wastedlocker | 905ea119ad8d3e54cd228c458a1b5681abc1f35df782977a23812ec4efa0288a

Analysis

max time kernel
148s
max time network
63s
platform
windows10_x64
resource
win10v200722
submitted
26/07/2020, 07:45

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General

Target

Interfaces.bin.exe
Size

1.2MB
MD5

2cc4534b0dd0e1c8d5b89644274a10c1
SHA1

735ee2c15c0b7172f65d39f0fd33b9186ee69653
SHA256

905ea119ad8d3e54cd228c458a1b5681abc1f35df782977a23812ec4efa0288a
SHA512

a842b2d171aa6efa1b391d5d0f84663e78021b485555e2bf10a5e589d8652057f5abbd88e1a5ec628b714692ec5d63c3172894aa7846d5897e87d99dad67e2b8

Score

10^/10

persistence ransomware wastedlocker exploit discovery

Malware Config

Signatures

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

Modifies extensions of user files 12 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\ResolveGrant.raw.garminwasted_info	Machine.exe
File renamed	C:\Users\Admin\Pictures\ResolveGrant.raw => C:\Users\Admin\Pictures\ResolveGrant.raw.garminwasted	Machine.exe
File created	C:\Users\Admin\Pictures\SyncDismount.raw.garminwasted_info	Machine.exe
File renamed	C:\Users\Admin\Pictures\SyncDismount.raw => C:\Users\Admin\Pictures\SyncDismount.raw.garminwasted	Machine.exe
File created	C:\Users\Admin\Pictures\FormatMerge.png.garminwasted_info	Machine.exe
File created	C:\Users\Admin\Pictures\GetBlock.crw.garminwasted_info	Machine.exe
File renamed	C:\Users\Admin\Pictures\FormatMerge.png => C:\Users\Admin\Pictures\FormatMerge.png.garminwasted	Machine.exe
File opened for modification	C:\Users\Admin\Pictures\ResolveGrant.raw.garminwasted	Machine.exe
File opened for modification	C:\Users\Admin\Pictures\SyncDismount.raw.garminwasted	Machine.exe
File opened for modification	C:\Users\Admin\Pictures\FormatMerge.png.garminwasted	Machine.exe
File renamed	C:\Users\Admin\Pictures\GetBlock.crw => C:\Users\Admin\Pictures\GetBlock.crw.garminwasted	Machine.exe
File opened for modification	C:\Users\Admin\Pictures\GetBlock.crw.garminwasted	Machine.exe

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
2056	attrib.exe
3136	attrib.exe
3756	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
1272	takeown.exe
1564	icacls.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	388	vssvc.exe
Token: SeRestorePrivilege	388	vssvc.exe
Token: SeAuditPrivilege	388	vssvc.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\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
640	vssadmin.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1272	takeown.exe
1564	icacls.exe

NTFS ADS 1 IoCs

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

Drops file in System32 directory 2 IoCs

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

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 408 wrote to memory of 504	408	Interfaces.bin.exe	67
PID 408 wrote to memory of 504	408	Interfaces.bin.exe	67
PID 408 wrote to memory of 504	408	Interfaces.bin.exe	67
PID 504 wrote to memory of 640	504	Machine:bin	68
PID 504 wrote to memory of 640	504	Machine:bin	68
PID 504 wrote to memory of 1272	504	Machine:bin	72
PID 504 wrote to memory of 1272	504	Machine:bin	72
PID 504 wrote to memory of 1272	504	Machine:bin	72
PID 504 wrote to memory of 1564	504	Machine:bin	74
PID 504 wrote to memory of 1564	504	Machine:bin	74
PID 504 wrote to memory of 1564	504	Machine:bin	74
PID 1780 wrote to memory of 2312	1780	Machine.exe	78
PID 1780 wrote to memory of 2312	1780	Machine.exe	78
PID 1780 wrote to memory of 2312	1780	Machine.exe	78
PID 2312 wrote to memory of 2492	2312	cmd.exe	80
PID 2312 wrote to memory of 2492	2312	cmd.exe	80
PID 2312 wrote to memory of 2492	2312	cmd.exe	80
PID 504 wrote to memory of 2540	504	Machine:bin	81
PID 504 wrote to memory of 2540	504	Machine:bin	81
PID 504 wrote to memory of 2540	504	Machine:bin	81
PID 408 wrote to memory of 2648	408	Interfaces.bin.exe	83
PID 408 wrote to memory of 2648	408	Interfaces.bin.exe	83
PID 408 wrote to memory of 2648	408	Interfaces.bin.exe	83
PID 2540 wrote to memory of 4012	2540	cmd.exe	85
PID 2540 wrote to memory of 4012	2540	cmd.exe	85
PID 2540 wrote to memory of 4012	2540	cmd.exe	85
PID 2648 wrote to memory of 2460	2648	cmd.exe	86
PID 2648 wrote to memory of 2460	2648	cmd.exe	86
PID 2648 wrote to memory of 2460	2648	cmd.exe	86
PID 2312 wrote to memory of 2056	2312	cmd.exe	89
PID 2312 wrote to memory of 2056	2312	cmd.exe	89
PID 2312 wrote to memory of 2056	2312	cmd.exe	89
PID 2540 wrote to memory of 3136	2540	cmd.exe	90
PID 2540 wrote to memory of 3136	2540	cmd.exe	90
PID 2540 wrote to memory of 3136	2540	cmd.exe	90
PID 2648 wrote to memory of 3756	2648	cmd.exe	91
PID 2648 wrote to memory of 3756	2648	cmd.exe	91
PID 2648 wrote to memory of 3756	2648	cmd.exe	91

Executes dropped EXE 2 IoCs

pid	Process
504	Machine:bin
1780	Machine.exe

C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe
"C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:408
- C:\Users\Admin\AppData\Roaming\Machine:bin
  C:\Users\Admin\AppData\Roaming\Machine:bin -r
  2⤵
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  - Executes dropped EXE
  PID:504
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:640
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Machine.exe
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:1272
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Machine.exe /reset
    3⤵
    - Modifies file permissions
    - Possible privilege escalation attempt
    PID:1564
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Machine" & del "C:\Users\Admin\AppData\Roaming\Machine"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:2540
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:4012
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Machine"
      4⤵
      Views/modifies file attributes
      PID:3136
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe" & del "C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2648
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:2460
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\Interfaces.bin.exe"
    3⤵
    - Views/modifies file attributes
    PID:3756

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
- Modifies service
PID:388

C:\Windows\SysWOW64\Machine.exe
C:\Windows\SysWOW64\Machine.exe -s
1⤵
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
- Executes dropped EXE
PID:1780
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Machine.exe" & del "C:\Windows\SysWOW64\Machine.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2312
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:2492
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Machine.exe"
    3⤵
    - Views/modifies file attributes
    - Drops file in System32 directory
    PID:2056

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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