Analysis
- max time kernel
149s - max time network
147s - platform
windows10-2004_x64 - resource
win10v2004-20231222-en - resource tags
- submitted
31/01/2024, 23:25
General
- Target 8555743631267a78de02ae65d5454e3bfc2ac6c5336dab259fcff5316aba840c.exe
- Size 3.1MB
- Sample240131-3ememagdfq
- SHA256 8555743631267a78de02ae65d5454e3bfc2ac6c5336dab259fcff5316aba840c
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
s4.v100.vip:27923
-
d5414082-4cab-4589-99bb-7dd47fd5eb64
-
encryption_key
18854790AF8AC5E8BF1537F60123BF3CEB9A5B09
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 IoCs
- Executes dropped EXE 1 IoCs
- Creates scheduled task(s) 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 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\8555743631267a78de02ae65d5454e3bfc2ac6c5336dab259fcff5316aba840c.exe"C:\Users\Admin\AppData\Local\Temp\8555743631267a78de02ae65d5454e3bfc2ac6c5336dab259fcff5316aba840c.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
Client.exe
memory/1268-8-0x00007FFE7A8D0000-0x00007FFE7B391000-memory.dmp
memory/1268-10-0x000000001BAD0000-0x000000001BAE0000-memory.dmp
memory/1268-11-0x0000000001EF0000-0x0000000001F40000-memory.dmp
memory/1268-12-0x000000001C1A0000-0x000000001C252000-memory.dmp
memory/1268-13-0x00007FFE7A8D0000-0x00007FFE7B391000-memory.dmp
memory/1268-14-0x000000001BAD0000-0x000000001BAE0000-memory.dmp
memory/3016-0-0x0000000000910000-0x0000000000C34000-memory.dmp
memory/3016-1-0x00007FFE7A8D0000-0x00007FFE7B391000-memory.dmp
memory/3016-2-0x000000001B9B0000-0x000000001B9C0000-memory.dmp
memory/3016-9-0x00007FFE7A8D0000-0x00007FFE7B391000-memory.dmp