Analysis

  • max time kernel
    146s
  • max time network
    154s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    22-09-2021 06:24

General

  • Target

    49af0abba03a7d559171f378728e9bc7.exe

  • Size

    33KB

  • MD5

    49af0abba03a7d559171f378728e9bc7

  • SHA1

    7e6e1ccf693bb62f2a36119996583228a9e5c665

  • SHA256

    bc2a5e452669de43c4f4533c995b515bace2941ea5b45bb537085b204ee5d54b

  • SHA512

    d155349a6dae76775b26a96ec00a8dc860749eb46450c6dcc479303afa01325b1fb31b41c8adac3cbabb2b17c7b23a6768949a8bf5221c3edee0a25082e71a8f

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 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.

  • 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
  • Suspicious use of SetThreadContext 7 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 16 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 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\49af0abba03a7d559171f378728e9bc7.exe
    "C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2160
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Start-Sleep -Seconds 3
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2728
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Start-Sleep -s 15
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3876
    • C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.exe
      C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.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:1280
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        C:\Users\Admin\AppData\Local\Temp\49af0abba03a7d559171f378728e9bc7.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:1732
        • C:\Windows\SysWOW64\notepad.exe
          notepad.exe
          4⤵
          • Deletes itself
          PID:1624
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\iwbmparlt0.txt"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2440
        • C:\Program Files (x86)\Internet Explorer\iexplore.exe
          /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\iwbmparlt1.txt"
          4⤵
            PID:3020
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\iwbmparlt2.txt"
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:4068
          • C:\Program Files (x86)\Internet Explorer\iexplore.exe
            /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\iwbmparlt3.txt"
            4⤵
              PID:2800
            • C:\Program Files (x86)\Internet Explorer\iexplore.exe
              /stext "C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\iwbmparlt4.txt"
              4⤵
                PID:1328

        Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

          MD5

          b42b8394f52b01b93879625688c3d79d

          SHA1

          3ed5877ab13e7655482c19e8b7511f8b2bfcdbb3

          SHA256

          b7b0a0ab5e777b74a8d7ec285804091eb3a4c71fcc2c57cddfa8541d05409cdd

          SHA512

          86357e54c29ee9c107b5655d457121f35117565fae4fdd018e56079eb7ca012e4afe0a5d5562bc2996b932b02450ad0fbb7f27047315b524138a0fe08c4f79c2

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          MD5

          3c6350435d9f08dd79c818f57671e433

          SHA1

          39254c301b6de8f26bbd825260e059b15d110e18

          SHA256

          eb08a56db9618126a62da285f8ea5b4b3499f0a4ff78e1d2f7245a4bdea4aa56

          SHA512

          65bfe5dbd01aadd5fa95568cc2380816a587eca27cc4da8a755616e82018c861809a16573560ad022f3001dbf4051e363f5c3011a5f3e207b1329e35dba4d6b1

        • C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\iwbmparlt2.txt

          MD5

          f94dc819ca773f1e3cb27abbc9e7fa27

          SHA1

          9a7700efadc5ea09ab288544ef1e3cd876255086

          SHA256

          a3377ade83786c2bdff5db19ff4dbfd796da4312402b5e77c4c63e38cc6eff92

          SHA512

          72a2c10d7a53a7f9a319dab66d77ed65639e9aa885b551e0055fc7eaf6ef33bbf109205b42ae11555a0f292563914bc6edb63b310c6f9bda9564095f77ab9196

        • C:\Users\Admin\AppData\Roaming\L3Q7J4T2-J8A6-L6O4-W4G3-U5J7D0W2W5F0\iwbmparlt4.txt

          MD5

          f3b25701fe362ec84616a93a45ce9998

          SHA1

          d62636d8caec13f04e28442a0a6fa1afeb024bbb

          SHA256

          b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

          SHA512

          98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

        • memory/1280-168-0x0000000000400000-0x000000000042C000-memory.dmp

          Filesize

          176KB

        • memory/1280-169-0x00000000004010B8-mapping.dmp

        • memory/1280-179-0x0000000000400000-0x000000000042C000-memory.dmp

          Filesize

          176KB

        • memory/1328-201-0x000000000040C2A8-mapping.dmp

        • memory/1328-200-0x0000000000400000-0x0000000000415000-memory.dmp

          Filesize

          84KB

        • memory/1624-182-0x0000000000000000-mapping.dmp

        • memory/1732-172-0x0000000000400000-0x0000000000443000-memory.dmp

          Filesize

          268KB

        • memory/1732-177-0x0000000002F01000-0x0000000002FFD000-memory.dmp

          Filesize

          1008KB

        • memory/1732-176-0x0000000002F00000-0x0000000003053000-memory.dmp

          Filesize

          1.3MB

        • memory/1732-173-0x0000000000401364-mapping.dmp

        • memory/2160-115-0x0000000000BD0000-0x0000000000BD1000-memory.dmp

          Filesize

          4KB

        • memory/2160-121-0x00000000054B0000-0x00000000059AE000-memory.dmp

          Filesize

          5.0MB

        • memory/2160-119-0x00000000054B0000-0x00000000054B1000-memory.dmp

          Filesize

          4KB

        • memory/2160-118-0x0000000005400000-0x0000000005401000-memory.dmp

          Filesize

          4KB

        • memory/2160-167-0x0000000007800000-0x0000000007830000-memory.dmp

          Filesize

          192KB

        • memory/2160-166-0x0000000008630000-0x000000000867F000-memory.dmp

          Filesize

          316KB

        • memory/2160-117-0x00000000059B0000-0x00000000059B1000-memory.dmp

          Filesize

          4KB

        • memory/2440-183-0x0000000000400000-0x0000000000426000-memory.dmp

          Filesize

          152KB

        • memory/2440-184-0x0000000000423BC0-mapping.dmp

        • memory/2728-139-0x0000000009F50000-0x0000000009F51000-memory.dmp

          Filesize

          4KB

        • memory/2728-127-0x0000000004E52000-0x0000000004E53000-memory.dmp

          Filesize

          4KB

        • memory/2728-131-0x0000000008370000-0x0000000008371000-memory.dmp

          Filesize

          4KB

        • memory/2728-140-0x0000000009670000-0x0000000009671000-memory.dmp

          Filesize

          4KB

        • memory/2728-126-0x0000000004E50000-0x0000000004E51000-memory.dmp

          Filesize

          4KB

        • memory/2728-134-0x0000000008940000-0x0000000008941000-memory.dmp

          Filesize

          4KB

        • memory/2728-133-0x0000000008BB0000-0x0000000008BB1000-memory.dmp

          Filesize

          4KB

        • memory/2728-132-0x00000000080F0000-0x00000000080F1000-memory.dmp

          Filesize

          4KB

        • memory/2728-125-0x0000000007840000-0x0000000007841000-memory.dmp

          Filesize

          4KB

        • memory/2728-130-0x0000000008060000-0x0000000008061000-memory.dmp

          Filesize

          4KB

        • memory/2728-151-0x0000000004E53000-0x0000000004E54000-memory.dmp

          Filesize

          4KB

        • memory/2728-129-0x0000000007F80000-0x0000000007F81000-memory.dmp

          Filesize

          4KB

        • memory/2728-128-0x0000000007EE0000-0x0000000007EE1000-memory.dmp

          Filesize

          4KB

        • memory/2728-124-0x00000000071D0000-0x00000000071D1000-memory.dmp

          Filesize

          4KB

        • memory/2728-120-0x0000000000000000-mapping.dmp

        • memory/2800-197-0x0000000000413750-mapping.dmp

        • memory/2800-196-0x0000000000400000-0x0000000000416000-memory.dmp

          Filesize

          88KB

        • memory/3020-187-0x0000000000400000-0x000000000041B000-memory.dmp

          Filesize

          108KB

        • memory/3020-188-0x0000000000411654-mapping.dmp

        • memory/3876-178-0x0000000006623000-0x0000000006624000-memory.dmp

          Filesize

          4KB

        • memory/3876-142-0x0000000000000000-mapping.dmp

        • memory/3876-152-0x0000000006620000-0x0000000006621000-memory.dmp

          Filesize

          4KB

        • memory/3876-154-0x0000000006622000-0x0000000006623000-memory.dmp

          Filesize

          4KB

        • memory/4068-192-0x0000000000442F04-mapping.dmp

        • memory/4068-191-0x0000000000400000-0x0000000000459000-memory.dmp

          Filesize

          356KB