Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
14/12/2024, 14:14
General
- Target fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe
- Size 502KB
- Sample241214-rkc8csvkav
- SHA256 fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee
Malware Config
Extracted
-
quasar
-
1.4.0
-
Office04
-
69.160.242.105:4782
-
69.160.242.105:11066
-
66661e0f-33c3-4f2f-88be-1634de535cd1
-
encryption_key
CBED6820557E8011D93BA51D49F569DE8C1F98B4
-
install_name
Client.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
java updater
-
subdirectory
SubDir
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 System32 directory 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 6 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\fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe"C:\Users\Admin\AppData\Local\Temp\fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "java updater" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\fdba9e9d51c62d59de744a179a50ce9f5838af549f30f5b87c8175dace024fee.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
C:\Windows\system32\SubDir\Client.exe"C:\Windows\system32\SubDir\Client.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 "java updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
memory/4052-0-0x00007FFD0BD53000-0x00007FFD0BD55000-memory.dmp
memory/4052-1-0x0000000000F80000-0x0000000001004000-memory.dmp
memory/4052-2-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp
memory/4052-9-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp
memory/4448-8-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp
memory/4448-10-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp
memory/4448-11-0x000000001BA40000-0x000000001BA90000-memory.dmp
memory/4448-12-0x000000001BB50000-0x000000001BC02000-memory.dmp
memory/4448-13-0x00007FFD0BD50000-0x00007FFD0C811000-memory.dmp