Analysis
- max time kernel
149s - max time network
152s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
04/08/2026, 02:00
General
- Target yolly.io.exe
- Size 3.1MB
- Sample260804-ce1zxabb99
- SHA256 78c272690130b6aca35dff71e88600ff42c6cef1176a977e68b62a5850393bd9
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
yolly.io:443
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www.yolly.io:443
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yolly.io:80
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www.yolly.io:80
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e7e6b9ce-57f9-4b92-bcf0-8a40ffd044a9
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encryption_key
ED3227F773701D05083B11A65776F95F93EEEF5E
-
install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
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
- 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 2 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
-
C:\Users\Admin\AppData\Local\Temp\yolly.io.exe"C:\Users\Admin\AppData\Local\Temp\yolly.io.exe"1⤵
- 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 /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
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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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
Loading Replay Monitor...
Downloads
Client.exe
memory/908-25-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-24-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-32-0x000000001D6B0000-0x000000001D700000-memory.dmp
memory/908-30-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-29-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-28-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-27-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-18-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-33-0x000000001D7C0000-0x000000001D872000-memory.dmp
memory/908-23-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-26-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-22-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-21-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-19-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-34-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-20-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/908-17-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-8-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-16-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-14-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-13-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-12-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-11-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-10-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-9-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-0-0x00007FFE2A8EF000-0x00007FFE2A8F0000-memory.dmp
memory/4816-7-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-6-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-5-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-4-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-3-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-2-0x00007FFE2A760000-0x00007FFE2B104000-memory.dmp
memory/4816-1-0x0000000000630000-0x0000000000954000-memory.dmp