Analysis
- max time kernel
149s - max time network
151s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
26/03/2026, 09:26
General
- Target Client-built.exe
- Size 3.5MB
- Sample260326-ld9ebscs9p
- SHA256 16a90c5c7652156f13f393f04d48d583f71be9df4785c0d7951c320b187db81d
Malware Config
Extracted
-
quasar
-
1.4.1
-
emodplus
-
magento.cn.com:4782
-
journal-world.za.com:4782
-
eModPlus
-
encryption_key
2DA8E1B5D18EAA4561218BCAF7CC51C403CE73ED
-
install_name
msi.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
msi
-
subdirectory
msi
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in Program Files directory 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 2 IoCs
- Suspicious use of FindShellTrayWindow 1 IoCs
- Suspicious use of SendNotifyMessage 1 IoCs
- Suspicious use of SetWindowsHookEx 1 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\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Drops file in Program Files directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "msi" /sc ONLOGON /tr "C:\Program Files\msi\msi.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Program Files\msi\msi.exe"C:\Program Files\msi\msi.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "msi" /sc ONLOGON /tr "C:\Program Files\msi\msi.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
msi.exe
memory/4312-0-0x0000000000620000-0x000000000099E000-memory.dmp
memory/4312-1-0x000000001B6B0000-0x000000001B6C0000-memory.dmp
memory/4312-8-0x0000000002AF0000-0x0000000002B02000-memory.dmp
memory/4312-7-0x0000000002A70000-0x0000000002A7C000-memory.dmp
memory/4428-9-0x000000001B8D0000-0x000000001B8E0000-memory.dmp
memory/4428-10-0x000000001C3D0000-0x000000001C420000-memory.dmp
memory/4428-11-0x000000001C4E0000-0x000000001C592000-memory.dmp
memory/4428-12-0x0000000002D90000-0x0000000002D9C000-memory.dmp
memory/4428-14-0x000000001B8D0000-0x000000001B8E0000-memory.dmp
memory/4428-13-0x0000000002E10000-0x0000000002E22000-memory.dmp