General
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Target
SolaraBootstrapper.exe
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Size
9.5MB
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Sample
240723-lykxga1amk
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MD5
42cd418e50599036f45acf1e639fb132
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SHA1
708932af15b8b01349f37adb246206408b22d807
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SHA256
7147f433db58190a7b35946752424a8e95fb7e45a3c6f4c1b24abc029c69bbcf
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SHA512
f4243c7ffbb7fe2b9717a995f8f65c16b518d336db2b2556a44d7396558f3246f650b5166a69019adead424d2c78bb09a651436cae9034fb6f1cced3e23a1326
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SSDEEP
196608:gwCE7JB0tYrXLW+d7UcIxptvyUQymRDSI1WCOK5l:gwCE9B0OjrdLK4J/7
Behavioral task
behavioral1
Sample
SolaraBootstrapper.exe
Resource
win10v2004-20240709-en
Malware Config
Targets
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Target
SolaraBootstrapper.exe
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Size
9.5MB
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MD5
42cd418e50599036f45acf1e639fb132
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SHA1
708932af15b8b01349f37adb246206408b22d807
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SHA256
7147f433db58190a7b35946752424a8e95fb7e45a3c6f4c1b24abc029c69bbcf
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SHA512
f4243c7ffbb7fe2b9717a995f8f65c16b518d336db2b2556a44d7396558f3246f650b5166a69019adead424d2c78bb09a651436cae9034fb6f1cced3e23a1326
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SSDEEP
196608:gwCE7JB0tYrXLW+d7UcIxptvyUQymRDSI1WCOK5l:gwCE9B0OjrdLK4J/7
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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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Modifies WinLogon for persistence
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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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XMRig Miner payload
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Command and Scripting Interpreter: PowerShell
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
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Downloads MZ/PE file
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Event Triggered Execution: AppInit DLLs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
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.NET Reactor proctector
Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.
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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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Blocklisted process makes network request
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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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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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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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Drops file in System32 directory
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Suspicious use of SetThreadContext
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MITRE ATT&CK Enterprise v15
Execution
Command and Scripting Interpreter
1PowerShell
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Event Triggered Execution
1AppInit DLLs
1Scheduled Task/Job
1Scheduled Task
1