Analysis
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max time kernel
149s -
max time network
152s -
platform
windows7_x64 -
resource
win7-20240215-en -
resource tags
arch:x64arch:x86image:win7-20240215-enlocale:en-usos:windows7-x64system -
submitted
04-06-2024 19:23
Behavioral task
behavioral1
Sample
Internal.exe
Resource
win7-20240215-en
General
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Target
Internal.exe
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Size
3.1MB
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MD5
be5b55bb6d4f8664c9bf666d6c0a7091
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SHA1
61d5d4e5ef19f45534b0cee932bf6c221a4d894e
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SHA256
34488fe08fe3d2e51142541f8ef6ac0f912ffd5d2ea5ea35cd93c0be7a76e66e
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SHA512
55e1ade5ae25cc8a6ba4b78ea67f1f707a805efe30299876182a957cbc69db3e5e817d435f94b437a93ef2395b17dcd879754b4e22ebaa0e7c94771735763122
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SSDEEP
49152:LvEuf2NUaNmwzPWlvdaKM7ZxTwqSeEErHIk/uVWoGdRcTHHB72eh2NT:Lvzf2NUaNmwzPWlvdaB7ZxTwqSeSE
Malware Config
Extracted
quasar
1.4.1
svchost
192.168.0.120:4782
9fde5542-6125-4272-a814-17dab286fa9f
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encryption_key
7D71500E67A8C0039FEB5CC2A22FA4DAC65EF711
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install_name
svchost.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
svchost
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subdirectory
SubDir
Signatures
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Quasar payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/2108-1-0x0000000000080000-0x00000000003A4000-memory.dmp family_quasar C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe family_quasar behavioral1/memory/2904-8-0x00000000008D0000-0x0000000000BF4000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
Processes:
svchost.exepid process 2904 svchost.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 320 schtasks.exe 2372 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Internal.exesvchost.exedescription pid process Token: SeDebugPrivilege 2108 Internal.exe Token: SeDebugPrivilege 2904 svchost.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
svchost.exepid process 2904 svchost.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
svchost.exepid process 2904 svchost.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
svchost.exepid process 2904 svchost.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
Internal.exesvchost.exedescription pid process target process PID 2108 wrote to memory of 320 2108 Internal.exe schtasks.exe PID 2108 wrote to memory of 320 2108 Internal.exe schtasks.exe PID 2108 wrote to memory of 320 2108 Internal.exe schtasks.exe PID 2108 wrote to memory of 2904 2108 Internal.exe svchost.exe PID 2108 wrote to memory of 2904 2108 Internal.exe svchost.exe PID 2108 wrote to memory of 2904 2108 Internal.exe svchost.exe PID 2904 wrote to memory of 2372 2904 svchost.exe schtasks.exe PID 2904 wrote to memory of 2372 2904 svchost.exe schtasks.exe PID 2904 wrote to memory of 2372 2904 svchost.exe schtasks.exe -
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\Internal.exe"C:\Users\Admin\AppData\Local\Temp\Internal.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\schtasks.exe"schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe"C:\Users\Admin\AppData\Roaming\SubDir\svchost.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 "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\svchost.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
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Downloads
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C:\Users\Admin\AppData\Roaming\SubDir\svchost.exeFilesize
3.1MB
MD5be5b55bb6d4f8664c9bf666d6c0a7091
SHA161d5d4e5ef19f45534b0cee932bf6c221a4d894e
SHA25634488fe08fe3d2e51142541f8ef6ac0f912ffd5d2ea5ea35cd93c0be7a76e66e
SHA51255e1ade5ae25cc8a6ba4b78ea67f1f707a805efe30299876182a957cbc69db3e5e817d435f94b437a93ef2395b17dcd879754b4e22ebaa0e7c94771735763122
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memory/2108-0-0x000007FEF5B73000-0x000007FEF5B74000-memory.dmpFilesize
4KB
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memory/2108-1-0x0000000000080000-0x00000000003A4000-memory.dmpFilesize
3.1MB
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memory/2108-2-0x000007FEF5B70000-0x000007FEF655C000-memory.dmpFilesize
9.9MB
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memory/2108-9-0x000007FEF5B70000-0x000007FEF655C000-memory.dmpFilesize
9.9MB
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memory/2904-11-0x000007FEF5B70000-0x000007FEF655C000-memory.dmpFilesize
9.9MB
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memory/2904-10-0x000007FEF5B70000-0x000007FEF655C000-memory.dmpFilesize
9.9MB
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memory/2904-8-0x00000000008D0000-0x0000000000BF4000-memory.dmpFilesize
3.1MB
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memory/2904-12-0x000007FEF5B70000-0x000007FEF655C000-memory.dmpFilesize
9.9MB