wastedlocker | 5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367

General

Target

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
Size

1.0MB
MD5

572fea5f025df78f2d316216fbeee52e
SHA1

91b2bf44b1f9282c09f07f16631deaa3ad9d956d
SHA256

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367
SHA512

eb238272227c5825477ff1e37dc4f7e467665049d4db5649fff59c39d7745e88b06234d6d1218c05c802e33e21577f9d4a533cb9e23ebe6fb09654f97759c187

Score

10^/10

ransomware discovery exploit wastedlocker persistence

Malware Config

Signatures

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exeSc:binLsa.execmd.execmd.execmd.exe

description	pid	process	target process
PID 3544 wrote to memory of 3672	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	Sc:bin
PID 3544 wrote to memory of 3672	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	Sc:bin
PID 3544 wrote to memory of 3672	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	Sc:bin
PID 3672 wrote to memory of 3932	3672	Sc:bin	vssadmin.exe
PID 3672 wrote to memory of 3932	3672	Sc:bin	vssadmin.exe
PID 3672 wrote to memory of 3972	3672	Sc:bin	takeown.exe
PID 3672 wrote to memory of 3972	3672	Sc:bin	takeown.exe
PID 3672 wrote to memory of 3972	3672	Sc:bin	takeown.exe
PID 3672 wrote to memory of 3444	3672	Sc:bin	icacls.exe
PID 3672 wrote to memory of 3444	3672	Sc:bin	icacls.exe
PID 3672 wrote to memory of 3444	3672	Sc:bin	icacls.exe
PID 1812 wrote to memory of 2828	1812	Lsa.exe	cmd.exe
PID 1812 wrote to memory of 2828	1812	Lsa.exe	cmd.exe
PID 1812 wrote to memory of 2828	1812	Lsa.exe	cmd.exe
PID 2828 wrote to memory of 3056	2828	cmd.exe	choice.exe
PID 2828 wrote to memory of 3056	2828	cmd.exe	choice.exe
PID 2828 wrote to memory of 3056	2828	cmd.exe	choice.exe
PID 3672 wrote to memory of 3264	3672	Sc:bin	cmd.exe
PID 3672 wrote to memory of 3264	3672	Sc:bin	cmd.exe
PID 3672 wrote to memory of 3264	3672	Sc:bin	cmd.exe
PID 3544 wrote to memory of 3240	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	cmd.exe
PID 3544 wrote to memory of 3240	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	cmd.exe
PID 3544 wrote to memory of 3240	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	cmd.exe
PID 3264 wrote to memory of 3720	3264	cmd.exe	choice.exe
PID 3264 wrote to memory of 3720	3264	cmd.exe	choice.exe
PID 3264 wrote to memory of 3720	3264	cmd.exe	choice.exe
PID 3240 wrote to memory of 520	3240	cmd.exe	choice.exe
PID 3240 wrote to memory of 520	3240	cmd.exe	choice.exe
PID 3240 wrote to memory of 520	3240	cmd.exe	choice.exe
PID 2828 wrote to memory of 636	2828	cmd.exe	attrib.exe
PID 2828 wrote to memory of 636	2828	cmd.exe	attrib.exe
PID 2828 wrote to memory of 636	2828	cmd.exe	attrib.exe
PID 3264 wrote to memory of 808	3264	cmd.exe	attrib.exe
PID 3264 wrote to memory of 808	3264	cmd.exe	attrib.exe
PID 3264 wrote to memory of 808	3264	cmd.exe	attrib.exe
PID 3240 wrote to memory of 912	3240	cmd.exe	attrib.exe
PID 3240 wrote to memory of 912	3240	cmd.exe	attrib.exe
PID 3240 wrote to memory of 912	3240	cmd.exe	attrib.exe

Executes dropped EXE 2 IoCs

Processes:

Sc:binLsa.exe

pid process

3672 Sc:bin
1812 Lsa.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3812 vssvc.exe
Token: SeRestorePrivilege 3812 vssvc.exe
Token: SeAuditPrivilege 3812 vssvc.exe
WastedLocker
Ransomware family seen in the wild since May 2020.
ransomware wastedlocker
Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

636 attrib.exe
808 attrib.exe
912 attrib.exe
Drops file in System32 directory 2 IoCs

Processes:

Sc:binattrib.exe

description ioc process

File opened for modification C:\Windows\SysWOW64\Lsa.exe Sc:bin
File opened for modification C:\Windows\SysWOW64\Lsa.exe attrib.exe
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

3972 takeown.exe
3444 icacls.exe
Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

3972 takeown.exe
3444 icacls.exe

pid	process
3672	Sc:bin
1812	Lsa.exe

description	pid	process
Token: SeBackupPrivilege	3812	vssvc.exe
Token: SeRestorePrivilege	3812	vssvc.exe
Token: SeAuditPrivilege	3812	vssvc.exe

pid	process
636	attrib.exe
808	attrib.exe
912	attrib.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Lsa.exe	Sc:bin
File opened for modification	C:\Windows\SysWOW64\Lsa.exe	attrib.exe

pid	process
3972	takeown.exe
3444	icacls.exe

pid	process
3972	takeown.exe
3444	icacls.exe

NTFS ADS 1 IoCs

Processes:

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Sc:bin	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe

Interacts with shadow copies 2 TTPs 1 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

Processes:

vssadmin.exe

pid process

3932 vssadmin.exe

pid	process
3932	vssadmin.exe

Modifies service 2 TTPs 5 IoCs

persistence

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

vssvc.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5}	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\COM+ REGDB Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Shadow Copy Optimization Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer	vssvc.exe

C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
"C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
1⤵
- Suspicious use of WriteProcessMemory
- NTFS ADS
PID:3544

C:\Users\Admin\AppData\Roaming\Sc:bin
C:\Users\Admin\AppData\Roaming\Sc:bin -r
2⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
- Drops file in System32 directory
PID:3672

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:3932

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Lsa.exe
3⤵
- Modifies file permissions
- Possible privilege escalation attempt
PID:3972

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Lsa.exe /reset
3⤵
- Modifies file permissions
- Possible privilege escalation attempt
PID:3444

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Sc" & del "C:\Users\Admin\AppData\Roaming\Sc"
3⤵
- Suspicious use of WriteProcessMemory
PID:3264

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:3720

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Sc"
4⤵
- Views/modifies file attributes
PID:808

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe" & del "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3240

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:520

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
3⤵
- Views/modifies file attributes
PID:912

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
- Modifies service
PID:3812

C:\Windows\SysWOW64\Lsa.exe
C:\Windows\SysWOW64\Lsa.exe -s
1⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:1812

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Lsa.exe" & del "C:\Windows\SysWOW64\Lsa.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2828