Analysis
- user interaction
yes - max time kernel
149s - max time network
146s - platform
windows10-ltsc_2021_x64 - resource
win10ltsc2021-20260513-en - resource tags
- submitted
17/05/2026, 17:07
General
- Target Pulsar-Client.exe
- Size 1.1MB
- Sample260517-vm2khsbt5w
- SHA256 2c4daf0754961b279e57a771f2e3263f1f0c6045bde1a690668270cdb1c097a7
Malware Config
Extracted
-
quasar
-
encryption_key
D14992C2A25D72335E07FEA2853E73F5707CC71F
-
key_salt
5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382
-
reconnect_delay
3000
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 behavior: AddClipboardFormatListener 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 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
-
C:\Users\Admin\AppData\Local\Temp\Pulsar-Client.exe"C:\Users\Admin\AppData\Local\Temp\Pulsar-Client.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Excst" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Exc.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Exc.exe"C:\Users\Admin\AppData\Roaming\SubDir\Exc.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Excst" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Exc.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Exc.exeC:\Users\Admin\AppData\Roaming\SubDir\Exc.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
Loading Replay Monitor...
Downloads
Exc.exe
memory/1472-0-0x00000111786E0000-0x000001117880A000-memory.dmp
memory/1472-1-0x000001117A390000-0x000001117A3A0000-memory.dmp
memory/1472-2-0x000001117A3B0000-0x000001117A3E4000-memory.dmp
memory/2960-7-0x0000022A34D90000-0x0000022A34DC4000-memory.dmp
memory/4768-5-0x0000023727CF0000-0x0000023727D00000-memory.dmp
memory/4768-9-0x0000023727CF0000-0x0000023727D00000-memory.dmp
memory/4768-10-0x0000023729130000-0x0000023729168000-memory.dmp