wastedlocker | d5b5a063656f2ce6dc50ed24278a2d21f2bb762c8e65c0d2ffc2477986896acf

Analysis

max time kernel
76s
max time network
112s
platform
windows10_x64
resource
win10v200722
submitted
02-09-2020 18:23

Sharing

Copy URL

Twitter E-mail

Report Analysis Logs

General

Target

Sample_5f2c5184b9ca450019d4b155.false.exe
Size

1.2MB
MD5

72aa9ab7c9d740aa4e1a554fe2e53d53
SHA1

476741067c0a95bf7b4b4589f30f0046cd3a14be
SHA256

d5b5a063656f2ce6dc50ed24278a2d21f2bb762c8e65c0d2ffc2477986896acf
SHA512

1c5440f5f6ac7cb6a489d32c035924e9446e5808b96a7922c249da15070ef3694001d8c09726d521edba5f41cbb5c1564fe122bf1565a80f290f745f3ac660ab

Score

10^/10

persistence exploit ransomware wastedlocker discovery

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
2164	Product:bin
3780	Product.exe

Modifies extensions of user files 3 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File created	C:\Users\Admin\Pictures\SplitMerge.tiff.howto_seccrypt	Product.exe
File renamed	C:\Users\Admin\Pictures\SplitMerge.tiff => C:\Users\Admin\Pictures\SplitMerge.tiff.seccrypt	Product.exe
File opened for modification	C:\Users\Admin\Pictures\SplitMerge.tiff.seccrypt	Product.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
2428	takeown.exe
3004	icacls.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
2428	takeown.exe
3004	icacls.exe

Drops file in System32 directory 2 IoCs

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

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\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

Drops file in Windows directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\ServiceProfiles\LocalService\winhttp\cachev3.dat	svchost.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
1404	vssadmin.exe

Modifies data under HKEY_USERS 5 IoCs

description	ioc	Process
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad	svchost.exe
Key created	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionReason = "1"	svchost.exe
Set value (data)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecisionTime = 1df8066f6681d601	svchost.exe
Set value (int)	\REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Wpad\0e-3e-6f-2c-c8-c7\WpadDecision = "0"	svchost.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Product:bin	Sample_5f2c5184b9ca450019d4b155.false.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeShutdownPrivilege	508	svchost.exe
Token: SeCreatePagefilePrivilege	508	svchost.exe
Token: SeBackupPrivilege	1932	vssvc.exe
Token: SeRestorePrivilege	1932	vssvc.exe
Token: SeAuditPrivilege	1932	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 3888 wrote to memory of 2164	3888	Sample_5f2c5184b9ca450019d4b155.false.exe	72
PID 3888 wrote to memory of 2164	3888	Sample_5f2c5184b9ca450019d4b155.false.exe	72
PID 3888 wrote to memory of 2164	3888	Sample_5f2c5184b9ca450019d4b155.false.exe	72
PID 2164 wrote to memory of 1404	2164	Product:bin	74
PID 2164 wrote to memory of 1404	2164	Product:bin	74
PID 2164 wrote to memory of 2428	2164	Product:bin	79
PID 2164 wrote to memory of 2428	2164	Product:bin	79
PID 2164 wrote to memory of 2428	2164	Product:bin	79
PID 2164 wrote to memory of 3004	2164	Product:bin	81
PID 2164 wrote to memory of 3004	2164	Product:bin	81
PID 2164 wrote to memory of 3004	2164	Product:bin	81
PID 3780 wrote to memory of 932	3780	Product.exe	86
PID 3780 wrote to memory of 932	3780	Product.exe	86
PID 3780 wrote to memory of 932	3780	Product.exe	86
PID 932 wrote to memory of 3480	932	cmd.exe	88
PID 932 wrote to memory of 3480	932	cmd.exe	88
PID 932 wrote to memory of 3480	932	cmd.exe	88
PID 2164 wrote to memory of 4028	2164	Product:bin	89
PID 2164 wrote to memory of 4028	2164	Product:bin	89
PID 2164 wrote to memory of 4028	2164	Product:bin	89
PID 3888 wrote to memory of 752	3888	Sample_5f2c5184b9ca450019d4b155.false.exe	91
PID 3888 wrote to memory of 752	3888	Sample_5f2c5184b9ca450019d4b155.false.exe	91
PID 3888 wrote to memory of 752	3888	Sample_5f2c5184b9ca450019d4b155.false.exe	91
PID 752 wrote to memory of 1280	752	cmd.exe	93
PID 752 wrote to memory of 1280	752	cmd.exe	93
PID 752 wrote to memory of 1280	752	cmd.exe	93
PID 4028 wrote to memory of 1264	4028	cmd.exe	94
PID 4028 wrote to memory of 1264	4028	cmd.exe	94
PID 4028 wrote to memory of 1264	4028	cmd.exe	94
PID 932 wrote to memory of 248	932	cmd.exe	96
PID 932 wrote to memory of 248	932	cmd.exe	96
PID 932 wrote to memory of 248	932	cmd.exe	96
PID 4028 wrote to memory of 268	4028	cmd.exe	97
PID 4028 wrote to memory of 268	4028	cmd.exe	97
PID 4028 wrote to memory of 268	4028	cmd.exe	97
PID 752 wrote to memory of 1716	752	cmd.exe	98
PID 752 wrote to memory of 1716	752	cmd.exe	98
PID 752 wrote to memory of 1716	752	cmd.exe	98

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
248	attrib.exe
268	attrib.exe
1716	attrib.exe

C:\Users\Admin\AppData\Local\Temp\Sample_5f2c5184b9ca450019d4b155.false.exe
"C:\Users\Admin\AppData\Local\Temp\Sample_5f2c5184b9ca450019d4b155.false.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3888
- C:\Users\Admin\AppData\Roaming\Product:bin
  C:\Users\Admin\AppData\Roaming\Product:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2164
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1404
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Product.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:2428
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Product.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:3004
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Product" & del "C:\Users\Admin\AppData\Roaming\Product"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:4028
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:1264
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Product"
      4⤵
      Views/modifies file attributes
      PID:268
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\Sample_5f2c5184b9ca450019d4b155.false.exe" & del "C:\Users\Admin\AppData\Local\Temp\Sample_5f2c5184b9ca450019d4b155.false.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:752
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:1280
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\Sample_5f2c5184b9ca450019d4b155.false.exe"
    3⤵
    - Views/modifies file attributes
    PID:1716

C:\Windows\system32\svchost.exe
C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
1⤵
- Drops file in Windows directory
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:508

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Modifies service
- Suspicious use of AdjustPrivilegeToken
PID:1932

C:\Windows\SysWOW64\Product.exe
C:\Windows\SysWOW64\Product.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:3780
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Product.exe" & del "C:\Windows\SysWOW64\Product.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:932
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:3480
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Product.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:248

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

Replay Monitor

Loading Replay Monitor...

Downloads