wastedlocker | ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518

Analysis

max time kernel
130s
max time network
132s
platform
windows10_x64
resource
win10v20210410
submitted
04-05-2021 23:44

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General

Target

ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe
Size

113KB
MD5

0332ce73221dc1b6d26b5f5fa0f06318
SHA1

872e61c0a08c9dea4388d5c897b3d7ed3e8c13b7
SHA256

ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518
SHA512

71482a7798e70ab8176d88e3bfaec0c823118aa19c21b7afdb69f5fd031a91fef4e3d04a05c0ac0752df5904be32e6a9895448f62ee23b015f5e563c29385702

Score

10^/10

wastedlocker cryptone discovery exploit packer ransomware

Malware Config

Signatures

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

CryptOne packer 4 IoCs

Detects CryptOne packer defined in NCC blogpost.

cryptone packer

resource	yara_rule
behavioral2/files/0x000100000001ab59-117.dat	cryptone
behavioral2/files/0x000100000001ab59-118.dat	cryptone
behavioral2/files/0x00030000000152fa-121.dat	cryptone
behavioral2/files/0x00030000000152fa-123.dat	cryptone

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
2448	Remote:bin
3292	Remote.exe

Modifies extensions of user files 21 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

description	ioc	Process
File renamed	C:\Users\Admin\Pictures\RenameJoin.tif => C:\Users\Admin\Pictures\RenameJoin.tif.saverswasted	Remote.exe
File renamed	C:\Users\Admin\Pictures\SyncClear.tif => C:\Users\Admin\Pictures\SyncClear.tif.saverswasted	Remote.exe
File opened for modification	C:\Users\Admin\Pictures\InitializeExit.crw.saverswasted	Remote.exe
File opened for modification	C:\Users\Admin\Pictures\OutStep.png.saverswasted	Remote.exe
File opened for modification	C:\Users\Admin\Pictures\RenameJoin.tif.saverswasted	Remote.exe
File created	C:\Users\Admin\Pictures\SyncClear.tif.saverswasted_info	Remote.exe
File opened for modification	C:\Users\Admin\Pictures\SubmitUnpublish.tiff.saverswasted	Remote.exe
File opened for modification	C:\Users\Admin\Pictures\SyncClear.tif.saverswasted	Remote.exe
File renamed	C:\Users\Admin\Pictures\EnableHide.tiff => C:\Users\Admin\Pictures\EnableHide.tiff.saverswasted	Remote.exe
File opened for modification	C:\Users\Admin\Pictures\EnableHide.tiff.saverswasted	Remote.exe
File created	C:\Users\Admin\Pictures\InitializeExit.crw.saverswasted_info	Remote.exe
File created	C:\Users\Admin\Pictures\OutStep.png.saverswasted_info	Remote.exe
File renamed	C:\Users\Admin\Pictures\OutStep.png => C:\Users\Admin\Pictures\OutStep.png.saverswasted	Remote.exe
File created	C:\Users\Admin\Pictures\SetUse.tiff.saverswasted_info	Remote.exe
File renamed	C:\Users\Admin\Pictures\SetUse.tiff => C:\Users\Admin\Pictures\SetUse.tiff.saverswasted	Remote.exe
File opened for modification	C:\Users\Admin\Pictures\SetUse.tiff.saverswasted	Remote.exe
File created	C:\Users\Admin\Pictures\EnableHide.tiff.saverswasted_info	Remote.exe
File renamed	C:\Users\Admin\Pictures\SubmitUnpublish.tiff => C:\Users\Admin\Pictures\SubmitUnpublish.tiff.saverswasted	Remote.exe
File created	C:\Users\Admin\Pictures\RenameJoin.tif.saverswasted_info	Remote.exe
File created	C:\Users\Admin\Pictures\SubmitUnpublish.tiff.saverswasted_info	Remote.exe
File renamed	C:\Users\Admin\Pictures\InitializeExit.crw => C:\Users\Admin\Pictures\InitializeExit.crw.saverswasted	Remote.exe

Possible privilege escalation attempt 2 IoCs

exploit

pid	Process
1332	takeown.exe
2184	icacls.exe

Modifies file permissions 1 TTPs 2 IoCs

discovery

File and Directory Permissions Modification

T1222

pid	Process
1332	takeown.exe
2184	icacls.exe

Drops file in System32 directory 2 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\Remote.exe	Remote:bin
File opened for modification	C:\Windows\SysWOW64\Remote.exe	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
2728	vssadmin.exe

NTFS ADS 1 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Remote:bin	ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeBackupPrivilege	1940	vssvc.exe
Token: SeRestorePrivilege	1940	vssvc.exe
Token: SeAuditPrivilege	1940	vssvc.exe

Suspicious use of WriteProcessMemory 38 IoCs

description	pid	Process	procid_target
PID 3180 wrote to memory of 2448	3180	ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe	76
PID 3180 wrote to memory of 2448	3180	ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe	76
PID 3180 wrote to memory of 2448	3180	ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe	76
PID 2448 wrote to memory of 2728	2448	Remote:bin	77
PID 2448 wrote to memory of 2728	2448	Remote:bin	77
PID 2448 wrote to memory of 1332	2448	Remote:bin	81
PID 2448 wrote to memory of 1332	2448	Remote:bin	81
PID 2448 wrote to memory of 1332	2448	Remote:bin	81
PID 2448 wrote to memory of 2184	2448	Remote:bin	83
PID 2448 wrote to memory of 2184	2448	Remote:bin	83
PID 2448 wrote to memory of 2184	2448	Remote:bin	83
PID 3292 wrote to memory of 4080	3292	Remote.exe	89
PID 3292 wrote to memory of 4080	3292	Remote.exe	89
PID 3292 wrote to memory of 4080	3292	Remote.exe	89
PID 4080 wrote to memory of 268	4080	cmd.exe	91
PID 4080 wrote to memory of 268	4080	cmd.exe	91
PID 4080 wrote to memory of 268	4080	cmd.exe	91
PID 2448 wrote to memory of 3528	2448	Remote:bin	92
PID 2448 wrote to memory of 3528	2448	Remote:bin	92
PID 2448 wrote to memory of 3528	2448	Remote:bin	92
PID 3180 wrote to memory of 2708	3180	ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe	94
PID 3180 wrote to memory of 2708	3180	ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe	94
PID 3180 wrote to memory of 2708	3180	ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe	94
PID 3528 wrote to memory of 2180	3528	cmd.exe	97
PID 3528 wrote to memory of 2180	3528	cmd.exe	97
PID 3528 wrote to memory of 2180	3528	cmd.exe	97
PID 2708 wrote to memory of 3048	2708	cmd.exe	98
PID 2708 wrote to memory of 3048	2708	cmd.exe	98
PID 2708 wrote to memory of 3048	2708	cmd.exe	98
PID 4080 wrote to memory of 1376	4080	cmd.exe	99
PID 4080 wrote to memory of 1376	4080	cmd.exe	99
PID 4080 wrote to memory of 1376	4080	cmd.exe	99
PID 3528 wrote to memory of 1916	3528	cmd.exe	100
PID 3528 wrote to memory of 1916	3528	cmd.exe	100
PID 3528 wrote to memory of 1916	3528	cmd.exe	100
PID 2708 wrote to memory of 3852	2708	cmd.exe	101
PID 2708 wrote to memory of 3852	2708	cmd.exe	101
PID 2708 wrote to memory of 3852	2708	cmd.exe	101

Views/modifies file attributes 1 TTPs 3 IoCs

evasion

Hidden Files and Directories

T1158

pid	Process
1376	attrib.exe
1916	attrib.exe
3852	attrib.exe

C:\Users\Admin\AppData\Local\Temp\ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe
"C:\Users\Admin\AppData\Local\Temp\ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe"
1⤵
- NTFS ADS
- Suspicious use of WriteProcessMemory
PID:3180
- C:\Users\Admin\AppData\Roaming\Remote:bin
  C:\Users\Admin\AppData\Roaming\Remote:bin -r
  2⤵
  - Executes dropped EXE
  - Drops file in System32 directory
  - Suspicious use of WriteProcessMemory
  PID:2448
- - C:\Windows\system32\vssadmin.exe
    C:\Windows\system32\vssadmin.exe Delete Shadows /All /Quiet
    3⤵
    - Interacts with shadow copies
    PID:2728
- - C:\Windows\SysWOW64\takeown.exe
    C:\Windows\system32\takeown.exe /F C:\Windows\system32\Remote.exe
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:1332
- - C:\Windows\SysWOW64\icacls.exe
    C:\Windows\system32\icacls.exe C:\Windows\system32\Remote.exe /reset
    3⤵
    - Possible privilege escalation attempt
    - Modifies file permissions
    PID:2184
- - C:\Windows\SysWOW64\cmd.exe
    cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Roaming\Remote" & del "C:\Users\Admin\AppData\Roaming\Remote"
    3⤵
    - Suspicious use of WriteProcessMemory
    PID:3528
  - - C:\Windows\SysWOW64\choice.exe
      choice /t 10 /d y
      4⤵
      PID:2180
  - - C:\Windows\SysWOW64\attrib.exe
      attrib -h "C:\Users\Admin\AppData\Roaming\Remote"
      4⤵
      Views/modifies file attributes
      PID:1916
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Users\Admin\AppData\Local\Temp\ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe" & del "C:\Users\Admin\AppData\Local\Temp\ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:2708
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:3048
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Users\Admin\AppData\Local\Temp\ef6b588a8b3d3ca409eb2ac15b38bfedcaf9f6bcede91e38b15ae6ba2ef9e518.exe"
    3⤵
    - Views/modifies file attributes
    PID:3852

C:\Windows\system32\vssvc.exe
C:\Windows\system32\vssvc.exe
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1940

C:\Windows\SysWOW64\Remote.exe
C:\Windows\SysWOW64\Remote.exe -s
1⤵
- Executes dropped EXE
- Modifies extensions of user files
- Suspicious use of WriteProcessMemory
PID:3292
- C:\Windows\SysWOW64\cmd.exe
  cmd /c choice /t 10 /d y & attrib -h "C:\Windows\SysWOW64\Remote.exe" & del "C:\Windows\SysWOW64\Remote.exe"
  2⤵
  - Suspicious use of WriteProcessMemory
  PID:4080
- - C:\Windows\SysWOW64\choice.exe
    choice /t 10 /d y
    3⤵
    PID:268
- - C:\Windows\SysWOW64\attrib.exe
    attrib -h "C:\Windows\SysWOW64\Remote.exe"
    3⤵
    - Drops file in System32 directory
    - Views/modifies file attributes
    PID:1376

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Hidden Files and Directories

T1158

Privilege Escalation

Defense Evasion

File Deletion

T1107

File and Directory Permissions Modification

T1222

Hidden Files and Directories

T1158

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Inhibit System Recovery

T1490

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Downloads

memory/2448-125-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/2448-124-0x0000000002020000-0x0000000002032000-memory.dmp

Filesize
72KB

Download
memory/3180-114-0x0000000000420000-0x00000000004CE000-memory.dmp

Filesize
696KB

Download
memory/3180-115-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download
memory/3292-127-0x0000000000400000-0x000000000041E000-memory.dmp

Filesize
120KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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Downloads