Analysis
- max time kernel
149s - max time network
150s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
24/09/2026, 05:39
General
- Target xoso6684.exe
- Size 3.1MB
- Sample260924-gcsb7sfb59
- SHA256 675ed87f40bb7a5eedfa4442c78425078ad8341d46cc495ad09d7bd947311a8b
Malware Config
Extracted
-
quasar
-
1.4.1
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Office04
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xoso6684.com:443
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www.xoso6684.com:443
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xoso6684.com:80
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www.xoso6684.com:80
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2b56dee6-f935-4150-b8e4-f864daf4b40c
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encryption_key
ED3227F773701D05083B11A65776F95F93EEEF5E
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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
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\xoso6684.exe"C:\Users\Admin\AppData\Local\Temp\xoso6684.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
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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 /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
Loading Replay Monitor...
Downloads
Client.exe
memory/3168-24-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/3168-23-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/3168-22-0x000000001CB60000-0x000000001CC12000-memory.dmp
memory/3168-21-0x000000001CA50000-0x000000001CAA0000-memory.dmp
memory/3168-19-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/3168-17-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/3168-16-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-12-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-8-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-10-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-11-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-0-0x00007FFBFB98F000-0x00007FFBFB990000-memory.dmp
memory/4548-13-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-14-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-9-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-7-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-6-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-18-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-5-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-4-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-3-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-2-0x00007FFBFB800000-0x00007FFBFC1A4000-memory.dmp
memory/4548-1-0x0000000000B10000-0x0000000000E34000-memory.dmp