Analysis
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max time kernel
148s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
07-11-2024 23:52
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
caf5dead17145386269ae8b5d3003443
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SHA1
f8391c3484f228f7ec2dfa4058aef05e26e4b54e
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SHA256
4950eae245a264978ae47609ceab1373a6ae422dcb1b394e6760c4a2c55ef64b
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SHA512
cbbb580d7ea9dc372c541b8768f8975f9b5c971eeecd98830f74b905c9abfd90552bedb2e11f3b3068233989a1717dac4a87c5291c957a58458b35d3643bde4b
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SSDEEP
49152:mvEt62XlaSFNWPjljiFa2RoUYIkCH1JMLoGdjTHHB72eh2NT:mvY62XlaSFNWPjljiFXRoUYIkCK
Malware Config
Extracted
quasar
1.4.1
Office04
10.0.2.15:4782
a9c99f43-f3a5-48e9-8571-13fe9681f6a3
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encryption_key
A925763DFC4341C00AED353212B5C1AE07840A6A
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install_name
Client.exe
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log_directory
Logs
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reconnect_delay
1000
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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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Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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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 16 IoCs
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Suspicious use of AdjustPrivilegeToken 8 IoCs
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Suspicious use of FindShellTrayWindow 41 IoCs
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Suspicious use of SendNotifyMessage 41 IoCs
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Suspicious use of SetWindowsHookEx 1 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
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
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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
MD5caf5dead17145386269ae8b5d3003443
SHA1f8391c3484f228f7ec2dfa4058aef05e26e4b54e
SHA2564950eae245a264978ae47609ceab1373a6ae422dcb1b394e6760c4a2c55ef64b
SHA512cbbb580d7ea9dc372c541b8768f8975f9b5c971eeecd98830f74b905c9abfd90552bedb2e11f3b3068233989a1717dac4a87c5291c957a58458b35d3643bde4b
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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
712KB
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Filesize
320KB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
3.1MB
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Filesize
10.8MB
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Filesize
8KB
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Filesize
10.8MB