Analysis
- user interaction
yes - max time kernel
14s - max time network
10s - platform
windows10-2004_x64 - resource
win10v2004-20260513-en - resource tags
- submitted
31/07/2026, 12:11
General
- Target Pulsar-Client.exe
- Size 1.2MB
- Sample260731-pc33psab88
- SHA256 01ca12dc50b30bdfc6ce523c1ad4ae477d83a6e465a44e0153ab3980dabb19b3
Malware Config
Extracted
-
quasar
-
encryption_key
33A7029011B6BD4B067B8907EB238F25EFF233BF
-
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 1 IoCs
- Drops file in System32 directory 2 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 20 IoCs
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 1 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⤵
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "SystemHelper" /sc ONLOGON /tr "C:\Windows\system32\SubDir\SystemHelper.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\SubDir\SystemHelper.exeC:\Windows\system32\SubDir\SystemHelper.exe1⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
SystemHelper.exe
memory/2900-0-0x00000195B59F0000-0x00000195B5B26000-memory.dmp
memory/2900-1-0x00000195D0220000-0x00000195D0230000-memory.dmp
memory/2900-2-0x00000195B5FA0000-0x00000195B5FD4000-memory.dmp
memory/2900-5-0x00000195B7930000-0x00000195B7931000-memory.dmp
memory/2900-4-0x00000195B7940000-0x00000195B7941000-memory.dmp
memory/5596-8-0x000002C6BD5F0000-0x000002C6BD600000-memory.dmp
memory/5596-9-0x000002C6BD5C0000-0x000002C6BD5F4000-memory.dmp
memory/5596-11-0x000002C6D5DC0000-0x000002C6D5DD0000-memory.dmp
memory/5596-10-0x000002C6D5DB0000-0x000002C6D5DC0000-memory.dmp