Analysis
- max time kernel
91s - max time network
139s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
02/02/2023, 22:31
General
- Target aa14bc7fe4a9e56d75945dee38c3cf77.exe
- Size 502KB
- Sample230202-2fpeyage65
- SHA256 427decd0986270b1f3459b61c38d3abcbd68d3a1fb08ea39a9b681bb26ec1449
Malware Config
Extracted
-
quasar
-
1.4.0
-
Office04
-
20.223.155.39:8808
-
127.0. 0.1:8808
-
f0e07e87-d114-425a-9e4e-8911f3f02e74
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encryption_key
93E24ACE7FFA02F1927A56C62CFEFABC58E6463E
-
install_name
Client.exe
-
log_directory
Logs
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reconnect_delay
3000
-
startup_key
System
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 3 IoCs
- Executes dropped EXE 1 IoCs
- Looks up external IP address via web service 2 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of WriteProcessMemory 6 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\aa14bc7fe4a9e56d75945dee38c3cf77.exe"C:\Users\Admin\AppData\Local\Temp\aa14bc7fe4a9e56d75945dee38c3cf77.exe"1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\aa14bc7fe4a9e56d75945dee38c3cf77.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
-
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 WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exe"schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
Client.exe
Client.exe
memory/4592-139-0x00007FFD51160000-0x00007FFD51C21000-memory.dmp
memory/4592-141-0x0000000002C90000-0x0000000002CE0000-memory.dmp
memory/4592-142-0x000000001CBB0000-0x000000001CC62000-memory.dmp
memory/4592-143-0x00007FFD51160000-0x00007FFD51C21000-memory.dmp
memory/4932-132-0x0000000000060000-0x00000000000E4000-memory.dmp
memory/4932-133-0x00007FFD51160000-0x00007FFD51C21000-memory.dmp
memory/4932-138-0x00007FFD51160000-0x00007FFD51C21000-memory.dmp