wastedlocker | 0e061255b12ade5dc10f4ad9aeca9ebe5496d28ed251acb376c66c1d9f405821

General

Target

lock.exe
Size

112KB
MD5

d01fc079881dc0d33a88e4f8df1ae7ce
SHA1

c40c8848808da12ef78c68de1e6477b862161a43
SHA256

0e061255b12ade5dc10f4ad9aeca9ebe5496d28ed251acb376c66c1d9f405821
SHA512

83bca79d1f0ac14c6d79685fd192964e7117e8c9c734036abddfdbb068c801ff38027a0812a2499e1d9e528a47af07150cafee27384b5a78b8fc32c23bd21130

Score

10^/10

persistence exploit ransomware wastedlocker discovery

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

1820 takeown.exe
1832 icacls.exe
Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

1912 attrib.exe
1892 attrib.exe
1932 attrib.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

pid	process
1820	takeown.exe
1832	icacls.exe

pid	process
1912	attrib.exe
1892	attrib.exe
1932	attrib.exe

pid	process
836	vssadmin.exe

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

Query.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\UnlockRead.png.tcwwasted	Query.exe
File created	C:\Users\Admin\Pictures\EditConvertTo.raw.tcwwasted_info	Query.exe
File renamed	C:\Users\Admin\Pictures\EditConvertTo.raw => C:\Users\Admin\Pictures\EditConvertTo.raw.tcwwasted	Query.exe
File opened for modification	C:\Users\Admin\Pictures\EditConvertTo.raw.tcwwasted	Query.exe
File created	C:\Users\Admin\Pictures\UnlockRead.png.tcwwasted_info	Query.exe
File renamed	C:\Users\Admin\Pictures\UnlockRead.png => C:\Users\Admin\Pictures\UnlockRead.png.tcwwasted	Query.exe

Suspicious use of WriteProcessMemory 52 IoCs

Processes:

lock.exeQuery:binQuery.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1424 wrote to memory of 1464	1424	lock.exe	Query:bin
PID 1424 wrote to memory of 1464	1424	lock.exe	Query:bin
PID 1424 wrote to memory of 1464	1424	lock.exe	Query:bin
PID 1424 wrote to memory of 1464	1424	lock.exe	Query:bin
PID 1464 wrote to memory of 836	1464	Query:bin	vssadmin.exe
PID 1464 wrote to memory of 836	1464	Query:bin	vssadmin.exe
PID 1464 wrote to memory of 836	1464	Query:bin	vssadmin.exe
PID 1464 wrote to memory of 836	1464	Query:bin	vssadmin.exe
PID 1464 wrote to memory of 1820	1464	Query:bin	takeown.exe
PID 1464 wrote to memory of 1820	1464	Query:bin	takeown.exe
PID 1464 wrote to memory of 1820	1464	Query:bin	takeown.exe
PID 1464 wrote to memory of 1820	1464	Query:bin	takeown.exe
PID 1464 wrote to memory of 1832	1464	Query:bin	icacls.exe
PID 1464 wrote to memory of 1832	1464	Query:bin	icacls.exe
PID 1464 wrote to memory of 1832	1464	Query:bin	icacls.exe
PID 1464 wrote to memory of 1832	1464	Query:bin	icacls.exe
PID 1784 wrote to memory of 984	1784	Query.exe	cmd.exe
PID 1784 wrote to memory of 984	1784	Query.exe	cmd.exe
PID 1784 wrote to memory of 984	1784	Query.exe	cmd.exe
PID 1784 wrote to memory of 984	1784	Query.exe	cmd.exe
PID 984 wrote to memory of 1316	984	cmd.exe	choice.exe
PID 984 wrote to memory of 1316	984	cmd.exe	choice.exe
PID 984 wrote to memory of 1316	984	cmd.exe	choice.exe
PID 984 wrote to memory of 1316	984	cmd.exe	choice.exe
PID 1464 wrote to memory of 876	1464	Query:bin	cmd.exe
PID 1464 wrote to memory of 876	1464	Query:bin	cmd.exe
PID 1464 wrote to memory of 876	1464	Query:bin	cmd.exe
PID 1464 wrote to memory of 876	1464	Query:bin	cmd.exe
PID 1424 wrote to memory of 1516	1424	lock.exe	cmd.exe
PID 1424 wrote to memory of 1516	1424	lock.exe	cmd.exe
PID 1424 wrote to memory of 1516	1424	lock.exe	cmd.exe
PID 1424 wrote to memory of 1516	1424	lock.exe	cmd.exe
PID 876 wrote to memory of 1580	876	cmd.exe	choice.exe
PID 876 wrote to memory of 1580	876	cmd.exe	choice.exe
PID 876 wrote to memory of 1580	876	cmd.exe	choice.exe
PID 876 wrote to memory of 1580	876	cmd.exe	choice.exe
PID 1516 wrote to memory of 1584	1516	cmd.exe	choice.exe
PID 1516 wrote to memory of 1584	1516	cmd.exe	choice.exe
PID 1516 wrote to memory of 1584	1516	cmd.exe	choice.exe
PID 1516 wrote to memory of 1584	1516	cmd.exe	choice.exe
PID 876 wrote to memory of 1892	876	cmd.exe	attrib.exe
PID 876 wrote to memory of 1892	876	cmd.exe	attrib.exe
PID 876 wrote to memory of 1892	876	cmd.exe	attrib.exe
PID 876 wrote to memory of 1892	876	cmd.exe	attrib.exe
PID 1516 wrote to memory of 1932	1516	cmd.exe	attrib.exe
PID 1516 wrote to memory of 1932	1516	cmd.exe	attrib.exe
PID 1516 wrote to memory of 1932	1516	cmd.exe	attrib.exe
PID 1516 wrote to memory of 1932	1516	cmd.exe	attrib.exe
PID 984 wrote to memory of 1912	984	cmd.exe	attrib.exe
PID 984 wrote to memory of 1912	984	cmd.exe	attrib.exe
PID 984 wrote to memory of 1912	984	cmd.exe	attrib.exe
PID 984 wrote to memory of 1912	984	cmd.exe	attrib.exe

Executes dropped EXE 2 IoCs

Processes:

Query:binQuery.exe

pid process

1464 Query:bin
1784 Query.exe

pid	process
1464	Query:bin
1784	Query.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\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
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer	vssvc.exe

Drops file in System32 directory 2 IoCs

Processes:

Query:binattrib.exe

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

Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

1820 takeown.exe
1832 icacls.exe
Loads dropped DLL 2 IoCs

Processes:

lock.exe

pid process

1424 lock.exe
1424 lock.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1008 vssvc.exe
Token: SeRestorePrivilege 1008 vssvc.exe
Token: SeAuditPrivilege 1008 vssvc.exe
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
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1516 cmd.exe
NTFS ADS 1 IoCs

Processes:

lock.exe

description ioc process

File opened for modification C:\Users\Admin\AppData\Roaming\Query:bin lock.exe

pid	process
1820	takeown.exe
1832	icacls.exe

pid	process
1424	lock.exe
1424	lock.exe

description	pid	process
Token: SeBackupPrivilege	1008	vssvc.exe
Token: SeRestorePrivilege	1008	vssvc.exe
Token: SeAuditPrivilege	1008	vssvc.exe

pid	process
1516	cmd.exe

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

C:\Users\Admin\AppData\Local\Temp\lock.exe
"C:\Users\Admin\AppData\Local\Temp\lock.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Loads dropped DLL
- NTFS ADS
PID:1424

C:\Users\Admin\AppData\Roaming\Query:bin
C:\Users\Admin\AppData\Roaming\Query:bin -r
2⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
- Drops file in System32 directory
PID:1464

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\Query.exe
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1820

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Query.exe /reset
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1832

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Query" & del "C:\Users\Admin\AppData\Roaming\Query"
3⤵
- Suspicious use of WriteProcessMemory
PID:876

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:1580

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Query"
4⤵
- Views/modifies file attributes
PID:1892

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\lock.exe" & del "C:\Users\Admin\AppData\Local\Temp\lock.exe"
2⤵
- Suspicious use of WriteProcessMemory
- Deletes itself
PID:1516

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:1584

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\lock.exe"
3⤵
- Views/modifies file attributes
PID:1932

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1008

C:\Windows\SysWOW64\Query.exe
C:\Windows\SysWOW64\Query.exe -s
1⤵
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:1784

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Query.exe" & del "C:\Windows\SysWOW64\Query.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:984

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:1316

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\Query.exe"
3⤵
- Views/modifies file attributes
- Drops file in System32 directory
PID:1912