Analysis

  • max time kernel
    97s
  • max time network
    140s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    07/10/2021, 12:07

General

  • Target
    4ef7b35bd9151fc5538c06ae79a0e2fc.exe
  • Size 1.4MB
  • Sample211007-pabwfacegj
  • SHA256 3e77ec2e0bbc394a1841bfb8f9b004f93fcbc35b401580abd01c92c41b6635aa
  • 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 4 IoCs
  • Suspicious use of SetThreadContext 11 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 30 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\4ef7b35bd9151fc5538c06ae79a0e2fc.exe
    "C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:656
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-NetConnection -TraceRoute twitter.com
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4012
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-NetConnection -TraceRoute twitter.com
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:768
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Test-NetConnection -TraceRoute twitter.com
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      PID:2796
    • C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.exe
      C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.exe
      2⤵
        PID:3940
      • C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.exe
        C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.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:2248
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.exe
          3⤵
            PID:3460
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 3460 -s 92
              4⤵
              • Program crash
              PID:2356
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.exe
            3⤵
              PID:1544
              • C:\Windows\SysWOW64\WerFault.exe
                C:\Windows\SysWOW64\WerFault.exe -u -p 1544 -s 92
                4⤵
                • Program crash
                PID:2100
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.exe
              3⤵
                PID:3008
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 3008 -s 92
                  4⤵
                  • Program crash
                  PID:1608
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                C:\Users\Admin\AppData\Local\Temp\4ef7b35bd9151fc5538c06ae79a0e2fc.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:1592
                • C:\Windows\SysWOW64\notepad.exe
                  notepad.exe
                  4⤵
                  • Deletes itself
                  PID:1060
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\hvmggfrsb0.txt"
                  4⤵
                  • Suspicious behavior: EnumeratesProcesses
                  PID:1308
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\hvmggfrsb1.txt"
                  4⤵
                    PID:2524
                    • C:\Windows\SysWOW64\WerFault.exe
                      C:\Windows\SysWOW64\WerFault.exe -u -p 2524 -s 92
                      5⤵
                      • Program crash
                      PID:2236
                  • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                    /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\hvmggfrsb1.txt"
                    4⤵
                      PID:368
                    • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\hvmggfrsb2.txt"
                      4⤵
                      • Suspicious behavior: EnumeratesProcesses
                      PID:2144
                    • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                      /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\hvmggfrsb3.txt"
                      4⤵
                        PID:2536
                      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                        /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\hvmggfrsb4.txt"
                        4⤵
                          PID:2308

                  Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

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                        Downloads

                        memory/656-114-0x0000000000EF0000-0x0000000000EF1000-memory.dmp

                        memory/656-1632-0x0000000001700000-0x0000000001701000-memory.dmp

                        memory/768-1038-0x0000000000946000-0x0000000000947000-memory.dmp

                        memory/768-749-0x0000000000944000-0x0000000000946000-memory.dmp

                        memory/768-747-0x0000000000943000-0x0000000000944000-memory.dmp

                        memory/768-691-0x0000000000942000-0x0000000000943000-memory.dmp

                        memory/768-690-0x0000000000940000-0x0000000000941000-memory.dmp

                        memory/2248-1637-0x0000000000400000-0x000000000042C000-memory.dmp

                        memory/2796-1513-0x0000000000CD6000-0x0000000000CD7000-memory.dmp

                        memory/2796-1226-0x0000000000CD4000-0x0000000000CD6000-memory.dmp

                        memory/2796-1225-0x0000000000CD3000-0x0000000000CD4000-memory.dmp

                        memory/2796-1160-0x0000000000CD2000-0x0000000000CD3000-memory.dmp

                        memory/2796-1158-0x0000000000CD0000-0x0000000000CD1000-memory.dmp

                        memory/4012-150-0x0000000009970000-0x0000000009971000-memory.dmp

                        memory/4012-125-0x0000000007F00000-0x0000000007F01000-memory.dmp

                        memory/4012-137-0x0000000009840000-0x0000000009873000-memory.dmp

                        memory/4012-144-0x0000000008AF0000-0x0000000008AF1000-memory.dmp

                        memory/4012-149-0x000000007E490000-0x000000007E491000-memory.dmp

                        memory/4012-128-0x0000000008A80000-0x0000000008A81000-memory.dmp

                        memory/4012-392-0x0000000009BF0000-0x0000000009BF1000-memory.dmp

                        memory/4012-151-0x0000000004E63000-0x0000000004E64000-memory.dmp

                        memory/4012-152-0x0000000009B00000-0x0000000009B01000-memory.dmp

                        memory/4012-127-0x0000000007FB0000-0x0000000007FB1000-memory.dmp

                        memory/4012-126-0x0000000008150000-0x0000000008151000-memory.dmp

                        memory/4012-380-0x000000000B2A0000-0x000000000B2A1000-memory.dmp

                        memory/4012-381-0x000000000AC40000-0x000000000AC41000-memory.dmp

                        memory/4012-129-0x0000000008790000-0x0000000008791000-memory.dmp

                        memory/4012-570-0x0000000009BD0000-0x0000000009BD1000-memory.dmp

                        memory/4012-124-0x0000000007720000-0x0000000007721000-memory.dmp

                        memory/4012-123-0x0000000007580000-0x0000000007581000-memory.dmp

                        memory/4012-121-0x0000000004E60000-0x0000000004E61000-memory.dmp

                        memory/4012-561-0x0000000004E66000-0x0000000004E68000-memory.dmp

                        memory/4012-122-0x0000000004E62000-0x0000000004E63000-memory.dmp

                        memory/4012-120-0x0000000007860000-0x0000000007861000-memory.dmp

                        memory/4012-119-0x0000000004D30000-0x0000000004D31000-memory.dmp

                        memory/4012-551-0x000000000AE10000-0x000000000AE11000-memory.dmp

                        memory/4012-468-0x000000000ACC0000-0x000000000ACC1000-memory.dmp