Analysis

  • max time kernel
    121s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    20-12-2021 21:33

General

  • Target

    5f38c61d58d0d5522178242d87339de0.exe

  • Size

    531KB

  • MD5

    5f38c61d58d0d5522178242d87339de0

  • SHA1

    98a281508114a6af38e4a4df1d5c0b14e1d20287

  • SHA256

    4249f5106c811376877169cfb829b5274dc840e6487e34c690c0e6511a8149d1

  • SHA512

    ef8477aa4f80211dfad3a7935ce059b584c269a7d85210e38bcc372b8b2b6bc62d13ad2dda67b82dfb727b91a3dcc06f63580201ac18fa0f7589572a5b7d615b

Malware Config

Signatures

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

    XpertRAT is a remote access trojan with various capabilities.

  • Looks for VirtualBox Guest Additions in registry 2 TTPs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Looks for VMWare Tools registry key 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Windows security modification 2 TTPs 1 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Maps connected drives based on registry 3 TTPs 2 IoCs

    Disk information is often read in order to detect sandboxing environments.

  • Suspicious use of SetThreadContext 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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\5f38c61d58d0d5522178242d87339de0.exe
    "C:\Users\Admin\AppData\Local\Temp\5f38c61d58d0d5522178242d87339de0.exe"
    1⤵
    • Checks BIOS information in registry
    • Maps connected drives based on registry
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1672
    • C:\Users\Admin\AppData\Local\Temp\5f38c61d58d0d5522178242d87339de0.exe
      "C:\Users\Admin\AppData\Local\Temp\5f38c61d58d0d5522178242d87339de0.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:788
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        C:\Users\Admin\AppData\Local\Temp\5f38c61d58d0d5522178242d87339de0.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:1156
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          /stext "C:\Users\Admin\AppData\Roaming\R0W4O1A8-P5N3-X331-D1M0-B2W4Q6D8D2R6\sxehxdjgs0.txt"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:940
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          /stext "C:\Users\Admin\AppData\Roaming\R0W4O1A8-P5N3-X331-D1M0-B2W4Q6D8D2R6\sxehxdjgs1.txt"
          4⤵
          • Accesses Microsoft Outlook accounts
          PID:1772
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          /stext "C:\Users\Admin\AppData\Roaming\R0W4O1A8-P5N3-X331-D1M0-B2W4Q6D8D2R6\sxehxdjgs2.txt"
          4⤵
            PID:1660
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\R0W4O1A8-P5N3-X331-D1M0-B2W4Q6D8D2R6\sxehxdjgs3.txt"
            4⤵
              PID:572
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\R0W4O1A8-P5N3-X331-D1M0-B2W4Q6D8D2R6\sxehxdjgs4.txt"
              4⤵
                PID:1636

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Roaming\R0W4O1A8-P5N3-X331-D1M0-B2W4Q6D8D2R6\sxehxdjgs2.txt
          MD5

          f3b25701fe362ec84616a93a45ce9998

          SHA1

          d62636d8caec13f04e28442a0a6fa1afeb024bbb

          SHA256

          b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

          SHA512

          98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

        • C:\Users\Admin\AppData\Roaming\R0W4O1A8-P5N3-X331-D1M0-B2W4Q6D8D2R6\sxehxdjgs4.txt
          MD5

          f3b25701fe362ec84616a93a45ce9998

          SHA1

          d62636d8caec13f04e28442a0a6fa1afeb024bbb

          SHA256

          b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

          SHA512

          98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

        • memory/572-73-0x0000000000413750-mapping.dmp
        • memory/788-66-0x00000000000F0000-0x00000000000F6000-memory.dmp
          Filesize

          24KB

        • memory/788-67-0x00000000000F0000-0x00000000000FA000-memory.dmp
          Filesize

          40KB

        • memory/788-61-0x0000000000400000-0x000000000042C000-memory.dmp
          Filesize

          176KB

        • memory/788-62-0x0000000000400000-0x000000000042C000-memory.dmp
          Filesize

          176KB

        • memory/788-63-0x0000000000400000-0x000000000042C000-memory.dmp
          Filesize

          176KB

        • memory/788-64-0x0000000000400000-0x000000000042C000-memory.dmp
          Filesize

          176KB

        • memory/788-65-0x00000000004010B8-mapping.dmp
        • memory/940-69-0x0000000000423BC0-mapping.dmp
        • memory/1156-68-0x0000000000401364-mapping.dmp
        • memory/1636-74-0x000000000040C2A8-mapping.dmp
        • memory/1660-71-0x0000000000442F04-mapping.dmp
        • memory/1672-60-0x0000000004BD0000-0x0000000004C2B000-memory.dmp
          Filesize

          364KB

        • memory/1672-55-0x0000000000BE0000-0x0000000000BE1000-memory.dmp
          Filesize

          4KB

        • memory/1672-59-0x00000000009B0000-0x00000000009B8000-memory.dmp
          Filesize

          32KB

        • memory/1672-58-0x0000000004C60000-0x0000000004C61000-memory.dmp
          Filesize

          4KB

        • memory/1672-57-0x0000000076641000-0x0000000076643000-memory.dmp
          Filesize

          8KB

        • memory/1772-70-0x0000000000411654-mapping.dmp