ransomexx_win | c5741701b3866459dd1ffa2477cfd8776713612912693a5897f78aac795d23e9

max time kernel
101s
max time network
105s
platform
windows11-21h2_x64
resource
win11-20250313-en
resource tags

arch:x64arch:x86image:win11-20250313-enlocale:en-usos:windows11-21h2-x64system
submitted
25/03/2025, 15:01

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General

Target
RansomwareSamples/RansomEXX_14_12_2020_156KB.exe
Size 156KB
Sample250325-sd5jpsxyct
SHA256 4cae449450c07b7aa74314173c7b00d409eabfe22b86859f3b3acedd66010458
MD5 fcd21c6fca3b9378961aa1865bee7ecb
SHA1 0abaa05da2a05977e0baf68838cff1712f1789e0
SHA512 e39c1f965f6faeaa33dfec6eba23fbfff14b287f4777797ea79480bb037d6d806516bda7046315e051961fce12e935ac546819c1e0bef5c33568d68955a9792a
SSDEEP 1536:7ZLTzASUIG0TOOYTufIaSWvRYkekdvizSBXxNe9VPw6s6aUCT7Q7qn:OBI9HYyfNBdviGBBQsrhPk4
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

ransomexx_win defense_evasion discovery 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

pid	Process
1696	fsutil.exe

RansomEXX Ransomware
Targeted ransomware with variants which affect Windows and Linux systems.
ransomware ransomexx_win
Ransomexx_win family
ransomexx_win

Clears Windows event logs 1 TTPs 4 IoCs

defense_evasion ransomware

Clear Windows Event Logs

T1070.001

pid	Process
3620	wevtutil.exe
2360	wevtutil.exe
1544	wevtutil.exe
4008	wevtutil.exe

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
3464	bcdedit.exe
1896	bcdedit.exe

Renames multiple (203) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
ransomware

Deletes backup catalog 3 TTPs 1 IoCs

Uses wbadmin.exe to inhibit system recovery.

ransomware

Command and Scripting Interpreter

T1059

File Deletion

T1070.004

Inhibit System Recovery

T1490

pid	Process
2016	wbadmin.exe

Disables use of System Restore points 1 TTPs
defense_evasion

Inhibit System Recovery
T1490
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

Enumerates connected drives 3 TTPs 2 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

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

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 4 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	RansomEXX_14_12_2020_156KB.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cipher.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cipher.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	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

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\DISK&VEN_WDC&PROD_WDS100T2B0A\4&215468A5&0&000000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_WDC&Prod_WDS100T2B0A\4&215468a5&0&000000\FriendlyName	vds.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CDROM&VEN_QEMU&PROD_QEMU_DVD-ROM\4&215468A5&0&010000	vds.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_QEMU&Prod_QEMU_DVD-ROM\4&215468a5&0&010000\FriendlyName	vds.exe

Suspicious behavior: EnumeratesProcesses 25 IoCs

pid	Process
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe
3204	RansomEXX_14_12_2020_156KB.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeSecurityPrivilege	1544	wevtutil.exe
Token: SeBackupPrivilege	1544	wevtutil.exe
Token: SeSecurityPrivilege	4008	wevtutil.exe
Token: SeBackupPrivilege	4008	wevtutil.exe
Token: SeSecurityPrivilege	2360	wevtutil.exe
Token: SeBackupPrivilege	2360	wevtutil.exe
Token: SeSecurityPrivilege	552	wevtutil.exe
Token: SeBackupPrivilege	552	wevtutil.exe
Token: SeSecurityPrivilege	3620	wevtutil.exe
Token: SeBackupPrivilege	3620	wevtutil.exe
Token: SeBackupPrivilege	1588	wbengine.exe
Token: SeRestorePrivilege	1588	wbengine.exe
Token: SeSecurityPrivilege	1588	wbengine.exe

Suspicious use of WriteProcessMemory 29 IoCs

description	pid	Process	procid_target
PID 3204 wrote to memory of 1696	3204	RansomEXX_14_12_2020_156KB.exe	84
PID 3204 wrote to memory of 1696	3204	RansomEXX_14_12_2020_156KB.exe	84
PID 3204 wrote to memory of 3644	3204	RansomEXX_14_12_2020_156KB.exe	86
PID 3204 wrote to memory of 3644	3204	RansomEXX_14_12_2020_156KB.exe	86
PID 3204 wrote to memory of 1896	3204	RansomEXX_14_12_2020_156KB.exe	85
PID 3204 wrote to memory of 1896	3204	RansomEXX_14_12_2020_156KB.exe	85
PID 3204 wrote to memory of 1544	3204	RansomEXX_14_12_2020_156KB.exe	87
PID 3204 wrote to memory of 1544	3204	RansomEXX_14_12_2020_156KB.exe	87
PID 3204 wrote to memory of 2324	3204	RansomEXX_14_12_2020_156KB.exe	88
PID 3204 wrote to memory of 2324	3204	RansomEXX_14_12_2020_156KB.exe	88
PID 3204 wrote to memory of 2324	3204	RansomEXX_14_12_2020_156KB.exe	88
PID 3204 wrote to memory of 3464	3204	RansomEXX_14_12_2020_156KB.exe	89
PID 3204 wrote to memory of 3464	3204	RansomEXX_14_12_2020_156KB.exe	89
PID 3204 wrote to memory of 2360	3204	RansomEXX_14_12_2020_156KB.exe	90
PID 3204 wrote to memory of 2360	3204	RansomEXX_14_12_2020_156KB.exe	90
PID 3204 wrote to memory of 2304	3204	RansomEXX_14_12_2020_156KB.exe	91
PID 3204 wrote to memory of 2304	3204	RansomEXX_14_12_2020_156KB.exe	91
PID 3204 wrote to memory of 2304	3204	RansomEXX_14_12_2020_156KB.exe	91
PID 3204 wrote to memory of 552	3204	RansomEXX_14_12_2020_156KB.exe	92
PID 3204 wrote to memory of 552	3204	RansomEXX_14_12_2020_156KB.exe	92
PID 3204 wrote to memory of 3620	3204	RansomEXX_14_12_2020_156KB.exe	93
PID 3204 wrote to memory of 3620	3204	RansomEXX_14_12_2020_156KB.exe	93
PID 3204 wrote to memory of 5052	3204	RansomEXX_14_12_2020_156KB.exe	96
PID 3204 wrote to memory of 5052	3204	RansomEXX_14_12_2020_156KB.exe	96
PID 3204 wrote to memory of 5052	3204	RansomEXX_14_12_2020_156KB.exe	96
PID 3204 wrote to memory of 4008	3204	RansomEXX_14_12_2020_156KB.exe	95
PID 3204 wrote to memory of 4008	3204	RansomEXX_14_12_2020_156KB.exe	95
PID 3204 wrote to memory of 2016	3204	RansomEXX_14_12_2020_156KB.exe	94
PID 3204 wrote to memory of 2016	3204	RansomEXX_14_12_2020_156KB.exe	94

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\RansomEXX_14_12_2020_156KB.exe
C:\Users\Admin\AppData\Local\Temp\RansomwareSamples\RansomEXX_14_12_2020_156KB.exe bcdedit /set shutdown /r /f /t 2
1⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
PID:3204
- C:\Windows\System32\fsutil.exe
  "C:\Windows\System32\fsutil.exe" usn deletejournal /D C:
  2⤵
  - Deletes NTFS Change Journal
  PID:1696
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} recoveryenabled no
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:1896
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable
  2⤵
  PID:3644
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Setup
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:1544
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:C:
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2324
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} bootstatuspolicy ignoreallfailures
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:3464
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl System
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:2360
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:D:
  2⤵
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  PID:2304
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" sl Security /e:false
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:552
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Security
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:3620
- C:\Windows\System32\wbadmin.exe
  "C:\Windows\System32\wbadmin.exe" delete catalog -quiet
  2⤵
  - Deletes backup catalog
  PID:2016
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Application
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:4008
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:F:
  2⤵
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  PID:5052

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:1588

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:4680

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
- Checks SCSI registry key(s)
PID:2104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

Persistence

Privilege Escalation

Defense Evasion

Indicator Removal

T1070

Clear Windows Event Logs

T1070.001

File Deletion

T1070.004

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Destruction

T1485

Inhibit System Recovery

T1490

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Downloads

!TXDOT_READ_ME!.txt

Path C:\Users\Admin\Desktop\!TXDOT_READ_ME!.txt
Size 1KB
SHA256 4fadb9b629e3d1c290aef74c69e172abf9184d2bd5568ad4e3612370d6235563
MD5 4f8cc0ec3b5be13683db70ad25e526a1
SHA1 8b9259e90096d3db005dc62f6dfa98d6f3866b30
SHA512 2fc2421a772597d7f424522f1f9d8a419d5f770915647b72cd974ac0140955bfc2d00da2df82be2ad55fb044873acd950364e6aa232f28794e5bf7d202ced703
MD5 SHA1 SHA512

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