General
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Target
E3A480A53D8B2C398A7642E1F4E84785.exe
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Size
12.9MB
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Sample
241030-nqkb3s1mgz
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MD5
e3a480a53d8b2c398a7642e1f4e84785
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SHA1
7f8fa5e3dc9be9055f9202213be33460a1af1e09
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SHA256
11e550c201ee70fb01902b1e84b19a133c0861e170c764db9d8755be67fdcde2
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SHA512
b3fce5ac73b75fb70d6c798517426ee614b72f24236baf07752f1289a8ce78d74c3c1ec5168f1d8fbcaa5b7de072ef3175f895ac1a49379f716209df49d103e8
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SSDEEP
393216:oJlQ1evI2bs6Yuno3rkJ3InoKasOnHDJaM8t:obQpgssCKInwjJaMu
Behavioral task
behavioral1
Sample
E3A480A53D8B2C398A7642E1F4E84785.exe
Resource
win7-20241023-en
Behavioral task
behavioral2
Sample
E3A480A53D8B2C398A7642E1F4E84785.exe
Resource
win10v2004-20241007-en
Malware Config
Extracted
umbral
https://discord.com/api/webhooks/1266665187293794356/BgUJDQi9QXAA0avjRcAiy-uTUWdbVUSk8SQjon--JNjDxPP5bEhE6DLfJFghJ_KLSRhA
Targets
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Target
E3A480A53D8B2C398A7642E1F4E84785.exe
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Size
12.9MB
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MD5
e3a480a53d8b2c398a7642e1f4e84785
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SHA1
7f8fa5e3dc9be9055f9202213be33460a1af1e09
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SHA256
11e550c201ee70fb01902b1e84b19a133c0861e170c764db9d8755be67fdcde2
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SHA512
b3fce5ac73b75fb70d6c798517426ee614b72f24236baf07752f1289a8ce78d74c3c1ec5168f1d8fbcaa5b7de072ef3175f895ac1a49379f716209df49d103e8
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SSDEEP
393216:oJlQ1evI2bs6Yuno3rkJ3InoKasOnHDJaM8t:obQpgssCKInwjJaMu
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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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Modifies WinLogon for persistence
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Modifies security service
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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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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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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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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
2Windows Service
2Scheduled Task/Job
1Scheduled Task
1