General
- Target library
- Size 33KB
- Sample260916-clyhcser3z
- SHA256 521a23dc74f1205aaa40bd0d73036be8382f692862ffa1878b5ef6eae0f8d547
- MD5 c0b0250f5435f6a5320d1c772062c5b7
- SHA1 87e9055ba887a61a359ec487da5bb12b0d18278e
- SHA512 a2eb7e1bed6f7331c0c4c9c5337fd626033ed0247df273fffc73f57e976e0abede6ff6ff7aa4b17dc51fc5a4a222bbbc65da3cdaa27451f05a6a0074671fb36e
- SSDEEP 768:U7g/i5leOfMXqS5PHvJingqna03O7m7Y7AYlOm+BhGoyI7imS:3/i54OfeqS5PRingqna03O7m7Y7KKNIY
- TLSH T1EBE2932661F7B87700A391F1299A070ABDE3422BC65E891176FD069D9FE2F46ED031C9
- MD5 SHA1 SHA512 SSDEEP TLSH
Static task
static1
Behavioral task
behavioral1
Sample
library.html
Resource
win10v2004-20260911-en
Behavioral task
behavioral2
Sample
library.html
Resource
win11ltsc2024-20260911-en
Malware Config
Extracted
-
crimsonrat
-
185.136.161.124
Targets
-
- Target library
- Size 33KB
- SHA256 521a23dc74f1205aaa40bd0d73036be8382f692862ffa1878b5ef6eae0f8d547
- MD5 c0b0250f5435f6a5320d1c772062c5b7
- SHA1 87e9055ba887a61a359ec487da5bb12b0d18278e
- SHA512 a2eb7e1bed6f7331c0c4c9c5337fd626033ed0247df273fffc73f57e976e0abede6ff6ff7aa4b17dc51fc5a4a222bbbc65da3cdaa27451f05a6a0074671fb36e
- SSDEEP 768:U7g/i5leOfMXqS5PHvJingqna03O7m7Y7AYlOm+BhGoyI7imS:3/i54OfeqS5PRingqna03O7m7Y7KKNIY
- TLSH T1EBE2932661F7B87700A391F1299A070ABDE3422BC65E891176FD069D9FE2F46ED031C9
- MD5 SHA1 SHA512 SSDEEP TLSH
-
CrimsonRAT main payload
-
Modifies WinLogon for persistence
-
UAC bypass
-
Modifies boot configuration data using bcdedit
-
Downloads MZ/PE file
-
Checks computer location settings
Looks up country code configured in the registry, likely geofence.
-
Executes dropped EXE
-
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.
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
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Abuse Elevation Control Mechanism
1Bypass User Account Control
1Impair Defenses
1Disable or Modify Tools
1Modify Registry
4Subvert Trust Controls
1Install Root Certificate
1