General
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Target
http://google.com
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Sample
250119-wnk5layraw
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
http://google.com
Resource
win10v2004-20241007-en
Malware Config
Extracted
crimsonrat
185.136.161.124
Targets
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Target
http://google.com
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Chimera
Ransomware which infects local and network files, often distributed via Dropbox links.
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Chimera Ransomware Loader DLL
Drops/unpacks executable file which resembles Chimera's Loader.dll.
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Chimera family
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CrimsonRAT main payload
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Crimsonrat 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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Renames multiple (3286) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Boot or Logon Autostart Execution: Active Setup
Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.
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Downloads MZ/PE file
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Event Triggered Execution: Image File Execution Options Injection
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Office macro that triggers on suspicious action
Office document macro which triggers in special circumstances - often malicious.
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Checks computer location settings
Looks up country code configured in the registry, likely geofence.
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Event Triggered Execution: Component Object Model Hijacking
Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.
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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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Checks installed software on the system
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Drops desktop.ini file(s)
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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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Checks system information in the registry
System information is often read in order to detect sandboxing environments.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Browser Extensions
1Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Privilege Escalation
Boot or Logon Autostart Execution
2Active Setup
1Registry Run Keys / Startup Folder
1Event Triggered Execution
2Component Object Model Hijacking
1Image File Execution Options Injection
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1