Analysis
- max time kernel
149s - max time network
150s - platform
windows10-2004_x64 - resource
win10v2004-20241007-en - resource tags
- submitted
11/10/2024, 17:11
General
- Target Client-built4.exe
- Size 3.1MB
- Sample241011-vqak7stdkc
- SHA256 c78371ce6ad6b68c1ef504026ebbd1bde07866c0ebecda7a8d459b83db3e1303
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
misterzeee-21127.portmap.host:4782
-
c6524c93-499e-4361-8743-d4e8717b52c1
-
encryption_key
CE5FBAC1A56C8C780C74FE8E7CD5CBCF8ABD6C8D
-
install_name
Client.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Drops file in System32 directory 5 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
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C:\Users\Admin\AppData\Local\Temp\Client-built4.exe"C:\Users\Admin\AppData\Local\Temp\Client-built4.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.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
- Drops file in System32 directory
- 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 "Startup" /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/2268-10-0x00007FF8E41C0000-0x00007FF8E4C81000-memory.dmp
memory/2268-11-0x00007FF8E41C0000-0x00007FF8E4C81000-memory.dmp
memory/2268-12-0x000000001C010000-0x000000001C060000-memory.dmp
memory/2268-13-0x000000001C120000-0x000000001C1D2000-memory.dmp
memory/2268-14-0x00007FF8E41C0000-0x00007FF8E4C81000-memory.dmp
memory/4648-0-0x00007FF8E41C3000-0x00007FF8E41C5000-memory.dmp
memory/4648-1-0x0000000000260000-0x0000000000584000-memory.dmp
memory/4648-2-0x00007FF8E41C0000-0x00007FF8E4C81000-memory.dmp
memory/4648-9-0x00007FF8E41C0000-0x00007FF8E4C81000-memory.dmp