Analysis
- max time kernel
237s - max time network
236s - platform
windows11-21h2_x64 - resource
win11-20240426-en - resource tags
- submitted
29/05/2024, 03:57
General
- Target Client-built.exe
- Size 3.1MB
- Sample240529-eh157aae65
- SHA256 9b906e8b6e09cdb3ad9d100dcb77df6f30e0a88c1fb164ea491a9e6fdd823083
Malware Config
Extracted
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quasar
-
1.4.1
-
Office04
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10.0.0.5:55976
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127.0.0.1:12995
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fd7766f9-01b8-4f7d-9510-71226643b102
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encryption_key
1A0BB6F7E6C51A39D122080A266E59E4C6D10FA8
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install_name
Centixwareinstaller.exe
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log_directory
Logs
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reconnect_delay
3000
-
startup_key
Windows 11 Dir
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Gathers network information 2 TTPs 1 IoCs
Uses commandline utility to view network configuration.
- Suspicious behavior: GetForegroundWindowSpam 1 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 8 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\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 "Windows 11 Dir" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Centixwareinstaller.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\SubDir\Centixwareinstaller.exe"C:\Users\Admin\AppData\Roaming\SubDir\Centixwareinstaller.exe"2⤵
- Executes dropped EXE
- Suspicious behavior: GetForegroundWindowSpam
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Windows 11 Dir" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Centixwareinstaller.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
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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:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe"1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\NETSTAT.EXEnetstat -a2⤵
- Gathers network information
- Suspicious use of AdjustPrivilegeToken
-
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C:\Windows\system32\cmd.exe"C:\Windows\system32\cmd.exe"1⤵
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Centixwareinstaller.exe
memory/3968-1-0x00007FF8A2DD3000-0x00007FF8A2DD5000-memory.dmp
memory/3968-0-0x0000000000040000-0x0000000000364000-memory.dmp
memory/3968-2-0x00007FF8A2DD0000-0x00007FF8A3892000-memory.dmp
memory/3968-9-0x00007FF8A2DD0000-0x00007FF8A3892000-memory.dmp
memory/4788-10-0x00007FF8A2DD0000-0x00007FF8A3892000-memory.dmp
memory/4788-11-0x00007FF8A2DD0000-0x00007FF8A3892000-memory.dmp
memory/4788-12-0x000000001B720000-0x000000001B770000-memory.dmp
memory/4788-13-0x000000001C0B0000-0x000000001C162000-memory.dmp
memory/4788-14-0x000000001C7A0000-0x000000001CCC8000-memory.dmp
memory/4788-16-0x00007FF8A2DD0000-0x00007FF8A3892000-memory.dmp
memory/4788-17-0x00007FF8A2DD0000-0x00007FF8A3892000-memory.dmp