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Overview

overview

10

Static

static

10

XClient.exe

windows11-21h2-x64

Analysis

  • max time kernel
    376s
  • max time network
    377s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    02/05/2024, 19:37

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Errors

Reason
Machine shutdown
Report Analysis Logs

General

  • Target

    XClient.exe

  • Size

    305KB

  • MD5

    aa86049b23de9ca25639df01e72ce4c3

  • SHA1

    fe1e95c2983c448187dc401150621ff43a40b6f0

  • SHA256

    4fea20fe413398e2d8db3ff8ad61c02cfeae0df6044b39fb01d3c56f45df2994

  • SHA512

    2786ae00580698a79ff885f30fa2a87fee3e03d180fd1b42e7f4a3b4433e19451b614f2fd632b06ecebbfa577215e38bfd2276575d4ffddbbeeee8eb1b1ce732

  • SSDEEP

    6144:BhYI9d+GIIIIIIIhIIIIIIIIIIIIIIIU:a

Score
10/10
xwormpersistencerattrojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

127.0.0.1:18657

5.tcp.eu.ngrok.io:18657
Mutex

abH6MtVFLvlMhC1I

Attributes
  • Install_directory

    %AppData%

  • install_file

    HumanFallFlat.exe

aes.plain

Signatures

  • Contains code to disable Windows Defender 1 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • Drops startup file 2 IoCs
  • Executes dropped EXE 6 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Legitimate hosting services abused for malware hosting/C2 1 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.

    persistence
  • Modifies data under HKEY_USERS 15 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 4 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2140
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "HumanFallFlat" /tr "C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe"
      2⤵
      • Creates scheduled task(s)
      PID:3340
    • C:\Windows\SYSTEM32\shutdown.exe
      shutdown.exe /f /s /t 0
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2036
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\MiniSearchHost.exe" -ServerName:MiniSearchUI.AppXj3y73at8fy1htwztzxs68sxx1v7cksp7.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:5052
  • C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1240
  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2648
  • C:\Users\Admin\AppData\Local\Temp\XClient.exe
    "C:\Users\Admin\AppData\Local\Temp\XClient.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1544
  • C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4020
  • C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3856
  • C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2440
  • C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3620
  • C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2020
  • C:\Windows\system32\LogonUI.exe
    "LogonUI.exe" /flags:0x4 /state0:0xa3a25855 /state1:0x41c64e6d
    1⤵
    • Modifies data under HKEY_USERS
    • Suspicious use of SetWindowsHookEx
    PID:2228

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    654B

    MD5

    2cbbb74b7da1f720b48ed31085cbd5b8

    SHA1

    79caa9a3ea8abe1b9c4326c3633da64a5f724964

    SHA256

    e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

    SHA512

    ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

    Download Submit

  • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat
    Filesize

    10KB

    MD5

    18951ad4190ed728ba23e932e0c6e0db

    SHA1

    fa2d16fcbc3defd07cb8f21d8ea4793a21f261f0

    SHA256

    66607b009c345a8e70fc1e58ab8a13bbea0e370c8d75f16d2cce5b876a748915

    SHA512

    a67237089efa8615747bdc6cfe0afc977dc54cfd624a8d2e5124a441c204f1ec58ee7cfbbc105ddc2c18d4f254b9e124d71630bcdba0253d41a96890104f2fff

    Download Submit

  • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\TempState\SearchHoverUnifiedTileModelCache.dat
    Filesize

    10KB

    MD5

    ee87a5df2cec41353233851e9956d539

    SHA1

    cdd287b4be58f5ee3464c31c9f073daad13f2eb7

    SHA256

    2c25ce8141d1e6e601907a4d54f367ba7f6032c9596d24b30a245d94b719c880

    SHA512

    3afe8451239bbfa4c7cd6ad4e123d8558aba43a570998ef76834dd12b8b0266a4c9dc7bf57dd9a903208a029f3a0ae54822f1ba1d29414615bdcea963b062379

    Download Submit

  • C:\Users\Admin\AppData\Roaming\HumanFallFlat.exe
    Filesize

    305KB

    MD5

    aa86049b23de9ca25639df01e72ce4c3

    SHA1

    fe1e95c2983c448187dc401150621ff43a40b6f0

    SHA256

    4fea20fe413398e2d8db3ff8ad61c02cfeae0df6044b39fb01d3c56f45df2994

    SHA512

    2786ae00580698a79ff885f30fa2a87fee3e03d180fd1b42e7f4a3b4433e19451b614f2fd632b06ecebbfa577215e38bfd2276575d4ffddbbeeee8eb1b1ce732

    Download Submit

  • memory/2140-11-0x00007FF94CB73000-0x00007FF94CB75000-memory.dmp

    Filesize

    8KB

    Download

  • memory/2140-18-0x00007FF94CB70000-0x00007FF94D632000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/2140-2-0x00007FF94CB70000-0x00007FF94D632000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/2140-29-0x00000000009C0000-0x00000000009CC000-memory.dmp

    Filesize

    48KB

    Download

  • memory/2140-0-0x0000000000270000-0x00000000002C2000-memory.dmp

    Filesize

    328KB

    Download

  • memory/2140-1-0x00007FF94CB73000-0x00007FF94CB75000-memory.dmp

    Filesize

    8KB

    Download

  • memory/2140-50-0x0000000000A60000-0x0000000000A6C000-memory.dmp

    Filesize

    48KB

    Download

  • memory/2140-64-0x00000000026F0000-0x00000000026FA000-memory.dmp

    Filesize

    40KB

    Download

  • memory/2140-66-0x000000001BB30000-0x000000001BB3E000-memory.dmp

    Filesize

    56KB

    Download

  • memory/2140-67-0x000000001BB40000-0x000000001BB4A000-memory.dmp

    Filesize

    40KB

    Download

  • memory/2140-68-0x00007FF94CB70000-0x00007FF94D632000-memory.dmp

    Filesize

    10.8MB

    Download