General
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Target
http://google.com
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Sample
250325-bswrnsyyfv
Static task
static1
URLScan task
urlscan1
Behavioral task
behavioral1
Sample
http://google.com
Resource
win11-20250314-en
Malware Config
Extracted
revengerat
Guest
0.tcp.ngrok.io:19521
RV_MUTEX
Extracted
darkcomet
Guest1111
193.242.166.48:1605
DC_MUTEX-2QRLPN3
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InstallPath
Windupdt\winupdate.exe
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gencode
Rb5l52XcV9no
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install
true
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offline_keylogger
false
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password
313131
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persistence
true
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reg_key
winupdater
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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Darkcomet family
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Modifies WinLogon for persistence
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Njrat family
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Revengerat family
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Renames multiple (3245) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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RevengeRat Executable
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Downloads MZ/PE file
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Modifies Windows Firewall
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Drops startup file
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Executes dropped EXE
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Uses the VBS compiler for execution
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Adds Run key to start application
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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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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
1Scheduled Task/Job
1Scheduled Task
1Persistence
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
2Registry Run Keys / Startup Folder
1Winlogon Helper DLL
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Hide Artifacts
2Hidden Files and Directories
2Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
3Subvert Trust Controls
1SIP and Trust Provider Hijacking
1Credential Access
Credentials from Password Stores
1Credentials from Web Browsers
1Unsecured Credentials
1Credentials In Files
1