wastedlocker | 5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367

Analysis

max time kernel
274s
max time network
276s
platform
windows10_x64
resource
win10
submitted
13-07-2020 16:49

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General

Target

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
Size

1.0MB
MD5

572fea5f025df78f2d316216fbeee52e
SHA1

91b2bf44b1f9282c09f07f16631deaa3ad9d956d
SHA256

5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367
SHA512

eb238272227c5825477ff1e37dc4f7e467665049d4db5649fff59c39d7745e88b06234d6d1218c05c802e33e21577f9d4a533cb9e23ebe6fb09654f97759c187

Score

10^/10

ransomware discovery exploit wastedlocker persistence

Malware Config

Signatures

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 3544 wrote to memory of 3672	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	67
PID 3544 wrote to memory of 3672	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	67
PID 3544 wrote to memory of 3672	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	67
PID 3672 wrote to memory of 3932	3672	Sc:bin	68
PID 3672 wrote to memory of 3932	3672	Sc:bin	68
PID 3672 wrote to memory of 3972	3672	Sc:bin	72
PID 3672 wrote to memory of 3972	3672	Sc:bin	72
PID 3672 wrote to memory of 3972	3672	Sc:bin	72
PID 3672 wrote to memory of 3444	3672	Sc:bin	74
PID 3672 wrote to memory of 3444	3672	Sc:bin	74
PID 3672 wrote to memory of 3444	3672	Sc:bin	74
PID 1812 wrote to memory of 2828	1812	Lsa.exe	77
PID 1812 wrote to memory of 2828	1812	Lsa.exe	77
PID 1812 wrote to memory of 2828	1812	Lsa.exe	77
PID 2828 wrote to memory of 3056	2828	cmd.exe	79
PID 2828 wrote to memory of 3056	2828	cmd.exe	79
PID 2828 wrote to memory of 3056	2828	cmd.exe	79
PID 3672 wrote to memory of 3264	3672	Sc:bin	81
PID 3672 wrote to memory of 3264	3672	Sc:bin	81
PID 3672 wrote to memory of 3264	3672	Sc:bin	81
PID 3544 wrote to memory of 3240	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	83
PID 3544 wrote to memory of 3240	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	83
PID 3544 wrote to memory of 3240	3544	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe	83
PID 3264 wrote to memory of 3720	3264	cmd.exe	85
PID 3264 wrote to memory of 3720	3264	cmd.exe	85
PID 3264 wrote to memory of 3720	3264	cmd.exe	85
PID 3240 wrote to memory of 520	3240	cmd.exe	86
PID 3240 wrote to memory of 520	3240	cmd.exe	86
PID 3240 wrote to memory of 520	3240	cmd.exe	86
PID 2828 wrote to memory of 636	2828	cmd.exe	87
PID 2828 wrote to memory of 636	2828	cmd.exe	87
PID 2828 wrote to memory of 636	2828	cmd.exe	87
PID 3264 wrote to memory of 808	3264	cmd.exe	88
PID 3264 wrote to memory of 808	3264	cmd.exe	88
PID 3264 wrote to memory of 808	3264	cmd.exe	88
PID 3240 wrote to memory of 912	3240	cmd.exe	89
PID 3240 wrote to memory of 912	3240	cmd.exe	89
PID 3240 wrote to memory of 912	3240	cmd.exe	89

Executes dropped EXE 2 IoCs

pid	Process
3672	Sc:bin
1812	Lsa.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	3812	vssvc.exe
Token: SeRestorePrivilege	3812	vssvc.exe
Token: SeAuditPrivilege	3812	vssvc.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

pid	Process
636	attrib.exe
808	attrib.exe
912	attrib.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Lsa.exe	Sc:bin
File opened for modification	C:\Windows\SysWOW64\Lsa.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 file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
3972	takeown.exe
3444	icacls.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
3972	takeown.exe
3444	icacls.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Sc:bin	5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.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
3932	vssadmin.exe

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\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\Registry Writer	vssvc.exe

C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe
"C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
1⤵
- Suspicious use of WriteProcessMemory
- NTFS ADS
PID:3544
- C:\Users\Admin\AppData\Roaming\Sc:bin
  C:\Users\Admin\AppData\Roaming\Sc:bin -r
  2⤵
  - Suspicious use of WriteProcessMemory
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:3672
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:3932
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Lsa.exe
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:3972
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Lsa.exe /reset
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:3444
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Sc" & del "C:\Users\Admin\AppData\Roaming\Sc"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3264
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:3720
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Sc"
      4⤵
      Views/modifies file attributes
      PID:808
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe" & del "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:3240
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:520
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\5cd04805f9753ca08b82e88c27bf5426d1d356bb26b281885573051048911367.exe"
    3⤵
    - Views/modifies file attributes
    PID:912

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
- Modifies service
PID:3812

C:\Windows\SysWOW64\Lsa.exe
C:\Windows\SysWOW64\Lsa.exe -s
1⤵
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:1812
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Lsa.exe" & del "C:\Windows\SysWOW64\Lsa.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2828
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:3056
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Lsa.exe"
    3⤵
    - Views/modifies file attributes
    - Drops file in System32 directory
    PID:636

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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