wastedlocker | 905ea119ad8d3e54cd228c458a1b5681abc1f35df782977a23812ec4efa0288a

General

Target

Interfaces.bin.exe
Size

1.2MB
MD5

2cc4534b0dd0e1c8d5b89644274a10c1
SHA1

735ee2c15c0b7172f65d39f0fd33b9186ee69653
SHA256

905ea119ad8d3e54cd228c458a1b5681abc1f35df782977a23812ec4efa0288a
SHA512

a842b2d171aa6efa1b391d5d0f84663e78021b485555e2bf10a5e589d8652057f5abbd88e1a5ec628b714692ec5d63c3172894aa7846d5897e87d99dad67e2b8

Score

10^/10

persistence discovery exploit ransomware wastedlocker

Malware Config

Signatures

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

vssvc.exe

description pid process

Token: SeBackupPrivilege 1004 vssvc.exe
Token: SeRestorePrivilege 1004 vssvc.exe
Token: SeAuditPrivilege 1004 vssvc.exe
Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

1500 takeown.exe
1792 icacls.exe

description	pid	process
Token: SeBackupPrivilege	1004	vssvc.exe
Token: SeRestorePrivilege	1004	vssvc.exe
Token: SeAuditPrivilege	1004	vssvc.exe

pid	process
1500	takeown.exe
1792	icacls.exe

Suspicious use of WriteProcessMemory 52 IoCs

Processes:

Interfaces.bin.exeGroup:binGroup.execmd.execmd.execmd.exe

description	pid	process	target process
PID 608 wrote to memory of 1184	608	Interfaces.bin.exe	Group:bin
PID 608 wrote to memory of 1184	608	Interfaces.bin.exe	Group:bin
PID 608 wrote to memory of 1184	608	Interfaces.bin.exe	Group:bin
PID 608 wrote to memory of 1184	608	Interfaces.bin.exe	Group:bin
PID 1184 wrote to memory of 1420	1184	Group:bin	vssadmin.exe
PID 1184 wrote to memory of 1420	1184	Group:bin	vssadmin.exe
PID 1184 wrote to memory of 1420	1184	Group:bin	vssadmin.exe
PID 1184 wrote to memory of 1420	1184	Group:bin	vssadmin.exe
PID 1184 wrote to memory of 1500	1184	Group:bin	takeown.exe
PID 1184 wrote to memory of 1500	1184	Group:bin	takeown.exe
PID 1184 wrote to memory of 1500	1184	Group:bin	takeown.exe
PID 1184 wrote to memory of 1500	1184	Group:bin	takeown.exe
PID 1184 wrote to memory of 1792	1184	Group:bin	icacls.exe
PID 1184 wrote to memory of 1792	1184	Group:bin	icacls.exe
PID 1184 wrote to memory of 1792	1184	Group:bin	icacls.exe
PID 1184 wrote to memory of 1792	1184	Group:bin	icacls.exe
PID 1768 wrote to memory of 1836	1768	Group.exe	cmd.exe
PID 1768 wrote to memory of 1836	1768	Group.exe	cmd.exe
PID 1768 wrote to memory of 1836	1768	Group.exe	cmd.exe
PID 1768 wrote to memory of 1836	1768	Group.exe	cmd.exe
PID 1836 wrote to memory of 1632	1836	cmd.exe	choice.exe
PID 1836 wrote to memory of 1632	1836	cmd.exe	choice.exe
PID 1836 wrote to memory of 1632	1836	cmd.exe	choice.exe
PID 1836 wrote to memory of 1632	1836	cmd.exe	choice.exe
PID 1184 wrote to memory of 1576	1184	Group:bin	cmd.exe
PID 1184 wrote to memory of 1576	1184	Group:bin	cmd.exe
PID 1184 wrote to memory of 1576	1184	Group:bin	cmd.exe
PID 1184 wrote to memory of 1576	1184	Group:bin	cmd.exe
PID 608 wrote to memory of 1636	608	Interfaces.bin.exe	cmd.exe
PID 608 wrote to memory of 1636	608	Interfaces.bin.exe	cmd.exe
PID 608 wrote to memory of 1636	608	Interfaces.bin.exe	cmd.exe
PID 608 wrote to memory of 1636	608	Interfaces.bin.exe	cmd.exe
PID 1576 wrote to memory of 1568	1576	cmd.exe	choice.exe
PID 1576 wrote to memory of 1568	1576	cmd.exe	choice.exe
PID 1576 wrote to memory of 1568	1576	cmd.exe	choice.exe
PID 1576 wrote to memory of 1568	1576	cmd.exe	choice.exe
PID 1636 wrote to memory of 1904	1636	cmd.exe	choice.exe
PID 1636 wrote to memory of 1904	1636	cmd.exe	choice.exe
PID 1636 wrote to memory of 1904	1636	cmd.exe	choice.exe
PID 1636 wrote to memory of 1904	1636	cmd.exe	choice.exe
PID 1836 wrote to memory of 1932	1836	cmd.exe	attrib.exe
PID 1836 wrote to memory of 1932	1836	cmd.exe	attrib.exe
PID 1836 wrote to memory of 1932	1836	cmd.exe	attrib.exe
PID 1836 wrote to memory of 1932	1836	cmd.exe	attrib.exe
PID 1576 wrote to memory of 1896	1576	cmd.exe	attrib.exe
PID 1576 wrote to memory of 1896	1576	cmd.exe	attrib.exe
PID 1576 wrote to memory of 1896	1576	cmd.exe	attrib.exe
PID 1576 wrote to memory of 1896	1576	cmd.exe	attrib.exe
PID 1636 wrote to memory of 1968	1636	cmd.exe	attrib.exe
PID 1636 wrote to memory of 1968	1636	cmd.exe	attrib.exe
PID 1636 wrote to memory of 1968	1636	cmd.exe	attrib.exe
PID 1636 wrote to memory of 1968	1636	cmd.exe	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

1420 vssadmin.exe
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

1500 takeown.exe
1792 icacls.exe
NTFS ADS 1 IoCs

Processes:

Interfaces.bin.exe

description ioc process

File opened for modification C:\Users\Admin\AppData\Roaming\Group:bin Interfaces.bin.exe
WastedLocker
Ransomware family seen in the wild since May 2020.
ransomware wastedlocker
Views/modifies file attributes 1 TTPs 3 IoCs
evasion

Hidden Files and Directories
T1158

Processes:

attrib.exeattrib.exeattrib.exe

pid process

1932 attrib.exe
1896 attrib.exe
1968 attrib.exe
Loads dropped DLL 2 IoCs

Processes:

Interfaces.bin.exe

pid process

608 Interfaces.bin.exe
608 Interfaces.bin.exe
Executes dropped EXE 2 IoCs

Processes:

Group:binGroup.exe

pid process

1184 Group:bin
1768 Group.exe
Deletes itself 1 IoCs

Processes:

cmd.exe

pid process

1636 cmd.exe

pid	process
1420	vssadmin.exe

pid	process
1500	takeown.exe
1792	icacls.exe

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

pid	process
1932	attrib.exe
1896	attrib.exe
1968	attrib.exe

pid	process
608	Interfaces.bin.exe
608	Interfaces.bin.exe

pid	process
1184	Group:bin
1768	Group.exe

pid	process
1636	cmd.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\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

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

File Deletion
T1107

Inhibit System Recovery
T1490

Drops file in System32 directory 2 IoCs

Processes:

Group:binattrib.exe

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

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

Group.exe

description	ioc	process
File opened for modification	C:\Users\Admin\Pictures\ConfirmResume.tif.garminwasted	Group.exe
File created	C:\Users\Admin\Pictures\SkipUpdate.png.garminwasted_info	Group.exe
File renamed	C:\Users\Admin\Pictures\SkipUpdate.png => C:\Users\Admin\Pictures\SkipUpdate.png.garminwasted	Group.exe
File opened for modification	C:\Users\Admin\Pictures\SkipUpdate.png.garminwasted	Group.exe
File created	C:\Users\Admin\Pictures\ConfirmResume.tif.garminwasted_info	Group.exe
File renamed	C:\Users\Admin\Pictures\ConfirmResume.tif => C:\Users\Admin\Pictures\ConfirmResume.tif.garminwasted	Group.exe

C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe
"C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe"
1⤵
- Suspicious use of WriteProcessMemory
- NTFS ADS
- Loads dropped DLL
PID:608

C:\Users\Admin\AppData\Roaming\Group:bin
C:\Users\Admin\AppData\Roaming\Group:bin -r
2⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
- Drops file in System32 directory
PID:1184

C:\Windows\system32\vssadmin.exe
C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
3⤵
- Interacts with shadow copies
PID:1420

C:\Windows\SysWOW64\takeown.exe
C:\Windows\system32\takeown.exe /F C:\Windows\system32\Group.exe
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1500

C:\Windows\SysWOW64\icacls.exe
C:\Windows\system32\icacls.exe C:\Windows\system32\Group.exe /reset
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1792

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Group" & del "C:\Users\Admin\AppData\Roaming\Group"
3⤵
- Suspicious use of WriteProcessMemory
PID:1576

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
4⤵
PID:1568

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Roaming\Group"
4⤵
- Views/modifies file attributes
PID:1896

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe" & del "C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe"
2⤵
- Suspicious use of WriteProcessMemory
- Deletes itself
PID:1636

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:1904

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe"
3⤵
- Views/modifies file attributes
PID:1968

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
- Modifies service
PID:1004

C:\Windows\SysWOW64\Group.exe
C:\Windows\SysWOW64\Group.exe -s
1⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
- Modifies extensions of user files
PID:1768

C:\Windows\SysWOW64\cmd.exe
cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Group.exe" & del "C:\Windows\SysWOW64\Group.exe"
2⤵
- Suspicious use of WriteProcessMemory
PID:1836

C:\Windows\SysWOW64\choice.exe
choice /t 10 /d y
3⤵
PID:1632

C:\Windows\SysWOW64\attrib.exe
attrib -h "C:\Windows\SysWOW64\Group.exe"
3⤵
- Views/modifies file attributes
- Drops file in System32 directory
PID:1932