wastedlocker | ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3

General

Target
ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe
Size 951KB
Sample260812-pderhatwes
SHA256 ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3
MD5 edbf07eaca4fff5f2d3f045567a9dc6f
SHA1 9292fa66c917bfa47e8012d302a69bec48e9b98c
SHA512 731214358d4fcecdafe0d386a305a130185727b20704e6251e37ac5feb35eff8f3f31d8c740954feb57c699cc5975c3bb50fac5c5202c5933c4fe0dfd06bc8e6
SSDEEP 3072:SLu8kCHp4EYPZE5CIv4Nc4GiM9vAZTponZNLQuHmmYxpwbvANK:38Z2E5biM9MTKnXLQuHmmaQvaK
TLSH
T14925BE52A697CCC5FC271470C91B8EF807E2FE46AF491B8B55C0BD7ABD307882B25661
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

cryptone defense_evasion discovery execution exploit wastedlocker impact packer ransomware

Malware Config

Signatures

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

CryptOne packer 1 IoCs

Detects CryptOne packer defined in NCC blogpost.

cryptone packer

resource	yara_rule
behavioral2/files/0x000c00000001c524-5.dat	cryptone

Deletes shadow copies 3 TTPs
Ransomware often targets backup files to inhibit system recovery.
ransomware defense_evasion impact execution

File Deletion
T1070.004

Inhibit System Recovery
T1490

Windows Management Instrumentation
T1047
Renames multiple (168) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
4612	icacls.exe
3340	takeown.exe

Executes dropped EXE 2 IoCs

pid	Process
1352	Net:bin
1784	Server.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
4612	icacls.exe
3340	takeown.exe

Drops file in System32 directory 2 IoCs

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

Executes a command shell one-liner 1 TTPs 3 IoCs

Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

execution

Windows Command Shell

T1059.003

pid	Process
2064	cmd.exe
5208	cmd.exe
4580	cmd.exe

System Location Discovery: System Language Discovery 1 TTPs 14 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	choice.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	icacls.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Server.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	choice.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	choice.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	attrib.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Net:bin
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	takeown.exe

Interacts with shadow copies 3 TTPs 1 IoCs

Shadow copies are often targeted by ransomware to inhibit system recovery.

ransomware

File Deletion

T1070.004

Inhibit System Recovery

T1490

Direct Volume Access

T1006

pid	Process
1376	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Net:bin	ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	2644	vssvc.exe
Token: SeRestorePrivilege	2644	vssvc.exe
Token: SeAuditPrivilege	2644	vssvc.exe

Suspicious use of WriteProcessMemory 13 IoCs

description	pid	Process	procid_target
PID 3760 wrote to memory of 1352	3760	ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe	88
PID 1352 wrote to memory of 1376	1352	Net:bin	89
PID 1352 wrote to memory of 3340	1352	Net:bin	93
PID 1352 wrote to memory of 4612	1352	Net:bin	95
PID 1784 wrote to memory of 2064	1784	Server.exe	99
PID 2064 wrote to memory of 3164	2064	cmd.exe	101
PID 1352 wrote to memory of 5208	1352	Net:bin	102
PID 3760 wrote to memory of 4580	3760	ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe	104
PID 4580 wrote to memory of 3188	4580	cmd.exe	107
PID 5208 wrote to memory of 436	5208	cmd.exe	108
PID 2064 wrote to memory of 4124	2064	cmd.exe	110
PID 4580 wrote to memory of 2408	4580	cmd.exe	111
PID 5208 wrote to memory of 3144	5208	cmd.exe	112

Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
ransomware

Views/modifies file attributes 1 TTPs 3 IoCs

defense_evasion

Hidden Files and Directories

T1564.001

pid	Process
4124	attrib.exe
2408	attrib.exe
3144	attrib.exe

C:\Users\Admin\AppData\Local\Temp\ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe
"C:\Users\Admin\AppData\Local\Temp\ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe"
1⤵
- System Location Discovery: System Language Discovery
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3760
- C:\Users\Admin\AppData\Roaming\Net:bin
  C:\Users\Admin\AppData\Roaming\Net:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1352
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:1376
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Server.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:3340
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Server.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    - System Location Discovery: System Language Discovery
    PID:4612
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Net" & del "C:\Users\Admin\AppData\Roaming\Net"
    3⤵
    - Executes a command shell one-liner
    - System Location Discovery: System Language Discovery
    - Suspicious use of WriteProcessMemory
    PID:5208
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      System Location Discovery: System Language Discovery
      PID:436
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Net"
      4⤵
      System Location Discovery: System Language Discovery
      Views/modifies file attributes
      PID:3144
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe" & del "C:\Users\Admin\AppData\Local\Temp\ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe"
  2⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:4580
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3188
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3.exe"
    3⤵
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:2408

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2644

C:\Windows\SysWOW64\Server.exe
C:\Windows\SysWOW64\Server.exe -s
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
PID:1784
- 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⤵
  - Executes a command shell one-liner
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2064
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    - System Location Discovery: System Language Discovery
    PID:3164
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Server.exe"
    3⤵
    - Drops file in System32 directory
    - System Location Discovery: System Language Discovery
    - Views/modifies file attributes
    PID:4124

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

Windows Command Shell

1

T1059.003

Windows Management Instrumentation

1

T1047

Persistence

Privilege Escalation

Defense Evasion

Direct Volume Access

1

T1006

File and Directory Permissions Modification

1

T1222

Hide Artifacts

1

T1564

Hidden Files and Directories

1

T1564.001

Indicator Removal

2

T1070

File Deletion

2

T1070.004

Credential Access

Discovery

System Location Discovery

1

T1614

System Language Discovery

1

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2

T1490

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Downloads

Net:bin

Path C:\Users\Admin\AppData\Roaming\Net:bin
Size 951KB
SHA256 ed0632acb266a4ec3f51dd803c8025bccd654e53c64eb613e203c590897079b3
MD5 edbf07eaca4fff5f2d3f045567a9dc6f
SHA1 9292fa66c917bfa47e8012d302a69bec48e9b98c
SHA512 731214358d4fcecdafe0d386a305a130185727b20704e6251e37ac5feb35eff8f3f31d8c740954feb57c699cc5975c3bb50fac5c5202c5933c4fe0dfd06bc8e6
SSDEEP 3072:SLu8kCHp4EYPZE5CIv4Nc4GiM9vAZTponZNLQuHmmYxpwbvANK:38Z2E5biM9MTKnXLQuHmmaQvaK
TLSH
T14925BE52A697CCC5FC271470C91B8EF807E2FE46AF491B8B55C0BD7ABD307882B25661
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/1352-186-0x0000000000400000-0x00000000004EF000-memory.dmp

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memory/1784-185-0x0000000000400000-0x00000000004EF000-memory.dmp

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memory/3760-0-0x0000000002110000-0x0000000002120000-memory.dmp

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memory/3760-187-0x0000000000400000-0x00000000004EF000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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