quasar | cf1f9aa93af680a196f52f46de82e37adf6bc7be50018d3ca3b38d6ff16df2d4

Analysis

max time kernel
460s
max time network
462s
platform
windows11-21h2_x64
resource
win11-20241007-en
resource tags

arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
submitted
15/10/2024, 00:08

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Reason

Machine shutdown

General

Target
Client-built.exe
Size 3.1MB
Sample241015-aev3jsxcnr
SHA256 cf1f9aa93af680a196f52f46de82e37adf6bc7be50018d3ca3b38d6ff16df2d4
MD5 58b8b37869465016462b7b14b86d2bb8
SHA1 b5d31e9f8691153b7716c8b5e40211556a7c5710
SHA512 9dc86b3c7a924f86108a0e013ce5859cbc9c60fc61e601378d5f4bca8d593919ccabca336b14205fd696e7b7801eff1f330a342684e488fbf43a951f8ee06b56
SSDEEP 49152:AvcI22SsaNYfdPBldt698dBcjHVGR16dbR3toGd3THHB72eh2NT:AvR22SsaNYfdPBldt6+dBcjHVGR16J
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

quasar office04 traige spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Traige

Alessandrolol66-30592.portmap.host:30592

Mutex

45bdc82f-bdfb-446e-af9c-d0a46e53752d

Attributes

encryption_key
B11D992865826F9FDFE1488DBCF3B1031C9ED9CB
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Windows.Sys
subdirectory
SubDir

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

HomoThugger-36407.portmap.host:36407

Mutex

42d6f4c0-e8fc-473a-b92d-ded3fb29334a

Attributes

encryption_key
3CDA48FEB25557C87485A9F37CDC861398BEA3C7
install_name
Client.exe
log_directory
Logs
reconnect_delay
3000
startup_key
Quasar Client Startup
subdirectory
SubDir

Signatures

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

Quasar payload 4 IoCs

resource	yara_rule
behavioral3/memory/2160-1-0x0000000000C40000-0x0000000000F64000-memory.dmp	family_quasar
behavioral3/files/0x001c00000002aa75-6.dat	family_quasar
behavioral3/files/0x001c00000002aa87-22.dat	family_quasar
behavioral3/memory/4412-29-0x00000000000A0000-0x00000000003C4000-memory.dmp	family_quasar

Executes dropped EXE 3 IoCs

pid	Process
2452	Client.exe
4412	fRodFduszWtB.exe
32	tMwK0LQ9bjEA.exe

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

System Information Discovery
T1082

Modifies data under HKEY_USERS 15 IoCs

description	ioc	Process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationColor = "3288365268"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292114432"	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\CurrentVersion\Themes\History\AutoColor = "0"	LogonUI.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationGlassAttribute = "1"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\StartColorMenu = "4290799360"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\AccentColor = "4292114432"	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\ColorizationAfterglow = "3288365268"	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
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = 99ebff004cc2ff000091f8000078d4000067c000003e9200001a6800f7630c00	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\EnableWindowColorization = "186"	LogonUI.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
2044	schtasks.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2160	Client-built.exe
Token: SeDebugPrivilege	2452	Client.exe
Token: SeDebugPrivilege	4412	fRodFduszWtB.exe
Token: SeDebugPrivilege	32	tMwK0LQ9bjEA.exe
Token: SeShutdownPrivilege	2452	Client.exe
Token: SeCreatePagefilePrivilege	2452	Client.exe
Token: SeShutdownPrivilege	3976	shutdown.exe
Token: SeRemoteShutdownPrivilege	3976	shutdown.exe

Suspicious use of FindShellTrayWindow 3 IoCs

pid	Process
4412	fRodFduszWtB.exe
4412	fRodFduszWtB.exe
4412	fRodFduszWtB.exe

Suspicious use of SendNotifyMessage 3 IoCs

pid	Process
4412	fRodFduszWtB.exe
4412	fRodFduszWtB.exe
4412	fRodFduszWtB.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4996	LogonUI.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 2160 wrote to memory of 2452	2160	Client-built.exe	77
PID 2160 wrote to memory of 2452	2160	Client-built.exe	77
PID 2452 wrote to memory of 4412	2452	Client.exe	79
PID 2452 wrote to memory of 4412	2452	Client.exe	79
PID 4412 wrote to memory of 2044	4412	fRodFduszWtB.exe	80
PID 4412 wrote to memory of 2044	4412	fRodFduszWtB.exe	80
PID 2452 wrote to memory of 32	2452	Client.exe	82
PID 2452 wrote to memory of 32	2452	Client.exe	82
PID 2452 wrote to memory of 3976	2452	Client.exe	85
PID 2452 wrote to memory of 3976	2452	Client.exe	85

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\Client-built.exe
"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2160
- C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:2452
- - C:\Users\Admin\AppData\Local\Temp\fRodFduszWtB.exe
    "C:\Users\Admin\AppData\Local\Temp\fRodFduszWtB.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    - Suspicious use of FindShellTrayWindow
    - Suspicious use of SendNotifyMessage
    - Suspicious use of WriteProcessMemory
    PID:4412
  - - 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
      4⤵
      Scheduled Task/Job: Scheduled Task
      PID:2044
- - C:\Users\Admin\AppData\Local\Temp\tMwK0LQ9bjEA.exe
    "C:\Users\Admin\AppData\Local\Temp\tMwK0LQ9bjEA.exe"
    3⤵
    - Executes dropped EXE
    - Suspicious use of AdjustPrivilegeToken
    PID:32
- - C:\Windows\System32\shutdown.exe
    "C:\Windows\System32\shutdown.exe" /s /t 0
    3⤵
    - Suspicious use of AdjustPrivilegeToken
    PID:3976

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa3a0c855 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:4996

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

fRodFduszWtB.exe

Path C:\Users\Admin\AppData\Local\Temp\fRodFduszWtB.exe
Size 3.1MB
SHA256 aa3170ce6b4bbd9960ac0ccd60f7d0b39cc0d28254bfe73545b540cbd8444b21
MD5 e35d832888fda0fd705386a4b94ecc49
SHA1 86380c3eea496c7947c25c547748cfeed51c4de9
SHA512 60d6aec705948474fa007dad26fdba9b92dcb1098aefb4eed2898af7b048729e4a3ee5af7e7b9ca9e555b97b54f6d97007dfc1531d0abb9e5da01b5911c5fd63
SSDEEP 49152:Av4lL26AaNeWgPhlmVqvMQ7XSKNEREuY4oGdPwTHHB72eh2NT:AvQL26AaNeWgPhlmVqkQ7XSKmREuT
MD5 SHA1 SHA512 SSDEEP

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Client.exe

Path C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
Size 3.1MB
SHA256 cf1f9aa93af680a196f52f46de82e37adf6bc7be50018d3ca3b38d6ff16df2d4
MD5 58b8b37869465016462b7b14b86d2bb8
SHA1 b5d31e9f8691153b7716c8b5e40211556a7c5710
SHA512 9dc86b3c7a924f86108a0e013ce5859cbc9c60fc61e601378d5f4bca8d593919ccabca336b14205fd696e7b7801eff1f330a342684e488fbf43a951f8ee06b56
SSDEEP 49152:AvcI22SsaNYfdPBldt698dBcjHVGR16dbR3toGd3THHB72eh2NT:AvR22SsaNYfdPBldt6+dBcjHVGR16J
MD5 SHA1 SHA512 SSDEEP

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memory/2160-0-0x00007FFF55633000-0x00007FFF55635000-memory.dmp

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memory/2160-1-0x0000000000C40000-0x0000000000F64000-memory.dmp

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memory/2160-2-0x00007FFF55630000-0x00007FFF560F2000-memory.dmp

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memory/2160-9-0x00007FFF55630000-0x00007FFF560F2000-memory.dmp

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memory/2452-10-0x00007FFF55630000-0x00007FFF560F2000-memory.dmp

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memory/2452-12-0x000000001C400000-0x000000001C4B2000-memory.dmp

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memory/2452-11-0x000000001BF90000-0x000000001BFE0000-memory.dmp

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memory/2452-16-0x000000001C340000-0x000000001C37C000-memory.dmp

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memory/2452-15-0x0000000003570000-0x0000000003582000-memory.dmp

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memory/2452-17-0x00007FFF55630000-0x00007FFF560F2000-memory.dmp

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memory/2452-8-0x00007FFF55630000-0x00007FFF560F2000-memory.dmp

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memory/2452-42-0x00007FFF55630000-0x00007FFF560F2000-memory.dmp

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memory/4412-29-0x00000000000A0000-0x00000000003C4000-memory.dmp

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Analysis

Sharing

Errors

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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