Analysis
- max time kernel
59s - max time network
61s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260911-en - resource tags
- submitted
11/11/2026, 05:45
General
- Target ko66.exe
- Size 3.1MB
- Sample261111-gf4jmseh53
- SHA256 bd1f93698611d6666a961bd2f69f3d40953adcfb38bc8697c9c90a65c18ea46c
Malware Config
Extracted
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quasar
-
1.4.1
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OK365 Client
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ko66.asia:443
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ko66.asia:80
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www.ko66.asia:443
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www.ko66.asia:80
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3cb6f7ce-f521-4677-b078-01e1d892b28d
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encryption_key
71514463CA895B84E7E6B4A4FC68A8243476E095
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install_name
Client.exe
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key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
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log_directory
Logs
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reconnect_delay
100
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startup_key
dkmm
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Reads the TCP/IP host and domain name from the registry 1 TTPs 2 IoCs
The configured hostname and DNS domain identify the machine and are commonly collected to profile a host before it reports in.
- 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 SetWindowsHookEx 1 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\ko66.exe"C:\Users\Admin\AppData\Local\Temp\ko66.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "dkmm" /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
- Reads the TCP/IP host and domain name from the registry
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "dkmm" /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/1944-0-0x0000000000230000-0x0000000000554000-memory.dmp
memory/1944-1-0x0000000002710000-0x0000000002720000-memory.dmp
memory/3484-8-0x00000000017C0000-0x00000000017D0000-memory.dmp
memory/3484-10-0x000000001BA80000-0x000000001BAD0000-memory.dmp
memory/3484-11-0x000000001CDB0000-0x000000001CE62000-memory.dmp
memory/3484-13-0x00000000017C0000-0x00000000017D0000-memory.dmp