wastedlocker | 5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367

General

Target

wastlock_1.exe
Size

1.0MB
MD5

572fea5f025df78f2d316216fbeee52e
SHA1

91b2bf44b1f9282c09f07f16631deaa3ad9d956d
SHA256

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367
SHA512

eb238272227c5825477ff1e37dc4f7e467665049d4db5649fff59c39d7745e88b06234d6d1218c05c802e33e21577f9d4a533cb9e23ebe6fb09654f97759c187

Score

10^/10

persistence discovery ransomware wastedlocker exploit

Malware Config

Signatures

WastedLocker
Ransomware family seen in the wild since May 2020.
ransomware wastedlocker
Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490
Executes dropped EXE 2 IoCs

Processes:

Net:binName.exe

pid process

1376 Net:bin
864 Name.exe

pid	process
1376	Net:bin
864	Name.exe

Modifies extensions of user files 15 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

Name.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\ConvertFromStop.raw.rlhwasted	Name.exe
File created	C:\Users\Admin\Pictures\InstallDisable.raw.rlhwasted_info	Name.exe
File opened for modification	C:\Users\Admin\Pictures\InstallDisable.raw.rlhwasted	Name.exe
File renamed	C:\Users\Admin\Pictures\RevokeSubmit.crw => C:\Users\Admin\Pictures\RevokeSubmit.crw.rlhwasted	Name.exe
File opened for modification	C:\Users\Admin\Pictures\SkipRemove.png.rlhwasted	Name.exe
File created	C:\Users\Admin\Pictures\UnprotectSwitch.tiff.rlhwasted_info	Name.exe
File created	C:\Users\Admin\Pictures\ConvertFromStop.raw.rlhwasted_info	Name.exe
File renamed	C:\Users\Admin\Pictures\ConvertFromStop.raw => C:\Users\Admin\Pictures\ConvertFromStop.raw.rlhwasted	Name.exe
File renamed	C:\Users\Admin\Pictures\InstallDisable.raw => C:\Users\Admin\Pictures\InstallDisable.raw.rlhwasted	Name.exe
File created	C:\Users\Admin\Pictures\RevokeSubmit.crw.rlhwasted_info	Name.exe
File opened for modification	C:\Users\Admin\Pictures\RevokeSubmit.crw.rlhwasted	Name.exe
File created	C:\Users\Admin\Pictures\SkipRemove.png.rlhwasted_info	Name.exe
File renamed	C:\Users\Admin\Pictures\SkipRemove.png => C:\Users\Admin\Pictures\SkipRemove.png.rlhwasted	Name.exe
File renamed	C:\Users\Admin\Pictures\UnprotectSwitch.tiff => C:\Users\Admin\Pictures\UnprotectSwitch.tiff.rlhwasted	Name.exe
File opened for modification	C:\Users\Admin\Pictures\UnprotectSwitch.tiff.rlhwasted	Name.exe

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

1760 takeown.exe
1168 icacls.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1532 cmd.exe
Loads dropped DLL 2 IoCs

Processes:

wastlock_1.exe

pid process

1152 wastlock_1.exe
1152 wastlock_1.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

1760 takeown.exe
1168 icacls.exe

pid	process
1760	takeown.exe
1168	icacls.exe

pid	process
1532	cmd.exe

pid	process
1152	wastlock_1.exe
1152	wastlock_1.exe

pid	process
1760	takeown.exe
1168	icacls.exe

Drops file in System32 directory 2 IoCs

Processes:

attrib.exeNet:bin

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

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\Registry Writer	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

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

1944 vssadmin.exe
NTFS ADS 1 IoCs

Processes:

wastlock_1.exe

description ioc process

File opened for modification C:\Users\Admin\AppData\Roaming\Net:bin wastlock_1.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1980 vssvc.exe
Token: SeRestorePrivilege 1980 vssvc.exe
Token: SeAuditPrivilege 1980 vssvc.exe

pid	process
1944	vssadmin.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Net:bin	wastlock_1.exe

description	pid	process
Token: SeBackupPrivilege	1980	vssvc.exe
Token: SeRestorePrivilege	1980	vssvc.exe
Token: SeAuditPrivilege	1980	vssvc.exe

Suspicious use of WriteProcessMemory 52 IoCs

Processes:

wastlock_1.exeNet:binName.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1152 wrote to memory of 1376	1152	wastlock_1.exe	Net:bin
PID 1152 wrote to memory of 1376	1152	wastlock_1.exe	Net:bin
PID 1152 wrote to memory of 1376	1152	wastlock_1.exe	Net:bin
PID 1152 wrote to memory of 1376	1152	wastlock_1.exe	Net:bin
PID 1376 wrote to memory of 1944	1376	Net:bin	vssadmin.exe
PID 1376 wrote to memory of 1944	1376	Net:bin	vssadmin.exe
PID 1376 wrote to memory of 1944	1376	Net:bin	vssadmin.exe
PID 1376 wrote to memory of 1944	1376	Net:bin	vssadmin.exe
PID 1376 wrote to memory of 1760	1376	Net:bin	takeown.exe
PID 1376 wrote to memory of 1760	1376	Net:bin	takeown.exe
PID 1376 wrote to memory of 1760	1376	Net:bin	takeown.exe
PID 1376 wrote to memory of 1760	1376	Net:bin	takeown.exe
PID 1376 wrote to memory of 1168	1376	Net:bin	icacls.exe
PID 1376 wrote to memory of 1168	1376	Net:bin	icacls.exe
PID 1376 wrote to memory of 1168	1376	Net:bin	icacls.exe
PID 1376 wrote to memory of 1168	1376	Net:bin	icacls.exe
PID 864 wrote to memory of 1496	864	Name.exe	cmd.exe
PID 864 wrote to memory of 1496	864	Name.exe	cmd.exe
PID 864 wrote to memory of 1496	864	Name.exe	cmd.exe
PID 864 wrote to memory of 1496	864	Name.exe	cmd.exe
PID 1496 wrote to memory of 816	1496	cmd.exe	choice.exe
PID 1496 wrote to memory of 816	1496	cmd.exe	choice.exe
PID 1496 wrote to memory of 816	1496	cmd.exe	choice.exe
PID 1496 wrote to memory of 816	1496	cmd.exe	choice.exe
PID 1376 wrote to memory of 524	1376	Net:bin	cmd.exe
PID 1376 wrote to memory of 524	1376	Net:bin	cmd.exe
PID 1376 wrote to memory of 524	1376	Net:bin	cmd.exe
PID 1376 wrote to memory of 524	1376	Net:bin	cmd.exe
PID 1152 wrote to memory of 1532	1152	wastlock_1.exe	cmd.exe
PID 1152 wrote to memory of 1532	1152	wastlock_1.exe	cmd.exe
PID 1152 wrote to memory of 1532	1152	wastlock_1.exe	cmd.exe
PID 1152 wrote to memory of 1532	1152	wastlock_1.exe	cmd.exe
PID 524 wrote to memory of 1084	524	cmd.exe	choice.exe
PID 524 wrote to memory of 1084	524	cmd.exe	choice.exe
PID 524 wrote to memory of 1084	524	cmd.exe	choice.exe
PID 524 wrote to memory of 1084	524	cmd.exe	choice.exe
PID 1532 wrote to memory of 884	1532	cmd.exe	choice.exe
PID 1532 wrote to memory of 884	1532	cmd.exe	choice.exe
PID 1532 wrote to memory of 884	1532	cmd.exe	choice.exe
PID 1532 wrote to memory of 884	1532	cmd.exe	choice.exe
PID 1496 wrote to memory of 276	1496	cmd.exe	attrib.exe
PID 1496 wrote to memory of 276	1496	cmd.exe	attrib.exe
PID 1496 wrote to memory of 276	1496	cmd.exe	attrib.exe
PID 1496 wrote to memory of 276	1496	cmd.exe	attrib.exe
PID 1532 wrote to memory of 1476	1532	cmd.exe	attrib.exe
PID 1532 wrote to memory of 1476	1532	cmd.exe	attrib.exe
PID 1532 wrote to memory of 1476	1532	cmd.exe	attrib.exe
PID 1532 wrote to memory of 1476	1532	cmd.exe	attrib.exe
PID 524 wrote to memory of 1564	524	cmd.exe	attrib.exe
PID 524 wrote to memory of 1564	524	cmd.exe	attrib.exe
PID 524 wrote to memory of 1564	524	cmd.exe	attrib.exe
PID 524 wrote to memory of 1564	524	cmd.exe	attrib.exe

Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

1476 attrib.exe
1564 attrib.exe
276 attrib.exe

pid	process
1476	attrib.exe
1564	attrib.exe
276	attrib.exe

C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe
"C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:1152

C:\Users\Admin\AppData\Roaming\Net:bin
C:\Users\Admin\AppData\Roaming\Net:bin -r
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:1376

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:1944

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Name.exe
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1760

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Name.exe /reset
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1168

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Net" & del "C:\Users\Admin\AppData\Roaming\Net"
3⤵
- Suspicious use of WriteProcessMemory
PID:524

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:1084

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Net"
4⤵
- Views/modifies file attributes
PID:1564

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe" & del "C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe"
2⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:884

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe"
3⤵
- Views/modifies file attributes
PID:1476

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1980

C:\Windows\SysWOW64\Name.exe
C:\Windows\SysWOW64\Name.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:864

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Name.exe" & del "C:\Windows\SysWOW64\Name.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1496

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:816

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\Name.exe"
3⤵
- Drops file in System32 directory
- Views/modifies file attributes
PID:276