Analysis
- max time kernel
149s - max time network
132s - platform
windows11-21h2_x64 - resource
win11-20251015-en - resource tags
- submitted
23/11/2025, 00:50
General
- Target Client.exe
- Size 348KB
- Sample251123-a7fhkasjer
- SHA256 b26df12d3e24ab67bb60e57976413340cb7d7421e7ccd893530c23f069c2e7a3
Malware Config
Extracted
-
quasar
-
1.3.0.0
-
Office04
-
176.123.1.70:1604
-
QSR_MUTEX_2dC0tNjtKtYhfGUSgk
-
encryption_key
Vl6roD6nO47rxhbzn50k
-
install_name
Client.exe
-
key_salt
bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941
-
log_directory
Logs
-
reconnect_delay
3000
-
startup_key
windows
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar family
- Quasar payload 1 IoCs
- Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 1 IoCs
- Suspicious use of WriteProcessMemory 3 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\Client.exe"C:\Users\Admin\AppData\Local\Temp\Client.exe"1⤵
- System Location Discovery: System Language Discovery
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "windows" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client.exe" /rl HIGHEST /f2⤵
- System Location Discovery: System Language Discovery
- Scheduled Task/Job: Scheduled Task
-
-
C:\Users\Admin\AppData\Local\Temp\Client.exeC:\Users\Admin\AppData\Local\Temp\Client.exe1⤵
- System Location Discovery: System Language Discovery
Network
MITRE ATT&CK Enterprise v16
Replay Monitor
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Downloads
memory/1044-7-0x00000000056D0000-0x00000000056E0000-memory.dmp
memory/5840-0-0x0000000000010000-0x000000000006E000-memory.dmp
memory/5840-1-0x00000000051B0000-0x0000000005756000-memory.dmp
memory/5840-2-0x0000000004B30000-0x0000000004BC2000-memory.dmp
memory/5840-3-0x0000000004BE0000-0x0000000004BF0000-memory.dmp
memory/5840-4-0x0000000004C00000-0x0000000004C66000-memory.dmp
memory/5840-5-0x0000000005190000-0x00000000051A2000-memory.dmp
memory/5840-6-0x0000000005D90000-0x0000000005DCC000-memory.dmp
memory/5840-8-0x00000000064D0000-0x00000000064DA000-memory.dmp