General
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Target
https://github.com/enginestein/Virus-Collection
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Sample
250131-m6vx3stnct
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
https://github.com/enginestein/Virus-Collection
Resource
win11-20241007-en
Malware Config
Extracted
crimsonrat
185.136.161.124
Targets
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Target
https://github.com/enginestein/Virus-Collection
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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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Modifies visiblity of hidden/system files in Explorer
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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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Quasar family
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Quasar payload
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Renames multiple (3271) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Contacts a large (1117) amount of remote hosts
This may indicate a network scan to discover remotely running services.
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Downloads MZ/PE file
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Drops startup file
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Executes dropped EXE
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Loads dropped DLL
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Unsecured Credentials: Credentials In Files
Steal credentials from unsecured files.
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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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Enumerates connected drives
Attempts to read the root path of hard drives other than the default C: drive.
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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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Drops autorun.inf file
Malware can abuse Windows Autorun to spread further via attached volumes.
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Drops file in System32 directory
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MITRE ATT&CK Enterprise v15
Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Defense Evasion
Hide Artifacts
1Hidden Files and Directories
1Modify Registry
3Subvert Trust Controls
1SIP and Trust Provider Hijacking
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
3Credentials In Files
3