General
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Target
https://disk.yandex.ru/d/WO0EaLJqnt5DLw
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Sample
230114-xv2llagb71
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://disk.yandex.ru/d/WO0EaLJqnt5DLw
Resource
win7-20220812-en
windows7-x64
9 signatures
150 seconds
Behavioral task
behavioral2
Sample
https://disk.yandex.ru/d/WO0EaLJqnt5DLw
Resource
win10v2004-20220812-en
windows10-2004-x64
20 signatures
150 seconds
Malware Config
Targets
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Target
https://disk.yandex.ru/d/WO0EaLJqnt5DLw
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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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Identifies VirtualBox via ACPI registry values (likely anti-VM)
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Downloads MZ/PE file
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Executes dropped EXE
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Checks BIOS information in registry
BIOS information is often read in order to detect sandboxing environments.
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Loads dropped DLL
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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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Suspicious use of NtSetInformationThreadHideFromDebugger
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