quasar | 31d1488e6d5e80fd6d1aba0b73f3ff7ca69d65f649298358acff26aceffdca57

Reason

Machine shutdown

General

Target

Quasar.exe
Size

1.2MB
MD5

061e986ef7b1a4c883f0da79f96537c0
SHA1

1ec4496a6dd4e0eae05cff977ae6d0fcb77dd022
SHA256

31d1488e6d5e80fd6d1aba0b73f3ff7ca69d65f649298358acff26aceffdca57
SHA512

cd68ed61957b3aaed5eba72a44c81adf04712710355ab742f23d34725801efe82cc57a37390ae61bf32f4d4fae12c5165642c32076faa5005af634febff9ed91
SSDEEP

12288:NJqRU1HYLsYebQNVBBBYiL9l/bFfpBBBBBBBBBBBBk5:vtYBBBYiLvzFfpBBBBBBBBBBBBk5

Score

10^/10

quasar spyware trojan

Malware Config

Signatures

Quasar RAT
Quasar is an open source Remote Access Tool.
trojan spyware quasar

Quasar payload 1 IoCs

Processes:

resource	yara_rule
behavioral2/memory/2908-0-0x0000027FA6A30000-0x0000027FA6B6C000-memory.dmp	family_quasar

Checks SCSI registry key(s) 3 TTPs 3 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

taskmgr.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000	taskmgr.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{b725f130-47ef-101a-a5f1-02608c9eebac}\000A	taskmgr.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColorBalance = "89"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365271"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationBlurBalance = "1"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	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\AccentColor = "4292311040"	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\ColorizationAfterglowBalance = "10"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "237"	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\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365271"	LogonUI.exe
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

Suspicious behavior: EnumeratesProcesses 20 IoCs

Processes:

taskmgr.exe

pid	process
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

Quasar.exetaskmgr.exe

description	pid	process
Token: SeDebugPrivilege	2908	Quasar.exe
Token: SeDebugPrivilege	4060	taskmgr.exe
Token: SeSystemProfilePrivilege	4060	taskmgr.exe
Token: SeCreateGlobalPrivilege	4060	taskmgr.exe
Token: 33	4060	taskmgr.exe
Token: SeIncBasePriorityPrivilege	4060	taskmgr.exe

Suspicious use of FindShellTrayWindow 44 IoCs

Processes:

taskmgr.exe

pid	process
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe

Suspicious use of SendNotifyMessage 44 IoCs

Processes:

taskmgr.exe

pid	process
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe
4060	taskmgr.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LogonUI.exe

pid process

4784 LogonUI.exe

pid	process
4784	LogonUI.exe

C:\Users\Admin\AppData\Local\Temp\Quasar.exe
"C:\Users\Admin\AppData\Local\Temp\Quasar.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2908

C:\Windows\system32\taskmgr.exe
"C:\Windows\system32\taskmgr.exe" /4
1⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
PID:4060

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3962055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4784

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

Peripheral Device Discovery

1

T1120

System Information Discovery

1

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

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Downloads

memory/2908-0-0x0000027FA6A30000-0x0000027FA6B6C000-memory.dmp

Filesize
1.2MB

Download
memory/2908-1-0x00007FFAF4F43000-0x00007FFAF4F45000-memory.dmp

Filesize
8KB

Download
memory/2908-2-0x00007FFAF4F40000-0x00007FFAF5A01000-memory.dmp

Filesize
10.8MB

Download
memory/2908-3-0x00007FFAF4F40000-0x00007FFAF5A01000-memory.dmp

Filesize
10.8MB

Download
memory/4060-4-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-6-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-5-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-16-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-15-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-14-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-13-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-12-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-11-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download
memory/4060-10-0x000001170CB20000-0x000001170CB21000-memory.dmp

Filesize
4KB

Download

Analysis

Sharing

Errors

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads