Joe Sandbox Cloud Basic Analysis Report

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Windows Analysis Report
UC2DFXQIBiE2kQ.dll

Overview

General Information

Sample Name:UC2DFXQIBiE2kQ.dll
Analysis ID:747451
MD5:e2ec88ae31e147d1976368c6a8988d3c
SHA1:937a21ced7f2663c923c9c614cbe06d95def511a
SHA256:ae7e655db35a71a3b2df96051d722d7995ec94feea3cbd59bec501042ab40847
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)
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
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)
Found potential string decryption / allocating functions
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)
Checks if the current process is being debugged
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: 6100 cmdline: loaddll64.exe "C:\Users\user\Desktop\UC2DFXQIBiE2kQ.dll" MD5: C676FC0263EDD17D4CE7D644B8F3FCD6)
    • conhost.exe (PID: 6088 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • cmd.exe (PID: 4804 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\UC2DFXQIBiE2kQ.dll",#1 MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
      • rundll32.exe (PID: 4688 cmdline: rundll32.exe "C:\Users\user\Desktop\UC2DFXQIBiE2kQ.dll",#1 MD5: 73C519F050C20580F8A62C849D49215A)
    • regsvr32.exe (PID: 5220 cmdline: regsvr32.exe /s C:\Users\user\Desktop\UC2DFXQIBiE2kQ.dll MD5: D78B75FC68247E8A63ACBA846182740E)
      • regsvr32.exe (PID: 1392 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\IUvcffQnjRFArsrM\JZgYREHBQT.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
    • rundll32.exe (PID: 4720 cmdline: rundll32.exe C:\Users\user\Desktop\UC2DFXQIBiE2kQ.dll,ACeujVZMknFDjv MD5: 73C519F050C20580F8A62C849D49215A)
    • rundll32.exe (PID: 2608 cmdline: rundll32.exe C:\Users\user\Desktop\UC2DFXQIBiE2kQ.dll,AHuDGMflBfPryOEYjuTfbzJdEM MD5: 73C519F050C20580F8A62C849D49215A)
    • rundll32.exe (PID: 5292 cmdline: rundll32.exe C:\Users\user\Desktop\UC2DFXQIBiE2kQ.dll,ATjQPkInxPUGuUu MD5: 73C519F050C20580F8A62C849D49215A)
  • regsvr32.exe (PID: 3952 cmdline: C:\Windows\system32\regsvr32.exe" "C:\Windows\system32\IUvcffQnjRFArsrM\JZgYREHBQT.dll MD5: D78B75FC68247E8A63ACBA846182740E)
    • regsvr32.exe (PID: 2220 cmdline: C:\Windows\system32\regsvr32.exe "C:\Users\user\AppData\Local\ZamKJmwegN\JeCOx.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"], "Public Key": ["RUNTMSAAAAD0LxqDNhonUYwk8sqo7IWuUllRdUiUBnACc6romsQoe1YJD7wIe4AheqYofpZFucPDXCZ0z9i+ooUffqeoLZU0IzjStTgSAJI=", "RUNLMSAAAADYNZPXY4tQxd/N4Wn5sTYAm5tUOxY2ol1ELrI4MNhHNi640vSLasjYTHpFRBoG+o84vtr7AJachCzOHjaAJFCW/zgWtVYeAJA="]}

Yara Signatures

Memory Dumps

SourceRuleDescriptionAuthorStrings
00000007.00000002.769739205.0000000002E41000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
    00000007.00000002.769387929.0000000001540000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
      00000004.00000002.250855705.000001D676C81000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
        00000005.00000002.251110585.000001FB00141000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
          00000005.00000002.250957440.000001FB00100000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
            Click to see the 7 entries

            Unpacked PEs

            SourceRuleDescriptionAuthorStrings
            5.2.rundll32.exe.1fb00100000.0.raw.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
              3.2.regsvr32.exe.960000.0.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                5.2.rundll32.exe.1fb00100000.0.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                  4.2.rundll32.exe.1d676b30000.0.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                    6.2.rundll32.exe.1cc28be0000.0.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
                      Click to see the 7 entries

                      Sigma Signatures

                      ⊘No Sigma rule has matched

                      Snort Signatures

                      Timestamp:192.168.2.6115.178.55.2249714802404304 11/16/22-11:49:29.070302
                      SID:2404304
                      Source Port:49714
                      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: UC2DFXQIBiE2kQ.dllReversingLabs: Detection: 80%
                      Source: 00000007.00000002.768477022.0000000001318000.00000004.00000020.00020000.00000000.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"], "Public Key": ["RUNTMSAAAAD0LxqDNhonUYwk8sqo7IWuUllRdUiUBnACc6romsQoe1YJD7wIe4AheqYofpZFucPDXCZ0z9i+ooUffqeoLZU0IzjStTgSAJI=", "RUNLMSAAAADYNZPXY4tQxd/N4Wn5sTYAm5tUOxY2ol1ELrI4MNhHNi640vSLasjYTHpFRBoG+o84vtr7AJachCzOHjaAJFCW/zgWtVYeAJA="]}
                      Source: C:\Windows\System32\regsvr32.exeCode function: 3_2_000000018004A020 CryptStringToBinaryA,CryptStringToBinaryA,3_2_000000018004A020
                      Source: C:\Windows\System32\regsvr32.exeCode function: 3_2_0000000180029290 FindFirstFileExW,3_2_0000000180029290
                      Source: C:\Windows\System32\regsvr32.exeCode function: 3_2_000000018002972C FindFirstFileExW,FindNextFileW,FindClose,3_2_000000018002972C
                      Source: C:\Windows\System32\regsvr32.exeCode function: 3_2_0000000180028B30 _invalid_parameter_noinfo,_invalid_parameter_noinfo,FindFirstFileExW,FindNextFileW,FindClose,FindClose,FindClose,3_2_0000000180028B30
                      Source: C:\Windows\System32\regsvr32.exeCode function: 3_2_0000000180028B30 _invalid_parameter_noinfo,_invalid_parameter_noinfo,FindFirstFileExW,FindNextFileW,FindClose