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Windows
Analysis Report
RuntimeBroker.exe
Overview
General Information
Detection
Quasar
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
Antivirus detection for dropped file
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Sigma detected: Schedule system process
Yara detected Quasar RAT
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Drops executables to the windows directory (C:\Windows) and starts them
Hides that the sample has been downloaded from the Internet (zone.identifier)
Installs a global keyboard hook
Machine Learning detection for dropped file
Machine Learning detection for sample
Sigma detected: Files With System Process Name In Unsuspected Locations
Sigma detected: System File Execution Location Anomaly
Sigma detected: Windows Binaries Write Suspicious Extensions
Uses schtasks.exe or at.exe to add and modify task schedules
Yara detected Generic Downloader
Allocates memory with a write watch (potentially for evading sandboxes)
Contains functionality to detect virtual machines (STR)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Creates files inside the system directory
Detected TCP or UDP traffic on non-standard ports
Detected potential crypto function
Drops PE files
Drops PE files to the windows directory (C:\Windows)
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Internet Provider seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Queries the volume information (name, serial number etc) of a device
Sample execution stops while process was sleeping (likely an evasion)
Sample file is different than original file name gathered from version info
Uses 32bit PE files
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
- RuntimeBroker.exe (PID: 360 cmdline:
"C:\Users\ user\Deskt op\Runtime Broker.exe " MD5: 57145C33045CE67E1C1FE7C763438AB1) - schtasks.exe (PID: 1008 cmdline:
"schtasks" /create / tn "Runtim eBroker" / sc ONLOGON /tr "C:\W indows\sys tem32\a7\R untimeBrok er.exe" /r l HIGHEST /f MD5: 76CD6626DD8834BD4A42E6A565104DC2) - conhost.exe (PID: 6932 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D) - RuntimeBroker.exe (PID: 6384 cmdline:
"C:\Window s\system32 \a7\Runtim eBroker.ex e" MD5: 57145C33045CE67E1C1FE7C763438AB1) - schtasks.exe (PID: 7204 cmdline:
"schtasks" /create / tn "Runtim eBroker" / sc ONLOGON /tr "C:\W indows\sys tem32\a7\R untimeBrok er.exe" /r l HIGHEST /f MD5: 76CD6626DD8834BD4A42E6A565104DC2) - conhost.exe (PID: 7216 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: 0D698AF330FD17BEE3BF90011D49251D)
- RuntimeBroker.exe (PID: 3180 cmdline:
C:\Windows \system32\ a7\Runtime Broker.exe MD5: 57145C33045CE67E1C1FE7C763438AB1)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Quasar RAT, QuasarRAT | Quasar RAT is a malware family written in .NET which is used by a variety of attackers. The malware is fully functional and open source, and is often packed to make analysis of the source more difficult. |
{"Version": "1.4.1", "Host:Port": "qrpn9be.localto.net:2810;", "InstallName": "RuntimeBroker.exe", "MutexName": "fc5edab1-6e8f-4963-98aa-bd077e08750f", "StartupKey": "RuntimeBroker", "Tag": "RuntimeBroker", "LogDirectoryName": "Logs", "ServerSignature": "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", "ServerCertificate": "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"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
MAL_QuasarRAT_May19_1 | Detects QuasarRAT malware | Florian Roth |
| |
INDICATOR_SUSPICIOUS_GENInfoStealer | Detects executables containing common artifcats observed in infostealers | ditekSHen |
| |
MALWARE_Win_QuasarStealer | Detects Quasar infostealer | ditekshen |
|
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
MAL_QuasarRAT_May19_1 | Detects QuasarRAT malware | Florian Roth |
| |
INDICATOR_SUSPICIOUS_GENInfoStealer | Detects executables containing common artifcats observed in infostealers | ditekSHen |
| |
MALWARE_Win_QuasarStealer | Detects Quasar infostealer | ditekshen |
|
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_GenericDownloader_1 | Yara detected Generic Downloader | Joe Security | ||
MAL_QuasarRAT_May19_1 | Detects QuasarRAT malware | Florian Roth |
| |
INDICATOR_SUSPICIOUS_GENInfoStealer | Detects executables containing common artifcats observed in infostealers | ditekSHen |
| |
MALWARE_Win_QuasarStealer | Detects Quasar infostealer | ditekshen |
|
System Summary |
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Source: | Author: Sander Wiebing, Tim Shelton, Nasreddine Bencherchali (Nextron Systems): |
Source: | Author: Florian Roth (Nextron Systems), Patrick Bareiss, Anton Kutepov, oscd.community, Nasreddine Bencherchali: |
Source: | Author: Nasreddine Bencherchali (Nextron Systems): |
Persistence and Installation Behavior |
---|
Source: | Author: Joe Security: |
⊘No Suricata rule has matched
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AV Detection |
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Source: | Avira: |
Source: | Avira URL Cloud: |
Source: | Avira: |
Source: | Malware Configuration Extractor: |