ransomexx_win | 6270fc40abc62bce9c80fa7954547c04229d2cfd885ef1b319f14ab3aca0b6cb

General

Target

4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
Size

156KB
MD5

fcd21c6fca3b9378961aa1865bee7ecb
SHA1

0abaa05da2a05977e0baf68838cff1712f1789e0
SHA256

4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458
SHA512

e39c1f965f6faeaa33dfec6eba23fbfff14b287f4777797ea79480bb037d6d806516bda7046315e051961fce12e935ac546819c1e0bef5c33568d68955a9792a
SSDEEP

1536:7ZLTzASUIG0TOOYTufIaSWvRYkekdvizSBXxNe9VPw6s6aUCT7Q7qn:OBI9HYyfNBdviGBBQsrhPk4

Score

10^/10

ransomexx_win evasion ransomware

Malware Config

Signatures

Deletes NTFS Change Journal 2 TTPs 1 IoCs
The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.
ransomware

Inhibit System Recovery
T1490

Data Destruction
T1485

Processes:

fsutil.exe

pid process

260 fsutil.exe
RansomEXX Ransomware
Targeted ransomware with variants which affect Windows and Linux systems.
ransomware ransomexx_win
Clears Windows event logs 1 TTPs 4 IoCs
evasion ransomware

Indicator Removal on Host
T1070

Processes:

wevtutil.exewevtutil.exewevtutil.exewevtutil.exe

pid process

4276 wevtutil.exe
228 wevtutil.exe
3628 wevtutil.exe
3680 wevtutil.exe
Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
ransomware evasion

Inhibit System Recovery
T1490

Processes:

bcdedit.exebcdedit.exe

pid process

1388 bcdedit.exe
4748 bcdedit.exe
Deletes backup catalog 3 TTPs 1 IoCs
Uses wbadmin.exe to inhibit system recovery.
ransomware

Command-Line Interface
T1059

File Deletion
T1107

Inhibit System Recovery
T1490

Processes:

wbadmin.exe

pid process

4260 wbadmin.exe
Disables use of System Restore points 1 TTPs
evasion

Inhibit System Recovery
T1490

pid	process
260	fsutil.exe

pid	process
4276	wevtutil.exe
228	wevtutil.exe
3628	wevtutil.exe
3680	wevtutil.exe

pid	process
1388	bcdedit.exe
4748	bcdedit.exe

pid	process
4260	wbadmin.exe

Modifies extensions of user files 13 IoCs

Ransomware generally changes the extension on encrypted files.

ransomware

Processes:

4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

description	ioc	process
File renamed	C:\Users\Admin\Pictures\TestEnter.crw => C:\Users\Admin\Pictures\TestEnter.crw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\BackupUnregister.raw => C:\Users\Admin\Pictures\BackupUnregister.raw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\EnterGroup.raw => C:\Users\Admin\Pictures\EnterGroup.raw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\ResumeResize.png => C:\Users\Admin\Pictures\ResumeResize.png.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\RevokeRedo.raw => C:\Users\Admin\Pictures\RevokeRedo.raw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\MergeReceive.raw => C:\Users\Admin\Pictures\MergeReceive.raw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\PingRestore.png => C:\Users\Admin\Pictures\PingRestore.png.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\RedoSplit.crw => C:\Users\Admin\Pictures\RedoSplit.crw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\SaveExit.raw => C:\Users\Admin\Pictures\SaveExit.raw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\ConvertToCompress.tif => C:\Users\Admin\Pictures\ConvertToCompress.tif.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\DebugJoin.raw => C:\Users\Admin\Pictures\DebugJoin.raw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\ImportUndo.png => C:\Users\Admin\Pictures\ImportUndo.png.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
File renamed	C:\Users\Admin\Pictures\InitializeUnlock.crw => C:\Users\Admin\Pictures\InitializeUnlock.crw.txd0t	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

Overwrites deleted data with Cipher tool 1 TTPs
Cipher is a Windows tool which be used to securely wipe deallocated HDD space, preventing recovery of deleted data.
ransomware

Inhibit System Recovery
T1490

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2629973501-4017243118-3254762364-1000\Control Panel\International\Geo\Nation	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

Enumerates connected drives 3 TTPs 1 IoCs
Attempts to read the root path of hard drives other than the default C: drive.

Query Registry
T1012

Peripheral Device Discovery
T1120

System Information Discovery
T1082

Processes:

cipher.exe

description ioc process

File opened (read-only) \??\D: cipher.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082

description	ioc	process
File opened (read-only)	\??\D:	cipher.exe

Checks SCSI registry key(s) 3 TTPs 4 IoCs

SCSI information is often read in order to detect sandboxing environments.

Query Registry

T1012

Peripheral Device Discovery

T1120

System Information Discovery

T1082

Processes:

vds.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_DADY&PROD_DADY_DVD-ROM\4&215468A5&0&010000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_DADY&PROD_HARDDISK\4&215468A5&0&000000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\FriendlyName	vds.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

Processes:

4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

pid	process
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

Processes:

wevtutil.exewevtutil.exewevtutil.exewevtutil.exewevtutil.exewbengine.exe

description	pid	process
Token: SeSecurityPrivilege	3680	wevtutil.exe
Token: SeBackupPrivilege	3680	wevtutil.exe
Token: SeSecurityPrivilege	1692	wevtutil.exe
Token: SeBackupPrivilege	1692	wevtutil.exe
Token: SeSecurityPrivilege	4276	wevtutil.exe
Token: SeBackupPrivilege	4276	wevtutil.exe
Token: SeSecurityPrivilege	3628	wevtutil.exe
Token: SeBackupPrivilege	3628	wevtutil.exe
Token: SeSecurityPrivilege	228	wevtutil.exe
Token: SeBackupPrivilege	228	wevtutil.exe
Token: SeBackupPrivilege	880	wbengine.exe
Token: SeRestorePrivilege	880	wbengine.exe
Token: SeSecurityPrivilege	880	wbengine.exe

Suspicious use of WriteProcessMemory 26 IoCs

Processes:

4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe

description	pid	process	target process
PID 4400 wrote to memory of 260	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	fsutil.exe
PID 4400 wrote to memory of 260	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	fsutil.exe
PID 4400 wrote to memory of 228	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 228	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 928	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	cipher.exe
PID 4400 wrote to memory of 928	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	cipher.exe
PID 4400 wrote to memory of 928	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	cipher.exe
PID 4400 wrote to memory of 788	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	schtasks.exe
PID 4400 wrote to memory of 788	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	schtasks.exe
PID 4400 wrote to memory of 4748	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	bcdedit.exe
PID 4400 wrote to memory of 4748	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	bcdedit.exe
PID 4400 wrote to memory of 3628	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 3628	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 1692	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 1692	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 3680	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 3680	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 1388	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	bcdedit.exe
PID 4400 wrote to memory of 1388	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	bcdedit.exe
PID 4400 wrote to memory of 4276	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 4276	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wevtutil.exe
PID 4400 wrote to memory of 3924	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	cipher.exe
PID 4400 wrote to memory of 3924	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	cipher.exe
PID 4400 wrote to memory of 3924	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	cipher.exe
PID 4400 wrote to memory of 4260	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wbadmin.exe
PID 4400 wrote to memory of 4260	4400	4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe	wbadmin.exe

C:\Users\Admin\AppData\Local\Temp\4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe
"C:\Users\Admin\AppData\Local\Temp\4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458.exe"
1⤵
- Modifies extensions of user files
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:4400
- C:\Windows\System32\fsutil.exe
  "C:\Windows\System32\fsutil.exe" usn deletejournal /D C:
  2⤵
  - Deletes NTFS Change Journal
  PID:260
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Application
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:228
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:D:
  2⤵
  - Enumerates connected drives
  PID:928
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} recoveryenabled no
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:1388
- C:\Windows\System32\wbadmin.exe
  "C:\Windows\System32\wbadmin.exe" delete catalog -quiet
  2⤵
  - Deletes backup catalog
  PID:4260
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:C:
  2⤵
  PID:3924
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" sl Security /e:false
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:1692
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Setup
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:3628
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Security
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:3680
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl System
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:4276
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} bootstatuspolicy ignoreallfailures
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:4748
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable
  2⤵
  PID:788