Analysis
- max time kernel
152s - max time network
162s - platform
windows10-2004_x64 - resource
win10v2004-20231020-en - resource tags
- submitted
22/10/2023, 22:26
General
- Target Client-built.exe
- Size 288KB
- Sample231022-2c1nssfa27
- SHA256 60ac7265bca7554c1b44e9df57ea9960424a581a29222e0b6f0cc1aa54b37fef
Malware Config
Extracted
-
quasar
-
1.4.0.0
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keyauth
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okaa0-35095.portmap.host:25007
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XCN8AF3RJWl0AQkSQo
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encryption_key
wAFU7n1AkmM7sd0Wm2sH
-
install_name
COM Surrogate.exe
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log_directory
Logs
-
reconnect_delay
1
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startup_key
Google
-
subdirectory
SubDir
Signatures
- Quasar RAT
Quasar is an open source Remote Access Tool.
- Quasar payload 4 IoCs
- Executes dropped EXE 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.
- 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 SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
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\SysWOW64\schtasks.exe"schtasks" /create /tn "Google" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f2⤵
- Creates scheduled task(s)
-
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C:\Users\Admin\AppData\Roaming\SubDir\COM Surrogate.exe"C:\Users\Admin\AppData\Roaming\SubDir\COM Surrogate.exe"2⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\SysWOW64\schtasks.exe"schtasks" /create /tn "Google" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\COM Surrogate.exe" /rl HIGHEST /f3⤵
- Creates scheduled task(s)
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
COM Surrogate.exe
COM Surrogate.exe
memory/4200-4-0x0000000005810000-0x0000000005820000-memory.dmp
memory/4200-1-0x0000000000D50000-0x0000000000D9E000-memory.dmp
memory/4200-0-0x0000000074BD0000-0x0000000075380000-memory.dmp
memory/4200-5-0x0000000005790000-0x00000000057F6000-memory.dmp
memory/4200-6-0x00000000067C0000-0x00000000067D2000-memory.dmp
memory/4200-7-0x0000000006C00000-0x0000000006C3C000-memory.dmp
memory/4200-2-0x0000000005E10000-0x00000000063B4000-memory.dmp
memory/4200-3-0x0000000005860000-0x00000000058F2000-memory.dmp
memory/4200-16-0x0000000074BD0000-0x0000000075380000-memory.dmp
memory/4368-15-0x00000000028A0000-0x00000000028B0000-memory.dmp
memory/4368-14-0x0000000074BD0000-0x0000000075380000-memory.dmp
memory/4368-18-0x0000000006470000-0x000000000647A000-memory.dmp
memory/4368-19-0x0000000074BD0000-0x0000000075380000-memory.dmp
memory/4368-20-0x00000000028A0000-0x00000000028B0000-memory.dmp