39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0

Modify Registry

Processes:

39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{91427B3F-8B9A-11D5-EBA1-F78EEEEEE983}	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{91427B3F-8B9A-11D5-EBA1-F78EEEEEE983}\StubPath = "msbdm32.exe"	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

Modifies system executable filetype association 2 TTPs 1 IoCs

persistence

Modify Registry

Change Default File Association

T1546.001

Processes:

39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

UPX packed file 3 IoCs

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

upx

Processes:

resource	yara_rule
behavioral2/memory/2108-0-0x0000000000400000-0x0000000000439000-memory.dmp	upx
C:\Windows\SysWOW64\concp32.exe	upx
behavioral2/memory/2108-7-0x0000000000400000-0x0000000000439000-memory.dmp	upx

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

Modify Registry

Processes:

39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

description	ioc	process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
Set value (str)	\REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\VCL = "vcl32.exe"	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

Drops file in System32 directory 6 IoCs

Processes:

39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

description	ioc	process
File created	C:\Windows\SysWOW64\vcl32.exe	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
File opened for modification	C:\Windows\SysWOW64\vcl32.exe	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
File created	C:\Windows\SysWOW64\msbdm32.exe	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
File opened for modification	C:\Windows\SysWOW64\msbdm32.exe	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
File created	C:\Windows\SysWOW64\concp32.exe	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
File opened for modification	C:\Windows\SysWOW64\concp32.exe	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

1696 2108 WerFault.exe 39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

pid	pid_target	process	target process
1696	2108	WerFault.exe	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

Modifies registry class 5 IoCs

Processes:

39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

description	ioc	process
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{91427B3F-8B9A-11D5-EBA1-F78EEEEEE983}\sm = 01b8ec350471bd332433eee476ebe1f3	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{91427B3F-8B9A-11D5-EBA1-F78EEEEEE983}\ax = 1484af20fd2a884dc099ba27566474ee	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\exefile\shell\open\command\ = "C:\\Windows\\SysWow64\\concp32.exe \"%1\" %*"	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{91427B3F-8B9A-11D5-EBA1-F78EEEEEE983}	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{91427B3F-8B9A-11D5-EBA1-F78EEEEEE983}\InprocServer32	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

pid process

2108 39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

pid	process
2108	39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe

C:\Users\Admin\AppData\Local\Temp\39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.exe
"C:\Users\Admin\AppData\Local\Temp\39615fad214e0b3836d4281f228870eaecf2dcb2a71736c69fde5ad5c766b5a0.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:2108

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 2108 -s 732
2⤵
- Program crash
PID:1696

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 2108 -ip 2108
1⤵
PID:4476

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