General
- Target WindowsUpdate.exe
- Size 104.7MB
- Sample260802-ernlfsszgw
- SHA256 64bde6c4880c0ec2787f22b3e2856a4e296cc4b64b20ee3641082fa6c0d52512
- MD5 74f28c3722040a999e53aa8d34af697d
- SHA1 aea55d4a5a76059ce68d822aaf371d46d8596095
- SHA512 ae8de578ebb74be97207b54e41fcb457eb4d9c3be2d6402b9cbcc1c58866bd249c7978c80be62b28140d2888b35f4be4b9555ff99ec6e4e12cfd91f9fcf4a7c5
- SSDEEP 3145728:8fDEQlLgaR55oR/E0/kd0xF8FxH09Vx9XK+8ATT/3o:6n3R0FEPvQVx8+pTA
- TLSH T16A3833C0DA8236FBD8B04030F515AC35A69622CB5F7391AF1FE461252E677859BB08FD
- MD5 SHA1 SHA512 SSDEEP TLSH
Behavioral task
behavioral1
Sample
WindowsUpdate.exe
Resource
win11-20260513-en
Malware Config
Targets
-
- Target WindowsUpdate.exe
- Size 104.7MB
- SHA256 64bde6c4880c0ec2787f22b3e2856a4e296cc4b64b20ee3641082fa6c0d52512
- MD5 74f28c3722040a999e53aa8d34af697d
- SHA1 aea55d4a5a76059ce68d822aaf371d46d8596095
- SHA512 ae8de578ebb74be97207b54e41fcb457eb4d9c3be2d6402b9cbcc1c58866bd249c7978c80be62b28140d2888b35f4be4b9555ff99ec6e4e12cfd91f9fcf4a7c5
- SSDEEP 3145728:8fDEQlLgaR55oR/E0/kd0xF8FxH09Vx9XK+8ATT/3o:6n3R0FEPvQVx8+pTA
- TLSH T16A3833C0DA8236FBD8B04030F515AC35A69622CB5F7391AF1FE461252E677859BB08FD
- MD5 SHA1 SHA512 SSDEEP TLSH
-
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.
-
Loads dropped DLL
-
Adds Run key to start application
-
Contacts third-party web service commonly abused for C2
Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.
-
Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
-
Writes to the Master Boot Record (MBR)
Bootkits write to the MBR to gain persistence at a level below the operating system.
MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Windows Command Shell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
2Scheduled Task/Job
1Scheduled Task
1