General
- Target www.yorokeikoku.com_ransome.exe
- Size 39KB
- Sample261027-sbpepsey4k
- SHA256 bd1822658effe4364d88fcbc1ca4d3e3a8bae15b399abad7b00968dcc7aa1de2
- MD5 f5a45577e741ca7ac9722521485a7dab
- SHA1 48eafe80de3e3cc237591997521e020fca04aca0
- SHA512 e603aced0031fe6c92d3666330813d6372dd843a13e8ddaccc621da219a27bf57cd73a06029a990f82df19e9069cd6c346c1e18b7b219c8da59bc2efc44f4c24
- SSDEEP 768:pkr0Yq2YHzFql9az1YWJcmoIB9iH2dEEusXqKhFJayzr:80YqfzZz1YWemoIB9iWdf9XqiFJb
- TLSH T1FC03E80437FD8628E1BF6ABB4D7286009775F49B9D13D70D0ED1848E1AB3B448AD9B93
- MD5 SHA1 SHA512 SSDEEP TLSH
Behavioral task
behavioral1
Sample
www.yorokeikoku.com_ransome.exe
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
www.yorokeikoku.com_ransome.exe
Resource
win11ltsc2024-20260911-en
Malware Config
Extracted
-
nanocore
-
c2_port
22401
Targets
-
- Target www.yorokeikoku.com_ransome.exe
- Size 39KB
- SHA256 bd1822658effe4364d88fcbc1ca4d3e3a8bae15b399abad7b00968dcc7aa1de2
- MD5 f5a45577e741ca7ac9722521485a7dab
- SHA1 48eafe80de3e3cc237591997521e020fca04aca0
- SHA512 e603aced0031fe6c92d3666330813d6372dd843a13e8ddaccc621da219a27bf57cd73a06029a990f82df19e9069cd6c346c1e18b7b219c8da59bc2efc44f4c24
- SSDEEP 768:pkr0Yq2YHzFql9az1YWJcmoIB9iH2dEEusXqKhFJayzr:80YqfzZz1YWemoIB9iWdf9XqiFJb
- TLSH T1FC03E80437FD8628E1BF6ABB4D7286009775F49B9D13D70D0ED1848E1AB3B448AD9B93
- MD5 SHA1 SHA512 SSDEEP TLSH
-
Deletes shadow copies
Ransomware often targets backup files to inhibit system recovery.
-
Grants admin privileges
Uses net.exe to modify the user's privileges.
-
Disables one or more Microsoft Defender components
Uses the Powershell Set-MpPreference cmdlet to disable one or more Microsoft Defender components.
-
Modifies Windows Firewall
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Creates a file in the Startup directory
A file was written to a Windows startup folder. Files in these directories are executed automatically when a user logs on or an application initializes.
-
Stops running service(s)
-
Adds Run key to start application
-
Creates a new local user account
Uses net.exe to create a new local user account, often for persistence or a backdoor account.
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1System Services
1Service Execution
1Windows Management Instrumentation
1Persistence
Account Manipulation
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create Account
1Local Account
1Create or Modify System Process
2Windows Service
2Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Account Manipulation
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Create or Modify System Process
2Windows Service
2Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Direct Volume Access
1Impair Defenses
3Disable or Modify System Firewall
1Disable or Modify Tools
1Indicator Removal
2File Deletion
2Modify Registry
1