRat.exe

  • Size

    805KB

  • MD5

    0ca753d4699587ff19e0cd5719edaff8

  • SHA1

    d465c0b0f0d4aef7da057dcf5a9eefe5cf7e62ee

  • SHA256

    08927d7955b1be7fd05d81a73057242117540094dda7cca1c162f3aea18c2854

  • SHA512

    ba14ad1651c7b4aefcdec9096312c1ede3c9d11c82393d24c066da74d55f8a059be4ce3dcc1013fb0f06741cb1e2e8346d72860cf8d81214e9a0328ea7894567

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

win

C2

91.193.75.200:4726

Mutex

N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0

Signatures

  • Modifies Windows Defender Real-time Protection settings 3 TTPs
  • UAC bypass 3 TTPs
  • Windows security bypass 2 TTPs
  • XpertRAT

    XpertRAT is a remote access trojan with various capabilities.

  • XpertRAT Core Payload 3 IoCs
  • Nirsoft 2 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • UPX packed file 6 IoCs

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

  • Windows security modification 2 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 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\ExpertRat.exe
    "C:\Users\Admin\AppData\Local\Temp\ExpertRat.exe"
    1⤵
    • Windows security modification
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1036
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" Get-MpPreference -verbose
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1312
    • C:\Users\Admin\AppData\Local\Temp\ExpertRat.exe
      "C:\Users\Admin\AppData\Local\Temp\ExpertRat.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:1000
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        C:\Users\Admin\AppData\Local\Temp\ExpertRat.exe
        3⤵
        • Adds policy Run key to start application
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1120
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          /stext "C:\Users\Admin\AppData\Roaming\N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0\zlqtbzxls0.txt"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:912
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          /stext "C:\Users\Admin\AppData\Roaming\N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0\zlqtbzxls1.txt"
          4⤵
            PID:1488
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0\zlqtbzxls2.txt"
            4⤵
              PID:1744
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0\zlqtbzxls2.txt"
              4⤵
                PID:1848
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0\zlqtbzxls3.txt"
                4⤵
                  PID:1992
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0\zlqtbzxls4.txt"
                  4⤵
                    PID:1764

            Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Roaming\N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0\zlqtbzxls2.txt

              MD5

              f3b25701fe362ec84616a93a45ce9998

              SHA1

              d62636d8caec13f04e28442a0a6fa1afeb024bbb

              SHA256

              b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

              SHA512

              98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

            • C:\Users\Admin\AppData\Roaming\N3S7K4V2-L8C6-M6Q5-Y5I3-V6L7F1Y2X5G0\zlqtbzxls4.txt

              MD5

              f3b25701fe362ec84616a93a45ce9998

              SHA1

              d62636d8caec13f04e28442a0a6fa1afeb024bbb

              SHA256

              b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

              SHA512

              98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

            • memory/912-65-0x0000000000400000-0x0000000000426000-memory.dmp

              Filesize

              152KB

            • memory/912-68-0x0000000000400000-0x0000000000426000-memory.dmp

              Filesize

              152KB

            • memory/912-66-0x0000000000423BC0-mapping.dmp

            • memory/912-67-0x0000000000400000-0x0000000000426000-memory.dmp

              Filesize

              152KB

            • memory/1000-53-0x0000000000400000-0x000000000042C000-memory.dmp

              Filesize

              176KB

            • memory/1000-64-0x0000000002900000-0x0000000002904000-memory.dmp

              Filesize

              16KB

            • memory/1000-54-0x00000000004010B8-mapping.dmp

            • memory/1000-63-0x0000000000330000-0x0000000000334000-memory.dmp

              Filesize

              16KB

            • memory/1036-1-0x0000000000F90000-0x0000000000F91000-memory.dmp

              Filesize

              4KB

            • memory/1036-12-0x00000000006C0000-0x000000000070C000-memory.dmp

              Filesize

              304KB

            • memory/1036-0-0x0000000074700000-0x0000000074DEE000-memory.dmp

              Filesize

              6.9MB

            • memory/1036-11-0x0000000000370000-0x0000000000380000-memory.dmp

              Filesize

              64KB

            • memory/1036-9-0x00000000002F0000-0x0000000000300000-memory.dmp

              Filesize

              64KB

            • memory/1036-4-0x00000000002F0000-0x0000000000300000-memory.dmp

              Filesize

              64KB

            • memory/1036-13-0x00000000003D0000-0x00000000003D2000-memory.dmp

              Filesize

              8KB

            • memory/1036-3-0x0000000000620000-0x0000000000680000-memory.dmp

              Filesize

              384KB

            • memory/1036-14-0x0000000000540000-0x0000000000570000-memory.dmp

              Filesize

              192KB

            • memory/1120-60-0x0000000000400000-0x0000000000443000-memory.dmp

              Filesize

              268KB

            • memory/1120-59-0x0000000000401364-mapping.dmp

            • memory/1120-58-0x0000000000400000-0x0000000000443000-memory.dmp

              Filesize

              268KB

            • memory/1312-18-0x0000000004A90000-0x0000000004A91000-memory.dmp

              Filesize

              4KB

            • memory/1312-52-0x0000000006330000-0x0000000006331000-memory.dmp

              Filesize

              4KB

            • memory/1312-51-0x0000000006320000-0x0000000006321000-memory.dmp

              Filesize

              4KB

            • memory/1312-37-0x00000000055F0000-0x00000000055F1000-memory.dmp

              Filesize

              4KB

            • memory/1312-36-0x00000000062A0000-0x00000000062A1000-memory.dmp

              Filesize

              4KB

            • memory/1312-29-0x0000000006180000-0x0000000006181000-memory.dmp

              Filesize

              4KB

            • memory/1312-28-0x00000000060F0000-0x00000000060F1000-memory.dmp

              Filesize

              4KB

            • memory/1312-23-0x0000000005670000-0x0000000005671000-memory.dmp

              Filesize

              4KB

            • memory/1312-20-0x0000000002830000-0x0000000002831000-memory.dmp

              Filesize

              4KB

            • memory/1312-19-0x0000000002490000-0x0000000002491000-memory.dmp

              Filesize

              4KB

            • memory/1312-17-0x0000000000730000-0x0000000000731000-memory.dmp

              Filesize

              4KB

            • memory/1312-15-0x0000000000000000-mapping.dmp

            • memory/1312-16-0x0000000074700000-0x0000000074DEE000-memory.dmp

              Filesize

              6.9MB

            • memory/1488-71-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/1488-69-0x0000000000400000-0x000000000041B000-memory.dmp

              Filesize

              108KB

            • memory/1488-70-0x0000000000411654-mapping.dmp

            • memory/1744-73-0x0000000000442F04-mapping.dmp

            • memory/1764-82-0x0000000000400000-0x0000000000415000-memory.dmp

              Filesize

              84KB

            • memory/1764-84-0x0000000000400000-0x0000000000415000-memory.dmp

              Filesize

              84KB

            • memory/1764-83-0x000000000040C2A8-mapping.dmp

            • memory/1848-76-0x0000000000400000-0x0000000000459000-memory.dmp

              Filesize

              356KB

            • memory/1848-75-0x0000000000442F04-mapping.dmp

            • memory/1848-74-0x0000000000400000-0x0000000000459000-memory.dmp

              Filesize

              356KB

            • memory/1992-80-0x0000000000400000-0x0000000000416000-memory.dmp

              Filesize

              88KB

            • memory/1992-81-0x0000000000400000-0x0000000000416000-memory.dmp

              Filesize

              88KB

            • memory/1992-79-0x0000000000413750-mapping.dmp

            • memory/1992-78-0x0000000000400000-0x0000000000416000-memory.dmp

              Filesize

              88KB