General
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Target
DCRatBuild.exe
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Size
1.5MB
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Sample
241003-vgtygszclb
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MD5
e78270f2dd7fff838367ef6f21dd66b8
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SHA1
65f4ce35b3b6ce4ffb0b58c52eaaba0eaee0d967
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SHA256
50a2309f0bcc23f11df0aeced7d31f59fd063fe620f463760fbd81cbaff7892b
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SHA512
2a952d7b54680be7fbd0e101bae4cc97016f210a0730885e4ed23d21bc06e8722a4210b9050764d42ad73ac53bd6181c591a8fe68ce110556395d62b56f10bd0
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SSDEEP
24576:U2G/nvxW3Ww0tvpnEL55c6t87/6Li9lfOaJt6gD5hNjoHTqwGcy8oQzhcL/H:UbA30vpn8P8PTmaPFEHTqw3y8oQ1i/
Behavioral task
behavioral1
Sample
DCRatBuild.exe
Resource
win7-20240729-en
Behavioral task
behavioral2
Sample
DCRatBuild.exe
Resource
win10v2004-20240802-en
Malware Config
Targets
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Target
DCRatBuild.exe
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Size
1.5MB
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MD5
e78270f2dd7fff838367ef6f21dd66b8
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SHA1
65f4ce35b3b6ce4ffb0b58c52eaaba0eaee0d967
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SHA256
50a2309f0bcc23f11df0aeced7d31f59fd063fe620f463760fbd81cbaff7892b
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SHA512
2a952d7b54680be7fbd0e101bae4cc97016f210a0730885e4ed23d21bc06e8722a4210b9050764d42ad73ac53bd6181c591a8fe68ce110556395d62b56f10bd0
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SSDEEP
24576:U2G/nvxW3Ww0tvpnEL55c6t87/6Li9lfOaJt6gD5hNjoHTqwGcy8oQzhcL/H:UbA30vpn8P8PTmaPFEHTqw3y8oQ1i/
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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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Process spawned unexpected child process
This typically indicates the parent process was compromised via an exploit or macro.
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Boot or Logon Autostart Execution: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
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Downloads MZ/PE file
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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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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Active Setup
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Active Setup
1Scheduled Task/Job
1Scheduled Task
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1