wastedlocker | 5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367

Analysis

max time kernel
120s
max time network
127s
platform
windows7_x64
resource
win7
submitted
31-08-2020 18:23

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General

Target

wastlock_1.exe
Size

1.0MB
MD5

572fea5f025df78f2d316216fbeee52e
SHA1

91b2bf44b1f9282c09f07f16631deaa3ad9d956d
SHA256

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367
SHA512

eb238272227c5825477ff1e37dc4f7e467665049d4db5649fff59c39d7745e88b06234d6d1218c05c802e33e21577f9d4a533cb9e23ebe6fb09654f97759c187

Score

10^/10

persistence discovery ransomware wastedlocker exploit

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

pid	Process
1376	Net:bin
864	Name.exe

Modifies extensions of user files 15 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\ConvertFromStop.raw.rlhwasted	Name.exe
File created	C:\Users\Admin\Pictures\InstallDisable.raw.rlhwasted_info	Name.exe
File opened for modification	C:\Users\Admin\Pictures\InstallDisable.raw.rlhwasted	Name.exe
File renamed	C:\Users\Admin\Pictures\RevokeSubmit.crw => C:\Users\Admin\Pictures\RevokeSubmit.crw.rlhwasted	Name.exe
File opened for modification	C:\Users\Admin\Pictures\SkipRemove.png.rlhwasted	Name.exe
File created	C:\Users\Admin\Pictures\UnprotectSwitch.tiff.rlhwasted_info	Name.exe
File created	C:\Users\Admin\Pictures\ConvertFromStop.raw.rlhwasted_info	Name.exe
File renamed	C:\Users\Admin\Pictures\ConvertFromStop.raw => C:\Users\Admin\Pictures\ConvertFromStop.raw.rlhwasted	Name.exe
File renamed	C:\Users\Admin\Pictures\InstallDisable.raw => C:\Users\Admin\Pictures\InstallDisable.raw.rlhwasted	Name.exe
File created	C:\Users\Admin\Pictures\RevokeSubmit.crw.rlhwasted_info	Name.exe
File opened for modification	C:\Users\Admin\Pictures\RevokeSubmit.crw.rlhwasted	Name.exe
File created	C:\Users\Admin\Pictures\SkipRemove.png.rlhwasted_info	Name.exe
File renamed	C:\Users\Admin\Pictures\SkipRemove.png => C:\Users\Admin\Pictures\SkipRemove.png.rlhwasted	Name.exe
File renamed	C:\Users\Admin\Pictures\UnprotectSwitch.tiff => C:\Users\Admin\Pictures\UnprotectSwitch.tiff.rlhwasted	Name.exe
File opened for modification	C:\Users\Admin\Pictures\UnprotectSwitch.tiff.rlhwasted	Name.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1760	takeown.exe
1168	icacls.exe

Deletes itself 1 IoCs

pid	Process
1532	cmd.exe

Loads dropped DLL 2 IoCs

pid	Process
1152	wastlock_1.exe
1152	wastlock_1.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1760	takeown.exe
1168	icacls.exe

Drops file in System32 directory 2 IoCs

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

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

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

pid	Process
1944	vssadmin.exe

NTFS ADS 1 IoCs

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

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1980	vssvc.exe
Token: SeRestorePrivilege	1980	vssvc.exe
Token: SeAuditPrivilege	1980	vssvc.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1152 wrote to memory of 1376	1152	wastlock_1.exe	25
PID 1152 wrote to memory of 1376	1152	wastlock_1.exe	25
PID 1152 wrote to memory of 1376	1152	wastlock_1.exe	25
PID 1152 wrote to memory of 1376	1152	wastlock_1.exe	25
PID 1376 wrote to memory of 1944	1376	Net:bin	26
PID 1376 wrote to memory of 1944	1376	Net:bin	26
PID 1376 wrote to memory of 1944	1376	Net:bin	26
PID 1376 wrote to memory of 1944	1376	Net:bin	26
PID 1376 wrote to memory of 1760	1376	Net:bin	30
PID 1376 wrote to memory of 1760	1376	Net:bin	30
PID 1376 wrote to memory of 1760	1376	Net:bin	30
PID 1376 wrote to memory of 1760	1376	Net:bin	30
PID 1376 wrote to memory of 1168	1376	Net:bin	32
PID 1376 wrote to memory of 1168	1376	Net:bin	32
PID 1376 wrote to memory of 1168	1376	Net:bin	32
PID 1376 wrote to memory of 1168	1376	Net:bin	32
PID 864 wrote to memory of 1496	864	Name.exe	36
PID 864 wrote to memory of 1496	864	Name.exe	36
PID 864 wrote to memory of 1496	864	Name.exe	36
PID 864 wrote to memory of 1496	864	Name.exe	36
PID 1496 wrote to memory of 816	1496	cmd.exe	38
PID 1496 wrote to memory of 816	1496	cmd.exe	38
PID 1496 wrote to memory of 816	1496	cmd.exe	38
PID 1496 wrote to memory of 816	1496	cmd.exe	38
PID 1376 wrote to memory of 524	1376	Net:bin	39
PID 1376 wrote to memory of 524	1376	Net:bin	39
PID 1376 wrote to memory of 524	1376	Net:bin	39
PID 1376 wrote to memory of 524	1376	Net:bin	39
PID 1152 wrote to memory of 1532	1152	wastlock_1.exe	41
PID 1152 wrote to memory of 1532	1152	wastlock_1.exe	41
PID 1152 wrote to memory of 1532	1152	wastlock_1.exe	41
PID 1152 wrote to memory of 1532	1152	wastlock_1.exe	41
PID 524 wrote to memory of 1084	524	cmd.exe	42
PID 524 wrote to memory of 1084	524	cmd.exe	42
PID 524 wrote to memory of 1084	524	cmd.exe	42
PID 524 wrote to memory of 1084	524	cmd.exe	42
PID 1532 wrote to memory of 884	1532	cmd.exe	44
PID 1532 wrote to memory of 884	1532	cmd.exe	44
PID 1532 wrote to memory of 884	1532	cmd.exe	44
PID 1532 wrote to memory of 884	1532	cmd.exe	44
PID 1496 wrote to memory of 276	1496	cmd.exe	48
PID 1496 wrote to memory of 276	1496	cmd.exe	48
PID 1496 wrote to memory of 276	1496	cmd.exe	48
PID 1496 wrote to memory of 276	1496	cmd.exe	48
PID 1532 wrote to memory of 1476	1532	cmd.exe	49
PID 1532 wrote to memory of 1476	1532	cmd.exe	49
PID 1532 wrote to memory of 1476	1532	cmd.exe	49
PID 1532 wrote to memory of 1476	1532	cmd.exe	49
PID 524 wrote to memory of 1564	524	cmd.exe	50
PID 524 wrote to memory of 1564	524	cmd.exe	50
PID 524 wrote to memory of 1564	524	cmd.exe	50
PID 524 wrote to memory of 1564	524	cmd.exe	50

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1476	attrib.exe
1564	attrib.exe
276	attrib.exe

C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe
"C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe"
1⤵
- Loads dropped DLL
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:1152
- 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:1376
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1944
- - 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:1760
- - 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:1168
- - 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:524
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:1084
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Net"
      4⤵
      Views/modifies file attributes
      PID:1564
- 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⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:1532
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:884
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\wastlock_1.exe"
    3⤵
    - Views/modifies file attributes
    PID:1476

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1980

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:864
- 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:1496
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:816
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Name.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:276

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Modify Existing Service

T1031

Privilege Escalation

Defense Evasion

File Deletion

T1107

File and Directory Permissions Modification

T1222

Hidden Files and Directories

T1158

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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