quasar | f0160a1f7a39862e14063ac468957559656405f51d97ad56dc7cff9ad34da9f1

Reason

Machine shutdown

General

Target

Synapse X Launcher.exe
Size

3.1MB
MD5

1a1fda92143e414b4d4153ab05dd1ce8
SHA1

33ac2b2d228a1ec93b0ea70ffadb436933b9a1e5
SHA256

f0160a1f7a39862e14063ac468957559656405f51d97ad56dc7cff9ad34da9f1
SHA512

70a9a6948f98f3bdc2c7b461634098347bdf683dec36fa92bd1ac652f72daf7fa01f842cbb8331f26c9c5f76907604f75f7c45b746bcfe8f395b3864f998f391
SSDEEP

49152:VvnI22SsaNYfdPBldt698dBcjHOaRJ6HbR3LoGddPkTHHB72eh2NT:VvI22SsaNYfdPBldt6+dBcjHOaRJ6Zd

Score

10^/10

quasar windows update spyware trojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Windows Update

C2

skbidiooiilet-31205.portmap.host:31205

Mutex

7357b58d-e5d4-42be-8b74-db6eee6cde6d

Attributes

encryption_key
6F721445F7E0B1CF58980D84A9D49F4458D4EFD9
install_name
Update.exe
log_directory
Logs
reconnect_delay
3000
startup_key
WindowsUpdate
subdirectory
Windows Update

Signatures

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

Quasar payload 2 IoCs

Processes:

resource	yara_rule
behavioral1/memory/4472-1-0x00000000000C0000-0x00000000003E4000-memory.dmp	family_quasar
C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe	family_quasar

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

Processes:

Update.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation Update.exe
Executes dropped EXE 1 IoCs

Processes:

Update.exe

pid process

2828 Update.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence

Scheduled Task/Job
T1053

Processes:

schtasks.exeschtasks.exe

pid process

3200 schtasks.exe
4828 schtasks.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	Update.exe

pid	process
2828	Update.exe

pid	process
3200	schtasks.exe
4828	schtasks.exe

Modifies data under HKEY_USERS 15 IoCs

Processes:

LogonUI.exe

description	ioc	process
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\DWM\EnableWindowColorization = "159"	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\Themes\History\AutoColor = "0"	LogonUI.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentPalette = a6d8ff0076b9ed00429ce3000078d700005a9e000042750000264200f7630c00	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\DWM\ColorizationAfterglow = "3288365271"	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\ColorizationColor = "3288365271"	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\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\Themes\History	LogonUI.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\Accent\AccentColorMenu = "4292311040"	LogonUI.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

Processes:

Synapse X Launcher.exeUpdate.exeshutdown.exe

description	pid	process
Token: SeDebugPrivilege	4472	Synapse X Launcher.exe
Token: SeDebugPrivilege	2828	Update.exe
Token: SeShutdownPrivilege	4328	shutdown.exe
Token: SeRemoteShutdownPrivilege	4328	shutdown.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LogonUI.exe

pid process

5064 LogonUI.exe

pid	process
5064	LogonUI.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

Synapse X Launcher.exeUpdate.exe

description	pid	process	target process
PID 4472 wrote to memory of 3200	4472	Synapse X Launcher.exe	schtasks.exe
PID 4472 wrote to memory of 3200	4472	Synapse X Launcher.exe	schtasks.exe
PID 4472 wrote to memory of 2828	4472	Synapse X Launcher.exe	Update.exe
PID 4472 wrote to memory of 2828	4472	Synapse X Launcher.exe	Update.exe
PID 2828 wrote to memory of 4828	2828	Update.exe	schtasks.exe
PID 2828 wrote to memory of 4828	2828	Update.exe	schtasks.exe
PID 2828 wrote to memory of 4328	2828	Update.exe	shutdown.exe
PID 2828 wrote to memory of 4328	2828	Update.exe	shutdown.exe

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\Synapse X Launcher.exe
"C:\Users\Admin\AppData\Local\Temp\Synapse X Launcher.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4472

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe" /rl HIGHEST /f
2⤵
- Creates scheduled task(s)
PID:3200

C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe
"C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe"
2⤵
- Checks computer location settings
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2828

C:\Windows\SYSTEM32\schtasks.exe
"schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe" /rl HIGHEST /f
3⤵
- Creates scheduled task(s)
PID:4828

C:\Windows\System32\shutdown.exe
"C:\Windows\System32\shutdown.exe" /s /t 0
3⤵
- Suspicious use of AdjustPrivilegeToken
PID:4328

C:\Windows\system32\LogonUI.exe
"LogonUI.exe" /flags:0x4 /state0:0xa396d055 /state1:0x41c64e6d
1⤵
- Modifies data under HKEY_USERS
- Suspicious use of SetWindowsHookEx
PID:5064

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

T1053

Persistence

Scheduled Task/Job

1

T1053

Privilege Escalation

Scheduled Task/Job

1

T1053

Defense Evasion

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe

Filesize
3.1MB

MD5
1a1fda92143e414b4d4153ab05dd1ce8

SHA1
33ac2b2d228a1ec93b0ea70ffadb436933b9a1e5

SHA256
f0160a1f7a39862e14063ac468957559656405f51d97ad56dc7cff9ad34da9f1

SHA512
70a9a6948f98f3bdc2c7b461634098347bdf683dec36fa92bd1ac652f72daf7fa01f842cbb8331f26c9c5f76907604f75f7c45b746bcfe8f395b3864f998f391

Download Submit
memory/2828-9-0x00007FFA96F40000-0x00007FFA97A01000-memory.dmp

Filesize
10.8MB

Download
memory/2828-11-0x00007FFA96F40000-0x00007FFA97A01000-memory.dmp

Filesize
10.8MB

Download
memory/2828-12-0x000000001B0C0000-0x000000001B110000-memory.dmp

Filesize
320KB

Download
memory/2828-13-0x000000001B7D0000-0x000000001B882000-memory.dmp

Filesize
712KB

Download
memory/2828-16-0x000000001B710000-0x000000001B722000-memory.dmp

Filesize
72KB

Download
memory/2828-17-0x000000001B770000-0x000000001B7AC000-memory.dmp

Filesize
240KB

Download
memory/2828-18-0x00007FFA96F40000-0x00007FFA97A01000-memory.dmp

Filesize
10.8MB

Download
memory/4472-0-0x00007FFA96F43000-0x00007FFA96F45000-memory.dmp

Filesize
8KB

Download
memory/4472-1-0x00000000000C0000-0x00000000003E4000-memory.dmp

Filesize
3.1MB

Download
memory/4472-2-0x00007FFA96F40000-0x00007FFA97A01000-memory.dmp

Filesize
10.8MB

Download
memory/4472-10-0x00007FFA96F40000-0x00007FFA97A01000-memory.dmp

Filesize
10.8MB

Download

Resubmissions

Analysis

Sharing

Errors

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads