General
- Target Whyet-4.9.exe
- Size 20.2MB
- Sample241229-sefa7stpfx
- SHA256 38622c32cac325c68f2fbf7148255a9813e7caeb53e3b95ebea56a6da5cb22ba
- MD5 f317c17035501aaad0abfaf9fba4c085
- SHA1 f522fec1296c065cd4c3eaf52d1c4fbc26fd9f28
- SHA512 147e484e12adf36e9c3a446b3a08af2c274e4acdff04b2eb5a3164771b3eb9c7e1f15858289b7c19eabc97f99d06936ead9ff94ce05f892af45d757ac65a9d08
- SSDEEP 393216:OecgR96USu2VkX3mGZHoRJ3+j8yvn7lbt0lWL:kVHemGZMkT7lbt0YL
- MD5 SHA1 SHA512 SSDEEP
Static task
static1
Behavioral task
behavioral1
Sample
Whyet-4.9.exe
Resource
win7-20240903-en
Behavioral task
behavioral2
Sample
Whyet-4.9.exe
Resource
win10v2004-20241007-en
Malware Config
Targets
-
- Target Whyet-4.9.exe
- Size 20.2MB
- SHA256 38622c32cac325c68f2fbf7148255a9813e7caeb53e3b95ebea56a6da5cb22ba
- MD5 f317c17035501aaad0abfaf9fba4c085
- SHA1 f522fec1296c065cd4c3eaf52d1c4fbc26fd9f28
- SHA512 147e484e12adf36e9c3a446b3a08af2c274e4acdff04b2eb5a3164771b3eb9c7e1f15858289b7c19eabc97f99d06936ead9ff94ce05f892af45d757ac65a9d08
- SSDEEP 393216:OecgR96USu2VkX3mGZHoRJ3+j8yvn7lbt0lWL:kVHemGZMkT7lbt0YL
- MD5 SHA1 SHA512 SSDEEP
-
Identifies VirtualBox via ACPI registry values (likely anti-VM)
-
Downloads MZ/PE file
-
Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Executes dropped EXE
-
Loads dropped DLL
-
Adds Run key to start application
-
Indicator Removal: File Deletion
Adversaries may delete files left behind by the actions of their intrusion activity.
-
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 v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Pre-OS Boot
1Bootkit
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Indicator Removal
1File Deletion
1Modify Registry
3Pre-OS Boot
1Bootkit
1Virtualization/Sandbox Evasion
1