Analysis
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max time kernel
149s -
max time network
141s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
16-11-2024 20:20
General
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Target
Client-built.exe
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Size
3.1MB
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MD5
9ff508735b3785e3697ad97896820845
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SHA1
01c2d68abbac2caefc163d389f43ec53798952cb
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SHA256
6470715a18148c46c345978216785766d8fa1548d3378dda685146d6e5cd6c7f
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SHA512
cf9ae7a63f1988c614d75b71da7244d3ea046120868dec2f6d85debd1d454a55531294da3cd02fb7e2fb02cca7f4457f819c06f9600dcc9940b11f45ea5c427b
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SSDEEP
49152:2vht62XlaSFNWPjljiFa2RoUYITrgCjhdGoGddTHHB72eh2NT:2vL62XlaSFNWPjljiFXRoUYITrgP
Malware Config
Extracted
quasar
1.4.1
Office04
192.168.1.82:4782
3783d7ca-3a06-404f-a250-4e9a22f8ac32
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encryption_key
47D9E81F01D52C405867EC357C00214579A008BB
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install_name
sysupdate32.exe
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log_directory
Logs
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reconnect_delay
3000
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startup_key
sysupdate32
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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 1 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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Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 12 IoCs
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Suspicious use of AdjustPrivilegeToken 7 IoCs
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Suspicious use of FindShellTrayWindow 39 IoCs
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Suspicious use of SendNotifyMessage 39 IoCs
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Suspicious use of WriteProcessMemory 6 IoCs
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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\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:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "sysupdate32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\sysupdate32.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Roaming\SubDir\sysupdate32.exe"C:\Users\Admin\AppData\Roaming\SubDir\sysupdate32.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "sysupdate32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\sysupdate32.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /71⤵
- 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⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
3.1MB
MD59ff508735b3785e3697ad97896820845
SHA101c2d68abbac2caefc163d389f43ec53798952cb
SHA2566470715a18148c46c345978216785766d8fa1548d3378dda685146d6e5cd6c7f
SHA512cf9ae7a63f1988c614d75b71da7244d3ea046120868dec2f6d85debd1d454a55531294da3cd02fb7e2fb02cca7f4457f819c06f9600dcc9940b11f45ea5c427b
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Filesize
10.8MB
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Filesize
10.8MB
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Filesize
320KB
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Filesize
712KB
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Filesize
10.8MB
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Filesize
8KB
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Filesize
3.1MB
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Filesize
10.8MB
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Filesize
10.8MB
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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