Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-ltsc 2021_x64 -
resource
win10ltsc2021-20241023-en -
resource tags
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submitted
26-10-2024 23:27
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
f376797b0fee565e345961746ce5d488
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SHA1
e411ca3cedf4390229637f7dc5b2f9098f289c31
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SHA256
ec7ebcd2b6c9289969840948cb7f523d3b67cad6cae1955b7e9ef059b0218dc0
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SHA512
e3323855730d474343249738a5d2e74df819f6dc02f553b3c769e988a8b5d9f607031921cb5f98cfd696474fec6590d6daac65d1caa14a1da50c564e23737f60
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SSDEEP
49152:XvzlL26AaNeWgPhlmVqvMQ7XSKoSRJ6fbR3LoGdATHHB72eh2NT:XvpL26AaNeWgPhlmVqkQ7XSKoSRJ6x
Malware Config
Extracted
quasar
1.4.1
Office04
Index1337z-43991.portmap.host:43991
0078aebf-454a-4862-8d16-b94bd8465d38
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encryption_key
3833C35AA932103E67A3C2ED814028BCDAEA8E15
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
Quasar Client Startup
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subdirectory
SubDir
Signatures
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Quasar RAT
Quasar is an open source Remote Access Tool.
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Quasar family
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Quasar payload 2 IoCs
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Executes dropped EXE 2 IoCs
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Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
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Modifies registry class 1 IoCs
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Suspicious behavior: EnumeratesProcesses 20 IoCs
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Suspicious use of AdjustPrivilegeToken 8 IoCs
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Suspicious use of FindShellTrayWindow 44 IoCs
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Suspicious use of SendNotifyMessage 44 IoCs
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Suspicious use of WriteProcessMemory 2 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\Client-built.exe"C:\Users\Admin\AppData\Local\Temp\Client-built.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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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
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
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C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
3.1MB
MD5f376797b0fee565e345961746ce5d488
SHA1e411ca3cedf4390229637f7dc5b2f9098f289c31
SHA256ec7ebcd2b6c9289969840948cb7f523d3b67cad6cae1955b7e9ef059b0218dc0
SHA512e3323855730d474343249738a5d2e74df819f6dc02f553b3c769e988a8b5d9f607031921cb5f98cfd696474fec6590d6daac65d1caa14a1da50c564e23737f60
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
712KB
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Filesize
10.8MB
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Filesize
320KB
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Filesize
4KB
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Filesize
4KB
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Filesize
4KB
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Filesize
4KB
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Filesize
4KB
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Filesize
4KB
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Filesize
4KB
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Filesize
4KB
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Filesize
4KB
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Filesize
4KB
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Filesize
8KB
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Filesize
10.8MB
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Filesize
3.1MB
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Filesize
10.8MB