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Windows
Analysis Report
x4ByCNJqst
Overview
General Information
| Sample Name: | x4ByCNJqst (renamed file extension from none to dll) |
| Analysis ID: | 626484 |
| MD5: | 8978c658ba95819f72866e0ffc41fa81 |
| SHA1: | f8eed4cba5ff946b074a9b2f95e2fb92c0427651 |
| SHA256: | 50363092e6becfe6ad91c4118fcb2e9207ebb6d2016de3459d56b41fbc3b61c1 |
| Tags: | exetrojan |
| Infos: |  |
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Detection
Emotet
| Score: | 80 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Multi AV Scanner detection for submitted file
Yara detected Emotet
System process connects to network (likely due to code injection or exploit)
Antivirus detection for URL or domain
Query firmware table information (likely to detect VMs)
Hides that the sample has been downloaded from the Internet (zone.identifier)
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
Found evasive API chain (may stop execution after checking a module file name)
JA3 SSL client fingerprint seen in connection with other malware
Contains functionality to dynamically determine API calls
HTTP GET or POST without a user agent
Program does not show much activity (idle)
IP address seen in connection with other malware
AV process strings found (often used to terminate AV products)
PE file contains an invalid checksum
Tries to load missing DLLs
Drops PE files to the windows directory (C:\Windows)
Checks if the current process is being debugged
Registers a DLL
Queries disk information (often used to detect virtual machines)
Creates a process in suspended mode (likely to inject code)
Classification
- System is w10x64
loaddll64.exe (PID: 4856 cmdline: loaddll64. exe "C:\Us ers\user\D esktop\x4B yCNJqst.dl l" MD5: 4E8A40CAD6CCC047914E3A7830A2D8AA) 
cmd.exe (PID: 5600 cmdline: cmd.exe /C rundll32. exe "C:\Us ers\user\D esktop\x4B yCNJqst.dl l",#1 MD5: 4E2ACF4F8A396486AB4268C94A6A245F) 
rundll32.exe (PID: 6596 cmdline: rundll32.e xe "C:\Use rs\user\De sktop\x4By CNJqst.dll ",#1 MD5: 73C519F050C20580F8A62C849D49215A) - regsvr32.exe (PID: 6608 cmdline:
regsvr32.e xe /s C:\U sers\user\ Desktop\x4 ByCNJqst.d ll MD5: D78B75FC68247E8A63ACBA846182740E) - regsvr32.exe (PID: 6228 cmdline:
C:\Windows \system32\ regsvr32.e xe "C:\Win dows\syste m32\HhAmkC b\GvrdyVBS mSfKAy.dll " MD5: D78B75FC68247E8A63ACBA846182740E) - rundll32.exe (PID: 6112 cmdline:
rundll32.e xe C:\User s\user\Des ktop\x4ByC NJqst.dll, DllRegiste rServer MD5: 73C519F050C20580F8A62C849D49215A) - rundll32.exe (PID: 6360 cmdline:
rundll32.e xe C:\User s\user\Des ktop\x4ByC NJqst.dll, DllUnregis terServer MD5: 73C519F050C20580F8A62C849D49215A)
- svchost.exe (PID: 6860 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 6608 cmdline:
C:\Windows \System32\ svchost.ex e -k Local SystemNetw orkRestric ted -p -s NcbService MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 7140 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 4432 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 3448 cmdline:
C:\Windows \system32\ svchost.ex e -k wusvc s -p -s Wa aSMedicSvc MD5: 32569E403279B3FD2EDB7EBD036273FA)
- cleanup
⊘No configs have been found
| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| Click to see the 3 entries | ||||
| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| JoeSecurity_Emotet_1 | Yara detected Emotet | Joe Security | ||
| Click to see the 3 entries | ||||
⊘No Sigma rule has matched
⊘No Snort rule has matched
Click to jump to signature section
Show All Signature Results
AV Detection |   |
|---|
| Source: | Virustotal: | Perma Link | ||
| Source: | Avira URL Cloud: | ||
| Source: | Avira URL Cloud: | ||
| Source: | HTTPS traffic detected: | ||
| Source: | Static PE information: | ||
| Source: | Binary string: | ||
| Source: | Binary string: | ||
| Source: | Code function: | 5_2_000000018000D26C | |
Networking | |
|---|
| Source: | Network Connect: | Jump to behavior | ||
| Source: | ASN Name: | ||
| Source: | JA3 fingerprint: | ||
| Source: | HTTP traffic detected: | ||
| Source: | IP Address: | ||
| Source: | Network traffic detected: | ||
| Source: | Network traffic detected: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | TCP traffic detected without corresponding DNS query: | ||
| Source: | String found in binary or memory: | ||
| Source: | String found in binary or memory: | ||
| Source: | String found in binary or memory: | ||