Malware Analysis Report

2024-09-11 13:00

Sample ID 240613-v7elgsxdld
Target RobloxPlayerInstaller.exe
SHA256 5eac06573fb9289a5ad1dfa8b88d2d7b79f1bd89e61c53247f8cae50143e7a2c
Tags
evasion trojan
score
6/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
6/10

SHA256

5eac06573fb9289a5ad1dfa8b88d2d7b79f1bd89e61c53247f8cae50143e7a2c

Threat Level: Shows suspicious behavior

The file RobloxPlayerInstaller.exe was found to be: Shows suspicious behavior.

Malicious Activity Summary

evasion trojan

Checks whether UAC is enabled

Drops file in Windows directory

Enumerates system info in registry

Modifies data under HKEY_USERS

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of SetWindowsHookEx

MITRE ATT&CK Matrix V13

Initial Access
TA0001
Execution
TA0002
Persistence
TA0003
Privilege Escalation
TA0004
Defense Evasion
TA0005
Credential Access
TA0006
Discovery
TA0007
System Information Discovery
T1082
Query Registry
T1012
Lateral Movement
TA0008
Collection
TA0009
Exfiltration
TA0010
Command and Control
TA0011
Impact
TA0040
Resource Development
TA0042
Reconnaissance
TA0043

Analysis: static1

Detonation Overview

Reported

2024-06-13 17:37

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-13 17:37

Reported

2024-06-13 18:09

Platform

win11-20240419-en

Max time kernel

1799s

Max time network

1690s

Command Line

"C:\Users\Admin\AppData\Local\Temp\RobloxPlayerInstaller.exe"

Signatures

Checks whether UAC is enabled

evasion trojan
Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA C:\Users\Admin\AppData\Local\Temp\RobloxPlayerInstaller.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\Panther\UnattendGC\diagwrn.xml C:\Windows\System32\oobe\UserOOBEBroker.exe N/A
File opened for modification C:\Windows\Panther\UnattendGC\setupact.log C:\Windows\System32\oobe\UserOOBEBroker.exe N/A
File opened for modification C:\Windows\Panther\UnattendGC\setuperr.log C:\Windows\System32\oobe\UserOOBEBroker.exe N/A
File opened for modification C:\Windows\Panther\UnattendGC\diagerr.xml C:\Windows\System32\oobe\UserOOBEBroker.exe N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS C:\Users\Admin\AppData\Local\Temp\RobloxPlayerInstaller.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\BaseBoardManufacturer C:\Users\Admin\AppData\Local\Temp\RobloxPlayerInstaller.exe N/A

Modifies data under HKEY_USERS

Description Indicator Process Target
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Control Panel\International\User Profile\en-US\0409:00000409 = "1" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\Language C:\Windows\system32\LogonUI.exe N/A
Key deleted \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31} C:\Windows\system32\LogonUI.exe N/A
Key deleted \REGISTRY\USER\.DEFAULT\SOFTWARE\MICROSOFT\CTF\SORTORDER\ASSEMBLYITEM\0X00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31} C:\Windows\system32\LogonUI.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31}\00000000\CLSID = "{00000000-0000-0000-0000-000000000000}" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Control Panel\International\User Profile\en-US C:\Windows\system32\LogonUI.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Control Panel\International\User Profile\en-US\CachedLanguageName = "@Winlangdb.dll,-1121" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglowBalance = "10" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1" C:\Windows\system32\LogonUI.exe N/A
Key deleted \REGISTRY\USER\.DEFAULT\SOFTWARE\MICROSOFT\CTF\SORTORDER\LANGUAGE C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Keyboard Layout\Preload C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Keyboard Layout\Substitutes C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432" C:\Windows\system32\LogonUI.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Keyboard Layout\Preload\1 = "00000409" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\TIP C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\HiddenDummyLayouts C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31}\00000000 C:\Windows\system32\LogonUI.exe N/A
Key deleted \REGISTRY\USER\.DEFAULT\SOFTWARE\MICROSOFT\CTF\SORTORDER\ASSEMBLYITEM\0X00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31}\00000000 C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31} C:\Windows\system32\LogonUI.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00 C:\Windows\system32\LogonUI.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\Language\00000000 = "00000409" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Control Panel\International\User Profile\ShowShiftLock = "1" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "143" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409 C:\Windows\system32\LogonUI.exe N/A
Set value (str) \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31}\00000000\Profile = "{00000000-0000-0000-0000-000000000000}" C:\Windows\system32\LogonUI.exe N/A
Key deleted \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31}\00000000 C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292114432" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268" C:\Windows\system32\LogonUI.exe N/A
Set value (data) \REGISTRY\USER\.DEFAULT\Control Panel\International\User Profile\Languages = 65006e002d005500530000000000 C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409\{34745C63-B2F0-4784-8B67-5E12C8701A31}\00000000\KeyboardLayout = "67699721" C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Control Panel\International\User Profile\ShowCasing = "1" C:\Windows\system32\LogonUI.exe N/A
Key deleted \REGISTRY\USER\.DEFAULT\Software\Microsoft\CTF\SortOrder\AssemblyItem\0x00000409 C:\Windows\system32\LogonUI.exe N/A
Set value (int) \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Themes\History\AutoColor = "0" C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM C:\Windows\system32\LogonUI.exe N/A
Key created \REGISTRY\USER\.DEFAULT\Control Panel\International\User Profile C:\Windows\system32\LogonUI.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\RobloxPlayerInstaller.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\RobloxPlayerInstaller.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A C:\Windows\system32\LogonUI.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\system32\LogonUI.exe N/A

Suspicious use of SetWindowsHookEx

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

Processes

C:\Users\Admin\AppData\Local\Temp\RobloxPlayerInstaller.exe

"C:\Users\Admin\AppData\Local\Temp\RobloxPlayerInstaller.exe"

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k LocalService -p -s NPSMSvc

C:\Windows\system32\svchost.exe

C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DisplayEnhancementService

C:\Windows\System32\oobe\UserOOBEBroker.exe

C:\Windows\System32\oobe\UserOOBEBroker.exe -Embedding

C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe

C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe -Embedding

C:\Windows\system32\LogonUI.exe

"LogonUI.exe" /flags:0x0 /state0:0xa3a1f855 /state1:0x41c64e6d

Network

Country Destination Domain Proto
US 8.8.8.8:53 ecsv2.roblox.com udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
N/A 127.0.0.1:49738 tcp
US 8.8.8.8:53 clientsettingscdn.roblox.com udp
N/A 127.0.0.1:49740 tcp
US 8.8.8.8:53 clientsettingscdn.roblox.com udp
N/A 127.0.0.1:49742 tcp
US 8.8.8.8:53 clientsettingscdn.roblox.com udp
N/A 127.0.0.1:49744 tcp
N/A 127.0.0.1:49746 tcp
US 8.8.8.8:53 cxcs.microsoft.net udp
US 8.8.8.8:53 cxcs.microsoft.net udp
US 8.8.8.8:53 clientsettingscdn.roblox.com udp
N/A 127.0.0.1:49748 tcp
US 8.8.8.8:53 cxcs.microsoft.net udp
US 8.8.8.8:53 cxcs.microsoft.net udp
US 8.8.8.8:53 browser.pipe.aria.microsoft.com udp
GB 92.123.128.153:443 tcp
GB 92.123.128.153:443 tcp
GB 92.123.128.153:443 tcp
GB 92.123.128.154:443 tcp
US 8.8.8.8:53 clientsettingscdn.roblox.com udp
N/A 127.0.0.1:49766 tcp
N/A 127.0.0.1:49768 tcp
GB 92.123.128.154:443 tcp
GB 92.123.128.154:443 tcp
GB 92.123.128.154:443 tcp
GB 92.123.128.161:443 tcp
GB 92.123.128.161:443 tcp
GB 92.123.128.161:443 tcp
GB 92.123.128.161:443 tcp
GB 92.123.128.161:443 tcp
GB 92.123.128.157:443 tcp
US 8.8.8.8:53 browser.pipe.aria.microsoft.com udp
GB 92.123.128.157:443 tcp
GB 92.123.128.157:443 tcp
GB 92.123.128.157:443 tcp
GB 92.123.128.157:443 tcp
GB 92.123.128.158:443 tcp
GB 92.123.128.158:443 tcp
GB 92.123.128.158:443 tcp
GB 92.123.128.158:443 tcp
GB 92.123.128.158:443 tcp
GB 92.123.128.155:443 tcp
GB 92.123.128.155:443 tcp
GB 92.123.128.163:443 tcp
US 8.8.8.8:53 browser.pipe.aria.microsoft.com udp
US 8.8.8.8:53 browser.pipe.aria.microsoft.com udp
GB 92.123.128.152:443 tcp
GB 92.123.128.156:443 tcp
US 8.8.8.8:53 browser.pipe.aria.microsoft.com udp
US 8.8.8.8:53 browser.pipe.aria.microsoft.com udp

Files

C:\ProgramData\Microsoft\Windows\SystemData\S-1-5-21-1474490143-3221292397-4168103503-1000\ReadOnly\LockScreen_Z\LockScreen___1280_0720_notdimmed.jpg

MD5 6cb7e9f13c79d1dd975a8aa005ab0256
SHA1 eac7fc28cc13ac1e9c85f828215cd61f0c698ae3
SHA256 af2537d470fddbeda270c965b8dbdf7e9ccf480ed2f525012e2f1035112a6d67
SHA512 3a40359d8e4cc8792be78a022dc04daed5c1cc55d78fe9cf3e061ea5587baa15023ce2152238f5be5cc5124cd468f220cf9dab54344d93edd3dfcd400b24469d