Analysis
- max time kernel
148s - max time network
163s - platform
windows10-2004_x64 - resource
win10v2004-20240704-en - resource tags
- submitted
06/07/2024, 00:37
General
- Target 111 checker (Test).exe
- Size 3.1MB
- Sample240706-ayymsashnc
- SHA256 5337578e169597847246ecaec1a67bca66b21ccff85f46e08031ba3be06d79c3
Malware Config
Extracted
-
quasar
-
1.4.1
-
Office04
-
10.0.2.15:80
-
a2864edd-f230-4b86-a825-937c11fae599
-
encryption_key
AD21EEEB96909AF88AAFEC6ED2CB042854DE83EE
-
install_name
Client.exe
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
Quasar Client Startup
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 2 IoCs
- Executes dropped EXE 1 IoCs
- Checks SCSI registry key(s) 3 TTPs 3 IoCs
SCSI information is often read in order to detect sandboxing environments.
- Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 13 IoCs
- Suspicious use of AdjustPrivilegeToken 7 IoCs
- Suspicious use of FindShellTrayWindow 38 IoCs
- Suspicious use of SendNotifyMessage 38 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 6 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
-
C:\Users\Admin\AppData\Local\Temp\111 checker (Test).exe"C:\Users\Admin\AppData\Local\Temp\111 checker (Test).exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f2⤵
- Scheduled Task/Job: Scheduled Task
-
-
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 SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Scheduled Task/Job: Scheduled Task
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-
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C:\Windows\system32\taskmgr.exe"C:\Windows\system32\taskmgr.exe" /41⤵
- Checks SCSI registry key(s)
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of FindShellTrayWindow
- Suspicious use of SendNotifyMessage
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
Client.exe
memory/2596-12-0x000000001BB60000-0x000000001BBB0000-memory.dmp
memory/2596-28-0x00007FF8CCA40000-0x00007FF8CD501000-memory.dmp
memory/2596-27-0x00007FF8CCA40000-0x00007FF8CD501000-memory.dmp
memory/2596-13-0x000000001BC70000-0x000000001BD22000-memory.dmp
memory/2596-9-0x00007FF8CCA40000-0x00007FF8CD501000-memory.dmp
memory/2596-11-0x00007FF8CCA40000-0x00007FF8CD501000-memory.dmp
memory/2876-16-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-24-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-14-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-20-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-15-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-26-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-25-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-21-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-23-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/2876-22-0x000002568D8A0000-0x000002568D8A1000-memory.dmp
memory/4300-10-0x00007FF8CCA40000-0x00007FF8CD501000-memory.dmp
memory/4300-0-0x00007FF8CCA43000-0x00007FF8CCA45000-memory.dmp
memory/4300-2-0x00007FF8CCA40000-0x00007FF8CD501000-memory.dmp
memory/4300-1-0x0000000000D30000-0x0000000001054000-memory.dmp