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Windows Analysis Report
PvaOeKqrBs

Overview

General Information

Sample Name:PvaOeKqrBs (renamed file extension from none to dll)
Analysis ID:626497
MD5:5b0a144707c9e5dd53159095e47291e1
SHA1:432449e6a17d6f716b51f450b39e7adf57dcb47e
SHA256:465d2a8c2191b49688063d1f30ecfa73e4226a2ad47b699697d1b9cce403e0bf
Tags:exetrojan
Infos:

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)
Antivirus detection for URL or domain
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
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
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: 4716 cmdline: loaddll64.exe "C:\Users\user\Desktop\PvaOeKqrBs.dll" MD5: 4E8A40CAD6CCC047914E3A7830A2D8AA)
    • cmd.exe (PID: 504 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\PvaOeKqrBs.dll",#1 MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
      • rundll32.exe (PID: 4184 cmdline: rundll32.exe "C:\Users\user\Desktop\PvaOeKqrBs.dll",#1 MD5: 73C519F050C20580F8A62C849D49215A)
    • regsvr32.exe (PID: 1512 cmdline: regsvr32.exe /s C:\Users\user\Desktop\PvaOeKqrBs.dll MD5: D78B75FC68247E8A63ACBA846182740E)
      • regsvr32.exe (PID: 992 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\YRMNUhHMATANP\Chucqcozulnvx.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
    • rundll32.exe (PID: 5800 cmdline: rundll32.exe C:\Users\user\Desktop\PvaOeKqrBs.dll,DllRegisterServer MD5: 73C519F050C20580F8A62C849D49215A)
    • rundll32.exe (PID: 4040 cmdline: rundll32.exe C:\Users\user\Desktop\PvaOeKqrBs.dll,DllUnregisterServer MD5: 73C519F050C20580F8A62C849D49215A)
  • svchost.exe (PID: 4404 cmdline: C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s NcbService MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • svchost.exe (PID: 4264 cmdline: c:\windows\system32\svchost.exe -k localservice -p -s CDPSvc MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • svchost.exe (PID: 2232 cmdline: c:\windows\system32\svchost.exe -k networkservice -p -s DoSvc MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • svchost.exe (PID: 2168 cmdline: C:\Windows\System32\svchost.exe -k NetworkService -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • SgrmBroker.exe (PID: 6044 cmdline: C:\Windows\system32\SgrmBroker.exe MD5: D3170A3F3A9626597EEE1888686E3EA6)
  • svchost.exe (PID: 1516 cmdline: c:\windows\system32\svchost.exe -k localservicenetworkrestricted -p -s wscsvc MD5: 32569E403279B3FD2EDB7EBD036273FA)
    • MpCmdRun.exe (PID: 5816 cmdline: "C:\Program Files\Windows Defender\mpcmdrun.exe" -wdenable MD5: A267555174BFA53844371226F482B86B)
      • conhost.exe (PID: 5516 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
  • svchost.exe (PID: 1928 cmdline: C:\Windows\System32\svchost.exe -k netsvcs -p -s BITS MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • svchost.exe (PID: 3516 cmdline: C:\Windows\System32\svchost.exe -k netsvcs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • svchost.exe (PID: 3148 cmdline: C:\Windows\system32\svchost.exe -k wusvcs -p -s WaaSMedicSvc MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • svchost.exe (PID: 5172 cmdline: C:\Windows\System32\svchost.exe -k netsvcs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • svchost.exe (PID: 5284 cmdline: C:\Windows\System32\svchost.exe -k netsvcs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • svchost.exe (PID: 5440 cmdline: C:\Windows\System32\svchost.exe -k netsvcs -p MD5: 32569E403279B3FD2EDB7EBD036273FA)
  • cleanup
No configs have been found
SourceRuleDescriptionAuthorStrings
00000002.00000002.275776071.0000000002740000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
    00000003.00000002.273703004.00000183B38F0000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
      00000002.00000002.276242433.0000000180001000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
        00000004.00000002.274401270.0000022FCAD50000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
          00000004.00000002.274154902.0000000180001000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
            Click to see the 3 entries
            SourceRuleDescriptionAuthorStrings
            4.2.rundll32.exe.22fcad50000.1.raw.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
              6.2.regsvr32.exe.2350000.1.raw.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                2.2.regsvr32.exe.2740000.0.raw.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                  2.2.regsvr32.exe.2740000.0.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                    6.2.regsvr32.exe.2350000.1.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                      Click to see the 3 entries
                      No Sigma rule has matched
                      No Snort rule has matched