Analysis
- max time kernel
131s - max time network
198s - platform
windows10-2004_x64 - resource
win10v2004-20231020-en - resource tags
- submitted
22/10/2023, 17:14
General
- Target NEAS.1b5d94d555da4d3622c04daa76005670.exe
- Size 3.2MB
- Sample231022-vsblaadf39
- SHA256 e8b4e8fa5772f5844e7ed7bc517a4ef8ff1e834f2016001b46c133eae7c1e4fd
Malware Config
Extracted
-
quasar
-
1.4.1
-
miebo
-
tsxrkj.synology.me:4782
-
dng05vpn.v4.softether.net:14782
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dng.dns05.com:14782
-
douzi.my-wan.de:14782
-
915f5b0f-6a34-4991-ab2a-f46332725843
-
encryption_key
13D07E1CDCAA10C665FE06D1A1007537298BA6B3
-
install_name
explorer.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
explorer
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 1 IoCs
- Drops file in System32 directory 2 IoCs
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 2 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\NEAS.1b5d94d555da4d3622c04daa76005670.exe"C:\Users\Admin\AppData\Local\Temp\NEAS.1b5d94d555da4d3622c04daa76005670.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\explorer\explorer.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
memory/4132-0-0x0000000000BF0000-0x0000000000F2C000-memory.dmp
memory/4132-1-0x00007FF8254F0000-0x00007FF825FB1000-memory.dmp
memory/4132-2-0x0000000002FF0000-0x0000000003000000-memory.dmp
memory/4132-3-0x00007FF8254F0000-0x00007FF825FB1000-memory.dmp
memory/4132-4-0x0000000002FF0000-0x0000000003000000-memory.dmp