wastedlocker | 37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e

Analysis

max time kernel
74s
max time network
146s
platform
windows10_x64
resource
win10v20201028
submitted
03-11-2020 14:20

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General

Target

37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe
Size

58KB
MD5

6d9ad19726c79c0f7b4bf91475452e2d
SHA1

e6d92f05926c01ed146dbfdf02500c234ccf0888
SHA256

37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e
SHA512

87923aeb9b0d409975dd0d364a6c12b57afffde944ccb6707cff134d456f6b8e9c1753b63ff7ffcbc0d389c37a1cff1cadc5075e4ecb503ebcabeb3f631b5eb3

Score

10^/10

wastedlocker discovery exploit persistence ransomware

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
4128	Server:bin
3116	Server.exe

Modifies extensions of user files 6 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\RegisterWrite.raw.garminwasted_info	Server.exe
File renamed	C:\Users\Admin\Pictures\RegisterWrite.raw => C:\Users\Admin\Pictures\RegisterWrite.raw.garminwasted	Server.exe
File opened for modification	C:\Users\Admin\Pictures\RegisterWrite.raw.garminwasted	Server.exe
File created	C:\Users\Admin\Pictures\PingWrite.tiff.garminwasted_info	Server.exe
File renamed	C:\Users\Admin\Pictures\PingWrite.tiff => C:\Users\Admin\Pictures\PingWrite.tiff.garminwasted	Server.exe
File opened for modification	C:\Users\Admin\Pictures\PingWrite.tiff.garminwasted	Server.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
776	takeown.exe
4192	icacls.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
776	takeown.exe
4192	icacls.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Server.exe	Server:bin
File opened for modification	C:\Windows\SysWOW64\Server.exe	attrib.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\Shadow Copy Optimization Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\Registry 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\COM+ REGDB Writer	vssvc.exe
Key created	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\VSS\Diag\ASR 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
1872	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Server:bin	37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	3544	vssvc.exe
Token: SeRestorePrivilege	3544	vssvc.exe
Token: SeAuditPrivilege	3544	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 4704 wrote to memory of 4128	4704	37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe	74
PID 4704 wrote to memory of 4128	4704	37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe	74
PID 4704 wrote to memory of 4128	4704	37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe	74
PID 4128 wrote to memory of 1872	4128	Server:bin	75
PID 4128 wrote to memory of 1872	4128	Server:bin	75
PID 4128 wrote to memory of 776	4128	Server:bin	80
PID 4128 wrote to memory of 776	4128	Server:bin	80
PID 4128 wrote to memory of 776	4128	Server:bin	80
PID 4128 wrote to memory of 4192	4128	Server:bin	82
PID 4128 wrote to memory of 4192	4128	Server:bin	82
PID 4128 wrote to memory of 4192	4128	Server:bin	82
PID 3116 wrote to memory of 2096	3116	Server.exe	85
PID 3116 wrote to memory of 2096	3116	Server.exe	85
PID 3116 wrote to memory of 2096	3116	Server.exe	85
PID 2096 wrote to memory of 4056	2096	cmd.exe	87
PID 2096 wrote to memory of 4056	2096	cmd.exe	87
PID 2096 wrote to memory of 4056	2096	cmd.exe	87
PID 4128 wrote to memory of 3504	4128	Server:bin	88
PID 4128 wrote to memory of 3504	4128	Server:bin	88
PID 4128 wrote to memory of 3504	4128	Server:bin	88
PID 4704 wrote to memory of 2056	4704	37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe	90
PID 4704 wrote to memory of 2056	4704	37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe	90
PID 4704 wrote to memory of 2056	4704	37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe	90
PID 3504 wrote to memory of 4440	3504	cmd.exe	92
PID 3504 wrote to memory of 4440	3504	cmd.exe	92
PID 3504 wrote to memory of 4440	3504	cmd.exe	92
PID 2056 wrote to memory of 4404	2056	cmd.exe	93
PID 2056 wrote to memory of 4404	2056	cmd.exe	93
PID 2056 wrote to memory of 4404	2056	cmd.exe	93
PID 2096 wrote to memory of 672	2096	cmd.exe	97
PID 2096 wrote to memory of 672	2096	cmd.exe	97
PID 2096 wrote to memory of 672	2096	cmd.exe	97
PID 3504 wrote to memory of 884	3504	cmd.exe	98
PID 3504 wrote to memory of 884	3504	cmd.exe	98
PID 3504 wrote to memory of 884	3504	cmd.exe	98
PID 2056 wrote to memory of 1000	2056	cmd.exe	99
PID 2056 wrote to memory of 1000	2056	cmd.exe	99
PID 2056 wrote to memory of 1000	2056	cmd.exe	99

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
884	attrib.exe
1000	attrib.exe
672	attrib.exe

C:\Users\Admin\AppData\Local\Temp\37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe
"C:\Users\Admin\AppData\Local\Temp\37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:4704
- C:\Users\Admin\AppData\Roaming\Server:bin
  C:\Users\Admin\AppData\Roaming\Server:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:4128
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1872
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Server.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:776
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Server.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:4192
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Server" & del "C:\Users\Admin\AppData\Roaming\Server"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3504
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:4440
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Server"
      4⤵
      Views/modifies file attributes
      PID:884
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe" & del "C:\Users\Admin\AppData\Local\Temp\37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2056
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:4404
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\37a30621364d3083424b24b0255fc8f5752d88c381600d840574e551c284fb6e.bin.exe"
    3⤵
    - Views/modifies file attributes
    PID:1000

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:3544

C:\Windows\SysWOW64\Server.exe
C:\Windows\SysWOW64\Server.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:3116
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Server.exe" & del "C:\Windows\SysWOW64\Server.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2096
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:4056
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Server.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:672

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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