Analysis
- max time kernel
238s - max time network
343s - platform
windows7_x64 - resource
win7-20221111-en - resource tags
- submitted
24/11/2022, 13:31
General
- Target AvastProxy.exe
- Size 56KB
- Sample221124-qsdcnafh33
- SHA256 560055994a2290b3eb3f354afbf5ebcf4b8d78820f238eae70d76ece81b97c23
Malware Config
Extracted
-
plugx
-
www.systeminfor.com:80
-
www.systeminfor.com:53
-
www.systeminfor.com:25
-
folder
AvastProxyETj
Signatures
- PlugX
PlugX is a RAT (Remote Access Trojan) that has been around since 2008.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 3 IoCs
- Unexpected DNS network traffic destination 2 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
- Adds Run key to start application 2 TTPs 4 IoCs
- Modifies registry class 3 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 3 IoCs
- Suspicious use of WriteProcessMemory 4 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\AvastProxy.exe"C:\Users\Admin\AppData\Local\Temp\AvastProxy.exe"1⤵
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
-
C:\ProgramData\AvastProxyETj\AvastProxy.exeC:\ProgramData\AvastProxyETj\AvastProxy.exe 6552⤵
- Executes dropped EXE
- Loads dropped DLL
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
AvastProxy.exe
main.dat
wsc.dll
AvastProxy.exe
AvastProxy.exe
wsc.dll
memory/1044-57-0x0000000000288000-0x00000000002AB000-memory.dmp
memory/1044-56-0x0000000076931000-0x0000000076933000-memory.dmp
memory/1044-62-0x0000000000288000-0x00000000002AB000-memory.dmp
memory/1044-55-0x00000000008F0000-0x0000000004521000-memory.dmp
memory/1044-54-0x0000000000288000-0x00000000002AB000-memory.dmp
memory/1168-66-0x00000000007B8000-0x00000000007DB000-memory.dmp
memory/1168-67-0x0000000000E80000-0x0000000004AB1000-memory.dmp
memory/1168-68-0x00000000007B8000-0x00000000007DB000-memory.dmp
memory/1168-70-0x00000000007B8000-0x00000000007DB000-memory.dmp