wastedlocker | 0e061255b12ade5dc10f4ad9aeca9ebe5496d28ed251acb376c66c1d9f405821

Analysis

max time kernel
146s
max time network
6s
platform
windows7_x64
resource
win7v200722
submitted
01-08-2020 09:49

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General

Target

lock.exe
Size

112KB
MD5

d01fc079881dc0d33a88e4f8df1ae7ce
SHA1

c40c8848808da12ef78c68de1e6477b862161a43
SHA256

0e061255b12ade5dc10f4ad9aeca9ebe5496d28ed251acb376c66c1d9f405821
SHA512

83bca79d1f0ac14c6d79685fd192964e7117e8c9c734036abddfdbb068c801ff38027a0812a2499e1d9e528a47af07150cafee27384b5a78b8fc32c23bd21130

Score

10^/10

persistence exploit ransomware wastedlocker discovery

Malware Config

Signatures

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1820	takeown.exe
1832	icacls.exe

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1912	attrib.exe
1892	attrib.exe
1932	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
836	vssadmin.exe

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File opened for modification	C:\Users\Admin\Pictures\UnlockRead.png.tcwwasted	Query.exe
File created	C:\Users\Admin\Pictures\EditConvertTo.raw.tcwwasted_info	Query.exe
File renamed	C:\Users\Admin\Pictures\EditConvertTo.raw => C:\Users\Admin\Pictures\EditConvertTo.raw.tcwwasted	Query.exe
File opened for modification	C:\Users\Admin\Pictures\EditConvertTo.raw.tcwwasted	Query.exe
File created	C:\Users\Admin\Pictures\UnlockRead.png.tcwwasted_info	Query.exe
File renamed	C:\Users\Admin\Pictures\UnlockRead.png => C:\Users\Admin\Pictures\UnlockRead.png.tcwwasted	Query.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 1424 wrote to memory of 1464	1424	lock.exe	24
PID 1424 wrote to memory of 1464	1424	lock.exe	24
PID 1424 wrote to memory of 1464	1424	lock.exe	24
PID 1424 wrote to memory of 1464	1424	lock.exe	24
PID 1464 wrote to memory of 836	1464	Query:bin	25
PID 1464 wrote to memory of 836	1464	Query:bin	25
PID 1464 wrote to memory of 836	1464	Query:bin	25
PID 1464 wrote to memory of 836	1464	Query:bin	25
PID 1464 wrote to memory of 1820	1464	Query:bin	29
PID 1464 wrote to memory of 1820	1464	Query:bin	29
PID 1464 wrote to memory of 1820	1464	Query:bin	29
PID 1464 wrote to memory of 1820	1464	Query:bin	29
PID 1464 wrote to memory of 1832	1464	Query:bin	31
PID 1464 wrote to memory of 1832	1464	Query:bin	31
PID 1464 wrote to memory of 1832	1464	Query:bin	31
PID 1464 wrote to memory of 1832	1464	Query:bin	31
PID 1784 wrote to memory of 984	1784	Query.exe	35
PID 1784 wrote to memory of 984	1784	Query.exe	35
PID 1784 wrote to memory of 984	1784	Query.exe	35
PID 1784 wrote to memory of 984	1784	Query.exe	35
PID 984 wrote to memory of 1316	984	cmd.exe	37
PID 984 wrote to memory of 1316	984	cmd.exe	37
PID 984 wrote to memory of 1316	984	cmd.exe	37
PID 984 wrote to memory of 1316	984	cmd.exe	37
PID 1464 wrote to memory of 876	1464	Query:bin	38
PID 1464 wrote to memory of 876	1464	Query:bin	38
PID 1464 wrote to memory of 876	1464	Query:bin	38
PID 1464 wrote to memory of 876	1464	Query:bin	38
PID 1424 wrote to memory of 1516	1424	lock.exe	39
PID 1424 wrote to memory of 1516	1424	lock.exe	39
PID 1424 wrote to memory of 1516	1424	lock.exe	39
PID 1424 wrote to memory of 1516	1424	lock.exe	39
PID 876 wrote to memory of 1580	876	cmd.exe	42
PID 876 wrote to memory of 1580	876	cmd.exe	42
PID 876 wrote to memory of 1580	876	cmd.exe	42
PID 876 wrote to memory of 1580	876	cmd.exe	42
PID 1516 wrote to memory of 1584	1516	cmd.exe	43
PID 1516 wrote to memory of 1584	1516	cmd.exe	43
PID 1516 wrote to memory of 1584	1516	cmd.exe	43
PID 1516 wrote to memory of 1584	1516	cmd.exe	43
PID 876 wrote to memory of 1892	876	cmd.exe	45
PID 876 wrote to memory of 1892	876	cmd.exe	45
PID 876 wrote to memory of 1892	876	cmd.exe	45
PID 876 wrote to memory of 1892	876	cmd.exe	45
PID 1516 wrote to memory of 1932	1516	cmd.exe	46
PID 1516 wrote to memory of 1932	1516	cmd.exe	46
PID 1516 wrote to memory of 1932	1516	cmd.exe	46
PID 1516 wrote to memory of 1932	1516	cmd.exe	46
PID 984 wrote to memory of 1912	984	cmd.exe	44
PID 984 wrote to memory of 1912	984	cmd.exe	44
PID 984 wrote to memory of 1912	984	cmd.exe	44
PID 984 wrote to memory of 1912	984	cmd.exe	44

Executes dropped EXE 2 IoCs

pid	Process
1464	Query:bin
1784	Query.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\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\SwProvider_{b5946137-7b9f-4925-af80-51abd60b20d5}	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry Writer	vssvc.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Query.exe	Query:bin
File opened for modification	C:\Windows\SysWOW64\Query.exe	attrib.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1820	takeown.exe
1832	icacls.exe

Loads dropped DLL 2 IoCs

pid	Process
1424	lock.exe
1424	lock.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1008	vssvc.exe
Token: SeRestorePrivilege	1008	vssvc.exe
Token: SeAuditPrivilege	1008	vssvc.exe

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

Deletes itself 1 IoCs

pid	Process
1516	cmd.exe

NTFS ADS 1 IoCs

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

C:\Users\Admin\AppData\Local\Temp\lock.exe
"C:\Users\Admin\AppData\Local\Temp\lock.exe"
1⤵
- Suspicious use of WriteProcessMemory
- Loads dropped DLL
- NTFS ADS
PID:1424
- C:\Users\Admin\AppData\Roaming\Query:bin
  C:\Users\Admin\AppData\Roaming\Query:bin -r
  2⤵
  - Suspicious use of WriteProcessMemory
  - Executes dropped EXE
  - Drops file in System32 directory
  PID:1464
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:836
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Query.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1820
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Query.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1832
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Query" & del "C:\Users\Admin\AppData\Roaming\Query"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:876
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:1580
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Query"
      4⤵
      Views/modifies file attributes
      PID:1892
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\lock.exe" & del "C:\Users\Admin\AppData\Local\Temp\lock.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  - Deletes itself
  PID:1516
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1584
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\lock.exe"
    3⤵
    - Views/modifies file attributes
    PID:1932

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1008

C:\Windows\SysWOW64\Query.exe
C:\Windows\SysWOW64\Query.exe -s
1⤵
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:1784
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Query.exe" & del "C:\Windows\SysWOW64\Query.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:984
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1316
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Query.exe"
    3⤵
    - Views/modifies file attributes
    - Drops file in System32 directory
    PID:1912

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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