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General
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Target
https://download.oxy.cloud/d/bchi/2/858f276bb0052113f612791ea5f59928
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Sample
250316-w564dszqs8
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://download.oxy.cloud/d/bchi/2/858f276bb0052113f612791ea5f59928
Resource
win11-20250313-en
Malware Config
Extracted
phemedrone
https://api.telegram.org/bot7940307483:AAEmmDBRKx8kRMTrlD986B7qCulYd2jfQHw/sendDocument
Extracted
gurcu
https://api.telegram.org/bot7940307483:AAEmmDBRKx8kRMTrlD986B7qCulYd2jfQHw/sendDocumen
Targets
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Target
https://download.oxy.cloud/d/bchi/2/858f276bb0052113f612791ea5f59928
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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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Dcrat family
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Detect Umbral payload
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Gurcu family
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Phemedrone family
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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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Umbral family
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Uses browser remote debugging
Can be used control the browser and steal sensitive information such as credentials and session cookies.
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Executes dropped EXE
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Unsecured Credentials: Credentials In Files
Steal credentials from unsecured files.
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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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Modifies WinLogon
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Winlogon Helper DLL
1Modify Authentication Process
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Winlogon Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Modify Authentication Process
1Modify Registry
1Subvert Trust Controls
1SIP and Trust Provider Hijacking
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Modify Authentication Process
1Steal Web Session Cookie
1Unsecured Credentials
3Credentials In Files
3