0f1502b9e88b65a84347da4c922933f7c8b8c2436d1d850f8f923bdb259d4bd3

System Information Discovery

Processes:

0f1502b9e88b65a84347da4c922933f7c8b8c2436d1d850f8f923bdb259d4bd3.exewinlogon.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	0f1502b9e88b65a84347da4c922933f7c8b8c2436d1d850f8f923bdb259d4bd3.exe
Key value queried	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\Control Panel\International\Geo\Nation	winlogon.exe

Drops startup file 2 IoCs

Processes:

cmd.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winlogon.exe	cmd.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winlogon.exe	cmd.exe

Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Uses the VBS compiler for execution 1 TTPs

Scripting
T1064

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

winlogon.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2295526160-1155304984-640977766-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\SubFolder\\SubFolder\\winlogon.exe"	winlogon.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Winlogon = "C:\\Users\\Admin\\AppData\\Roaming\\SubFolder\\SubFolder\\winlogon.exe"	winlogon.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

9 bot.whatismyipaddress.com

flow	ioc
9	bot.whatismyipaddress.com

Suspicious use of SetThreadContext 2 IoCs

Processes:

winlogon.exewinlogon.exe

description	pid	process	target process
PID 4708 set thread context of 4888	4708	winlogon.exe	winlogon.exe
PID 4888 set thread context of 4900	4888	winlogon.exe	vbc.exe

Drops file in Windows directory 1 IoCs

Processes:

dw20.exe

description ioc process

File created C:\Windows\AppCompat\Programs\Amcache.hve.tmp dw20.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File created	C:\Windows\AppCompat\Programs\Amcache.hve.tmp	dw20.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	dw20.exe

Enumerates system info in registry 2 TTPs 2 IoCs

Query Registry

System Information Discovery

Processes:

dw20.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	dw20.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	dw20.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

winlogon.exedw20.exe

description	pid	process
Token: SeDebugPrivilege	4888	winlogon.exe
Token: SeRestorePrivilege	1356	dw20.exe
Token: SeBackupPrivilege	1356	dw20.exe
Token: SeBackupPrivilege	1356	dw20.exe
Token: SeBackupPrivilege	1356	dw20.exe
Token: SeBackupPrivilege	1356	dw20.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

winlogon.exe

pid process

4888 winlogon.exe

pid	process
4888	winlogon.exe

Suspicious use of WriteProcessMemory 28 IoCs

Processes:

0f1502b9e88b65a84347da4c922933f7c8b8c2436d1d850f8f923bdb259d4bd3.exewinlogon.exewinlogon.exe

description	pid	process	target process
PID 3092 wrote to memory of 4708	3092	0f1502b9e88b65a84347da4c922933f7c8b8c2436d1d850f8f923bdb259d4bd3.exe	winlogon.exe
PID 3092 wrote to memory of 4708	3092	0f1502b9e88b65a84347da4c922933f7c8b8c2436d1d850f8f923bdb259d4bd3.exe	winlogon.exe
PID 4708 wrote to memory of 3376	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 3376	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 3376	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 4888	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 4888	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 4888	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 4888	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 4888	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 4888	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 4888	4708	winlogon.exe	winlogon.exe
PID 4708 wrote to memory of 4888	4708	winlogon.exe	winlogon.exe
PID 4888 wrote to memory of 4972	4888	winlogon.exe	cmd.exe
PID 4888 wrote to memory of 4972	4888	winlogon.exe	cmd.exe
PID 4888 wrote to memory of 4972	4888	winlogon.exe	cmd.exe
PID 4888 wrote to memory of 1356	4888	winlogon.exe	dw20.exe
PID 4888 wrote to memory of 1356	4888	winlogon.exe	dw20.exe
PID 4888 wrote to memory of 1356	4888	winlogon.exe	dw20.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe
PID 4888 wrote to memory of 4900	4888	winlogon.exe	vbc.exe

C:\Users\Admin\AppData\Local\Temp\0f1502b9e88b65a84347da4c922933f7c8b8c2436d1d850f8f923bdb259d4bd3.exe
"C:\Users\Admin\AppData\Local\Temp\0f1502b9e88b65a84347da4c922933f7c8b8c2436d1d850f8f923bdb259d4bd3.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3092

C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe
"C:\Users\Admin\AppData\Roaming\SubFolder\SubFolder\winlogon.exe"
2⤵
- Executes dropped EXE
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4708

C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe"
3⤵
- Executes dropped EXE
PID:3376

C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe
"C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe"
3⤵
- Executes dropped EXE
- Checks computer location settings
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4888

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /c copy /z "C:\Users\Admin\AppData\Roaming\Microsoft\winlogon.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\winlogon.exe"
4⤵
- Drops startup file
PID:4972

C:\Windows\Microsoft.NET\Framework\v2.0.50727\dw20.exe
dw20.exe -x -s 2456
4⤵
- Drops file in Windows directory
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious use of AdjustPrivilegeToken
PID:1356

C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe
"C:\Windows\Microsoft.NET\Framework\v2.0.50727\vbc.exe" /stext "C:\Users\Admin\AppData\Local\Temp\logff.txt
4⤵
PID:4900

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scripting

T1064

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

Scripting

Credential Access

Credentials in Files

T1081

Discovery

Query Registry

3

System Information Discovery

4

Lateral Movement

Collection

Data from Local System