Analysis

  • max time kernel
    141s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    14-02-2022 10:59

General

  • Target

    Presupuesto proyecto P3787-SHN Barcelona.pdf.exe

  • Size

    389KB

  • MD5

    889ae401a3acc4f824065ac0f47143b5

  • SHA1

    6f81823927158edf53d6b08d2d38dab356cba70e

  • SHA256

    69186bb77f81edb9bcc66a0382fe00944e6dc67982d61d37d7f0d2e32e92d727

  • SHA512

    128988c0047380512caa0d6d9c68f7571f06388d6862549675caeb21ddbe04e0b648e78f0ea0e90d7c516b33c91d2abe851503dc55cb842b24da7196ab7b1915

Malware Config

Signatures

  • Suspicious use of NtCreateProcessExOtherParentProcess 2 IoCs
  • UAC bypass 3 TTPs
  • Windows security bypass 2 TTPs
  • XpertRAT

    XpertRAT is a remote access trojan with various capabilities.

  • Adds policy Run key to start application 2 TTPs 2 IoCs
  • Executes dropped EXE 2 IoCs
  • 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
  • Program crash 2 IoCs
  • Suspicious use of SetThreadContext 9 IoCs
  • Drops file in Windows directory 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 10 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\Presupuesto proyecto P3787-SHN Barcelona.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\Presupuesto proyecto P3787-SHN Barcelona.pdf.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3536
    • C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe
      C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe C:\Users\Admin\AppData\Local\Temp\purggfce
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2520
      • C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe
        C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe C:\Users\Admin\AppData\Local\Temp\purggfce
        3⤵
        • Executes dropped EXE
        • 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:1508
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          C:\Users\Admin\AppData\Local\Temp\purggfce
          4⤵
            PID:4624
            • C:\Windows\SysWOW64\WerFault.exe
              C:\Windows\SysWOW64\WerFault.exe -u -p 4624 -s 84
              5⤵
              • Program crash
              PID:4280
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            C:\Users\Admin\AppData\Local\Temp\purggfce
            4⤵
            • 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:4300
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra0.txt"
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:3120
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra1.txt"
              5⤵
              • Accesses Microsoft Outlook accounts
              PID:1856
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra2.txt"
              5⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:2904
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra3.txt"
              5⤵
                PID:2572
              • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra4.txt"
                5⤵
                  PID:4652
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 4652 -s 84
                    6⤵
                    • Program crash
                    PID:3136
                • C:\Program Files (x86)\Internet Explorer\iexplore.exe
                  /stext "C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra4.txt"
                  5⤵
                    PID:4900
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4624 -ip 4624
            1⤵
            • Suspicious use of NtCreateProcessExOtherParentProcess
            • Suspicious use of WriteProcessMemory
            PID:3344
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
            1⤵
            • Drops file in Windows directory
            • Suspicious use of AdjustPrivilegeToken
            PID:4936
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4652 -ip 4652
            1⤵
            • Suspicious use of NtCreateProcessExOtherParentProcess
            PID:2132
          • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
            C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
            1⤵
            • Drops file in Windows directory
            • Suspicious use of AdjustPrivilegeToken
            PID:1348

          Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          • C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe

            MD5

            cda645ed8b9640ad687329797c61bc2b

            SHA1

            093bfbbac3edcd69d37d8f1796b5582eeee17c76

            SHA256

            fe770bd5f6db1cf2b358d92791d01964678248208cb5b67129c30cf7f49d2bfd

            SHA512

            1a9e68d3a9c5e16c8a8c54c34a60b16295981d4ed4747179ce7515cec111dd3199e24b21926f00c81040e897a19de1db801659d5bd0446b25759c1c6fbb6d807

          • C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe

            MD5

            cda645ed8b9640ad687329797c61bc2b

            SHA1

            093bfbbac3edcd69d37d8f1796b5582eeee17c76

            SHA256

            fe770bd5f6db1cf2b358d92791d01964678248208cb5b67129c30cf7f49d2bfd

            SHA512

            1a9e68d3a9c5e16c8a8c54c34a60b16295981d4ed4747179ce7515cec111dd3199e24b21926f00c81040e897a19de1db801659d5bd0446b25759c1c6fbb6d807

          • C:\Users\Admin\AppData\Local\Temp\onhaomfun.exe

            MD5

            cda645ed8b9640ad687329797c61bc2b

            SHA1

            093bfbbac3edcd69d37d8f1796b5582eeee17c76

            SHA256

            fe770bd5f6db1cf2b358d92791d01964678248208cb5b67129c30cf7f49d2bfd

            SHA512

            1a9e68d3a9c5e16c8a8c54c34a60b16295981d4ed4747179ce7515cec111dd3199e24b21926f00c81040e897a19de1db801659d5bd0446b25759c1c6fbb6d807

          • C:\Users\Admin\AppData\Local\Temp\purggfce

            MD5

            025d2961bef4117b728cd060de83efe1

            SHA1

            b4bda8aba55d0496c4f606c7d2f82da5ef8fbcf5

            SHA256

            62576de17b541547c04a522e47bbbee8019845c5e4d41aa11cfd62062fe6f7e8

            SHA512

            1ed29789250172561e2b8c8ecf5eeab731446f19411ba98769e7d4a8c8b7d255a7f5d1e2f00e07683e21e0f80c180d0d2aea86d5b49306f71157ff9e95e38136

          • C:\Users\Admin\AppData\Local\Temp\sqegl2jhtom26sn74z

            MD5

            e5deb375bb78e051e7195d66a069d5b5

            SHA1

            cd6c28770af1549abc6e0e34f7d26c9437138382

            SHA256

            a88f2fb94c4ffd8294a33497706bb607cbf607cf6c2c2a8ee6a27c2a03b40353

            SHA512

            0aab8592342e9b7c163777362d3193e71c293c4d829665f9347656bd16d6a5e481a55b83de537ab3f00a8c28c94b44187f5b70f17ce71fd98d16e4ba176b975c

          • C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra2.txt

            MD5

            f94dc819ca773f1e3cb27abbc9e7fa27

            SHA1

            9a7700efadc5ea09ab288544ef1e3cd876255086

            SHA256

            a3377ade83786c2bdff5db19ff4dbfd796da4312402b5e77c4c63e38cc6eff92

            SHA512

            72a2c10d7a53a7f9a319dab66d77ed65639e9aa885b551e0055fc7eaf6ef33bbf109205b42ae11555a0f292563914bc6edb63b310c6f9bda9564095f77ab9196

          • C:\Users\Admin\AppData\Roaming\U440R6D3-S1J8-T7X6-R224-O8V7P5X0L7L6\ymumkisra4.txt

            MD5

            f3b25701fe362ec84616a93a45ce9998

            SHA1

            d62636d8caec13f04e28442a0a6fa1afeb024bbb

            SHA256

            b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

            SHA512

            98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

          • memory/1508-134-0x0000000000400000-0x000000000042C000-memory.dmp

            Filesize

            176KB

          • memory/1508-138-0x0000000000400000-0x000000000042C000-memory.dmp

            Filesize

            176KB

          • memory/4936-139-0x0000022293F50000-0x0000022293F60000-memory.dmp

            Filesize

            64KB

          • memory/4936-140-0x0000022294620000-0x0000022294630000-memory.dmp

            Filesize

            64KB

          • memory/4936-141-0x0000022296CD0000-0x0000022296CD4000-memory.dmp

            Filesize

            16KB