Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    26/05/2022, 13:03

General

  • Target
    TNZRPB2F2YpS.dll
  • Size 342KB
  • Sample220526-qaf1tsfebr
  • SHA256 5478e90e2d42676ac423516709111caf32a9eaecad52ccd36f82d1b9ba2e1ca3
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • emotet

Botnet
  • Epoch2

C2
  • 32.40.0.32:10240

  • 40.0.32.40:32

  • 0.32.40.0:8232

  • 146.76.207.79:25600

  • 146.85.207.88:25856

  • 146.122.207.113:26112

  • 146.3.207.10:26368

  • 146.40.207.35:26624

  • 146.49.207.60:26880

  • 146.198.207.213:27136

  • 146.239.207.238:27392

  • 146.244.207.135:27648

  • 146.157.207.144:27904

  • 146.162.207.169:28160

  • 178.172.100.69:2560

  • 189.69.100.94:2816

  • 189.94.100.119:3072

  • 189.119.100.0:3328

  • 189.8.100.25:3584

  • 189.33.100.50:3840

rsa_pubkey.plain

Signatures

  • Emotet

    Emotet is a trojan that is primarily spread through spam emails.

  • Blocklisted process makes network request 6 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in System32 directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\TNZRPB2F2YpS.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2712
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\TNZRPB2F2YpS.dll,#1
      2⤵
      • Drops file in System32 directory
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:4780
      • C:\Windows\SysWOW64\rundll32.exe
        C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Wyihtogcwhw\svtfowvrli.scb",zFYFx
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:2972
        • C:\Windows\SysWOW64\rundll32.exe
          C:\Windows\SysWOW64\rundll32.exe "C:\Windows\System32\Wyihtogcwhw\svtfowvrli.scb",#1
          4⤵
          • Blocklisted process makes network request
          • Loads dropped DLL
          • Suspicious behavior: EnumeratesProcesses
          PID:364

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        svtfowvrli.scb

        • Path C:\Windows\SysWOW64\Wyihtogcwhw\svtfowvrli.scb
        • Size 342KB
        • SHA256 5478e90e2d42676ac423516709111caf32a9eaecad52ccd36f82d1b9ba2e1ca3
        • MD5 SHA1 SHA512 SSDEEP

        svtfowvrli.scb

        • Path C:\Windows\SysWOW64\Wyihtogcwhw\svtfowvrli.scb
        • Size 342KB
        • SHA256 5478e90e2d42676ac423516709111caf32a9eaecad52ccd36f82d1b9ba2e1ca3
        • MD5 SHA1 SHA512 SSDEEP

        memory/364-138-0x0000000010000000-0x000000001005B000-memory.dmp

        memory/2972-136-0x0000000010000000-0x0000000010023000-memory.dmp

        memory/4780-131-0x0000000001490000-0x00000000014B0000-memory.dmp

        memory/4780-132-0x0000000010000000-0x000000001005B000-memory.dmp