wastedlocker | 887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d

Analysis

max time kernel
281s
max time network
282s
platform
windows10_x64
resource
win10
submitted
13-07-2020 16:52

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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

description	pid	Process	procid_target
PID 716 wrote to memory of 336	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	67
PID 716 wrote to memory of 336	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	67
PID 716 wrote to memory of 336	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	67
PID 336 wrote to memory of 364	336	Utilities:bin	68
PID 336 wrote to memory of 364	336	Utilities:bin	68
PID 336 wrote to memory of 3912	336	Utilities:bin	72
PID 336 wrote to memory of 3912	336	Utilities:bin	72
PID 336 wrote to memory of 3912	336	Utilities:bin	72
PID 336 wrote to memory of 3752	336	Utilities:bin	74
PID 336 wrote to memory of 3752	336	Utilities:bin	74
PID 336 wrote to memory of 3752	336	Utilities:bin	74
PID 960 wrote to memory of 3508	960	Utilities.exe	78
PID 960 wrote to memory of 3508	960	Utilities.exe	78
PID 960 wrote to memory of 3508	960	Utilities.exe	78
PID 3508 wrote to memory of 2504	3508	cmd.exe	80
PID 3508 wrote to memory of 2504	3508	cmd.exe	80
PID 3508 wrote to memory of 2504	3508	cmd.exe	80
PID 336 wrote to memory of 2844	336	Utilities:bin	81
PID 336 wrote to memory of 2844	336	Utilities:bin	81
PID 336 wrote to memory of 2844	336	Utilities:bin	81
PID 716 wrote to memory of 1532	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	83
PID 716 wrote to memory of 1532	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	83
PID 716 wrote to memory of 1532	716	887aac61771af200f7e58bf0d02cb96d9befa11deda4e448f0a700ccb186ce9d.exe	83
PID 2844 wrote to memory of 3652	2844	cmd.exe	85
PID 2844 wrote to memory of 3652	2844	cmd.exe	85
PID 2844 wrote to memory of 3652	2844	cmd.exe	85
PID 1532 wrote to memory of 980	1532	cmd.exe	86
PID 1532 wrote to memory of 980	1532	cmd.exe	86
PID 1532 wrote to memory of 980	1532	cmd.exe	86
PID 3508 wrote to memory of 236	3508	cmd.exe	87
PID 3508 wrote to memory of 236	3508	cmd.exe	87
PID 3508 wrote to memory of 236	3508	cmd.exe	87
PID 2844 wrote to memory of 256	2844	cmd.exe	88
PID 2844 wrote to memory of 256	2844	cmd.exe	88
PID 2844 wrote to memory of 256	2844	cmd.exe	88
PID 1532 wrote to memory of 3676	1532	cmd.exe	89
PID 1532 wrote to memory of 3676	1532	cmd.exe	89
PID 1532 wrote to memory of 3676	1532	cmd.exe	89

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

Drops file in System32 directory 2 IoCs

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

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

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

Executes dropped EXE 2 IoCs

pid	Process
336	Utilities:bin
960	Utilities.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

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 and Directory Permissions Modification

T1222

pid	Process
3752	icacls.exe
3912	takeown.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
3912	takeown.exe
3752	icacls.exe

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

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

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

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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