Analysis
- max time kernel
146s - max time network
158s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
30/05/2024, 01:55
General
- Target 392a6ea0718747e4ad443f730047715b.exe
- Size 3.1MB
- Sample240530-cb7chsbd22
- SHA256 36be936ba0fc160a314bfaf9be4c8689730ad9c11c3cf6fb7d066c43a934b257
Malware Config
Extracted
-
quasar
-
1.4.1
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EmmasSub
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85.23.24.170:4782
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85.23.109.34:4782
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82.128.254.93:4782
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f82c7021-f558-4f6f-bbb3-fbe420c708e5
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encryption_key
4DC093FC202D016F95DCEE92AAF2874F56ACC3F2
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install_name
RuntimeBroker.exe
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log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Windows Update
-
subdirectory
WindowsSecureManager
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
- 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
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C:\Users\Admin\AppData\Local\Temp\392a6ea0718747e4ad443f730047715b.exe"C:\Users\Admin\AppData\Local\Temp\392a6ea0718747e4ad443f730047715b.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Windows\system32\WindowsSecureManager\RuntimeBroker.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
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C:\Windows\system32\WindowsSecureManager\RuntimeBroker.exe"C:\Windows\system32\WindowsSecureManager\RuntimeBroker.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Windows\system32\WindowsSecureManager\RuntimeBroker.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=4416 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:81⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
RuntimeBroker.exe
memory/2332-0-0x00007FFA36593000-0x00007FFA36595000-memory.dmp
memory/2332-1-0x00000000009E0000-0x0000000000D04000-memory.dmp
memory/2332-2-0x00007FFA36590000-0x00007FFA37051000-memory.dmp
memory/2332-9-0x00007FFA36590000-0x00007FFA37051000-memory.dmp
memory/3296-10-0x00007FFA36590000-0x00007FFA37051000-memory.dmp
memory/3296-11-0x000000001C950000-0x000000001C9A0000-memory.dmp
memory/3296-12-0x000000001CA60000-0x000000001CB12000-memory.dmp
memory/3296-13-0x00007FFA36590000-0x00007FFA37051000-memory.dmp