Analysis
- max time kernel
148s - max time network
152s - platform
windows11-ltsc_2024_x64 - resource
win11ltsc2024-20260911-en - resource tags
- submitted
12/11/2026, 12:44
General
- Target krjvrj.jp.net.exe
- Size 3.1MB
- Sample261112-pyjwysfe28
- SHA256 7d9979f6fa7b027f5e497500447e3cf841b924f83f0c30d09dd5c78557feb625
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
krjvrj.jp.net:443
-
www.krjvrj.jp.net:443
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krjvrj.jp.net:80
-
www.krjvrj.jp.net:80
-
248b5668-9246-48c4-88bb-80a7e12010e9
-
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\krjvrj.jp.net.exe"C:\Users\Admin\AppData\Local\Temp\krjvrj.jp.net.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:\Users\Admin\AppData\Roaming\SubDir\Client.exeC:\Users\Admin\AppData\Roaming\SubDir\Client.exe1⤵
- 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 /f2⤵
- Scheduled Task/Job: Scheduled Task
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
memory/2524-34-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-30-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-29-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-28-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-21-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-27-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-26-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-25-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-24-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-23-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/2524-22-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-7-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-0-0x00007FFDC3B0F000-0x00007FFDC3B10000-memory.dmp
memory/4884-14-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-12-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-20-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-11-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-10-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-9-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-8-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-13-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-6-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-5-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-4-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-3-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-2-0x00007FFDC3980000-0x00007FFDC4324000-memory.dmp
memory/4884-1-0x00000000006B0000-0x00000000009D4000-memory.dmp
memory/6048-33-0x000000001D0D0000-0x000000001D182000-memory.dmp
memory/6048-32-0x000000001CFC0000-0x000000001D010000-memory.dmp