wastedlocker | e3bf41de3a7edf556d43b6196652aa036e48a602bb3f7c98af9dae992222a8eb

General

Target

wastlock_15.exe
Size

1.1MB
MD5

f67ea8e471e827e4b7b65b65647d1d46
SHA1

e62d3a4fe0da1b1b8e9bcff3148becd6d02bcb07
SHA256

e3bf41de3a7edf556d43b6196652aa036e48a602bb3f7c98af9dae992222a8eb
SHA512

b6b2cc29a5c5247d4a68ec7e7d0080e2f6e460eee98ece85498fe25b044beea8d3e15139bcdbaad744c6fb3e9caff7a127bd4487ba35c191a57883e2b47aecc4

Score

10^/10

ransomware persistence discovery exploit wastedlocker

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:

Id:binId.exe

pid process

2640 Id:bin
2072 Id.exe

pid	process
2640	Id:bin
2072	Id.exe

Modifies extensions of user files 15 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

Id.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\RequestPush.raw.eswasted	Id.exe
File opened for modification	C:\Users\Admin\Pictures\UnregisterRequest.tif.eswasted	Id.exe
File created	C:\Users\Admin\Pictures\DenyHide.crw.eswasted_info	Id.exe
File renamed	C:\Users\Admin\Pictures\InvokeConvert.png => C:\Users\Admin\Pictures\InvokeConvert.png.eswasted	Id.exe
File created	C:\Users\Admin\Pictures\RestoreDismount.png.eswasted_info	Id.exe
File renamed	C:\Users\Admin\Pictures\UnregisterRequest.tif => C:\Users\Admin\Pictures\UnregisterRequest.tif.eswasted	Id.exe
File opened for modification	C:\Users\Admin\Pictures\DenyHide.crw.eswasted	Id.exe
File opened for modification	C:\Users\Admin\Pictures\InvokeConvert.png.eswasted	Id.exe
File renamed	C:\Users\Admin\Pictures\RestoreDismount.png => C:\Users\Admin\Pictures\RestoreDismount.png.eswasted	Id.exe
File created	C:\Users\Admin\Pictures\UnregisterRequest.tif.eswasted_info	Id.exe
File renamed	C:\Users\Admin\Pictures\DenyHide.crw => C:\Users\Admin\Pictures\DenyHide.crw.eswasted	Id.exe
File created	C:\Users\Admin\Pictures\RequestPush.raw.eswasted_info	Id.exe
File renamed	C:\Users\Admin\Pictures\RequestPush.raw => C:\Users\Admin\Pictures\RequestPush.raw.eswasted	Id.exe
File opened for modification	C:\Users\Admin\Pictures\RestoreDismount.png.eswasted	Id.exe
File created	C:\Users\Admin\Pictures\InvokeConvert.png.eswasted_info	Id.exe

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

1512 takeown.exe
1888 icacls.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

1512 takeown.exe
1888 icacls.exe
Drops file in System32 directory 2 IoCs

Processes:

attrib.exeId:bin

description ioc process

File opened for modification C:\Windows\SysWOW64\Id.exe attrib.exe
File opened for modification C:\Windows\SysWOW64\Id.exe Id:bin

pid	process
1512	takeown.exe
1888	icacls.exe

pid	process
1512	takeown.exe
1888	icacls.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Id.exe	attrib.exe
File opened for modification	C:\Windows\SysWOW64\Id.exe	Id: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\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
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5}	vssvc.exe

Drops file in Windows directory 1 IoCs

Processes:

svchost.exe

description ioc process

File opened for modification C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat svchost.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

836 vssadmin.exe

description	ioc	process
File opened for modification	C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat	svchost.exe

pid	process
836	vssadmin.exe

Modifies data under HKEY_USERS 5 IoCs

Processes:

svchost.exe

description	ioc	process
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionTime = 94781867c37fd601	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecision = "0"	svchost.exe

NTFS ADS 1 IoCs

Processes:

wastlock_15.exe

description ioc process

File opened for modification C:\Users\Admin\AppData\Roaming\Id:bin wastlock_15.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Id:bin	wastlock_15.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

svchost.exevssvc.exe

description	pid	process
Token: SeShutdownPrivilege	3012	svchost.exe
Token: SeCreatePagefilePrivilege	3012	svchost.exe
Token: SeBackupPrivilege	1052	vssvc.exe
Token: SeRestorePrivilege	1052	vssvc.exe
Token: SeAuditPrivilege	1052	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

wastlock_15.exeId:binId.execmd.execmd.execmd.exe

description	pid	process	target process
PID 3060 wrote to memory of 2640	3060	wastlock_15.exe	Id:bin
PID 3060 wrote to memory of 2640	3060	wastlock_15.exe	Id:bin
PID 3060 wrote to memory of 2640	3060	wastlock_15.exe	Id:bin
PID 2640 wrote to memory of 836	2640	Id:bin	vssadmin.exe
PID 2640 wrote to memory of 836	2640	Id:bin	vssadmin.exe
PID 2640 wrote to memory of 1512	2640	Id:bin	takeown.exe
PID 2640 wrote to memory of 1512	2640	Id:bin	takeown.exe
PID 2640 wrote to memory of 1512	2640	Id:bin	takeown.exe
PID 2640 wrote to memory of 1888	2640	Id:bin	icacls.exe
PID 2640 wrote to memory of 1888	2640	Id:bin	icacls.exe
PID 2640 wrote to memory of 1888	2640	Id:bin	icacls.exe
PID 2072 wrote to memory of 2540	2072	Id.exe	cmd.exe
PID 2072 wrote to memory of 2540	2072	Id.exe	cmd.exe
PID 2072 wrote to memory of 2540	2072	Id.exe	cmd.exe
PID 2540 wrote to memory of 2800	2540	cmd.exe	choice.exe
PID 2540 wrote to memory of 2800	2540	cmd.exe	choice.exe
PID 2540 wrote to memory of 2800	2540	cmd.exe	choice.exe
PID 2640 wrote to memory of 1284	2640	Id:bin	cmd.exe
PID 2640 wrote to memory of 1284	2640	Id:bin	cmd.exe
PID 2640 wrote to memory of 1284	2640	Id:bin	cmd.exe
PID 3060 wrote to memory of 2620	3060	wastlock_15.exe	cmd.exe
PID 3060 wrote to memory of 2620	3060	wastlock_15.exe	cmd.exe
PID 3060 wrote to memory of 2620	3060	wastlock_15.exe	cmd.exe
PID 1284 wrote to memory of 3144	1284	cmd.exe	choice.exe
PID 1284 wrote to memory of 3144	1284	cmd.exe	choice.exe
PID 1284 wrote to memory of 3144	1284	cmd.exe	choice.exe
PID 2620 wrote to memory of 3808	2620	cmd.exe	choice.exe
PID 2620 wrote to memory of 3808	2620	cmd.exe	choice.exe
PID 2620 wrote to memory of 3808	2620	cmd.exe	choice.exe
PID 2540 wrote to memory of 264	2540	cmd.exe	attrib.exe
PID 2540 wrote to memory of 264	2540	cmd.exe	attrib.exe
PID 2540 wrote to memory of 264	2540	cmd.exe	attrib.exe
PID 1284 wrote to memory of 1056	1284	cmd.exe	attrib.exe
PID 1284 wrote to memory of 1056	1284	cmd.exe	attrib.exe
PID 1284 wrote to memory of 1056	1284	cmd.exe	attrib.exe
PID 2620 wrote to memory of 408	2620	cmd.exe	attrib.exe
PID 2620 wrote to memory of 408	2620	cmd.exe	attrib.exe
PID 2620 wrote to memory of 408	2620	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

408 attrib.exe
264 attrib.exe
1056 attrib.exe

pid	process
408	attrib.exe
264	attrib.exe
1056	attrib.exe

C:\Users\Admin\AppData\Local\Temp\wastlock_15.exe
"C:\Users\Admin\AppData\Local\Temp\wastlock_15.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3060

C:\Users\Admin\AppData\Roaming\Id:bin
C:\Users\Admin\AppData\Roaming\Id:bin -r
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:2640

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:836

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Id.exe
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1512

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Id.exe /reset
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1888

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Id" & del "C:\Users\Admin\AppData\Roaming\Id"
3⤵
- Suspicious use of WriteProcessMemory
PID:1284

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:3144

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Id"
4⤵
- Views/modifies file attributes
PID:1056

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\wastlock_15.exe" & del "C:\Users\Admin\AppData\Local\Temp\wastlock_15.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2620

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:3808

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\wastlock_15.exe"
3⤵
- Views/modifies file attributes
PID:408

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:3012

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1052

C:\Windows\SysWOW64\Id.exe
C:\Windows\SysWOW64\Id.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:2072

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Id.exe" & del "C:\Windows\SysWOW64\Id.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2540