Analysis

  • max time kernel
    142s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7
  • submitted
    12/10/2020, 09:46

General

  • Target
    RFQ_PO_7645321875.exe
  • Size 261KB
  • Sample201012-rcpgfvgr9e
  • SHA256 ff9d837e464eb07ad603c0b2ac0a35029117123c31570baeb61fca9a0242b493
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • xpertrat

Version
  • 3.0.10

Botnet
  • special X

C2
  • sandshoe.myfirewall.org:4000

Mutex
  • K8Q3I007-I4H2-R2V0-W0G8-T1Q3K5W771L5

Signatures

  • 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 MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 11 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 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 13 IoCs
  • Suspicious use of SetThreadContext 7 IoCs
  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 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\RFQ_PO_7645321875.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ_PO_7645321875.exe"
    1⤵
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1768
    • C:\Windows\SysWOW64\timeout.exe
      timeout 4
      2⤵
      • Delays execution with timeout.exe
      PID:1276
    • C:\Users\Admin\AppData\Local\Temp\RFQ_PO_7645321875.exe
      "C:\Users\Admin\AppData\Local\Temp\RFQ_PO_7645321875.exe"
      2⤵
        PID:280
      • C:\Users\Admin\AppData\Local\Temp\RFQ_PO_7645321875.exe
        "C:\Users\Admin\AppData\Local\Temp\RFQ_PO_7645321875.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:316
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          C:\Users\Admin\AppData\Local\Temp\RFQ_PO_7645321875.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:1100
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\K8Q3I007-I4H2-R2V0-W0G8-T1Q3K5W771L5\uwsknmuqn0.txt"
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:1692
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\K8Q3I007-I4H2-R2V0-W0G8-T1Q3K5W771L5\uwsknmuqn1.txt"
            4⤵
              PID:1636
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\K8Q3I007-I4H2-R2V0-W0G8-T1Q3K5W771L5\uwsknmuqn2.txt"
              4⤵
                PID:612
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\K8Q3I007-I4H2-R2V0-W0G8-T1Q3K5W771L5\uwsknmuqn3.txt"
                4⤵
                  PID:688
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\K8Q3I007-I4H2-R2V0-W0G8-T1Q3K5W771L5\uwsknmuqn4.txt"
                  4⤵
                    PID:304

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  memory/304-33-0x0000000000400000-0x0000000000415000-memory.dmp

                  memory/304-31-0x0000000000400000-0x0000000000415000-memory.dmp

                  memory/316-4-0x0000000000400000-0x000000000042C000-memory.dmp

                  memory/316-20-0x0000000000340000-0x0000000000344000-memory.dmp

                  memory/316-21-0x00000000029F0000-0x00000000029F4000-memory.dmp

                  memory/612-25-0x0000000000400000-0x0000000000459000-memory.dmp

                  memory/612-23-0x0000000000400000-0x0000000000459000-memory.dmp

                  memory/688-27-0x0000000000400000-0x0000000000416000-memory.dmp

                  memory/688-29-0x0000000000400000-0x0000000000416000-memory.dmp

                  memory/688-30-0x0000000000400000-0x0000000000416000-memory.dmp

                  memory/1100-11-0x0000000000400000-0x0000000000443000-memory.dmp

                  memory/1100-9-0x0000000000400000-0x0000000000443000-memory.dmp

                  memory/1636-18-0x0000000000400000-0x000000000041B000-memory.dmp

                  memory/1636-22-0x0000000000400000-0x000000000041B000-memory.dmp

                  memory/1692-17-0x0000000000400000-0x0000000000426000-memory.dmp

                  memory/1692-14-0x0000000000400000-0x0000000000426000-memory.dmp

                  memory/1692-16-0x0000000000400000-0x0000000000426000-memory.dmp

                  memory/1768-0-0x0000000074480000-0x0000000074B6E000-memory.dmp

                  memory/1768-3-0x0000000000360000-0x0000000000399000-memory.dmp

                  memory/1768-1-0x00000000001B0000-0x00000000001B1000-memory.dmp