Analysis
- max time kernel
149s - max time network
150s - platform
windows11-21h2_x64 - resource
win11-20260130-en - resource tags
- submitted
15/04/2026, 03:46
General
- Target pdfvault.exe
- Size 3.5MB
- Sample260415-ebxt7aes4q
- SHA256 6ae587a0dafec2113858c1754706a3f6073cb4d4c4207ca5ac0f1fb359e09515
Malware Config
Extracted
-
quasar
-
1.4.1
-
pdfvault
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afrekqno.za.com:4782
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afrekqno.za.com:443
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c168vip9.online:443
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c168vip9.online:4782
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pdfvault
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encryption_key
2DA8E1B5D18EAA4561218BCAF7CC51C403CE73ED
-
install_name
pdfvault.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
pdfvault
-
subdirectory
pdfvault
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 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\pdfvault.exe"C:\Users\Admin\AppData\Local\Temp\pdfvault.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "pdfvault" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\pdfvault\pdfvault.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Roaming\pdfvault\pdfvault.exe"C:\Users\Admin\AppData\Roaming\pdfvault\pdfvault.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 "pdfvault" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\pdfvault\pdfvault.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
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C:\Users\Admin\AppData\Roaming\pdfvault\pdfvault.exeC:\Users\Admin\AppData\Roaming\pdfvault\pdfvault.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
pdfvault.exe.log
pdfvault.exe
memory/3144-12-0x0000000003230000-0x000000000323C000-memory.dmp
memory/3144-13-0x000000001BD80000-0x000000001BD92000-memory.dmp
memory/4060-14-0x000000001C560000-0x000000001C5B0000-memory.dmp
memory/4060-10-0x000000001BA30000-0x000000001BA40000-memory.dmp
memory/4060-15-0x000000001C670000-0x000000001C722000-memory.dmp
memory/4060-16-0x0000000002DA0000-0x0000000002DAC000-memory.dmp
memory/4060-18-0x000000001BA30000-0x000000001BA40000-memory.dmp
memory/4060-17-0x0000000002E60000-0x0000000002E72000-memory.dmp
memory/4908-7-0x0000000001500000-0x000000000150C000-memory.dmp
memory/4908-8-0x000000001B950000-0x000000001B962000-memory.dmp
memory/4908-1-0x000000001B990000-0x000000001B9A0000-memory.dmp
memory/4908-0-0x0000000000960000-0x0000000000CDE000-memory.dmp