General
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Target
a539cf912da1307e901cb90312df5273b8702492e6a0f4e4802cd4004919b3e4.exe
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Size
18.0MB
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Sample
240530-btqxtaad75
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MD5
2d41eca3ec808efb425bdc7ea84d67bb
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SHA1
aaf40e152a63229732b66581840bc2cb7b86eab0
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SHA256
a539cf912da1307e901cb90312df5273b8702492e6a0f4e4802cd4004919b3e4
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SHA512
dd8e446002817a6401b9aa7d05ed0614efdcf1f1b338b206d90ef10e09a8a49438bc646118bacf0c2a1eb1ecdb773a5cec04ed897e57e238dfc4b4b7af468b56
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SSDEEP
393216:/BeVnrj1rhDY+kPskzQsFBkw5/XPZ3w/okY3VoOTWOL7E7:UVrj1Fc+Xy/NCwVoOTe
Static task
static1
Behavioral task
behavioral1
Sample
a539cf912da1307e901cb90312df5273b8702492e6a0f4e4802cd4004919b3e4.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
a539cf912da1307e901cb90312df5273b8702492e6a0f4e4802cd4004919b3e4.exe
Resource
win10v2004-20240508-en
Malware Config
Targets
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Target
a539cf912da1307e901cb90312df5273b8702492e6a0f4e4802cd4004919b3e4.exe
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Size
18.0MB
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MD5
2d41eca3ec808efb425bdc7ea84d67bb
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SHA1
aaf40e152a63229732b66581840bc2cb7b86eab0
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SHA256
a539cf912da1307e901cb90312df5273b8702492e6a0f4e4802cd4004919b3e4
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SHA512
dd8e446002817a6401b9aa7d05ed0614efdcf1f1b338b206d90ef10e09a8a49438bc646118bacf0c2a1eb1ecdb773a5cec04ed897e57e238dfc4b4b7af468b56
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SSDEEP
393216:/BeVnrj1rhDY+kPskzQsFBkw5/XPZ3w/okY3VoOTWOL7E7:UVrj1Fc+Xy/NCwVoOTe
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DcRat
DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.
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Modifies WinLogon for persistence
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Process spawned unexpected child process
This typically indicates the parent process was compromised via an exploit or macro.
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Detects executables containing bas64 encoded gzip files
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Executes dropped EXE
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Loads dropped DLL
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Adds Run key to start application
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Legitimate hosting services abused for malware hosting/C2
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Looks up external IP address via web service
Uses a legitimate IP lookup service to find the infected system's external IP.
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Scheduled Task/Job
1