General
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://cdn.discordapp.com/attachments/1180592646717190237/1182064237032509522/NostalgiaPaste.rar?ex=65df9f1b&is=65cd2a1b&hm=3c0a61ea2247e3f698bf71ed771fd9dd3966154830e2f85283fa05c17b99e044&
Resource
win10v2004-20240221-en
windows10-2004-x64
21 signatures
150 seconds
Malware Config
Targets
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Target
https://cdn.discordapp.com/attachments/1180592646717190237/1182064237032509522/NostalgiaPaste.rar?ex=65df9f1b&is=65cd2a1b&hm=3c0a61ea2247e3f698bf71ed771fd9dd3966154830e2f85283fa05c17b99e044&
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Detect Umbral payload
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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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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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Suspicious use of NtSetInformationThreadHideFromDebugger
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