Analysis

  • max time kernel
    76s
  • max time network
    78s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-01-2025 01:48

General

  • Target

    SolaraSetup.exe

  • Size

    138KB

  • MD5

    de82040516bdddfa1ae7cd25ff1d8821

  • SHA1

    510e369380576be42c34602f011ebe1ca7857d96

  • SHA256

    996b01d648030939599a70593631cca8ef57ee681e0bac831282bff157a52e9f

  • SHA512

    a6bcca6ddc6d312c339537f2593eeb2ded6a4444e648a58d61d7c24724bc2ec097054fdb4101c306d1af191832755b9f2bbbc01df24da74a5a12042d9f6c5e86

  • SSDEEP

    3072:bhVm3OgDkb4inC11jOLJMle68EiJHuFOve:tVBgDkbnC1pe682O

Malware Config

Extracted

Family

xworm

C2

127.0.0.1:24468

friendly-nest.gl.at.ply.gg:24468

Attributes
  • Install_directory

    %Temp%

  • install_file

    Windows Session Start-Up.exe

Signatures

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Xworm family
  • 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.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 48 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • 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).

  • Modifies data under HKEY_USERS 64 IoCs
  • Modifies registry class 4 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: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 16 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\SolaraSetup.exe
    "C:\Users\Admin\AppData\Local\Temp\SolaraSetup.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1948
    • 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\SolaraSetup.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3384
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'SolaraSetup.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3224
    • 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\Windows Session Start-Up.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2516
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Session Start-Up.exe'
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:564
    • C:\Windows\System32\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Session Start-Up" /tr "C:\Users\Admin\AppData\Local\Temp\Windows Session Start-Up.exe"
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4940
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:5000
    • C:\Users\Admin\AppData\Local\Temp\Windows Session Start-Up.exe
      "C:\Users\Admin\AppData\Local\Temp\Windows Session Start-Up.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:4460
    • C:\Windows\system32\BackgroundTransferHost.exe
      "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.13
      1⤵
      • Modifies registry class
      PID:828
    • C:\Windows\system32\SearchIndexer.exe
      C:\Windows\system32\SearchIndexer.exe /Embedding
      1⤵
      • Enumerates connected drives
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1700
      • C:\Windows\System32\SearchProtocolHost.exe
        "C:\Windows\System32\SearchProtocolHost.exe" Global\UsGthrFltPipeMssGthrPipe1_ Global\UsGthrCtrlFltPipeMssGthrPipe1 1 -2147483646 "Software\Microsoft\Windows Search" "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT; MS Search 4.0 Robot)" "C:\ProgramData\Microsoft\Search\Data\Temp\usgthrsvc" "DownLevelDaemon"
        2⤵
        • Modifies data under HKEY_USERS
        PID:4540
      • C:\Windows\system32\SearchFilterHost.exe
        "C:\Windows\system32\SearchFilterHost.exe" 828 2716 2728 812 {0E5DCEC5-7795-4E38-9621-94DFD9F9A421}
        2⤵
        • Modifies data under HKEY_USERS
        PID:4620
      • C:\Windows\system32\SearchFilterHost.exe
        "C:\Windows\system32\SearchFilterHost.exe" 828 2740 2732 812 {85EE815A-7738-4808-A14A-3AD87E32A3BF}
        2⤵
        • Modifies data under HKEY_USERS
        PID:2884
    • C:\Users\Admin\AppData\Local\Temp\Windows Session Start-Up.exe
      "C:\Users\Admin\AppData\Local\Temp\Windows Session Start-Up.exe"
      1⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3012

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Windows Session Start-Up.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

      e07eea85a8893f23fb814cf4b3ed974c

      SHA1

      8a8125b2890bbddbfc3531d0ee4393dbbf5936fe

      SHA256

      83387ce468d717a7b4ba238af2273da873b731a13cc35604f775a31fa0ac70ea

      SHA512

      9d4808d8a261005391388b85da79e4c5396bdded6e7e5ce3a3a23e7359d1aa1fb983b4324f97e0afec6e8ed9d898322ca258dd7cda654456dd7e84c9cbd509df

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

      Filesize

      944B

      MD5

      4093e5ab3812960039eba1a814c2ffb0

      SHA1

      b5e4a98a80be72fccd3cc910e93113d2febef298

      SHA256

      c0794e2b7036ce5612446a8b15e0c8387773bbc921f63cf8849f8a1f4ef3878c

      SHA512

      f3555b45aa1a1dd5214716dc81a05905c4ecd5a3e1276d35e08c65623ab1d14d469b3b576a5d9638264c1222d73889d2cc1ee43fb579d9ca3fcddd9f557cac7b

    • C:\Users\Admin\AppData\Local\Packages\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\AC\BackgroundTransferApi\91e222a9-6019-4013-a6fa-4ab3a0fd5b9d.down_data

      Filesize

      555KB

      MD5

      5683c0028832cae4ef93ca39c8ac5029

      SHA1

      248755e4e1db552e0b6f8651b04ca6d1b31a86fb

      SHA256

      855abd360d8a8d6974eba92b70cbd09ce519bc8773439993f9ab37cb6847309e

      SHA512

      aba434bd29be191c823b02ea9b639beb10647bbe7759bbffdaa790dfb1ec2c58d74c525ef11aacda209e4effe322d1d3a07b115446c8914b07a3bce4d8a0e2c3

    • C:\Users\Admin\AppData\Local\Temp\Windows Session Start-Up.exe

      Filesize

      138KB

      MD5

      de82040516bdddfa1ae7cd25ff1d8821

      SHA1

      510e369380576be42c34602f011ebe1ca7857d96

      SHA256

      996b01d648030939599a70593631cca8ef57ee681e0bac831282bff157a52e9f

      SHA512

      a6bcca6ddc6d312c339537f2593eeb2ded6a4444e648a58d61d7c24724bc2ec097054fdb4101c306d1af191832755b9f2bbbc01df24da74a5a12042d9f6c5e86

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3pkfrian.gxt.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • memory/1700-143-0x0000020C3DFF0000-0x0000020C3DFF8000-memory.dmp

      Filesize

      32KB

    • memory/1700-127-0x0000020C39900000-0x0000020C39910000-memory.dmp

      Filesize

      64KB

    • memory/1700-111-0x0000020C39800000-0x0000020C39810000-memory.dmp

      Filesize

      64KB

    • memory/1948-0-0x00007FFE47C33000-0x00007FFE47C35000-memory.dmp

      Filesize

      8KB

    • memory/1948-55-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

      Filesize

      10.8MB

    • memory/1948-2-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

      Filesize

      10.8MB

    • memory/1948-1-0x0000000000DB0000-0x0000000000DD8000-memory.dmp

      Filesize

      160KB

    • memory/3384-12-0x0000026C37960000-0x0000026C37982000-memory.dmp

      Filesize

      136KB

    • memory/3384-13-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

      Filesize

      10.8MB

    • memory/3384-3-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

      Filesize

      10.8MB

    • memory/3384-14-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

      Filesize

      10.8MB

    • memory/3384-15-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

      Filesize

      10.8MB

    • memory/3384-16-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

      Filesize

      10.8MB

    • memory/3384-19-0x00007FFE47C30000-0x00007FFE486F2000-memory.dmp

      Filesize

      10.8MB

    • memory/4620-152-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-163-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-150-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-151-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-148-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-153-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-154-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-155-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-157-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-158-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-160-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-162-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-161-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-159-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-156-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-149-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-164-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-165-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-166-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-168-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-167-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-169-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-170-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-172-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-173-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-174-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-176-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-177-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-175-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-171-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB

    • memory/4620-147-0x000001CD57BA0000-0x000001CD57BB0000-memory.dmp

      Filesize

      64KB