wastedlocker | e3bf41de3a7edf556d43b6196652aa036e48a602bb3f7c98af9dae992222a8eb

General

Target

wastlock_15.exe
Size

1.1MB
MD5

f67ea8e471e827e4b7b65b65647d1d46
SHA1

e62d3a4fe0da1b1b8e9bcff3148becd6d02bcb07
SHA256

e3bf41de3a7edf556d43b6196652aa036e48a602bb3f7c98af9dae992222a8eb
SHA512

b6b2cc29a5c5247d4a68ec7e7d0080e2f6e460eee98ece85498fe25b044beea8d3e15139bcdbaad744c6fb3e9caff7a127bd4487ba35c191a57883e2b47aecc4

Score

10^/10

discovery exploit ransomware wastedlocker persistence

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

308 Net:bin
1728 Name.exe

pid	process
308	Net:bin
1728	Name.exe

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

Name.exe

description	ioc	process
File created	C:\Users\Admin\Pictures\ConfirmResume.tif.eswasted_info	Name.exe
File renamed	C:\Users\Admin\Pictures\ConfirmResume.tif => C:\Users\Admin\Pictures\ConfirmResume.tif.eswasted	Name.exe
File opened for modification	C:\Users\Admin\Pictures\ConfirmResume.tif.eswasted	Name.exe
File created	C:\Users\Admin\Pictures\SkipUpdate.png.eswasted_info	Name.exe
File renamed	C:\Users\Admin\Pictures\SkipUpdate.png => C:\Users\Admin\Pictures\SkipUpdate.png.eswasted	Name.exe
File opened for modification	C:\Users\Admin\Pictures\SkipUpdate.png.eswasted	Name.exe

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

1640 takeown.exe
1608 icacls.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1032 cmd.exe
Loads dropped DLL 2 IoCs

Processes:

wastlock_15.exe

pid process

1044 wastlock_15.exe
1044 wastlock_15.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

1640 takeown.exe
1608 icacls.exe

pid	process
1640	takeown.exe
1608	icacls.exe

pid	process
1032	cmd.exe

pid	process
1044	wastlock_15.exe
1044	wastlock_15.exe

pid	process
1640	takeown.exe
1608	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\Registry 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\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

752 vssadmin.exe
NTFS ADS 1 IoCs

Processes:

wastlock_15.exe

description ioc process

File opened for modification C:\Users\Admin\AppData\Roaming\Net:bin wastlock_15.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1052 vssvc.exe
Token: SeRestorePrivilege 1052 vssvc.exe
Token: SeAuditPrivilege 1052 vssvc.exe

pid	process
752	vssadmin.exe

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

description	pid	process
Token: SeBackupPrivilege	1052	vssvc.exe
Token: SeRestorePrivilege	1052	vssvc.exe
Token: SeAuditPrivilege	1052	vssvc.exe

Suspicious use of WriteProcessMemory 52 IoCs

Processes:

wastlock_15.exeNet:binName.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1044 wrote to memory of 308	1044	wastlock_15.exe	Net:bin
PID 1044 wrote to memory of 308	1044	wastlock_15.exe	Net:bin
PID 1044 wrote to memory of 308	1044	wastlock_15.exe	Net:bin
PID 1044 wrote to memory of 308	1044	wastlock_15.exe	Net:bin
PID 308 wrote to memory of 752	308	Net:bin	vssadmin.exe
PID 308 wrote to memory of 752	308	Net:bin	vssadmin.exe
PID 308 wrote to memory of 752	308	Net:bin	vssadmin.exe
PID 308 wrote to memory of 752	308	Net:bin	vssadmin.exe
PID 308 wrote to memory of 1640	308	Net:bin	takeown.exe
PID 308 wrote to memory of 1640	308	Net:bin	takeown.exe
PID 308 wrote to memory of 1640	308	Net:bin	takeown.exe
PID 308 wrote to memory of 1640	308	Net:bin	takeown.exe
PID 308 wrote to memory of 1608	308	Net:bin	icacls.exe
PID 308 wrote to memory of 1608	308	Net:bin	icacls.exe
PID 308 wrote to memory of 1608	308	Net:bin	icacls.exe
PID 308 wrote to memory of 1608	308	Net:bin	icacls.exe
PID 1728 wrote to memory of 1952	1728	Name.exe	cmd.exe
PID 1728 wrote to memory of 1952	1728	Name.exe	cmd.exe
PID 1728 wrote to memory of 1952	1728	Name.exe	cmd.exe
PID 1728 wrote to memory of 1952	1728	Name.exe	cmd.exe
PID 1952 wrote to memory of 1908	1952	cmd.exe	choice.exe
PID 1952 wrote to memory of 1908	1952	cmd.exe	choice.exe
PID 1952 wrote to memory of 1908	1952	cmd.exe	choice.exe
PID 1952 wrote to memory of 1908	1952	cmd.exe	choice.exe
PID 308 wrote to memory of 1184	308	Net:bin	cmd.exe
PID 308 wrote to memory of 1184	308	Net:bin	cmd.exe
PID 308 wrote to memory of 1184	308	Net:bin	cmd.exe
PID 308 wrote to memory of 1184	308	Net:bin	cmd.exe
PID 1044 wrote to memory of 1032	1044	wastlock_15.exe	cmd.exe
PID 1044 wrote to memory of 1032	1044	wastlock_15.exe	cmd.exe
PID 1044 wrote to memory of 1032	1044	wastlock_15.exe	cmd.exe
PID 1044 wrote to memory of 1032	1044	wastlock_15.exe	cmd.exe
PID 1184 wrote to memory of 1820	1184	cmd.exe	choice.exe
PID 1184 wrote to memory of 1820	1184	cmd.exe	choice.exe
PID 1184 wrote to memory of 1820	1184	cmd.exe	choice.exe
PID 1184 wrote to memory of 1820	1184	cmd.exe	choice.exe
PID 1032 wrote to memory of 560	1032	cmd.exe	choice.exe
PID 1032 wrote to memory of 560	1032	cmd.exe	choice.exe
PID 1032 wrote to memory of 560	1032	cmd.exe	choice.exe
PID 1032 wrote to memory of 560	1032	cmd.exe	choice.exe
PID 1952 wrote to memory of 1988	1952	cmd.exe	attrib.exe
PID 1952 wrote to memory of 1988	1952	cmd.exe	attrib.exe
PID 1952 wrote to memory of 1988	1952	cmd.exe	attrib.exe
PID 1952 wrote to memory of 1988	1952	cmd.exe	attrib.exe
PID 1184 wrote to memory of 1964	1184	cmd.exe	attrib.exe
PID 1184 wrote to memory of 1964	1184	cmd.exe	attrib.exe
PID 1184 wrote to memory of 1964	1184	cmd.exe	attrib.exe
PID 1184 wrote to memory of 1964	1184	cmd.exe	attrib.exe
PID 1032 wrote to memory of 2000	1032	cmd.exe	attrib.exe
PID 1032 wrote to memory of 2000	1032	cmd.exe	attrib.exe
PID 1032 wrote to memory of 2000	1032	cmd.exe	attrib.exe
PID 1032 wrote to memory of 2000	1032	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

1988 attrib.exe
2000 attrib.exe
1964 attrib.exe

pid	process
1988	attrib.exe
2000	attrib.exe
1964	attrib.exe

C:\Users\Admin\AppData\Local\Temp\wastlock_15.exe
"C:\Users\Admin\AppData\Local\Temp\wastlock_15.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:1044

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:308

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:752

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:1640

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:1608

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:1184

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:1820

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Net"
4⤵
- Views/modifies file attributes
PID:1964

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⤵
- Deletes itself
- Suspicious use of WriteProcessMemory
PID:1032

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:560

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\wastlock_15.exe"
3⤵
- Views/modifies file attributes
PID:2000

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

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:1728

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:1952

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:1908

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\Name.exe"
3⤵
- Drops file in System32 directory
- Views/modifies file attributes
PID:1988