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Windows Analysis Report CSxylfUJcL
Overview
General Information
| Sample Name: | CSxylfUJcL (renamed file extension from none to dll) |
| Analysis ID: | 553113 |
| MD5: | fa7ab814336d3ee4312c262457e01f01 |
| SHA1: | 73e1844abe6d99a57345464f418279d596985202 |
| SHA256: | c89c49c3e8e37835ab53bfd9ff9ab97c80e037f0fdfe7e8df6a7d3d86fa62782 |
| Tags: | 32dllexe |
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Most interesting Screenshot:  |
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Detection
Emotet
| Score: | 96 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Found malware configuration
Snort IDS alert for network traffic (e.g. based on Emerging Threat rules)
Multi AV Scanner detection for submitted file
Yara detected Emotet
System process connects to network (likely due to code injection or exploit)
Machine Learning detection for sample
Sigma detected: Suspicious Call by Ordinal
C2 URLs / IPs found in malware configuration
Hides that the sample has been downloaded from the Internet (zone.identifier)
Uses 32bit PE files
Queries the volume information (name, serial number etc) of a device
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to query locales information (e.g. system language)
Deletes files inside the Windows folder
May sleep (evasive loops) to hinder dynamic analysis
Uses code obfuscation techniques (call, push, ret)
Creates files inside the system directory
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to query CPU information (cpuid)
Found potential string decryption / allocating functions
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality to check if a window is minimized (may be used to check if an application is visible)
Contains functionality to dynamically determine API calls
Contains functionality which may be used to detect a debugger (GetProcessHeap)
IP address seen in connection with other malware
Sample file is different than original file name gathered from version info
PE file contains an invalid checksum
PE file contains strange resources
Tries to load missing DLLs
Contains functionality to read the PEB
Drops PE files to the windows directory (C:\Windows)
Contains functionality to open a port and listen for incoming connection (possibly a backdoor)
Detected TCP or UDP traffic on non-standard ports
Checks if the current process is being debugged
Connects to several IPs in different countries
Potential key logger detected (key state polling based)
Registers a DLL
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
Queries disk information (often used to detect virtual machines)
Found large amount of non-executed APIs
Creates a process in suspended mode (likely to inject code)
Classification
AV Detection: |
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| Found malware configuration |
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| Multi AV Scanner detection for submitted file |
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| Machine Learning detection for sample |
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| Uses 32bit PE files |
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Networking: |
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| Snort IDS alert for network traffic (e.g. based on Emerging Threat rules) |
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| System process connects to network (likely due to code injection or exploit) |
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| Internet Provider seen in connection with other malware |
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| Detected TCP or UDP traffic on non-standard ports |
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| Connects to several IPs in different countries |
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