wastedlocker | 887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d

General

Target

887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe
Size

1.1MB
MD5

6b20ef8fb494cc6e455220356de298d0
SHA1

763d356d30e81d1cd15f6bc6a31f96181edb0b8f
SHA256

887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d
SHA512

ef53b73a911a608439bf929fa66a66fbf015ed274735b91c1d3b08128b14d6514d5514157e541441b9de0827d068c8f514cfd24a3a52fecb2d09764c4fb3311a

Score

10^/10

discovery exploit ransomware wastedlocker persistence

Malware Config

Signatures

Suspicious use of WriteProcessMemory 38 IoCs

Processes:

887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exeUtilities:binUtilities.execmd.execmd.execmd.exe

description	pid	process	target process
PID 716 wrote to memory of 336	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	Utilities:bin
PID 716 wrote to memory of 336	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	Utilities:bin
PID 716 wrote to memory of 336	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	Utilities:bin
PID 336 wrote to memory of 364	336	Utilities:bin	vssadmin.exe
PID 336 wrote to memory of 364	336	Utilities:bin	vssadmin.exe
PID 336 wrote to memory of 3912	336	Utilities:bin	takeown.exe
PID 336 wrote to memory of 3912	336	Utilities:bin	takeown.exe
PID 336 wrote to memory of 3912	336	Utilities:bin	takeown.exe
PID 336 wrote to memory of 3752	336	Utilities:bin	icacls.exe
PID 336 wrote to memory of 3752	336	Utilities:bin	icacls.exe
PID 336 wrote to memory of 3752	336	Utilities:bin	icacls.exe
PID 960 wrote to memory of 3508	960	Utilities.exe	cmd.exe
PID 960 wrote to memory of 3508	960	Utilities.exe	cmd.exe
PID 960 wrote to memory of 3508	960	Utilities.exe	cmd.exe
PID 3508 wrote to memory of 2504	3508	cmd.exe	choice.exe
PID 3508 wrote to memory of 2504	3508	cmd.exe	choice.exe
PID 3508 wrote to memory of 2504	3508	cmd.exe	choice.exe
PID 336 wrote to memory of 2844	336	Utilities:bin	cmd.exe
PID 336 wrote to memory of 2844	336	Utilities:bin	cmd.exe
PID 336 wrote to memory of 2844	336	Utilities:bin	cmd.exe
PID 716 wrote to memory of 1532	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	cmd.exe
PID 716 wrote to memory of 1532	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	cmd.exe
PID 716 wrote to memory of 1532	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	cmd.exe
PID 2844 wrote to memory of 3652	2844	cmd.exe	choice.exe
PID 2844 wrote to memory of 3652	2844	cmd.exe	choice.exe
PID 2844 wrote to memory of 3652	2844	cmd.exe	choice.exe
PID 1532 wrote to memory of 980	1532	cmd.exe	choice.exe
PID 1532 wrote to memory of 980	1532	cmd.exe	choice.exe
PID 1532 wrote to memory of 980	1532	cmd.exe	choice.exe
PID 3508 wrote to memory of 236	3508	cmd.exe	attrib.exe
PID 3508 wrote to memory of 236	3508	cmd.exe	attrib.exe
PID 3508 wrote to memory of 236	3508	cmd.exe	attrib.exe
PID 2844 wrote to memory of 256	2844	cmd.exe	attrib.exe
PID 2844 wrote to memory of 256	2844	cmd.exe	attrib.exe
PID 2844 wrote to memory of 256	2844	cmd.exe	attrib.exe
PID 1532 wrote to memory of 3676	1532	cmd.exe	attrib.exe
PID 1532 wrote to memory of 3676	1532	cmd.exe	attrib.exe
PID 1532 wrote to memory of 3676	1532	cmd.exe	attrib.exe

WastedLocker
Ransomware family seen in the wild since May 2020.
ransomware wastedlocker

Drops file in System32 directory 2 IoCs

Processes:

Utilities:binattrib.exe

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

Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware

File Deletion
T1107

Inhibit System Recovery
T1490

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

NTFS ADS 1 IoCs

Processes:

887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Utilities:bin	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe

Executes dropped EXE 2 IoCs

Processes:

Utilities:binUtilities.exe

pid process

336 Utilities:bin
960 Utilities.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 3728 vssvc.exe
Token: SeRestorePrivilege 3728 vssvc.exe
Token: SeAuditPrivilege 3728 vssvc.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exetakeown.exe

pid process

3752 icacls.exe
3912 takeown.exe
Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

3912 takeown.exe
3752 icacls.exe
Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

236 attrib.exe
256 attrib.exe
3676 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

364 vssadmin.exe

pid	process
336	Utilities:bin
960	Utilities.exe

description	pid	process
Token: SeBackupPrivilege	3728	vssvc.exe
Token: SeRestorePrivilege	3728	vssvc.exe
Token: SeAuditPrivilege	3728	vssvc.exe

pid	process
3752	icacls.exe
3912	takeown.exe

pid	process
3912	takeown.exe
3752	icacls.exe

pid	process
236	attrib.exe
256	attrib.exe
3676	attrib.exe

pid	process
364	vssadmin.exe

C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe
"C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe"
1⤵
- Suspicious use of WriteProcessMemory
- NTFS ADS
PID:716

C:\Users\Admin\AppData\Roaming\Utilities:bin
C:\Users\Admin\AppData\Roaming\Utilities:bin -r
2⤵
- Suspicious use of WriteProcessMemory
- Drops file in System32 directory
- Executes dropped EXE
PID:336

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:364

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Utilities.exe
3⤵
- Modifies file permissions
- Possible privilege escalation attempt
PID:3912

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Utilities.exe /reset
3⤵
- Modifies file permissions
- Possible privilege escalation attempt
PID:3752

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Utilities" & del "C:\Users\Admin\AppData\Roaming\Utilities"
3⤵
- Suspicious use of WriteProcessMemory
PID:2844

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:3652

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Utilities"
4⤵
- Views/modifies file attributes
PID:256

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe" & del "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1532

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:980

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe"
3⤵
- Views/modifies file attributes
PID:3676

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:3728

C:\Windows\SysWOW64\Utilities.exe
C:\Windows\SysWOW64\Utilities.exe -s
1⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:960

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Utilities.exe" & del "C:\Windows\SysWOW64\Utilities.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:3508

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:2504

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\Utilities.exe"
3⤵
- Drops file in System32 directory
- Views/modifies file attributes
PID:236