Analysis
- max time kernel
148s - max time network
153s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260617-en - resource tags
- submitted
22/06/2026, 06:39
General
- Target b2bplus.nl.exe
- Size 3.1MB
- Sample260622-heve1sav4y
- SHA256 fed1cef391c3a36f8baeef90acee6cf33e81122049a644cc4e44b08bd50711ef
Malware Config
Extracted
-
quasar
-
1.4.1
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Office04
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b2bplus.nl:53
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b2bplus.nl:80
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b2bplus.nl:25
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b2bplus.nl:22
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b2bplus.nl:21
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b2bplus.nl:8090
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b2bplus.nl:7080
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b2bplus.nl:443
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b2bplus.nl:2525
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b2bplus.nl:143
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b2bplus.nl:993
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b2bplus.nl:465
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b2bplus.nl:587
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www.b2bplus.nl:25
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www.b2bplus.nl:80
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www.b2bplus.nl:443
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www.b2bplus.nl:8090
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www.b2bplus.nl:7080
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www.b2bplus.nl:2525
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www.b2bplus.nl:465
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f9cda715-4cd6-4eb4-b3ff-d38953ca6636
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encryption_key
1F31CD0582BA6FBDA903BF4F947CCB13B60528E3
-
install_name
Client.exe
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key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
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log_directory
Logs
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reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Unexpected DNS network traffic destination 1 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
- 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.
Processes
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C:\Users\Admin\AppData\Local\Temp\b2bplus.nl.exe"C:\Users\Admin\AppData\Local\Temp\b2bplus.nl.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
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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
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
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-
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C:\Users\Admin\AppData\Roaming\SubDir\Client.exeC:\Users\Admin\AppData\Roaming\SubDir\Client.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
Client.exe
memory/5100-25-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-26-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-34-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-33-0x000000001C910000-0x000000001C9C2000-memory.dmp
memory/5100-32-0x000000001C800000-0x000000001C850000-memory.dmp
memory/5100-30-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-29-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-28-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-27-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-20-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-21-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-24-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-23-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-22-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-17-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-16-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5100-18-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-9-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-11-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-19-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-14-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-13-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-12-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-1-0x0000000000DB0000-0x00000000010D4000-memory.dmp
memory/5652-0-0x00007FFA4B77F000-0x00007FFA4B780000-memory.dmp
memory/5652-10-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-2-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-8-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-7-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-6-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-5-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-4-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp
memory/5652-3-0x00007FFA4B5F0000-0x00007FFA4BF94000-memory.dmp