Analysis

  • max time kernel
    91s
  • max time network
    94s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    31-05-2024 14:05

General

  • Target

    NursultanLoader.exe

  • Size

    63KB

  • MD5

    3adee1c8284ffa4c948bd53cb4ed8b9e

  • SHA1

    15488f0a91896a322ffdc829d9fe2bcb3cfeb319

  • SHA256

    61a1e82d71d8b95443c04c37b486b3b56dc9c2931eb10aceb77df00f863be28c

  • SHA512

    d9fbe3637219b9b5c53555dbeab64e1c1288acaa4eba727e3e133abf03967b5ea059ae41107ba9960ddd3d629cfca795239baee66b52166ed391d5c81a23924b

  • SSDEEP

    1536:N1loX++ZE4J/A/oPXh06NNi+bDvMm4oM6XsVO8Ltxxa:yO+H/BPXh00Q+bDvMHo5sVO8Ls

Malware Config

Extracted

Family

xworm

C2

loss-winners.gl.at.ply.gg:1567

Attributes
  • Install_directory

    %AppData%

  • install_file

    Expensive 3.1.exe

Signatures

  • Detect Xworm Payload 1 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe
    "C:\Users\Admin\AppData\Local\Temp\NursultanLoader.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4872
    • 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:2548
    • 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:4476
    • 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\Expensive 3.1.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4800
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Expensive 3.1.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4676

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    2KB

    MD5

    627073ee3ca9676911bee35548eff2b8

    SHA1

    4c4b68c65e2cab9864b51167d710aa29ebdcff2e

    SHA256

    85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c

    SHA512

    3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb

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

    Filesize

    944B

    MD5

    05b3cd21c1ec02f04caba773186ee8d0

    SHA1

    39e790bfe10abf55b74dfb3603df8fcf6b5e6edb

    SHA256

    911efc5cf9cbeb697543eb3242f5297e1be46dd6603a390140a9ff031ed9e1e8

    SHA512

    e751008b032394817beb46937fd93a73be97254c2be94dd42f22fb1306d2715c653ece16fa96eab1a3e73811936768cea6b37888437086fc6f3e3e793a2515eb

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

    Filesize

    944B

    MD5

    050567a067ffea4eb40fe2eefebdc1ee

    SHA1

    6e1fb2c7a7976e0724c532449e97722787a00fec

    SHA256

    3952d5b543e5cb0cb84014f4ad9f5f1b7166f592d28640cbc3d914d0e6f41d2e

    SHA512

    341ad71ef7e850b10e229666312e4bca87a0ed9fe25ba4b0ab65661d5a0efa855db0592153106da07134d8fc2c6c0e44709bf38183c9a574a1fa543189971259

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

    Filesize

    944B

    MD5

    781da0576417bf414dc558e5a315e2be

    SHA1

    215451c1e370be595f1c389f587efeaa93108b4c

    SHA256

    41a5aef8b0bbeea2766f40a7bba2c78322379f167c610f7055ccb69e7db030fe

    SHA512

    24e283aa30a2903ebe154dad49b26067a45e46fec57549ad080d3b9ec3f272044efaaed3822d067837f5521262192f466c47195ffe7f75f8c7c5dcf3159ea737

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ezwdu4hy.wa4.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • memory/2548-7-0x00000216C8500000-0x00000216C8522000-memory.dmp

    Filesize

    136KB

  • memory/2548-15-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

    Filesize

    10.8MB

  • memory/2548-16-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

    Filesize

    10.8MB

  • memory/2548-12-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

    Filesize

    10.8MB

  • memory/2548-11-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

    Filesize

    10.8MB

  • memory/4872-0-0x00007FFF30E23000-0x00007FFF30E25000-memory.dmp

    Filesize

    8KB

  • memory/4872-1-0x0000000000190000-0x00000000001A6000-memory.dmp

    Filesize

    88KB

  • memory/4872-49-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

    Filesize

    10.8MB

  • memory/4872-50-0x00007FFF30E23000-0x00007FFF30E25000-memory.dmp

    Filesize

    8KB

  • memory/4872-51-0x00007FFF30E20000-0x00007FFF318E2000-memory.dmp

    Filesize

    10.8MB