Malware Analysis Report

2025-08-10 21:20

Sample ID 241031-l5tsyswemb
Target Koa_Paid_Tweak_Tool.bat
SHA256 fb97d6ec1b1de59c4f02b55c8f95e756a13f9119f4bd08e77e832890ae529317
Tags
evasion execution trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fb97d6ec1b1de59c4f02b55c8f95e756a13f9119f4bd08e77e832890ae529317

Threat Level: Known bad

The file Koa_Paid_Tweak_Tool.bat was found to be: Known bad.

Malicious Activity Summary

evasion execution trojan

UAC bypass

Command and Scripting Interpreter: PowerShell

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Uses Volume Shadow Copy service COM API

Checks SCSI registry key(s)

Delays execution with timeout.exe

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-10-31 10:07

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-10-31 10:07

Reported

2024-10-31 10:10

Platform

win11-20241007-en

Max time kernel

92s

Max time network

102s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Koa_Paid_Tweak_Tool.bat"

Signatures

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\system32\reg.exe N/A

Command and Scripting Interpreter: PowerShell

execution
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

Checks SCSI registry key(s)

Description Indicator Process Target
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters C:\Windows\system32\vssvc.exe N/A
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr C:\Windows\system32\vssvc.exe N/A
Set value (data) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr\PartitionTableCache = 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 C:\Windows\system32\vssvc.exe N/A
Set value (data) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr\SnapshotDataCache = 534e41505041525401000000700000008ec7416a0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 C:\Windows\system32\vssvc.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters C:\Windows\system32\vssvc.exe N/A

Delays execution with timeout.exe

evasion
Description Indicator Process Target
N/A N/A C:\Windows\system32\timeout.exe N/A
N/A N/A C:\Windows\system32\timeout.exe N/A
N/A N/A C:\Windows\system32\timeout.exe N/A
N/A N/A C:\Windows\system32\timeout.exe N/A
N/A N/A C:\Windows\system32\timeout.exe N/A
N/A N/A C:\Windows\system32\timeout.exe N/A
N/A N/A C:\Windows\system32\timeout.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Windows\system32\SystemPropertiesPerformance.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\srtasks.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2172 wrote to memory of 3808 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3808 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3096 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3096 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 2080 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 2080 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3856 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3856 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1732 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1732 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 2076 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2172 wrote to memory of 2076 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2172 wrote to memory of 5068 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2172 wrote to memory of 5068 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 2172 wrote to memory of 364 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\chcp.com
PID 2172 wrote to memory of 364 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\chcp.com
PID 2172 wrote to memory of 3244 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 2172 wrote to memory of 3244 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 2172 wrote to memory of 1844 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1844 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3508 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 3508 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 2988 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 2988 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 2352 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 2352 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 1964 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1964 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3120 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 3120 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 4724 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 4724 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1636 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1636 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 4532 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 4532 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3088 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3088 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1448 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 1448 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 2296 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 2296 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3640 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 3640 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 1160 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1160 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 2144 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 2144 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 3164 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 3164 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 2172 wrote to memory of 1684 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 1684 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\timeout.exe
PID 2172 wrote to memory of 4564 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 2172 wrote to memory of 4564 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 2172 wrote to memory of 4428 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\SystemPropertiesPerformance.exe
PID 2172 wrote to memory of 4428 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\SystemPropertiesPerformance.exe

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Koa_Paid_Tweak_Tool.bat"

C:\Windows\system32\reg.exe

Reg.exe ADD "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v "EnableLUA" /t REG_DWORD /d "0" /f

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\CONSOLE" /v "VirtualTerminalLevel" /t REG_DWORD /d "1" /f

C:\Windows\system32\reg.exe

Reg.exe delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\SystemRestore" /v "RPSessionInterval" /f

C:\Windows\system32\reg.exe

Reg.exe delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\SystemRestore" /v "DisableConfig" /f

C:\Windows\system32\reg.exe

Reg.exe add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "SystemRestorePointCreationFrequency" /t REG_DWORD /d 0 /f

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -ExecutionPolicy Unrestricted -NoProfile Enable-ComputerRestore -Drive 'C:\'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -ExecutionPolicy Bypass -Command "Checkpoint-Computer -Description 'KoaPaid' -RestorePointType 'MODIFY_SETTINGS'"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\system32\srtasks.exe

C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "prompt #$H#$E# & echo on & for %b in (1) do rem"

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Accessibility\Keyboard Response" /v "Flags" /t REG_SZ /d "122" /f

C:\Windows\system32\timeout.exe

timeout /t 1 /nobreak

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Accessibility\ToggleKeys" /v "Flags" /t REG_SZ /d "58" /f

C:\Windows\system32\timeout.exe

timeout /t 1 /nobreak

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Accessibility\StickyKeys" /v "Flags" /t REG_SZ /d "506" /f

C:\Windows\system32\timeout.exe

timeout /t 1 /nobreak

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Accessibility\MouseKeys" /v "Flags" /t REG_SZ /d "0" /f

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Mouse" /v "MouseSpeed" /t REG_SZ /d "0" /f

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Mouse" /v "MouseThreshold1" /t REG_SZ /d "0" /f

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Mouse" /v "MouseThreshold2" /t REG_SZ /d "0" /f

C:\Windows\system32\timeout.exe

timeout /t 1 /nobreak

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Mouse" /v "MouseSensitivity" /t REG_SZ /d "10" /f

C:\Windows\system32\timeout.exe

timeout /t 1 /nobreak

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Keyboard" /v "KeyboardDelay" /t REG_SZ /d "0" /f

C:\Windows\system32\timeout.exe

timeout /t 1 /nobreak

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\Control Panel\Keyboard" /v "KeyboardSpeed" /t REG_SZ /d "31" /f

C:\Windows\system32\timeout.exe

timeout /t 1 /nobreak

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "prompt #$H#$E# & echo on & for %b in (1) do rem"

C:\Windows\system32\SystemPropertiesPerformance.exe

C:\Windows\system32\SystemPropertiesPerformance.exe

Network

Country Destination Domain Proto
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

memory/2076-0-0x00007FFC74B53000-0x00007FFC74B55000-memory.dmp

memory/2076-1-0x000001DB56B40000-0x000001DB56B62000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3xavvjip.bda.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/2076-10-0x00007FFC74B50000-0x00007FFC75612000-memory.dmp

memory/2076-11-0x00007FFC74B50000-0x00007FFC75612000-memory.dmp

memory/2076-12-0x00007FFC74B50000-0x00007FFC75612000-memory.dmp

memory/2076-15-0x00007FFC74B50000-0x00007FFC75612000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 88dc70c361a22feac57b031dd9c1f02f
SHA1 a9b4732260c2a323750022a73480f229ce25d46d
SHA256 43244c0820ec5074e654ecd149fa744f51b2c1522e90285567713dae64b62f59
SHA512 19c0532741ebc9751390e6c5ca593a81493652f25c74c8cab29a8b5b1f1efef8d511254a04f50b0c4a20724bae10d96d52af7a76b0c85ddc5f020d4cac41100c

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

MD5 5caad758326454b5788ec35315c4c304
SHA1 3aef8dba8042662a7fcf97e51047dc636b4d4724
SHA256 83e613b6dc8d70e3bb67c58535e014f58f3e8b2921e93b55137d799fc8c56391
SHA512 4e0d443cf81e2f49829b0a458a08294bf1bdc0e38d3a938fb8274eeb637d9a688b14c7999dd6b86a31fcec839a9e8c1a9611ed0bbae8bd59caa9dba1e8253693

Analysis: behavioral2

Detonation Overview

Submitted

2024-10-31 10:07

Reported

2024-10-31 10:10

Platform

win10v2004-20241007-en

Max time kernel

105s

Max time network

136s

Command Line

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Koa_Paid_Tweak_Tool.bat"

Signatures

UAC bypass

evasion trojan
Description Indicator Process Target
Set value (int) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0" C:\Windows\system32\reg.exe N/A

Command and Scripting Interpreter: PowerShell

execution
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

Checks SCSI registry key(s)

Description Indicator Process Target
Set value (data) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr\SnapshotDataCache = 534e41505041525401000000700000008ec7416a0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 C:\Windows\system32\vssvc.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters C:\Windows\system32\vssvc.exe N/A
Key queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters C:\Windows\system32\vssvc.exe N/A
Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr C:\Windows\system32\vssvc.exe N/A
Set value (data) \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\Device Parameters\Partmgr\PartitionTableCache = 00000000040000001397c7f967de25740000000000000000000000000000000000000000000000000000000000000000000000000000000000001000000000000000c01200000000ffffffff0000000027010100000800001397c7f90000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000d01200000000000020ed3a000000ffffffff0000000007000100006809001397c7f9000000000000d012000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000f0ff3a0000000000000005000000ffffffff000000000700010000f87f1d1397c7f9000000000000f0ff3a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000ffffffff0000000000000000000000001397c7f900000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000 C:\Windows\system32\vssvc.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeAuditPrivilege N/A C:\Windows\system32\vssvc.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeRestorePrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeSecurityPrivilege N/A C:\Windows\system32\srtasks.exe N/A
Token: SeTakeOwnershipPrivilege N/A C:\Windows\system32\srtasks.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3732 wrote to memory of 1420 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 1420 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 4452 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 4452 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 3648 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 3648 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 5012 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 5012 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 1760 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 1760 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\reg.exe
PID 3732 wrote to memory of 916 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3732 wrote to memory of 916 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3732 wrote to memory of 2276 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3732 wrote to memory of 2276 N/A C:\Windows\system32\cmd.exe C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
PID 3732 wrote to memory of 2916 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\chcp.com
PID 3732 wrote to memory of 2916 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\chcp.com
PID 3732 wrote to memory of 3924 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe
PID 3732 wrote to memory of 3924 N/A C:\Windows\system32\cmd.exe C:\Windows\system32\cmd.exe

Uses Volume Shadow Copy service COM API

ransomware

Processes

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\Koa_Paid_Tweak_Tool.bat"

C:\Windows\system32\reg.exe

Reg.exe ADD "HKLM\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v "EnableLUA" /t REG_DWORD /d "0" /f

C:\Windows\system32\reg.exe

Reg.exe add "HKCU\CONSOLE" /v "VirtualTerminalLevel" /t REG_DWORD /d "1" /f

C:\Windows\system32\reg.exe

Reg.exe delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\SystemRestore" /v "RPSessionInterval" /f

C:\Windows\system32\reg.exe

Reg.exe delete "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\WindowsNT\CurrentVersion\SystemRestore" /v "DisableConfig" /f

C:\Windows\system32\reg.exe

Reg.exe add "HKLM\Software\Microsoft\Windows NT\CurrentVersion\SystemRestore" /v "SystemRestorePointCreationFrequency" /t REG_DWORD /d 0 /f

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -ExecutionPolicy Unrestricted -NoProfile Enable-ComputerRestore -Drive 'C:\'

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe

powershell -ExecutionPolicy Bypass -Command "Checkpoint-Computer -Description 'KoaPaid' -RestorePointType 'MODIFY_SETTINGS'"

C:\Windows\system32\vssvc.exe

C:\Windows\system32\vssvc.exe

C:\Windows\system32\srtasks.exe

C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2

C:\Windows\system32\chcp.com

chcp 65001

C:\Windows\system32\cmd.exe

C:\Windows\system32\cmd.exe /c "prompt #$H#$E# & echo on & for %b in (1) do rem"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 68.209.201.84.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 167.57.26.184.in-addr.arpa udp
US 8.8.8.8:53 197.87.175.4.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp

Files

memory/916-0-0x00007FFB99D13000-0x00007FFB99D15000-memory.dmp

memory/916-6-0x000002D52FDC0000-0x000002D52FDE2000-memory.dmp

C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_xuyqvopq.5zq.ps1

MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

memory/916-11-0x00007FFB99D10000-0x00007FFB9A7D1000-memory.dmp

memory/916-12-0x00007FFB99D10000-0x00007FFB9A7D1000-memory.dmp

memory/916-15-0x00007FFB99D10000-0x00007FFB9A7D1000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

MD5 6cf293cb4d80be23433eecf74ddb5503
SHA1 24fe4752df102c2ef492954d6b046cb5512ad408
SHA256 b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8
SHA512 0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

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

MD5 d8b9a260789a22d72263ef3bb119108c
SHA1 376a9bd48726f422679f2cd65003442c0b6f6dd5
SHA256 d69d47e428298f194850d14c3ce375e7926128a0bfb62c1e75940ab206f8fddc
SHA512 550314fab1e363851a7543c989996a440d95f7c9db9695cce5abaad64523f377f48790aa091d66368f50f941179440b1fa94448289ee514d5b5a2f4fe6225e9b