Analysis

  • max time kernel
    150s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7v20210410
  • submitted
    22-04-2021 10:26

General

  • Target

    00279cce20bb484f9ea1b89efc6be08e.exe

  • Size

    918KB

  • MD5

    00279cce20bb484f9ea1b89efc6be08e

  • SHA1

    da931ab637a622626fc2fb8a326fd6ccce931f66

  • SHA256

    877b28707372fb7365c52a314233c74877045cf1d8143fe83fb257f0bf90c248

  • SHA512

    f7c61894b3d07cfbd9ee4aaf2fecefd3096d28feb02c43a39cf809ab441b5a82c9ddb534992f1a0fc552d4eed1465a56782eeee73abc27ddb67c74b910d71508

Malware Config

Extracted

Family

xpertrat

Version

3.0.10

Botnet

XXX

C2

kapasky-antivirus.firewall-gateway.net:2054

kapasky-antivirus.firewall-gateway.net:4000

Mutex

U4G3L113-M7Y0-X0M5-M3D5-U8C7U551Q8Q7

Signatures

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

    XpertRAT is a remote access trojan with various capabilities.

  • XpertRAT Core Payload 2 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • UPX packed file 2 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 SetThreadContext 7 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 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\00279cce20bb484f9ea1b89efc6be08e.exe
    "C:\Users\Admin\AppData\Local\Temp\00279cce20bb484f9ea1b89efc6be08e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1040
    • C:\Users\Admin\AppData\Local\Temp\00279cce20bb484f9ea1b89efc6be08e.exe
      "{path}"
      2⤵
        PID:1232
      • C:\Users\Admin\AppData\Local\Temp\00279cce20bb484f9ea1b89efc6be08e.exe
        "{path}"
        2⤵
          PID:1060
        • C:\Users\Admin\AppData\Local\Temp\00279cce20bb484f9ea1b89efc6be08e.exe
          "{path}"
          2⤵
            PID:1352
          • C:\Users\Admin\AppData\Local\Temp\00279cce20bb484f9ea1b89efc6be08e.exe
            "{path}"
            2⤵
              PID:432
            • C:\Users\Admin\AppData\Local\Temp\00279cce20bb484f9ea1b89efc6be08e.exe
              "{path}"
              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:924
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                C:\Users\Admin\AppData\Local\Temp\00279cce20bb484f9ea1b89efc6be08e.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:1464
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\U4G3L113-M7Y0-X0M5-M3D5-U8C7U551Q8Q7\rclxtkfwh0.txt"
                  4⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:1560
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\U4G3L113-M7Y0-X0M5-M3D5-U8C7U551Q8Q7\rclxtkfwh1.txt"
                  4⤵
                    PID:664
                  • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                    /stext "C:\Users\Admin\AppData\Roaming\U4G3L113-M7Y0-X0M5-M3D5-U8C7U551Q8Q7\rclxtkfwh2.txt"
                    4⤵
                      PID:1140
                    • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                      /stext "C:\Users\Admin\AppData\Roaming\U4G3L113-M7Y0-X0M5-M3D5-U8C7U551Q8Q7\rclxtkfwh3.txt"
                      4⤵
                        PID:1852
                      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                        /stext "C:\Users\Admin\AppData\Roaming\U4G3L113-M7Y0-X0M5-M3D5-U8C7U551Q8Q7\rclxtkfwh4.txt"
                        4⤵
                          PID:1604

                  Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

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                  Downloads

                  • C:\Users\Admin\AppData\Roaming\U4G3L113-M7Y0-X0M5-M3D5-U8C7U551Q8Q7\rclxtkfwh2.txt

                    MD5

                    f3b25701fe362ec84616a93a45ce9998

                    SHA1

                    d62636d8caec13f04e28442a0a6fa1afeb024bbb

                    SHA256

                    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

                    SHA512

                    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

                  • C:\Users\Admin\AppData\Roaming\U4G3L113-M7Y0-X0M5-M3D5-U8C7U551Q8Q7\rclxtkfwh4.txt

                    MD5

                    f3b25701fe362ec84616a93a45ce9998

                    SHA1

                    d62636d8caec13f04e28442a0a6fa1afeb024bbb

                    SHA256

                    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

                    SHA512

                    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

                  • memory/664-79-0x0000000000400000-0x000000000041B000-memory.dmp

                    Filesize

                    108KB

                  • memory/664-80-0x0000000000411654-mapping.dmp

                  • memory/924-65-0x0000000000400000-0x000000000042C000-memory.dmp

                    Filesize

                    176KB

                  • memory/924-66-0x00000000004010B8-mapping.dmp

                  • memory/1040-61-0x0000000004C80000-0x0000000004C81000-memory.dmp

                    Filesize

                    4KB

                  • memory/1040-62-0x0000000000480000-0x000000000048E000-memory.dmp

                    Filesize

                    56KB

                  • memory/1040-63-0x0000000005770000-0x000000000584E000-memory.dmp

                    Filesize

                    888KB

                  • memory/1040-64-0x0000000000720000-0x00000000007B0000-memory.dmp

                    Filesize

                    576KB

                  • memory/1040-59-0x0000000000140000-0x0000000000141000-memory.dmp

                    Filesize

                    4KB

                  • memory/1140-82-0x0000000000400000-0x0000000000459000-memory.dmp

                    Filesize

                    356KB

                  • memory/1140-83-0x0000000000442F04-mapping.dmp

                  • memory/1464-75-0x0000000074F31000-0x0000000074F33000-memory.dmp

                    Filesize

                    8KB

                  • memory/1464-71-0x0000000000130000-0x0000000000283000-memory.dmp

                    Filesize

                    1.3MB

                  • memory/1464-70-0x0000000000401364-mapping.dmp

                  • memory/1464-69-0x0000000000400000-0x0000000000443000-memory.dmp

                    Filesize

                    268KB

                  • memory/1560-76-0x0000000000400000-0x0000000000426000-memory.dmp

                    Filesize

                    152KB

                  • memory/1560-77-0x0000000000423BC0-mapping.dmp

                  • memory/1604-89-0x0000000000400000-0x0000000000415000-memory.dmp

                    Filesize

                    84KB

                  • memory/1604-90-0x000000000040C2A8-mapping.dmp

                  • memory/1852-87-0x0000000000413750-mapping.dmp

                  • memory/1852-86-0x0000000000400000-0x0000000000416000-memory.dmp

                    Filesize

                    88KB