wastedlocker | 5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367

General

Target

wastlock_1.exe
Size

1.0MB
MD5

572fea5f025df78f2d316216fbeee52e
SHA1

91b2bf44b1f9282c09f07f16631deaa3ad9d956d
SHA256

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367
SHA512

eb238272227c5825477ff1e37dc4f7e467665049d4db5649fff59c39d7745e88b06234d6d1218c05c802e33e21577f9d4a533cb9e23ebe6fb09654f97759c187

Score

10^/10

ransomware persistence exploit wastedlocker discovery

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:

Wallet:binWallet.exe

pid process

3564 Wallet:bin
500 Wallet.exe

pid	process
3564	Wallet:bin
500	Wallet.exe

Modifies extensions of user files 33 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

Wallet.exe

description	ioc	process
File created	C:\Users\Admin\Pictures\CompleteConvertTo.crw.rlhwasted_info	Wallet.exe
File created	C:\Users\Admin\Pictures\InstallUnblock.raw.rlhwasted_info	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\SavePush.raw.rlhwasted	Wallet.exe
File created	C:\Users\Admin\Pictures\ImportResolve.png.rlhwasted_info	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\ImportResolve.png.rlhwasted	Wallet.exe
File created	C:\Users\Admin\Pictures\SavePush.raw.rlhwasted_info	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\CompleteConvertTo.crw.rlhwasted	Wallet.exe
File renamed	C:\Users\Admin\Pictures\EnableSend.tif => C:\Users\Admin\Pictures\EnableSend.tif.rlhwasted	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\EnableSend.tif.rlhwasted	Wallet.exe
File renamed	C:\Users\Admin\Pictures\ImportResolve.png => C:\Users\Admin\Pictures\ImportResolve.png.rlhwasted	Wallet.exe
File renamed	C:\Users\Admin\Pictures\InstallUnblock.raw => C:\Users\Admin\Pictures\InstallUnblock.raw.rlhwasted	Wallet.exe
File renamed	C:\Users\Admin\Pictures\ResolveLimit.raw => C:\Users\Admin\Pictures\ResolveLimit.raw.rlhwasted	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\ShowOpen.png.rlhwasted	Wallet.exe
File renamed	C:\Users\Admin\Pictures\DismountNew.crw => C:\Users\Admin\Pictures\DismountNew.crw.rlhwasted	Wallet.exe
File created	C:\Users\Admin\Pictures\FindUnblock.tif.rlhwasted_info	Wallet.exe
File created	C:\Users\Admin\Pictures\EnableFormat.raw.rlhwasted_info	Wallet.exe
File renamed	C:\Users\Admin\Pictures\EnableFormat.raw => C:\Users\Admin\Pictures\EnableFormat.raw.rlhwasted	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\EnableFormat.raw.rlhwasted	Wallet.exe
File renamed	C:\Users\Admin\Pictures\FindUnblock.tif => C:\Users\Admin\Pictures\FindUnblock.tif.rlhwasted	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\InstallUnblock.raw.rlhwasted	Wallet.exe
File created	C:\Users\Admin\Pictures\ResolveLimit.raw.rlhwasted_info	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\ResolveLimit.raw.rlhwasted	Wallet.exe
File created	C:\Users\Admin\Pictures\CompleteRead.raw.rlhwasted_info	Wallet.exe
File renamed	C:\Users\Admin\Pictures\CompleteRead.raw => C:\Users\Admin\Pictures\CompleteRead.raw.rlhwasted	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\CompleteRead.raw.rlhwasted	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\DismountNew.crw.rlhwasted	Wallet.exe
File created	C:\Users\Admin\Pictures\EnableSend.tif.rlhwasted_info	Wallet.exe
File created	C:\Users\Admin\Pictures\ShowOpen.png.rlhwasted_info	Wallet.exe
File renamed	C:\Users\Admin\Pictures\ShowOpen.png => C:\Users\Admin\Pictures\ShowOpen.png.rlhwasted	Wallet.exe
File renamed	C:\Users\Admin\Pictures\CompleteConvertTo.crw => C:\Users\Admin\Pictures\CompleteConvertTo.crw.rlhwasted	Wallet.exe
File created	C:\Users\Admin\Pictures\DismountNew.crw.rlhwasted_info	Wallet.exe
File opened for modification	C:\Users\Admin\Pictures\FindUnblock.tif.rlhwasted	Wallet.exe
File renamed	C:\Users\Admin\Pictures\SavePush.raw => C:\Users\Admin\Pictures\SavePush.raw.rlhwasted	Wallet.exe

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

3152 takeown.exe
3324 icacls.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

3152 takeown.exe
3324 icacls.exe

pid	process
3152	takeown.exe
3324	icacls.exe

pid	process
3152	takeown.exe
3324	icacls.exe

Drops file in System32 directory 2 IoCs

Processes:

Wallet:binattrib.exe

description	ioc	process
File opened for modification	C:\Windows\SysWOW64\Wallet.exe	Wallet:bin
File opened for modification	C:\Windows\SysWOW64\Wallet.exe	attrib.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\Shadow Copy Optimization Writer	vssvc.exe
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

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

3960 vssadmin.exe

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

pid	process
3960	vssadmin.exe

Modifies data under HKEY_USERS 5 IoCs

Processes:

svchost.exe

description	ioc	process
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 = cedf2c24d47fd601	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
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

NTFS ADS 1 IoCs

Processes:

wastlock_1.exe

description ioc process

File opened for modification C:\Users\Admin\AppData\Roaming\Wallet:bin wastlock_1.exe

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

Suspicious use of AdjustPrivilegeToken 5 IoCs

Processes:

svchost.exevssvc.exe

description	pid	process
Token: SeShutdownPrivilege	868	svchost.exe
Token: SeCreatePagefilePrivilege	868	svchost.exe
Token: SeBackupPrivilege	3500	vssvc.exe
Token: SeRestorePrivilege	3500	vssvc.exe
Token: SeAuditPrivilege	3500	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

wastlock_1.exeWallet:binWallet.execmd.execmd.execmd.exe

description	pid	process	target process
PID 648 wrote to memory of 3564	648	wastlock_1.exe	Wallet:bin
PID 648 wrote to memory of 3564	648	wastlock_1.exe	Wallet:bin
PID 648 wrote to memory of 3564	648	wastlock_1.exe	Wallet:bin
PID 3564 wrote to memory of 3960	3564	Wallet:bin	vssadmin.exe
PID 3564 wrote to memory of 3960	3564	Wallet:bin	vssadmin.exe
PID 3564 wrote to memory of 3152	3564	Wallet:bin	takeown.exe
PID 3564 wrote to memory of 3152	3564	Wallet:bin	takeown.exe
PID 3564 wrote to memory of 3152	3564	Wallet:bin	takeown.exe
PID 3564 wrote to memory of 3324	3564	Wallet:bin	icacls.exe
PID 3564 wrote to memory of 3324	3564	Wallet:bin	icacls.exe
PID 3564 wrote to memory of 3324	3564	Wallet:bin	icacls.exe
PID 500 wrote to memory of 2868	500	Wallet.exe	cmd.exe
PID 500 wrote to memory of 2868	500	Wallet.exe	cmd.exe
PID 500 wrote to memory of 2868	500	Wallet.exe	cmd.exe
PID 2868 wrote to memory of 2348	2868	cmd.exe	choice.exe
PID 2868 wrote to memory of 2348	2868	cmd.exe	choice.exe
PID 2868 wrote to memory of 2348	2868	cmd.exe	choice.exe
PID 3564 wrote to memory of 3576	3564	Wallet:bin	cmd.exe
PID 3564 wrote to memory of 3576	3564	Wallet:bin	cmd.exe
PID 3564 wrote to memory of 3576	3564	Wallet:bin	cmd.exe
PID 648 wrote to memory of 4048	648	wastlock_1.exe	cmd.exe
PID 648 wrote to memory of 4048	648	wastlock_1.exe	cmd.exe
PID 648 wrote to memory of 4048	648	wastlock_1.exe	cmd.exe
PID 3576 wrote to memory of 1176	3576	cmd.exe	choice.exe
PID 3576 wrote to memory of 1176	3576	cmd.exe	choice.exe
PID 3576 wrote to memory of 1176	3576	cmd.exe	choice.exe
PID 4048 wrote to memory of 2212	4048	cmd.exe	choice.exe
PID 4048 wrote to memory of 2212	4048	cmd.exe	choice.exe
PID 4048 wrote to memory of 2212	4048	cmd.exe	choice.exe
PID 2868 wrote to memory of 3024	2868	cmd.exe	attrib.exe
PID 2868 wrote to memory of 3024	2868	cmd.exe	attrib.exe
PID 2868 wrote to memory of 3024	2868	cmd.exe	attrib.exe
PID 4048 wrote to memory of 252	4048	cmd.exe	attrib.exe
PID 4048 wrote to memory of 252	4048	cmd.exe	attrib.exe
PID 4048 wrote to memory of 252	4048	cmd.exe	attrib.exe
PID 3576 wrote to memory of 276	3576	cmd.exe	attrib.exe
PID 3576 wrote to memory of 276	3576	cmd.exe	attrib.exe
PID 3576 wrote to memory of 276	3576	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

3024 attrib.exe
252 attrib.exe
276 attrib.exe

pid	process
3024	attrib.exe
252	attrib.exe
276	attrib.exe

C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe
"C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:648

C:\Users\Admin\AppData\Roaming\Wallet:bin
C:\Users\Admin\AppData\Roaming\Wallet:bin -r
2⤵
- Executes dropped EXE
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:3564

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:3960

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Wallet.exe
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:3152

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Wallet.exe /reset
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:3324

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Wallet" & del "C:\Users\Admin\AppData\Roaming\Wallet"
3⤵
- Suspicious use of WriteProcessMemory
PID:3576

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:1176

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Wallet"
4⤵
- Views/modifies file attributes
PID:276

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⤵
- Suspicious use of WriteProcessMemory
PID:4048

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:2212

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe"
3⤵
- Views/modifies file attributes
PID:252

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:868

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:3500

C:\Windows\SysWOW64\Wallet.exe
C:\Windows\SysWOW64\Wallet.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:500

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Wallet.exe" & del "C:\Windows\SysWOW64\Wallet.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:2868

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:2348

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\Wallet.exe"
3⤵
- Drops file in System32 directory
- Views/modifies file attributes
PID:3024