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Windows
Analysis Report
yj81rxDZIp.dll
Overview
General Information
| Sample Name: | yj81rxDZIp.dll |
| Analysis ID: | 626482 |
| MD5: | 4f1cdae4390ecb862267f2eaaf826c74 |
| SHA1: | 082de69d51991350ddfc05350073a55571c3ce5d |
| SHA256: | c4e2c26fd37189447fcd387393974199933fdbffaadf2faaaac5347d1b0a8ef5 |
| Tags: | exetrojan |
| Infos: |  |
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Detection
Emotet
| Score: | 84 |
| 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)
Snort IDS alert for network traffic
Query firmware table information (likely to detect VMs)
Changes security center settings (notifications, updates, antivirus, firewall)
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
Checks if Antivirus/Antispyware/Firewall program is installed (via WMI)
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
Sample execution stops while process was sleeping (likely an evasion)
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
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: 6396 cmdline: loaddll64. exe "C:\Us ers\user\D esktop\yj8 1rxDZIp.dl l" MD5: 4E8A40CAD6CCC047914E3A7830A2D8AA) 
cmd.exe (PID: 6404 cmdline: cmd.exe /C rundll32. exe "C:\Us ers\user\D esktop\yj8 1rxDZIp.dl l",#1 MD5: 4E2ACF4F8A396486AB4268C94A6A245F) 
rundll32.exe (PID: 6424 cmdline: rundll32.e xe "C:\Use rs\user\De sktop\yj81 rxDZIp.dll ",#1 MD5: 73C519F050C20580F8A62C849D49215A) - regsvr32.exe (PID: 6536 cmdline:
C:\Windows \system32\ regsvr32.e xe "C:\Win dows\syste m32\NaMuLv bxXsNvT\Lk Wax.dll" MD5: D78B75FC68247E8A63ACBA846182740E) - regsvr32.exe (PID: 6412 cmdline:
regsvr32.e xe /s C:\U sers\user\ Desktop\yj 81rxDZIp.d ll MD5: D78B75FC68247E8A63ACBA846182740E) - rundll32.exe (PID: 6440 cmdline:
rundll32.e xe C:\User s\user\Des ktop\yj81r xDZIp.dll, DllRegiste rServer MD5: 73C519F050C20580F8A62C849D49215A) - rundll32.exe (PID: 6488 cmdline:
rundll32.e xe C:\User s\user\Des ktop\yj81r xDZIp.dll, DllUnregis terServer MD5: 73C519F050C20580F8A62C849D49215A)
- svchost.exe (PID: 6584 cmdline:
C:\Windows \System32\ svchost.ex e -k Local SystemNetw orkRestric ted -p -s NcbService MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 6620 cmdline:
c:\windows \system32\ svchost.ex e -k local service -p -s CDPSvc MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 6752 cmdline:
c:\windows \system32\ svchost.ex e -k netwo rkservice -p -s DoSv c MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 6788 cmdline:
C:\Windows \System32\ svchost.ex e -k Netwo rkService -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
- SgrmBroker.exe (PID: 6892 cmdline:
C:\Windows \system32\ SgrmBroker .exe MD5: D3170A3F3A9626597EEE1888686E3EA6)
- svchost.exe (PID: 6924 cmdline:
c:\windows \system32\ svchost.ex e -k local servicenet workrestri cted -p -s wscsvc MD5: 32569E403279B3FD2EDB7EBD036273FA) 
MpCmdRun.exe (PID: 6992 cmdline: "C:\Progra m Files\Wi ndows Defe nder\mpcmd run.exe" - wdenable MD5: A267555174BFA53844371226F482B86B) - conhost.exe (PID: 6996 cmdline:
C:\Windows \system32\ conhost.ex e 0xffffff ff -ForceV 1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
- svchost.exe (PID: 5404 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p -s B ITS MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 4756 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 4668 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 5784 cmdline:
C:\Windows \system32\ svchost.ex e -k wusvc s -p -s Wa aSMedicSvc MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 3280 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
- svchost.exe (PID: 6508 cmdline:
C:\Windows \System32\ svchost.ex e -k netsv cs -p 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
| Timestamp: | 192.168.2.5150.95.66.1244977580802404312 05/14/22-04:33:59.725234 |
| SID: | 2404312 |
| Source Port: | 49775 |
| Destination Port: | 8080 |
| Protocol: | TCP |
| Classtype: | A Network Trojan was detected |
Click to jump to signature section
Show All Signature Results
AV Detection |   |
|---|
| Source: | Virustotal: | Perma Link | ||
| Source: | HTTPS traffic detected: | ||
| Source: | Static PE information: | ||
| Source: | Binary string: | ||
| Source: | Binary string: | ||
| Source: | Code function: | ||
Networking | |
|---|
| Source: | Network Connect: | ||
| Source: | Snort IDS: | ||
| 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: | 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: | ||