Analysis
- max time kernel
142s - max time network
152s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
14/03/2024, 02:26
General
- Target 65ff539e02c7cd85a96be341b2694b52b5258caecdaa603af9f280934c3cdac4.exe
- Size 3.1MB
- Sample240314-cxdmbsaf49
- SHA256 65ff539e02c7cd85a96be341b2694b52b5258caecdaa603af9f280934c3cdac4
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
118.195.235.103:4782
-
71dd960d-f68a-4c48-b005-1abc3acf8e9b
-
encryption_key
87D90725875D825BD5FEC46A2A0B3CE8E2716E58
-
install_name
Windows 任务的主机进程.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Windows 驱动程序基础 - 用户模式驱动程序框架主机进程
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 1 IoCs
- Detects Windows executables referencing non-Windows User-Agents 1 IoCs
- Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs
- Detects executables containing common artifacts observed in infostealers 1 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\65ff539e02c7cd85a96be341b2694b52b5258caecdaa603af9f280934c3cdac4.exe"C:\Users\Admin\AppData\Local\Temp\65ff539e02c7cd85a96be341b2694b52b5258caecdaa603af9f280934c3cdac4.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows 驱动程序基础 - 用户模式驱动程序框架主机进程" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Windows 任务的主机进程.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
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C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=1408 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
memory/3792-0-0x00000000003C0000-0x00000000006E4000-memory.dmp
memory/3792-1-0x00007FFD3F7C0000-0x00007FFD40281000-memory.dmp
memory/3792-2-0x000000001B390000-0x000000001B3A0000-memory.dmp
memory/3792-3-0x000000001D210000-0x000000001D260000-memory.dmp
memory/3792-4-0x000000001D320000-0x000000001D3D2000-memory.dmp
memory/3792-5-0x00007FFD3F7C0000-0x00007FFD40281000-memory.dmp
memory/3792-6-0x000000001B390000-0x000000001B3A0000-memory.dmp