ransomexx_win | c5741701b3866459dd1ffa2477cfd8776713612912693a5897f78aac795d23e9

max time kernel
117s
max time network
19s
platform
windows7_x64
resource
win7-20240903-en
resource tags

arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-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
3052	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
684	wevtutil.exe
1560	wevtutil.exe
2124	wevtutil.exe
2428	wevtutil.exe

Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs

ransomware evasion

Inhibit System Recovery

T1490

pid	Process
1956	bcdedit.exe
2632	bcdedit.exe

Renames multiple (278) 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
1996	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)	\??\F:	cipher.exe
File opened (read-only)	\??\D:	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	cipher.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	RansomEXX_14_12_2020_156KB.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2704	RansomEXX_14_12_2020_156KB.exe
2704	RansomEXX_14_12_2020_156KB.exe
2704	RansomEXX_14_12_2020_156KB.exe
2704	RansomEXX_14_12_2020_156KB.exe
2704	RansomEXX_14_12_2020_156KB.exe
2704	RansomEXX_14_12_2020_156KB.exe
2704	RansomEXX_14_12_2020_156KB.exe
2704	RansomEXX_14_12_2020_156KB.exe
2704	RansomEXX_14_12_2020_156KB.exe

Suspicious use of AdjustPrivilegeToken 13 IoCs

description	pid	Process
Token: SeSecurityPrivilege	684	wevtutil.exe
Token: SeSecurityPrivilege	2124	wevtutil.exe
Token: SeBackupPrivilege	684	wevtutil.exe
Token: SeBackupPrivilege	2124	wevtutil.exe
Token: SeSecurityPrivilege	2428	wevtutil.exe
Token: SeBackupPrivilege	2428	wevtutil.exe
Token: SeSecurityPrivilege	1560	wevtutil.exe
Token: SeBackupPrivilege	1560	wevtutil.exe
Token: SeSecurityPrivilege	2312	wevtutil.exe
Token: SeBackupPrivilege	2312	wevtutil.exe
Token: SeBackupPrivilege	2804	wbengine.exe
Token: SeRestorePrivilege	2804	wbengine.exe
Token: SeSecurityPrivilege	2804	wbengine.exe

Suspicious use of WriteProcessMemory 52 IoCs

description	pid	Process	procid_target
PID 2704 wrote to memory of 1184	2704	RansomEXX_14_12_2020_156KB.exe	32
PID 2704 wrote to memory of 1184	2704	RansomEXX_14_12_2020_156KB.exe	32
PID 2704 wrote to memory of 1184	2704	RansomEXX_14_12_2020_156KB.exe	32
PID 2704 wrote to memory of 1184	2704	RansomEXX_14_12_2020_156KB.exe	32
PID 2704 wrote to memory of 1996	2704	RansomEXX_14_12_2020_156KB.exe	33
PID 2704 wrote to memory of 1996	2704	RansomEXX_14_12_2020_156KB.exe	33
PID 2704 wrote to memory of 1996	2704	RansomEXX_14_12_2020_156KB.exe	33
PID 2704 wrote to memory of 1996	2704	RansomEXX_14_12_2020_156KB.exe	33
PID 2704 wrote to memory of 2632	2704	RansomEXX_14_12_2020_156KB.exe	34
PID 2704 wrote to memory of 2632	2704	RansomEXX_14_12_2020_156KB.exe	34
PID 2704 wrote to memory of 2632	2704	RansomEXX_14_12_2020_156KB.exe	34
PID 2704 wrote to memory of 2632	2704	RansomEXX_14_12_2020_156KB.exe	34
PID 2704 wrote to memory of 1956	2704	RansomEXX_14_12_2020_156KB.exe	35
PID 2704 wrote to memory of 1956	2704	RansomEXX_14_12_2020_156KB.exe	35
PID 2704 wrote to memory of 1956	2704	RansomEXX_14_12_2020_156KB.exe	35
PID 2704 wrote to memory of 1956	2704	RansomEXX_14_12_2020_156KB.exe	35
PID 2704 wrote to memory of 2388	2704	RansomEXX_14_12_2020_156KB.exe	36
PID 2704 wrote to memory of 2388	2704	RansomEXX_14_12_2020_156KB.exe	36
PID 2704 wrote to memory of 2388	2704	RansomEXX_14_12_2020_156KB.exe	36
PID 2704 wrote to memory of 2388	2704	RansomEXX_14_12_2020_156KB.exe	36
PID 2704 wrote to memory of 1972	2704	RansomEXX_14_12_2020_156KB.exe	37
PID 2704 wrote to memory of 1972	2704	RansomEXX_14_12_2020_156KB.exe	37
PID 2704 wrote to memory of 1972	2704	RansomEXX_14_12_2020_156KB.exe	37
PID 2704 wrote to memory of 1972	2704	RansomEXX_14_12_2020_156KB.exe	37
PID 2704 wrote to memory of 1560	2704	RansomEXX_14_12_2020_156KB.exe	40
PID 2704 wrote to memory of 1560	2704	RansomEXX_14_12_2020_156KB.exe	40
PID 2704 wrote to memory of 1560	2704	RansomEXX_14_12_2020_156KB.exe	40
PID 2704 wrote to memory of 1560	2704	RansomEXX_14_12_2020_156KB.exe	40
PID 2704 wrote to memory of 684	2704	RansomEXX_14_12_2020_156KB.exe	41
PID 2704 wrote to memory of 684	2704	RansomEXX_14_12_2020_156KB.exe	41
PID 2704 wrote to memory of 684	2704	RansomEXX_14_12_2020_156KB.exe	41
PID 2704 wrote to memory of 684	2704	RansomEXX_14_12_2020_156KB.exe	41
PID 2704 wrote to memory of 2296	2704	RansomEXX_14_12_2020_156KB.exe	39
PID 2704 wrote to memory of 2296	2704	RansomEXX_14_12_2020_156KB.exe	39
PID 2704 wrote to memory of 2296	2704	RansomEXX_14_12_2020_156KB.exe	39
PID 2704 wrote to memory of 2296	2704	RansomEXX_14_12_2020_156KB.exe	39
PID 2704 wrote to memory of 2312	2704	RansomEXX_14_12_2020_156KB.exe	50
PID 2704 wrote to memory of 2312	2704	RansomEXX_14_12_2020_156KB.exe	50
PID 2704 wrote to memory of 2312	2704	RansomEXX_14_12_2020_156KB.exe	50
PID 2704 wrote to memory of 2312	2704	RansomEXX_14_12_2020_156KB.exe	50
PID 2704 wrote to memory of 2124	2704	RansomEXX_14_12_2020_156KB.exe	51
PID 2704 wrote to memory of 2124	2704	RansomEXX_14_12_2020_156KB.exe	51
PID 2704 wrote to memory of 2124	2704	RansomEXX_14_12_2020_156KB.exe	51
PID 2704 wrote to memory of 2124	2704	RansomEXX_14_12_2020_156KB.exe	51
PID 2704 wrote to memory of 2428	2704	RansomEXX_14_12_2020_156KB.exe	52
PID 2704 wrote to memory of 2428	2704	RansomEXX_14_12_2020_156KB.exe	52
PID 2704 wrote to memory of 2428	2704	RansomEXX_14_12_2020_156KB.exe	52
PID 2704 wrote to memory of 2428	2704	RansomEXX_14_12_2020_156KB.exe	52
PID 2704 wrote to memory of 3052	2704	RansomEXX_14_12_2020_156KB.exe	55
PID 2704 wrote to memory of 3052	2704	RansomEXX_14_12_2020_156KB.exe	55
PID 2704 wrote to memory of 3052	2704	RansomEXX_14_12_2020_156KB.exe	55
PID 2704 wrote to memory of 3052	2704	RansomEXX_14_12_2020_156KB.exe	55

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:2704
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:D:
  2⤵
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  PID:1184
- C:\Windows\System32\wbadmin.exe
  "C:\Windows\System32\wbadmin.exe" delete catalog -quiet
  2⤵
  - Deletes backup catalog
  PID:1996
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} recoveryenabled no
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:2632
- C:\Windows\System32\bcdedit.exe
  "C:\Windows\System32\bcdedit.exe" /set {default} bootstatuspolicy ignoreallfailures
  2⤵
  - Modifies boot configuration data using bcdedit
  PID:1956
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Change /TN "\Microsoft\Windows\SystemRestore\SR" /disable
  2⤵
  PID:2388
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:F:
  2⤵
  - Enumerates connected drives
  - System Location Discovery: System Language Discovery
  PID:1972
- C:\Windows\SysWOW64\cipher.exe
  "C:\Windows\System32\cipher.exe" /w:C:
  2⤵
  - System Location Discovery: System Language Discovery
  PID:2296
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Application
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:1560
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl System
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:684
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" sl Security /e:false
  2⤵
  - Suspicious use of AdjustPrivilegeToken
  PID:2312
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Security
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:2124
- C:\Windows\System32\wevtutil.exe
  "C:\Windows\System32\wevtutil.exe" cl Setup
  2⤵
  - Clears Windows event logs
  - Suspicious use of AdjustPrivilegeToken
  PID:2428
- C:\Windows\System32\fsutil.exe
  "C:\Windows\System32\fsutil.exe" usn deletejournal /D C:
  2⤵
  - Deletes NTFS Change Journal
  PID:3052

C:\Windows\system32\wbengine.exe
"C:\Windows\system32\wbengine.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
PID:2804

C:\Windows\System32\vdsldr.exe
C:\Windows\System32\vdsldr.exe -Embedding
1⤵
PID:1224

C:\Windows\System32\vds.exe
C:\Windows\System32\vds.exe
1⤵
PID:1952

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

Replay Monitor

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Downloads

!TXDOT_READ_ME!.txt

Path C:\MSOCache\All Users\{90140000-001B-0409-0000-0000000FF1CE}-C\!TXDOT_READ_ME!.txt
Size 1KB
SHA256 4fadb9b629e3d1c290aef74c69e172abf9184d2bd5568ad4e3612370d6235563
MD5 4f8cc0ec3b5be13683db70ad25e526a1
SHA1 8b9259e90096d3db005dc62f6dfa98d6f3866b30
SHA512 2fc2421a772597d7f424522f1f9d8a419d5f770915647b72cd974ac0140955bfc2d00da2df82be2ad55fb044873acd950364e6aa232f28794e5bf7d202ced703
MD5 SHA1 SHA512

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ShowUnblock.xlsx

Path C:\Users\Admin\Desktop\ShowUnblock.xlsx
Size 14KB
SHA256 15ca3016b16d03b2dba0f4be6e2a9e534a194fedc41b02ada3d1ad746345bc49
MD5 d5107cdda58fb9af648d176be350cdb0
SHA1 a984c028bb6ffb159f292d91ab7c304354c3225f
SHA512 facb9ad4b9e5690098822d1742ddcb00fd3e57b0772889b1ada5e788bd1c305bf447607d0140f2261443f2bef3de56f5158dca8500fe595b80ccd38dabdf4c30
SSDEEP 384:2Y1a/XbAXCRf2aKhFFAd5VBxkG9b+Zgkk:fa/XbAXCRf2BSbBxkxgkk
MD5 SHA1 SHA512 SSDEEP

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