Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
BiiRGnhWx8.exe

Overview

General Information

Sample Name:BiiRGnhWx8.exe (renamed file extension from exe to dll)
Analysis ID:745045
MD5:d9984f38618baca5ed43e0f2cbe59b0b
SHA1:10581c60d1ea45385f9bbfa6bb62e66b29ce14c6
SHA256:eac5c6cd3836bed3cfee274587583fa29a629d0bb7ce3aa54a2691c69329d307
Tags:dllexe
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)
Snort IDS alert for network traffic
Creates an autostart registry key pointing to binary in C:\Windows
C2 URLs / IPs found in malware configuration
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)
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
PE file contains sections with non-standard names
Internet Provider seen in connection with other malware
Detected potential crypto function
Contains functionality to query CPU information (cpuid)
Sample execution stops while process was sleeping (likely an evasion)
Contains functionality which may be used to detect a debugger (GetProcessHeap)
IP address seen in connection with other malware
Tries to load missing DLLs
Drops PE files to the windows directory (C:\Windows)
Connects to several IPs in different countries
Registers a DLL
Found large amount of non-executed APIs
Uses Microsoft's Enhanced Cryptographic Provider
Creates a process in suspended mode (likely to inject code)

Classification

Process Tree

  • System is w10x64
  • loaddll64.exe (PID: 4556 cmdline: loaddll64.exe "C:\Users\user\Desktop\BiiRGnhWx8.dll" MD5: C676FC0263EDD17D4CE7D644B8F3FCD6)
    • conhost.exe (PID: 3096 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • cmd.exe (PID: 5932 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\BiiRGnhWx8.dll",#1 MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
      • rundll32.exe (PID: 3088 cmdline: rundll32.exe "C:\Users\user\Desktop\BiiRGnhWx8.dll",#1 MD5: 73C519F050C20580F8A62C849D49215A)
        • regsvr32.exe (PID: 1064 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\JEHCjtepagfsrQz\jHBB.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
    • regsvr32.exe (PID: 5104 cmdline: regsvr32.exe /s C:\Users\user\Desktop\BiiRGnhWx8.dll MD5: D78B75FC68247E8A63ACBA846182740E)
      • regsvr32.exe (PID: 4684 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\IDqnZePrFBC\qFcZEWbJbr.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
    • rundll32.exe (PID: 6088 cmdline: rundll32.exe C:\Users\user\Desktop\BiiRGnhWx8.dll,DllRegisterServer MD5: 73C519F050C20580F8A62C849D49215A)
      • regsvr32.exe (PID: 3692 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\HdSKRzl\HIWJamnkzbbhMRYe.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
    • regsvr32.exe (PID: 2904 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\FTRWInMVKbBAM\OqXi.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
  • regsvr32.exe (PID: 4520 cmdline: C:\Windows\system32\regsvr32.exe" "C:\Windows\system32\JEHCjtepagfsrQz\jHBB.dll MD5: D78B75FC68247E8A63ACBA846182740E)
    • regsvr32.exe (PID: 1792 cmdline: C:\Windows\system32\regsvr32.exe "C:\Users\user\AppData\Local\CFQcAaf\alGqQjfnqeipsC.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
  • cleanup

Malware Configuration

Threatname: Emotet

{"C2 list": ["172.105.115.71:8080", "218.38.121.17:443", "186.250.48.5:443", "103.71.99.57:8080", "85.214.67.203:8080", "85.25.120.45:8080", "139.196.72.155:8080", "103.85.95.4:8080", "198.199.70.22:8080", "209.239.112.82:8080", "78.47.204.80:443", "36.67.23.59:443", "104.244.79.94:443", "62.171.178.147:8080", "195.77.239.39:8080", "103.56.149.105:8080", "80.211.107.116:8080", "93.104.209.107:8080", "174.138.33.49:7080", "202.28.34.99:8080", "178.62.112.199:8080", "114.79.130.68:443", "118.98.72.86:443", "103.41.204.169:8080", "178.238.225.252:8080", "83.229.80.93:8080", "46.101.98.60:8080", "82.98.180.154:7080", "87.106.97.83:7080", "196.44.98.190:8080", "139.59.80.108:8080", "103.224.241.74:8080", "103.254.12.236:7080", "185.148.169.10:8080", "165.22.254.236:8080", "37.44.244.177:8080", "54.37.228.122:443", "51.75.33.122:443", "128.199.217.206:443", "188.165.79.151:443", "210.57.209.142:8080", "160.16.143.191:8080", "175.126.176.79:8080", "202.134.4.210:7080", "103.126.216.86:443", "190.145.8.4:443", "128.199.242.164:8080", "64.227.55.231:8080"]}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000004.00000002.309150934.0000000180001000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
    00000005.00000002.310055667.00000244E2B30000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
      00000005.00000002.309378650.0000000180001000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
        00000004.00000002.309402983.00000190E8B40000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
          00000000.00000002.316269438.00000239F3890000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
            Click to see the 7 entries

            Unpacked PEs

            SourceRuleDescriptionAuthorStrings
            0.2.loaddll64.exe.239f3890000.0.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
              12.2.regsvr32.exe.3b0000.0.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                4.2.rundll32.exe.190e8b40000.0.raw.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                  3.2.regsvr32.exe.21d0000.0.raw.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                    3.2.regsvr32.exe.21d0000.0.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                      Click to see the 7 entries

                      Sigma Signatures

                      ⊘No Sigma rule has matched

                      Snort Signatures

                      Timestamp:192.168.2.5115.178.55.2249705802404304 11/13/22-18:17:19.238937
                      SID:2404304
                      Source Port:49705
                      Destination Port:80
                      Protocol:TCP
                      Classtype:A Network Trojan was detected

                      Joe Sandbox Signatures

                      Click to jump to signature section

                      Show All Signature Results

                      AV Detection

                      barindex
                      Multi AV Scanner detection for submitted file
                      Source: BiiRGnhWx8.dllVirustotal: Detection: 43%Perma Link
                      Source: 00000006.00000002.820471060.00000000005FA000.00000004.00000020.00020000.00000000.sdmpMalware Configuration Extractor: Emotet {"C2 list": ["172.105.115.71:8080", "218.38.121.17:443", "186.250.48.5:443", "103.71.99.57:8080", "85.214.67.203:8080", "85.25.120.45:8080", "139.196.72.155:8080", "103.85.95.4:8080", "198.199.70.22:8080", "209.239.112.82:8080", "78.47.204.80:443", "36.67.23.59:443", "104.244.79.94:443", "62.171.178.147:8080", "195.77.239.39:8080", "103.56.149.105:8080", "80.211.107.116:8080", "93.104.209.107:8080", "174.138.33.49:7080", "202.28.34.99:8080", "178.62.112.199:8080", "114.79.130.68:443", "118.98.72.86:443", "103.41.204.169:8080", "178.238.225.252:8080", "83.229.80.93:8080", "46.101.98.60:8080", "82.98.180.154:7080", "87.106.97.83:7080", "196.44.98.190:8080", "139.59.80.108:8080", "103.224.241.74:8080", "103.254.12.236:7080", "185.148.169.10:8080", "165.22.254.236:8080", "37.44.244.177:8080", "54.37.228.122:443", "51.75.33.122:443", "128.199.217.206:443", "188.165.79.151:443", "210.57.209.142:8080", "160.16.143.191:8080", "175.126.176.79:8080", "202.134.4.210:7080", "103.126.216.86:443", "190.145.8.4:443", "128.199.242.164:8080", "64.227.55.231:8080"]}
                      Source: C:\Windows\System32\loaddll64.exeCode function: 0_2_00007FFA0AE79410 CryptStringToBinaryA,CryptStringToBinaryA,0_2_00007FFA0AE79410
                      Source: C:\Windows\System32\regsvr32.exeCode function: 3_2_00007FFA0AE79410 CryptStringToBinaryA,CryptStringToBinaryA,3_2_00007FFA0AE79410
                      Source: BiiRGnhWx8.dllStatic PE information: HIGH_ENTROPY_VA, DYNAMIC_BASE, NX_COMPAT
                      Source: C:\Windows\System32\loaddll64.exeCode function: 0_2_00007FFA0AE6C334 FindFirstFileExW,0_2_00007FFA0AE6C334
                      Source: C:\Windows\System32\regsvr32.exeCode function: 3_2_00007FFA0AE6C334 FindFirstFileExW,3_2_00007FFA0AE6C334

                      Networking