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Overview

overview

10

Static

static

10

NursultanLoader.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    148s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/05/2024, 17:38

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General

  • Target

    NursultanLoader.exe

  • Size

    337KB

  • MD5

    824b28b6af4316c96e9a181e341fe6ad

  • SHA1

    49ad85fa5ca6dffa4dec4871bd0cd44abc8c0b5d

  • SHA256

    6005eaef1b00bdfeef8c87db8ff80bce2f23f3c8b392dfbec9f5a4f27b0c7ec9

  • SHA512

    1b3ff6f2a90157e45f4a9404a76de8d460b7705d1c34999e4b87d89d0d00961618e8a69c77f21edf1a9bc253cc432ba8a01377535484fc739370bf3314a5d2cc

  • SSDEEP

    6144:GfcWgBhbib+GIIIIIIIhIIIIIIIIIIIIIIIU:scWH8

Score
10/10
xwormexecutionpersistencerattrojan

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:7000

123.0.0.1:7000
Attributes
  • Install_directory

    %AppData%

  • install_file

    Steam.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

    trojanratxworm
  • Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    execution
  • 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 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • 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).

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 13 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe
    "C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4864
    • 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\NursultanLoader.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3552
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'NursultanLoader.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:32
    • 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\Steam.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1392
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Steam.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4732
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Steam" /tr "C:\Users\Admin\AppData\Roaming\Steam.exe"
      2⤵
      • Creates scheduled task(s)
      PID:2952
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:3616
  • C:\Users\Admin\AppData\Roaming\Steam.exe
    C:\Users\Admin\AppData\Roaming\Steam.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:3672
  • C:\Users\Admin\AppData\Roaming\Steam.exe
    C:\Users\Admin\AppData\Roaming\Steam.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:1160

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    654B

    MD5

    2ff39f6c7249774be85fd60a8f9a245e

    SHA1

    684ff36b31aedc1e587c8496c02722c6698c1c4e

    SHA256

    e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

    SHA512

    1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

    Download Submit

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

    2KB

    MD5

    d85ba6ff808d9e5444a4b369f5bc2730

    SHA1

    31aa9d96590fff6981b315e0b391b575e4c0804a

    SHA256

    84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

    SHA512

    8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

    Download Submit

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

    944B

    MD5

    cadef9abd087803c630df65264a6c81c

    SHA1

    babbf3636c347c8727c35f3eef2ee643dbcc4bd2

    SHA256

    cce65b73cdfe9304bcd5207913e8b60fb69faa20cd3b684f2b0343b755b99438

    SHA512

    7278aa87124abb382d9024a645e881e7b7cf1b84e8894943b36e018dbf0399e6858392f77980b599fa5488e2e21bf757a0702fe6419417edac93b68e0c2ec085

    Download Submit

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

    944B

    MD5

    15dde0683cd1ca19785d7262f554ba93

    SHA1

    d039c577e438546d10ac64837b05da480d06bf69

    SHA256

    d6fa39eab7ee36f44dc3f9f2839d098433db95c1eba924e4bcf4e5c0d268d961

    SHA512

    57c0e1b87bc1c136f0d39f3ce64bb8f8274a0491e4ca6e45e5c7f9070aa9d9370c6f590ce37cd600b252df2638d870205249a514c43245ca7ed49017024a4672

    Download Submit

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

    944B

    MD5

    2d06ce10e4e5b9e174b5ebbdad300fad

    SHA1

    bcc1c231e22238cef02ae25331320060ada2f131

    SHA256

    87d1dd56f12a88907ba5aebca8d555443d6f77ed214497277cc8bcd31c669f2c

    SHA512

    38cfbeb59605854ae4fcfae8619a6b26bd916148acfb5636383672a3960b45ca41fed5c241f97465129e92eaf78c4c85dcf258f1ab501a2bf771287ce04f76a7

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_opdguizt.zf2.ps1
    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    Download Submit

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Steam.lnk
    Filesize

    759B

    MD5

    62de770d4730775fd813946a92fe98ed

    SHA1

    fbc4d093291553d20490324c3ede40df0079d04f

    SHA256

    a6d567bc601946b393f9574ecc6e2a339fefa156ff753decce74a6e5337d31fd

    SHA512

    dbe4831915865d94603b62e87d9c32e9f92a52628ebd76ce0201cf785c3cfd1d29bd714c3d0d06ef5c2c58ca92be127aec01af7fe4b30e1efce2d00de4a83dc7

    Download Submit

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

    337KB

    MD5

    824b28b6af4316c96e9a181e341fe6ad

    SHA1

    49ad85fa5ca6dffa4dec4871bd0cd44abc8c0b5d

    SHA256

    6005eaef1b00bdfeef8c87db8ff80bce2f23f3c8b392dfbec9f5a4f27b0c7ec9

    SHA512

    1b3ff6f2a90157e45f4a9404a76de8d460b7705d1c34999e4b87d89d0d00961618e8a69c77f21edf1a9bc253cc432ba8a01377535484fc739370bf3314a5d2cc

    Download Submit

  • memory/3552-3-0x00007FFFE9CF0000-0x00007FFFEA7B1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3552-18-0x00007FFFE9CF0000-0x00007FFFEA7B1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3552-15-0x0000016A5B2F0000-0x0000016A5B312000-memory.dmp

    Filesize

    136KB

    Download

  • memory/3552-14-0x00007FFFE9CF0000-0x00007FFFEA7B1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3552-4-0x00007FFFE9CF0000-0x00007FFFEA7B1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3616-59-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-65-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-58-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-69-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-68-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-67-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-66-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-57-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-64-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/3616-63-0x000001A6F9E30000-0x000001A6F9E31000-memory.dmp

    Filesize

    4KB

    Download

  • memory/4864-0-0x00007FFFE9CF3000-0x00007FFFE9CF5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/4864-2-0x00007FFFE9CF0000-0x00007FFFEA7B1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4864-72-0x00007FFFE9CF3000-0x00007FFFE9CF5000-memory.dmp

    Filesize

    8KB

    Download

  • memory/4864-73-0x00007FFFE9CF0000-0x00007FFFEA7B1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/4864-1-0x0000000000DE0000-0x0000000000E3A000-memory.dmp

    Filesize

    360KB

    Download