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Windows
Analysis Report
KxgGGaiW3E.exe
Overview
General Information
| Sample name: | KxgGGaiW3E.exerenamed because original name is a hash value |
| Original sample name: | eb0beafcb365cd20eb00ff9e19b73232.exe |
| Analysis ID: | 1430591 |
| MD5: | eb0beafcb365cd20eb00ff9e19b73232 |
| SHA1: | 1a4470109418e1110588d52851e320ecefcba7de |
| SHA256: | 31b494be325fc9c97031135886454b1370e5e3608c757f74784c6b6fb2fb5c99 |
| Tags: | 64exe |
| Infos: |   |
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Detection
Quasar
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Found malware configuration
Malicious sample detected (through community Yara rule)
Snort IDS alert for network traffic
Yara detected Quasar RAT
Adds a directory exclusion to Windows Defender
Allocates memory in foreign processes
C2 URLs / IPs found in malware configuration
Drops PE files to the user root directory
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Loading BitLocker PowerShell Module
Sigma detected: Powershell Base64 Encoded MpPreference Cmdlet
Uses regedit.exe to modify the Windows registry
Writes to foreign memory regions
Yara detected Generic Downloader
Allocates memory with a write watch (potentially for evading sandboxes)
Compiles C# or VB.Net code
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 user directory
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found potential string decryption / allocating functions
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
PE file contains sections with non-standard names
Queries disk information (often used to detect virtual machines)
Queries sensitive BIOS Information (via WMI, Win32_Bios & Win32_BaseBoard, often done to detect virtual machines)
Queries sensitive processor information (via WMI, Win32_Processor, often done to detect virtual machines)
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
Sigma detected: CurrentVersion Autorun Keys Modification
Sigma detected: Powershell Defender Exclusion
Sigma detected: Uncommon Svchost Parent Process
Stores files to the Windows start menu directory
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
| 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. |
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AV Detection |
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| Source: |
Malware Configuration Extractor: | ||