Analysis

  • max time kernel
    298s
  • max time network
    306s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-03-2024 19:36

General

  • Target

    XClient.exe

  • Size

    86KB

  • MD5

    b02c9848a5f2039383868c3e100783dd

  • SHA1

    e7d02d1bb49590d54fa2d37345e86ae7a1b6d2cc

  • SHA256

    34aa9bad44607ef50b9327ae1775d6048f8954b2f834ba096a2a85b9a0c0222d

  • SHA512

    7cd95379c2b1b9155cbff3872aa318bcf0bb5edfa5dc3457600c6e52c48e78097a82c66bdadfc3db0f560d2a1c850454e96dee3325b59cde5ebb2abd997d7b76

  • SSDEEP

    1536:tJqyxozIQOT5HjMlBkJqa8s94Utb/GHZe3xRTyPGbRK1wyN6OGOeLj6fZl:DqAQOT5DMoJFb+UxRTldxOkmf7

Malware Config

Extracted

Family

xworm

C2

Thecoolboi991-51392.portmap.io:51392

Attributes
  • Install_directory

    %AppData%

  • install_file

    XClient.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 4 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 9 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4020
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:688
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1508
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\XClient.exe'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5096
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
      2⤵
        PID:1268
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
        2⤵
        • Creates scheduled task(s)
        PID:4500
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4268
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3784
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3884
    • C:\Users\Admin\AppData\Roaming\XClient.exe
      C:\Users\Admin\AppData\Roaming\XClient.exe
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3156

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

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

      Filesize

      654B

      MD5

      2ff39f6c7249774be85fd60a8f9a245e

      SHA1

      684ff36b31aedc1e587c8496c02722c6698c1c4e

      SHA256

      e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

      SHA512

      1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

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

      Filesize

      2KB

      MD5

      d85ba6ff808d9e5444a4b369f5bc2730

      SHA1

      31aa9d96590fff6981b315e0b391b575e4c0804a

      SHA256

      84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

      SHA512

      8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

      Filesize

      944B

      MD5

      cadef9abd087803c630df65264a6c81c

      SHA1

      babbf3636c347c8727c35f3eef2ee643dbcc4bd2

      SHA256

      cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

      SHA512

      7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

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

      Filesize

      944B

      MD5

      0aa63dbb46d451e47a7a682c64af776d

      SHA1

      3b0026f2dae8e9c491ccaa40133755779de35aaa

      SHA256

      9158038718d41172c22a3c1a15852405e3e1c8e2c44fa066328eb1520e5d977b

      SHA512

      4d2564850c2ab1bc71089412f19147df4a1cd3075aa2039aa894271b333cd9c510b7ba4d70889f24d45d8b366d8b5167abdcf24314e4753420337c7d34e7c43f

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1dcaemci.0hr.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Roaming\XClient.exe

      Filesize

      86KB

      MD5

      b02c9848a5f2039383868c3e100783dd

      SHA1

      e7d02d1bb49590d54fa2d37345e86ae7a1b6d2cc

      SHA256

      34aa9bad44607ef50b9327ae1775d6048f8954b2f834ba096a2a85b9a0c0222d

      SHA512

      7cd95379c2b1b9155cbff3872aa318bcf0bb5edfa5dc3457600c6e52c48e78097a82c66bdadfc3db0f560d2a1c850454e96dee3325b59cde5ebb2abd997d7b76

    • memory/688-3-0x000001E81B630000-0x000001E81B652000-memory.dmp

      Filesize

      136KB

    • memory/688-4-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/688-5-0x000001E802730000-0x000001E802740000-memory.dmp

      Filesize

      64KB

    • memory/688-6-0x000001E802730000-0x000001E802740000-memory.dmp

      Filesize

      64KB

    • memory/688-16-0x000001E802730000-0x000001E802740000-memory.dmp

      Filesize

      64KB

    • memory/688-19-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/1508-38-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/1508-22-0x00000270DE460000-0x00000270DE470000-memory.dmp

      Filesize

      64KB

    • memory/1508-35-0x00000270DE460000-0x00000270DE470000-memory.dmp

      Filesize

      64KB

    • memory/1508-36-0x00000270DE460000-0x00000270DE470000-memory.dmp

      Filesize

      64KB

    • memory/1508-23-0x00000270DE460000-0x00000270DE470000-memory.dmp

      Filesize

      64KB

    • memory/1508-21-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/3156-75-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/3156-74-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/3784-68-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/3784-69-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/3884-72-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/3884-71-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/4020-0-0x0000000000970000-0x000000000098C000-memory.dmp

      Filesize

      112KB

    • memory/4020-2-0x000000001B620000-0x000000001B630000-memory.dmp

      Filesize

      64KB

    • memory/4020-1-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/4020-51-0x000000001B620000-0x000000001B630000-memory.dmp

      Filesize

      64KB

    • memory/4020-34-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/4268-63-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/4268-65-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/5096-55-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB

    • memory/5096-53-0x00000139C1820000-0x00000139C1830000-memory.dmp

      Filesize

      64KB

    • memory/5096-50-0x00000139C1820000-0x00000139C1830000-memory.dmp

      Filesize

      64KB

    • memory/5096-49-0x00000139C1820000-0x00000139C1830000-memory.dmp

      Filesize

      64KB

    • memory/5096-44-0x00007FFCA9E00000-0x00007FFCAA8C1000-memory.dmp

      Filesize

      10.8MB