Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240704-en
  • resource tags

    arch:x64arch:x86image:win11-20240704-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    06-07-2024 08:31

General

  • Target

    Particle.exe

  • Size

    5.5MB

  • MD5

    d41a6df7070f5d1231fd187c23ef90a2

  • SHA1

    67e18070c757390732c2a11484549104f44de4b8

  • SHA256

    163d8d2127a38630ef261ae21b46ecfdeb1198570a7317b9fccd7cf26da5248f

  • SHA512

    0b9879beee9a9b16e42d5a2a511352afefb013c20c483abba5022ba3dc36ebb500e4069d3e24ddad5e01b2cc7483bbe247d0f27d0403dfb657fdc7c7edacb2c7

  • SSDEEP

    49152:1iRhrIouNRGHaBEEnJ2DSyb6Fta4IlmfxNzR5c2wEnLjy5E7QaeUdBzHevxHeu0P:wXU3GHJJkfxlRanE0vd0l

Malware Config

Extracted

Family

xworm

Version

5.0

Mutex

RTEfkblgnvG3OK7t

Attributes
  • Install_directory

    %Public%

  • install_file

    ReAgentC.exe

  • pastebin_url

    https://pastebin.com/raw/UWpQULMP

  • telegram

    https://api.telegram.org/bot7420124943:AAF1r0gN9LdH2HJhpp3RjQMBU2cphBasfrs

aes.plain

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 5 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 3 IoCs
  • Scheduled Task/Job: Scheduled Task 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 14 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\Particle.exe
    "C:\Users\Admin\AppData\Local\Temp\Particle.exe"
    1⤵
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:3448
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      powershell -Command "Add-MpPreference -ExclusionPath \"C:\\\""
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3576
    • C:\Users\Admin\AppData\Local\Temp\temporary3904832452\temp.bin
      C:\Users\Admin\AppData\Local\Temp\temporary3904832452\temp.bin
      2⤵
      • Executes dropped EXE
      • 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:1196
      • 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\temporary3904832452\temp.bin'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3356
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'temp.bin'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4272
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\ReAgentC.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4808
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'ReAgentC.exe'
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4912
      • C:\Windows\System32\schtasks.exe
        "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "ReAgentC" /tr "C:\Users\Public\ReAgentC.exe"
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1524
  • C:\Users\Public\ReAgentC.exe
    C:\Users\Public\ReAgentC.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:4240
  • C:\Users\Public\ReAgentC.exe
    C:\Users\Public\ReAgentC.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:5044

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    654B

    MD5

    2cbbb74b7da1f720b48ed31085cbd5b8

    SHA1

    79caa9a3ea8abe1b9c4326c3633da64a5f724964

    SHA256

    e31b18f21621d9983bfdf1ea3e53884a9d58b8ffd79e0e5790da6f3a81a8b9d3

    SHA512

    ecf02d5240e0c1c005d3ab393aa7eff62bd498c2db5905157e2bf6d29e1b663228a9583950842629d1a4caef404c8941a0c7799b1a3bd1eb890a09fdb7efcff9

  • 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

    1a9fa92a4f2e2ec9e244d43a6a4f8fb9

    SHA1

    9910190edfaccece1dfcc1d92e357772f5dae8f7

    SHA256

    0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888

    SHA512

    5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64

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

    Filesize

    944B

    MD5

    5b705b4839f481b2485f2195c589cad0

    SHA1

    a55866cd9e6fedf352d0e937101755ea61a50c86

    SHA256

    f6a3b94a63de605bbbcf1e95cb2d743166f44ea7e9d0d2bfa0e88c94c26e37c6

    SHA512

    f228eccd5646068a81e79baeaf7e8bfa470b30d503bf0ca8cc746c009510ab609b5c091cadf08fab1e3581900cdb7834c775c61a95a29c2d73ccd0dcbd851bab

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

    Filesize

    944B

    MD5

    9030854a24cf37b7b4e3650aac67d427

    SHA1

    27f3e35705bbe6388da04bf97e09da1875a6bc71

    SHA256

    e818d49edbec3553b77c8a400c04fc88b601614946c281fc9c86acf9498010e0

    SHA512

    f402098f60d99d7e7130095c6965bb540454ff9867e72a9c2efaf833967639b802f193f9e73af53829167b43a2d9100e19f9056621f75543fa2aadad1e185dfd

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

    Filesize

    944B

    MD5

    052b734e3d0b49bccde40def527c10df

    SHA1

    2ac7c9bd7dc7bd54699fd06252a89a963e1c1ec0

    SHA256

    d51b94b595a5bee567d89011dc8d97f6210a7911828e5a24172708d5a177f65f

    SHA512

    bbe94350f51a4029f44631e5bb6658d9583d46011db3ca3159a21b179ab7dc7b200a27ccdf34897fdcba890acec2cdb84a2c1ba0cd95360478e38e911f56f4ba

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jmx5zxi4.rmn.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

  • C:\Users\Admin\AppData\Local\Temp\temporary3904832452\temp.bin

    Filesize

    47KB

    MD5

    61e4e411b1741e127e210b35c092ff14

    SHA1

    bec89b4735b471a3db9b9a687c9e6c2bc8c61809

    SHA256

    824f647a43f25a617838cfa1e33c03fe89cf479a01ad541e79fb05e21b8618cc

    SHA512

    0eb736b18faf0919ce217819c8fc52dd9e424a53e3833af60d045be1b82e9f68aef7b29634dbf6b8a96d09f09a30c1253879507b809fa8a9de1a96bbd3daf6d9

  • memory/1196-22-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/1196-21-0x0000000000100000-0x0000000000112000-memory.dmp

    Filesize

    72KB

  • memory/1196-65-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/1196-66-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/1196-67-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/1196-68-0x000000001AE30000-0x000000001AE3C000-memory.dmp

    Filesize

    48KB

  • memory/3576-0-0x00007FFC9B473000-0x00007FFC9B475000-memory.dmp

    Filesize

    8KB

  • memory/3576-16-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/3576-13-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/3576-12-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/3576-11-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/3576-10-0x00007FFC9B470000-0x00007FFC9BF32000-memory.dmp

    Filesize

    10.8MB

  • memory/3576-9-0x00000144D8040000-0x00000144D8062000-memory.dmp

    Filesize

    136KB