2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15

Modify Registry

Processes:

2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{296CD574-8B9A-11D5-EBA1-F78EEEEEE983}	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{296CD574-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "mskty32.exe"	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

Change Default File Association

T1546.001

Processes:

2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

Processes:

resource	yara_rule
behavioral2/memory/1888-0-0x0000000000400000-0x0000000000439000-memory.dmp	upx
C:\Windows\SysWOW64\concp32.exe	upx
behavioral2/memory/1888-7-0x0000000000400000-0x0000000000439000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

Drops file in System32 directory 6 IoCs

Processes:

2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

description	ioc	process
File created	C:\Windows\SysWOW64\vcl32.exe	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
File opened for modification	C:\Windows\SysWOW64\vcl32.exe	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
File created	C:\Windows\SysWOW64\mskty32.exe	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
File opened for modification	C:\Windows\SysWOW64\mskty32.exe	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
File created	C:\Windows\SysWOW64\concp32.exe	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
File opened for modification	C:\Windows\SysWOW64\concp32.exe	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

4728 1888 WerFault.exe 2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

pid	pid_target	process	target process
4728	1888	WerFault.exe	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

Modifies registry class 5 IoCs

Processes:

2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{296CD574-8B9A-11D5-EBA1-F78EEEEEE983}	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{296CD574-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{296CD574-8B9A-11D5-EBA1-F78EEEEEE983}\sm = ebb5525fa3bcf9422c8ff945977d6af9	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{296CD574-8B9A-11D5-EBA1-F78EEEEEE983}\ax = 4850400b2c82f2f86160a4c0c4c68bc9	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

pid process

1888 2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

pid	process
1888	2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe

C:\Users\Admin\AppData\Local\Temp\2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe
"C:\Users\Admin\AppData\Local\Temp\2c5e00d3084505e5fa1385f3cc76894c6b8c5503bbc3e94ca02a87b25ff13b15.exe"
1⤵
- Modifies Installed Components in the registry
- Modifies system executable filetype association
- Adds Run key to start application
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
PID:1888

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 1888 -s 744
2⤵
- Program crash
PID:4728

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 360 -p 1888 -ip 1888
1⤵
PID:3680

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Defense Evasion

Modify Registry

3