Analysis
-
max time kernel
148s -
max time network
149s -
platform
windows7_x64 -
resource
win7-20240419-en -
resource tags
arch:x64arch:x86image:win7-20240419-enlocale:en-usos:windows7-x64system -
submitted
28-06-2024 06:33
Behavioral task
behavioral1
Sample
Cl1ient-built.exe
Resource
win7-20240419-en
General
-
Target
Cl1ient-built.exe
-
Size
3.1MB
-
MD5
00cac0e352ee5c12911f4eb29a34deac
-
SHA1
1bb09225aa309fc793e1eb27faa1ff8b1ccf9e50
-
SHA256
8b5341639e104df91c0dcbd5cec78286fa9b0fae7d19b637f3a11b93b48b655f
-
SHA512
9c7c0b55e794132a0d1a624a4326e33bbeedbac18f3af984cb3f6f81b6e4d534b63de23f027436eb85fdc40c1f4d8ccf1bd991b27e6303b35c975c78a4daa839
-
SSDEEP
49152:PvDI22SsaNYfdPBldt698dBcjHaLPnVjoGdhHTHHB72eh2NT:Pv822SsaNYfdPBldt6+dBcjHaTntx
Malware Config
Extracted
quasar
1.4.1
Office04
amount-socket.gl.at.ply.gg:29643
9bda9817-7d07-49e7-92d5-dcaf6b89216c
-
encryption_key
31B6B433E91FDBAAD05B632B163CCF988D67E433
-
install_name
system.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
svc
-
subdirectory
SubDir
Signatures
-
Quasar payload 3 IoCs
Processes:
resource yara_rule behavioral1/memory/1044-1-0x00000000003A0000-0x00000000006C4000-memory.dmp family_quasar C:\Windows\System32\SubDir\system.exe family_quasar behavioral1/memory/1740-8-0x00000000012E0000-0x0000000001604000-memory.dmp family_quasar -
Executes dropped EXE 1 IoCs
Processes:
system.exepid process 1740 system.exe -
Drops file in System32 directory 5 IoCs
Processes:
Cl1ient-built.exesystem.exedescription ioc process File created C:\Windows\system32\SubDir\system.exe Cl1ient-built.exe File opened for modification C:\Windows\system32\SubDir\system.exe Cl1ient-built.exe File opened for modification C:\Windows\system32\SubDir Cl1ient-built.exe File opened for modification C:\Windows\system32\SubDir\system.exe system.exe File opened for modification C:\Windows\system32\SubDir system.exe -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
-
Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
Processes:
schtasks.exeschtasks.exepid process 2208 schtasks.exe 2788 schtasks.exe -
Suspicious use of AdjustPrivilegeToken 2 IoCs
Processes:
Cl1ient-built.exesystem.exedescription pid process Token: SeDebugPrivilege 1044 Cl1ient-built.exe Token: SeDebugPrivilege 1740 system.exe -
Suspicious use of FindShellTrayWindow 1 IoCs
Processes:
system.exepid process 1740 system.exe -
Suspicious use of SendNotifyMessage 1 IoCs
Processes:
system.exepid process 1740 system.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
system.exepid process 1740 system.exe -
Suspicious use of WriteProcessMemory 9 IoCs
Processes:
Cl1ient-built.exesystem.exedescription pid process target process PID 1044 wrote to memory of 2208 1044 Cl1ient-built.exe schtasks.exe PID 1044 wrote to memory of 2208 1044 Cl1ient-built.exe schtasks.exe PID 1044 wrote to memory of 2208 1044 Cl1ient-built.exe schtasks.exe PID 1044 wrote to memory of 1740 1044 Cl1ient-built.exe system.exe PID 1044 wrote to memory of 1740 1044 Cl1ient-built.exe system.exe PID 1044 wrote to memory of 1740 1044 Cl1ient-built.exe system.exe PID 1740 wrote to memory of 2788 1740 system.exe schtasks.exe PID 1740 wrote to memory of 2788 1740 system.exe schtasks.exe PID 1740 wrote to memory of 2788 1740 system.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
-
C:\Users\Admin\AppData\Local\Temp\Cl1ient-built.exe"C:\Users\Admin\AppData\Local\Temp\Cl1ient-built.exe"1⤵
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "svc" /sc ONLOGON /tr "C:\Windows\system32\SubDir\system.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
C:\Windows\system32\SubDir\system.exe"C:\Windows\system32\SubDir\system.exe"2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\schtasks.exe"schtasks" /create /tn "svc" /sc ONLOGON /tr "C:\Windows\system32\SubDir\system.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
Network
MITRE ATT&CK Matrix ATT&CK v13
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Windows\System32\SubDir\system.exeFilesize
3.1MB
MD500cac0e352ee5c12911f4eb29a34deac
SHA11bb09225aa309fc793e1eb27faa1ff8b1ccf9e50
SHA2568b5341639e104df91c0dcbd5cec78286fa9b0fae7d19b637f3a11b93b48b655f
SHA5129c7c0b55e794132a0d1a624a4326e33bbeedbac18f3af984cb3f6f81b6e4d534b63de23f027436eb85fdc40c1f4d8ccf1bd991b27e6303b35c975c78a4daa839
-
memory/1044-0-0x000007FEF4EB3000-0x000007FEF4EB4000-memory.dmpFilesize
4KB
-
memory/1044-1-0x00000000003A0000-0x00000000006C4000-memory.dmpFilesize
3.1MB
-
memory/1044-2-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmpFilesize
9.9MB
-
memory/1044-10-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmpFilesize
9.9MB
-
memory/1740-11-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmpFilesize
9.9MB
-
memory/1740-9-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmpFilesize
9.9MB
-
memory/1740-8-0x00000000012E0000-0x0000000001604000-memory.dmpFilesize
3.1MB
-
memory/1740-12-0x000007FEF4EB0000-0x000007FEF589C000-memory.dmpFilesize
9.9MB