Analysis
- max time kernel
125s - max time network
142s - platform
windows10-2004_x64 - resource
win10v2004-20240226-en - resource tags
- submitted
31/03/2024, 01:46
General
- Target 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe
- Size 3.1MB
- Sample240331-b66h2acb42
- SHA256 4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a
Malware Config
Extracted
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quasar
-
1.4.1
-
1st
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94.156.8.44:4787
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94.156.8.44:6606
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8c89b218-c255-48cb-be3d-4ac14fe780fa
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encryption_key
4785083178D87EB2AD342D8849D0672AE29F1744
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install_name
softgui.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
softgui.svc
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 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\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe"C:\Users\Admin\AppData\Local\Temp\4b49068a198e8dcc90d1ae5d623c2cf669c93e067573b26c880b56b14e550e3a.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "softgui.svc" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe"C:\Users\Admin\AppData\Roaming\SubDir\softgui.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 "softgui.svc" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\softgui.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
softgui.exe
memory/1492-9-0x00007FFCCDD40000-0x00007FFCCE801000-memory.dmp
memory/1492-11-0x000000001B050000-0x000000001B060000-memory.dmp
memory/1492-12-0x000000001BC70000-0x000000001BCC0000-memory.dmp
memory/1492-13-0x000000001BD80000-0x000000001BE32000-memory.dmp
memory/1492-14-0x00007FFCCDD40000-0x00007FFCCE801000-memory.dmp
memory/1492-15-0x000000001B050000-0x000000001B060000-memory.dmp
memory/5660-0-0x00000000002D0000-0x00000000005F4000-memory.dmp
memory/5660-1-0x00007FFCCDD40000-0x00007FFCCE801000-memory.dmp
memory/5660-2-0x000000001B650000-0x000000001B660000-memory.dmp
memory/5660-10-0x00007FFCCDD40000-0x00007FFCCE801000-memory.dmp