Windows
Analysis Report
Auftragsbest#U00e4tigung.exe
Overview
General Information
Sample name: | Auftragsbest#U00e4tigung.exerenamed because original name is a hash value |
Original sample name: | Auftragsbesttigung.exe |
Analysis ID: | 1619889 |
MD5: | dae9eb1454d9b439b74d1e85dba72223 |
SHA1: | 794e6bc004dfaabc8328357e4514d4d60db463c1 |
SHA256: | 2383b97ef686b72097c44f7b83f4f0ed27e97fb378c3bcab610fc7ca1e9100b6 |
Tags: | exeuser-lowmal3 |
Infos: | |
Detection
Quasar
Score: | 100 |
Range: | 0 - 100 |
Confidence: | 100% |
Signatures
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected AntiVM3
Yara detected Quasar RAT
.NET source code contains potential unpacker
Hides that the sample has been downloaded from the Internet (zone.identifier)
Injects a PE file into a foreign processes
Joe Sandbox ML detected suspicious sample
Sample uses string decryption to hide its real strings
Tries to detect sandboxes and other dynamic analysis tools (process name or module or function)
Yara detected Costura Assembly Loader
Allocates memory with a write watch (potentially for evading sandboxes)
Contains functionality to call native functions
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected TCP or UDP traffic on non-standard ports
Detected non-DNS traffic on DNS port
Detected potential crypto function
Drops PE files
Enables debug privileges
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
Found inlined nop instructions (likely shell or obfuscated code)
HTTP GET or POST without a user agent
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 check the online IP address of the machine
May sleep (evasive loops) to hinder dynamic analysis
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 file is different than original file name gathered from version info
Sigma detected: CurrentVersion Autorun Keys Modification
Uses 32bit PE files
Uses a known web browser user agent for HTTP communication
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
Auftragsbest#U00e4tigung.exe (PID: 2748 cmdline:
"C:\Users\ user\Deskt op\Auftrag sbest#U00e 4tigung.ex e" MD5: DAE9EB1454D9B439B74D1E85DBA72223) Auftragsbest#U00e4tigung.exe (PID: 964 cmdline:
"C:\Users\ user\Deskt op\Auftrag sbest#U00e 4tigung.ex e" MD5: DAE9EB1454D9B439B74D1E85DBA72223)
styfuihs5ty.exe (PID: 7072 cmdline:
"C:\Users\ user\AppDa ta\Roaming \styfuihs5 ty.exe" MD5: DAE9EB1454D9B439B74D1E85DBA72223) styfuihs5ty.exe (PID: 7120 cmdline:
"C:\Users\ user\AppDa ta\Roaming \styfuihs5 ty.exe" MD5: DAE9EB1454D9B439B74D1E85DBA72223)
styfuihs5ty.exe (PID: 6196 cmdline:
"C:\Users\ user\AppDa ta\Roaming \styfuihs5 ty.exe" MD5: DAE9EB1454D9B439B74D1E85DBA72223) styfuihs5ty.exe (PID: 6984 cmdline:
"C:\Users\ user\AppDa ta\Roaming \styfuihs5 ty.exe" MD5: DAE9EB1454D9B439B74D1E85DBA72223)
- 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": ["che.ydns.eu:4213", "kamsi.ydns.eu:4213", "kin.ydns.eu:4213"], "SubDirectory": "SubDir", "InstallName": "Client.exe", "MutexName": "50ef7e25-5a45-48c6-8299-131ffa0b5a57", "StartupKey": "Quasar Client Startup", "Tag": "floo", "LogDirectoryName": "Logs", "ServerSignature": "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", "ServerCertificate": "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"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
JoeSecurity_Quasar | Yara detected Quasar RAT | Joe Security | ||
Click to see the 30 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
JoeSecurity_CosturaAssemblyLoader | Yara detected Costura Assembly Loader | Joe Security | ||
Click to see the 20 entries |
System Summary |
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Source: | Author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split): |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-02-20T13:09:46.385017+0100 | 2035595 | 1 | Domain Observed Used for C2 Detected | 45.144.214.107 | 4213 | 192.168.2.6 | 52683 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-02-20T13:09:46.385017+0100 | 2027619 | 1 | Domain Observed Used for C2 Detected | 45.144.214.107 | 4213 | 192.168.2.6 | 52683 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Malware Configuration Extractor: |