Malware Analysis Report

2025-01-18 04:18

Sample ID 231231-31myaagcgl
Target bingo.exe
SHA256 53ee3b2954f11ef1198fdb8cecf1fdd16d07abde3a60a87285324d6e4b1146aa
Tags
office04 quasar persistence spyware 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

53ee3b2954f11ef1198fdb8cecf1fdd16d07abde3a60a87285324d6e4b1146aa

Threat Level: Known bad

The file bingo.exe was found to be: Known bad.

Malicious Activity Summary

office04 quasar persistence spyware trojan

Quasar family

Quasar payload

Quasar RAT

Modifies Installed Components in the registry

Enumerates connected drives

Drops file in Windows directory

Unsigned PE

Creates scheduled task(s)

Suspicious use of SetWindowsHookEx

Suspicious use of AdjustPrivilegeToken

Checks SCSI registry key(s)

Modifies Internet Explorer settings

Modifies registry class

Suspicious use of FindShellTrayWindow

Suspicious use of SendNotifyMessage

Suspicious use of WriteProcessMemory

Enumerates system info in registry

Uses Task Scheduler COM API

Suspicious behavior: GetForegroundWindowSpam

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-31 23:59

Signatures

Quasar family

quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-31 23:58

Reported

2024-01-01 00:02

Platform

win10-20231215-en

Max time kernel

179s

Max time network

197s

Command Line

werfault.exe /h /shared Global\905f469d687e4d4ea10c950d83b75cf0 /t 3208 /p 3204

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A

Modifies Installed Components in the registry

persistence
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000\Software\Microsoft\Active Setup\Installed Components C:\Windows\explorer.exe N/A

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\D: C:\Windows\explorer.exe N/A
File opened (read-only) \??\F: C:\Windows\explorer.exe N/A

Drops file in Windows directory

Description Indicator Process Target
File created C:\Windows\rescache\_merged\4032412167\2900507189.pri C:\Windows\explorer.exe N/A
File created C:\Windows\rescache\_merged\2717123927\3950266016.pri C:\Windows\explorer.exe N/A
File created C:\Windows\rescache\_merged\1601268389\3877292338.pri C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A

Checks SCSI registry key(s)

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\Properties\{51236583-0c4a-4fe8-b81f-166aec13f510}\0064 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\Properties\{51236583-0c4a-4fe8-b81f-166aec13f510}\0064 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\Properties\{51236583-0c4a-4fe8-b81f-166aec13f510}\0064 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{afd97640-86a3-4210-b67c-289c41aabe55}\0003 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\Properties\{8c7ed206-3f8a-4827-b3ab-ae9e1faefc6c}\0002 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002 C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\ConfigFlags C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\Properties\{afd97640-86a3-4210-b67c-289c41aabe55}\0003 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\HardwareID C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\HardwareID C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\Properties\{a45c254e-df1c-4efd-8020-67d146a850e0}\0011 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\Properties\{afd97640-86a3-4210-b67c-289c41aabe55}\0002 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\Properties\{a45c254e-df1c-4efd-8020-67d146a850e0}\0011 C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\HardwareID C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\HardwareID C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\Capabilities C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Capabilities C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\Properties\{afd97640-86a3-4210-b67c-289c41aabe55}\0002 C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{51236583-0c4a-4fe8-b81f-166aec13f510}\0064 C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\ConfigFlags C:\Windows\explorer.exe N/A
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\Properties\{8c7ed206-3f8a-4827-b3ab-ae9e1faefc6c}\0002 C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\Capabilities C:\Windows\explorer.exe N/A
Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\Capabilities C:\Windows\explorer.exe N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Enumerates system info in registry

Description Indicator Process Target
Key opened \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A

Modifies Internet Explorer settings

adware spyware
Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000\Software\Microsoft\Internet Explorer\GPU C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A

Modifies registry class

Description Indicator Process Target
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DomStorageState C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings C:\Windows\explorer.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\CLSID\{018D5C66-4533-4307-9B53-224DE2ED1FE6}\Instance C:\Windows\explorer.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Settings\Cache\History\CachePrefix = "Visited:" C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\microsoft.windows.cortana C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "152" C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total\ = "185" C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.cortana C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.cortana\ = "23" C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\TrayNotify C:\Windows\explorer.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.cortana C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\microsoft.windows.cortana\ = "56" C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Settings\Cache\Content\CachePrefix C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (str) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Settings\Cache\Cookies\CachePrefix = "Cookie:" C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\EdpDomStorage C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{1f3427c8-5c10-4210-aa03-2ee45287d668}\Instance C:\Windows\explorer.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\Total C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.cortana\Total = "23" C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\DOMStorage\windows.cortana\Total = "56" C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (int) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\TrayNotify\UserStartTime = "133471088902041236" C:\Windows\explorer.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell C:\Windows\explorer.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\NodeSlots C:\Windows\explorer.exe N/A
Key created \REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{4336a54d-038b-4685-ab02-99bb52d3fb8b}\Instance C:\Windows\explorer.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\Total C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\TrayNotify\IconStreams = 14000000070000000100010005000000140000007b005300330038004f0053003400300034002d0031005100340033002d0034003200530032002d0039003300300035002d00360037005100520030004f003200380053005000320033007d005c0072006b006300790062006500720065002e0072006b0072000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000001c100000000000002000000e80701004100720067006a006200650078002000200033000a005600610067007200650061007200670020006e007000700072006600660000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000074ae2078e323294282c1e41cb67d5b9c0000000000000000000000000f123292453cda0100000000000000000000000000000d20feb05a007600700065006200660062007300670020004a0076006100710062006a006600000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000007b005300330038004f0053003400300034002d0031005100340033002d0034003200530032002d0039003300300035002d00360037005100520030004f003200380053005000320033007d005c0072006b006300790062006500720065002e0072006b00720000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000640000000000000002000000e80701004600630072006e0078007200650066003a0020003600370025000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000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C:\Windows\explorer.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU C:\Windows\explorer.exe N/A
Set value (data) \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\Shell\BagMRU\MRUListEx = ffffffff C:\Windows\explorer.exe N/A
Key created \REGISTRY\USER\S-1-5-21-1968775928-2924269989-3510977013-1000_Classes\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.cortana_cw5n1h2txyewy\Internet Explorer\EdpDomStorage\windows.cortana C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A

Suspicious behavior: GetForegroundWindowSpam

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

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\bingo.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A
Token: SeShutdownPrivilege N/A C:\Windows\explorer.exe N/A
Token: SeCreatePagefilePrivilege N/A C:\Windows\explorer.exe N/A

Suspicious use of FindShellTrayWindow

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

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2280 wrote to memory of 4236 N/A C:\Users\Admin\AppData\Local\Temp\bingo.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2280 wrote to memory of 4236 N/A C:\Users\Admin\AppData\Local\Temp\bingo.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

C:\Windows\system32\werfault.exe

werfault.exe /h /shared Global\905f469d687e4d4ea10c950d83b75cf0 /t 3208 /p 3204

C:\Windows\explorer.exe

explorer.exe

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe

"C:\Windows\SystemApps\Microsoft.Windows.Cortana_cw5n1h2txyewy\SearchUI.exe" -ServerName:CortanaUI.AppXa50dqqa5gqv4a428c9y1jjw7m3btvepj.mca

Network

Country Destination Domain Proto
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 209.80.50.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp

Files

memory/2280-0-0x0000000000BF0000-0x0000000000F14000-memory.dmp

memory/2280-1-0x00007FFFD9A60000-0x00007FFFDA44C000-memory.dmp

memory/2280-2-0x000000001BED0000-0x000000001BEE0000-memory.dmp

memory/2280-4-0x00007FFFD9A60000-0x00007FFFDA44C000-memory.dmp

memory/4508-5-0x0000000003510000-0x0000000003511000-memory.dmp

memory/4800-12-0x0000029002880000-0x00000290028A0000-memory.dmp

memory/4800-14-0x0000029002A00000-0x0000029002A20000-memory.dmp

memory/2280-57-0x000000001BED0000-0x000000001BEE0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-31 23:58

Reported

2024-01-01 00:03

Platform

win10v2004-20231215-en

Max time kernel

186s

Max time network

200s

Command Line

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

Signatures

Quasar RAT

trojan spyware quasar

Quasar payload

Description Indicator Process Target
N/A N/A N/A N/A

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\SYSTEM32\schtasks.exe N/A

Suspicious use of AdjustPrivilegeToken

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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2224 wrote to memory of 3552 N/A C:\Users\Admin\AppData\Local\Temp\bingo.exe C:\Windows\SYSTEM32\schtasks.exe
PID 2224 wrote to memory of 3552 N/A C:\Users\Admin\AppData\Local\Temp\bingo.exe C:\Windows\SYSTEM32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\SYSTEM32\schtasks.exe

"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f

Network

Country Destination Domain Proto
US 20.231.121.79:80 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 23.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 73.239.69.13.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp

Files

memory/2224-0-0x00000000007A0000-0x0000000000AC4000-memory.dmp

memory/2224-1-0x00007FFCE32C0000-0x00007FFCE3D81000-memory.dmp

memory/2224-2-0x00000000012A0000-0x00000000012B0000-memory.dmp

memory/2224-4-0x00007FFCE32C0000-0x00007FFCE3D81000-memory.dmp

memory/2224-5-0x00000000012A0000-0x00000000012B0000-memory.dmp