Analysis
- max time kernel
150s - max time network
152s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260709-en - resource tags
- submitted
30/07/2026, 21:57
General
- Target Client-built.exe
- Size 3.1MB
- Sample260730-1vbxqagc24
- SHA256 258f70fef4530c628d96339e047e20023d6ac21edee0af8ec2fc27a03d9583e1
Malware Config
Extracted
-
quasar
-
1.4.1
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Office04
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91.92.43.103:8443
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45f9ccab-a7f1-46af-9976-1fc0c8f4c7cc
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encryption_key
D5FCF17DF5F2C72D6A950476FB7D1F8BFF330E3D
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install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
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log_directory
Logs
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reconnect_delay
3000
-
startup_key
strtp
-
subdirectory
SubDir
Signatures
- Family: Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 2 IoCs
- Drops file in System32 directory 3 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
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C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "strtp" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\SubDir\Client.exe"C:\Windows\system32\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "strtp" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
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-
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C:\Windows\system32\SubDir\Client.exeC:\Windows\system32\SubDir\Client.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\svchost.exeC:\Windows\system32\svchost.exe -k GPSvcGroup1⤵
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/2012-25-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-28-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-35-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-34-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-33-0x000000001CC30000-0x000000001CCE2000-memory.dmp
memory/2012-32-0x000000001CB20000-0x000000001CB70000-memory.dmp
memory/2012-31-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-30-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-27-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-29-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-19-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-26-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-24-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-23-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-21-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-16-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-20-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/2012-18-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-10-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-17-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-1-0x0000000000BE0000-0x0000000000F04000-memory.dmp
memory/4984-14-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-12-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-0-0x00007FFD5EB3F000-0x00007FFD5EB40000-memory.dmp
memory/4984-2-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-13-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-9-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-11-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-8-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-6-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-7-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-5-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-4-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp
memory/4984-3-0x00007FFD5E9B0000-0x00007FFD5F354000-memory.dmp