General
-
Target
DCRatBuild.exe
-
Size
1.5MB
-
Sample
240619-r94fvasdmb
-
MD5
c9c86d7f5da7185796d38533ff00e122
-
SHA1
795a06d1d2c4c3930c9e078ae7697b672deae551
-
SHA256
7b612f59430f89b4a130c19c3f59e036e93cd21b8b8dd9049f453ad39aefb516
-
SHA512
bc4d249dfeb1864556eca5fb02ded4530c09f0c7aa2b37e05c1fe9215058613f7e9e086e856259e7c25d49229b03289f75c691bfb786b227040e549f4ff1502f
-
SSDEEP
24576:q2G/nvxW3WXlB6Fw6rxnwoHnf6YkBCY3CE63SjC8ElvCmR2:qbA3q4wsxvfQ3cX8ElfM
Behavioral task
behavioral1
Sample
DCRatBuild.exe
Resource
win7-20240611-en
Behavioral task
behavioral2
Sample
DCRatBuild.exe
Resource
win10v2004-20240611-en
Malware Config
Targets
-
-
Target
DCRatBuild.exe
-
Size
1.5MB
-
MD5
c9c86d7f5da7185796d38533ff00e122
-
SHA1
795a06d1d2c4c3930c9e078ae7697b672deae551
-
SHA256
7b612f59430f89b4a130c19c3f59e036e93cd21b8b8dd9049f453ad39aefb516
-
SHA512
bc4d249dfeb1864556eca5fb02ded4530c09f0c7aa2b37e05c1fe9215058613f7e9e086e856259e7c25d49229b03289f75c691bfb786b227040e549f4ff1502f
-
SSDEEP
24576:q2G/nvxW3WXlB6Fw6rxnwoHnf6YkBCY3CE63SjC8ElvCmR2:qbA3q4wsxvfQ3cX8ElfM
Score10/10-
DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
-
Modifies WinLogon for persistence
-
Process spawned unexpected child process
This typically indicates the parent process was compromised via an exploit or macro.
-
Downloads MZ/PE file
-
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
-
Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
-
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1