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Windows Analysis Report
yoyrJ.dll

Overview

General Information

Sample Name:yoyrJ.dll
Analysis ID:750476
MD5:dd7105e9748a29b5bd61ea57214d57e3
SHA1:827b323bda769ba7fb838a231aa4160209266b14
SHA256:c987ad0cc79b598bdee9ec7da96b07e82a04cadd73cb3caf85b799731deef9a1
Infos:

Detection

Emotet
Score:100
Range:0 - 100
Whitelisted:false
Confidence:100%

Signatures

Multi AV Scanner detection for submitted file
Malicious sample detected (through community Yara rule)
Yara detected Emotet
System process connects to network (likely due to code injection or exploit)
Antivirus detection for URL or domain
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
Yara signature match
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
Sample execution stops while process was sleeping (likely an evasion)
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
Found a high number of Window / User specific system calls (may be a loop to detect user behavior)
PE file contains an invalid checksum
Tries to load missing DLLs
Drops PE files to the windows directory (C:\Windows)
Detected TCP or UDP traffic on non-standard ports
Connects to several IPs in different countries
Registers a DLL
Creates a process in suspended mode (likely to inject code)

Classification

  • System is w10x64
  • loaddll64.exe (PID: 3692 cmdline: loaddll64.exe "C:\Users\user\Desktop\yoyrJ.dll" MD5: C676FC0263EDD17D4CE7D644B8F3FCD6)
    • conhost.exe (PID: 3096 cmdline: C:\Windows\system32\conhost.exe 0xffffffff -ForceV1 MD5: EA777DEEA782E8B4D7C7C33BBF8A4496)
    • cmd.exe (PID: 976 cmdline: cmd.exe /C rundll32.exe "C:\Users\user\Desktop\yoyrJ.dll",#1 MD5: 4E2ACF4F8A396486AB4268C94A6A245F)
      • rundll32.exe (PID: 5288 cmdline: rundll32.exe "C:\Users\user\Desktop\yoyrJ.dll",#1 MD5: 73C519F050C20580F8A62C849D49215A)
        • regsvr32.exe (PID: 5412 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\RPhOZPFULSaJ\nMwLrZYwR.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
        • WMIADAP.exe (PID: 5412 cmdline: wmiadap.exe /F /T /R MD5: 9783D0765F31980950445DFD40DB15DA)
    • regsvr32.exe (PID: 5020 cmdline: regsvr32.exe /s C:\Users\user\Desktop\yoyrJ.dll MD5: D78B75FC68247E8A63ACBA846182740E)
      • regsvr32.exe (PID: 5908 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\UgFJoEzLBQVtMeg\qohQcmrlRynEDAUP.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
    • rundll32.exe (PID: 5284 cmdline: rundll32.exe C:\Users\user\Desktop\yoyrJ.dll,DllRegisterServer MD5: 73C519F050C20580F8A62C849D49215A)
      • regsvr32.exe (PID: 4644 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\YbSMYJyTdzumryV\WWgeEzfCEnB.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
    • regsvr32.exe (PID: 5132 cmdline: C:\Windows\system32\regsvr32.exe "C:\Windows\system32\OGxcy\dYkxHTuA.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
    • regsvr32.exe (PID: 5132 cmdline: C:\Windows\system32\regsvr32.exe" "C:\Windows\system32\UgFJoEzLBQVtMeg\qohQcmrlRynEDAUP.dll MD5: D78B75FC68247E8A63ACBA846182740E)
      • regsvr32.exe (PID: 4192 cmdline: C:\Windows\system32\regsvr32.exe "C:\Users\user\AppData\Local\ArkmTuxCaKyXkTDZ\fBEZnVEOT.dll" MD5: D78B75FC68247E8A63ACBA846182740E)
  • cleanup
{"C2 list": ["173.255.211.88:443", "45.63.99.23:7080", "182.162.143.56:443", "91.187.140.35:8080", "212.24.98.99:8080", "119.59.103.152:8080", "45.235.8.30:8080", "172.104.251.154:8080", "72.15.201.15:8080", "169.57.156.166:8080", "103.75.201.2:443", "213.239.212.5:443", "164.90.222.65:443", "201.94.166.162:443", "94.23.45.86:4143", "183.111.227.137:8080", "186.194.240.217:443", "107.170.39.149:8080", "147.139.166.154:8080", "5.135.159.50:443", "206.189.28.199:8080", "104.168.155.143:8080", "129.232.188.93:443", "82.223.21.224:8080", "103.43.75.120:443", "103.132.242.26:8080", "139.59.56.73:8080", "164.68.99.3:8080", "202.129.205.3:8080", "167.172.199.165:8080", "110.232.117.186:8080", "209.97.163.214:443", "167.172.253.162:8080", "1.234.2.232:8080", "159.65.88.10:8080", "95.217.221.146:8080", "153.92.5.27:8080", "91.207.28.33:8080", "188.44.20.25:443", "153.126.146.25:7080", "163.44.196.120:8080", "172.105.226.75:8080", "115.68.227.76:8080", "159.65.140.115:443", "139.59.126.41:443", "197.242.150.244:8080", "45.176.232.124:443", "45.118.115.99:8080", "149.56.131.28:8080", "79.137.35.198:8080", "173.212.193.249:8080", "160.16.142.56:8080", "159.89.202.34:443", "185.4.135.165:8080"], "Public Key": ["RUNTMSAAAABAX3S2xNjcDD0fBno33Ln5t71eii+mofIPoXkNFOX1MeiwCh48iz97kB0mJjGGZXwardnDXKxI8GCHGNl0PFj5J0rtUQAbAIw=", "RUNLMSAAAADzozW1Di4r9DVWzQpMKT588RDdy7BPILP6AiDOTLYMHkSWvrQO5slbmr1OvZ2Pz+AQWzRMggQmAtO6rPH7nyx2AkoOUQAUAJA="]}
SourceRuleDescriptionAuthorStrings
00000007.00000002.828364693.0000000180001000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
    00000007.00000002.828364693.0000000180001000.00000020.00001000.00020000.00000000.sdmpWindows_Trojan_Emotet_db7d33faunknownunknown
    • 0x171c2:$chunk_0: 4C 8D 9C 24 80 00 00 00 8B C3 49 8B 5B 10 49 8B 73 18 49 8B 7B 20 49 8B E3 5D C3
    • 0x2a90c:$chunk_0: 4C 8D 9C 24 80 00 00 00 8B C3 49 8B 5B 10 49 8B 73 18 49 8B 7B 20 49 8B E3 5D C3
    • 0x24ac0:$chunk_1: 8B C7 41 0F B7 4C 45 00 41 8B 1C 8C 48 03 DD 48 3B DE 72 1B
    • 0x1b568:$chunk_2: 48 8B C4 48 89 48 08 48 89 50 10 4C 89 40 18 4C 89 48 20 C3
    • 0x216e4:$chunk_4: 48 39 3B 4C 8D 9C 24 80 00 00 00 49 8B 5B 10 49 8B 73 18 40 0F 95 C7 8B C7 49 8B 7B 20 49 8B E3 5D C3
    • 0x2ae01:$chunk_4: 48 39 3B 4C 8D 9C 24 80 00 00 00 49 8B 5B 10 49 8B 73 20 40 0F 95 C7 8B C7 49 8B 7B 28 49 8B E3 5D C3
    • 0x24ad4:$chunk_6: 43 8B 84 FE 8C 00 00 00 48 03 C6 48 3B D8 73 0B
    0000000C.00000002.496080462.0000000000D20000.00000040.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
      0000000C.00000002.496080462.0000000000D20000.00000040.00001000.00020000.00000000.sdmpWindows_Trojan_Emotet_db7d33faunknownunknown
      • 0x175c2:$chunk_0: 4C 8D 9C 24 80 00 00 00 8B C3 49 8B 5B 10 49 8B 73 18 49 8B 7B 20 49 8B E3 5D C3
      • 0x2ad0c:$chunk_0: 4C 8D 9C 24 80 00 00 00 8B C3 49 8B 5B 10 49 8B 73 18 49 8B 7B 20 49 8B E3 5D C3
      • 0x24ec0:$chunk_1: 8B C7 41 0F B7 4C 45 00 41 8B 1C 8C 48 03 DD 48 3B DE 72 1B
      • 0x1b968:$chunk_2: 48 8B C4 48 89 48 08 48 89 50 10 4C 89 40 18 4C 89 48 20 C3
      • 0x21ae4:$chunk_4: 48 39 3B 4C 8D 9C 24 80 00 00 00 49 8B 5B 10 49 8B 73 18 40 0F 95 C7 8B C7 49 8B 7B 20 49 8B E3 5D C3
      • 0x2b201:$chunk_4: 48 39 3B 4C 8D 9C 24 80 00 00 00 49 8B 5B 10 49 8B 73 20 40 0F 95 C7 8B C7 49 8B 7B 28 49 8B E3 5D C3
      • 0x24ed4:$chunk_6: 43 8B 84 FE 8C 00 00 00 48 03 C6 48 3B D8 73 0B
      00000000.00000002.322442190.0000000180001000.00000020.00001000.00020000.00000000.sdmpJoeSecurity_Emotet_1Yara detected EmotetJoe Security
        Click to see the 20 entries
        SourceRuleDescriptionAuthorStrings
        0.2.loaddll64.exe.141aeea0000.0.raw.unpackJoeSecurity_Emotet_1Yara detected EmotetJoe Security
          0.2.loaddll64.exe.141aeea0000.0.raw.unpackWindows_Trojan_Emotet_db7d33faunknownunknown
          • 0x175c2:$chunk_0: 4C 8D 9C 24 80 00 00 00 8B C3 49 8B 5B 10 49 8B 73 18 49 8B 7B 20 49 8B E3 5D C3
          • 0x2ad0c:$chunk_0: 4C 8D 9C 24 80 00 00 00 8B C3 49 8B 5B 10 49 8B 73 18 49 8B 7B 20 49 8B E3 5D C3
          • 0x24ec0:$chunk_1: 8B C7 41 0F B7 4C 45 00 41 8B 1C 8C 48 03 DD 48 3B DE 72 1B
          • 0x1b968:$chunk_2: 48 8B C4 48 89 48 08 48 89 50 10 4C 89 40 18 4C 89 48 20 C3
          • 0x21ae4:$chunk_4: 48 39 3B 4C 8D 9C 24 80 00 00 00 49 8B 5B 10 49 8B 73 18 40 0F 95 C7 8B C7 49 8B 7B 20 49 8B E3 5D C3