Analysis
- max time kernel
149s - max time network
157s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
24/03/2024, 04:11
General
- Target ea32f97d7eeda853378cc05a5d4f79c5.exe
- Size 3.1MB
- Sample240324-esb9tahe89
- SHA256 76cccbc2612c06f2e367bc0a8f53c173ed9d9db078603018e879e46510f5d4d2
Malware Config
Extracted
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quasar
-
1.4.1
-
Office04
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xcoderreal-20015.portmap.host:4782
-
7cdfecd4-9eea-47bd-9b07-1e1993a73faf
-
encryption_key
8B5D3A99FA77DE061652B0F00AE61CD23BB12B7C
-
install_name
Client.exe
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log_directory
Logs
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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
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- 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 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\ea32f97d7eeda853378cc05a5d4f79c5.exe"C:\Users\Admin\AppData\Local\Temp\ea32f97d7eeda853378cc05a5d4f79c5.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)
-
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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 FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- 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 /f3⤵
- Creates scheduled task(s)
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-
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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=2232 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
Client.exe
Client.exe
memory/3984-9-0x00007FF9840E0000-0x00007FF984BA1000-memory.dmp
memory/3984-11-0x000000001B310000-0x000000001B320000-memory.dmp
memory/3984-12-0x000000001C370000-0x000000001C3C0000-memory.dmp
memory/3984-13-0x000000001C480000-0x000000001C532000-memory.dmp
memory/3984-14-0x00007FF9840E0000-0x00007FF984BA1000-memory.dmp
memory/3984-15-0x000000001B310000-0x000000001B320000-memory.dmp
memory/4072-0-0x0000000000830000-0x0000000000B54000-memory.dmp
memory/4072-1-0x00007FF9840E0000-0x00007FF984BA1000-memory.dmp
memory/4072-2-0x000000001B780000-0x000000001B790000-memory.dmp
memory/4072-10-0x00007FF9840E0000-0x00007FF984BA1000-memory.dmp