Analysis

  • max time kernel
    119s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    12/11/2024, 11:46

General

  • Target
    d78ba548f0257562b3467e1319f40abc609b3d737c47868c5e669a8c8774eca8.exe
  • Size 800KB
  • Sample241112-nxeeeasbkk
  • SHA256 d78ba548f0257562b3467e1319f40abc609b3d737c47868c5e669a8c8774eca8
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • berbew

C2
  • http://f/wcmd.htm

  • http://f/ppslog.php

  • http://f/piplog.php?%s:%i:%i:%s:%09u:%i:%02d:%02d:%02d

Signatures

  • Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 14 IoCs
  • Berbew

    Berbew is a backdoor written in C++.

  • Berbew family
  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 18 IoCs
  • Drops file in System32 directory 21 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Modifies registry class 24 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d78ba548f0257562b3467e1319f40abc609b3d737c47868c5e669a8c8774eca8.exe
    "C:\Users\Admin\AppData\Local\Temp\d78ba548f0257562b3467e1319f40abc609b3d737c47868c5e669a8c8774eca8.exe"
    1⤵
    • Adds autorun key to be loaded by Explorer.exe on startup
    • Loads dropped DLL
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2372
    • C:\Windows\SysWOW64\Cnkicn32.exe
      C:\Windows\system32\Cnkicn32.exe
      2⤵
      • Adds autorun key to be loaded by Explorer.exe on startup
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:2836
      • C:\Windows\SysWOW64\Ckoilb32.exe
        C:\Windows\system32\Ckoilb32.exe
        3⤵
        • Adds autorun key to be loaded by Explorer.exe on startup
        • Executes dropped EXE
        • Loads dropped DLL
        • Drops file in System32 directory
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        • Suspicious use of WriteProcessMemory
        PID:3012
        • C:\Windows\SysWOW64\Cjfccn32.exe
          C:\Windows\system32\Cjfccn32.exe
          4⤵
          • Adds autorun key to be loaded by Explorer.exe on startup
          • Executes dropped EXE
          • Loads dropped DLL
          • Drops file in System32 directory
          • System Location Discovery: System Language Discovery
          • Modifies registry class
          • Suspicious use of WriteProcessMemory
          PID:2444
          • C:\Windows\SysWOW64\Dfdjhndl.exe
            C:\Windows\system32\Dfdjhndl.exe
            5⤵
            • Adds autorun key to be loaded by Explorer.exe on startup
            • Executes dropped EXE
            • Loads dropped DLL
            • Drops file in System32 directory
            • System Location Discovery: System Language Discovery
            • Modifies registry class
            • Suspicious use of WriteProcessMemory
            PID:2640
            • C:\Windows\SysWOW64\Edkcojga.exe
              C:\Windows\system32\Edkcojga.exe
              6⤵
              • Adds autorun key to be loaded by Explorer.exe on startup
              • Executes dropped EXE
              • Loads dropped DLL
              • Drops file in System32 directory
              • System Location Discovery: System Language Discovery
              • Modifies registry class
              • Suspicious use of WriteProcessMemory
              PID:2780
              • C:\Windows\SysWOW64\Efaibbij.exe
                C:\Windows\system32\Efaibbij.exe
                7⤵
                • Adds autorun key to be loaded by Explorer.exe on startup
                • Executes dropped EXE
                • Loads dropped DLL
                • Drops file in System32 directory
                • System Location Discovery: System Language Discovery
                • Modifies registry class
                • Suspicious use of WriteProcessMemory
                PID:2208
                • C:\Windows\SysWOW64\Fkckeh32.exe
                  C:\Windows\system32\Fkckeh32.exe
                  8⤵
                  • Executes dropped EXE
                  • System Location Discovery: System Language Discovery
                  • Suspicious use of WriteProcessMemory
                  PID:1692
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 1692 -s 140
                    9⤵
                    • Loads dropped DLL
                    • Program crash
                    PID:2988

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        Cjfccn32.exe

        • Path C:\Windows\SysWOW64\Cjfccn32.exe
        • Size 800KB
        • SHA256 198b665cd0f96a26a8e89382f83ec8e846fdc68a82f91d4b0d004d180869d608
        • MD5 SHA1 SHA512 SSDEEP

        Efaibbij.exe

        • Path C:\Windows\SysWOW64\Efaibbij.exe
        • Size 800KB
        • SHA256 ddc7de03824a6b49c0027b97e83aa8f9a5977e6c74e6f1e0e18423d6bc112d33
        • MD5 SHA1 SHA512 SSDEEP

        Gogcek32.dll

        • Path C:\Windows\SysWOW64\Gogcek32.dll
        • Size 7KB
        • SHA256 aefe36dac950ef4f500b04e4f1bfb3caa954523bedbed92ff0a8d43a3a7b14db
        • MD5 SHA1 SHA512 SSDEEP

        Ckoilb32.exe

        • Path \Windows\SysWOW64\Ckoilb32.exe
        • Size 800KB
        • SHA256 a304d603c43ad207ef79d7f98207a5e9a024bc3f744e3860d540276c7f4c4d21
        • MD5 SHA1 SHA512 SSDEEP

        Cnkicn32.exe

        • Path \Windows\SysWOW64\Cnkicn32.exe
        • Size 800KB
        • SHA256 acd6be3a117b04ac04f2c521c8bc49ada88477a678fdf01e76a4392c5782f597
        • MD5 SHA1 SHA512 SSDEEP

        Dfdjhndl.exe

        • Path \Windows\SysWOW64\Dfdjhndl.exe
        • Size 800KB
        • SHA256 a3dce41303efefd1f02254b855d89dd932accd2251730ad2dc56f88bc37d43f8
        • MD5 SHA1 SHA512 SSDEEP

        Edkcojga.exe

        • Path \Windows\SysWOW64\Edkcojga.exe
        • Size 800KB
        • SHA256 474452dc0a899332114c0bb457895064099bdb0140a9e28347fa3d6dbafb66f4
        • MD5 SHA1 SHA512 SSDEEP

        Fkckeh32.exe

        • Path \Windows\SysWOW64\Fkckeh32.exe
        • Size 800KB
        • SHA256 572f4e3ef1e1ee44fe216663c70a5ca28bea104339e12de2b5e936d9f1e7b912
        • MD5 SHA1 SHA512 SSDEEP

        memory/1692-109-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/1692-98-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2208-108-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2208-97-0x0000000000260000-0x0000000000296000-memory.dmp

        memory/2372-0-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2372-107-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2372-12-0x0000000000270000-0x00000000002A6000-memory.dmp

        memory/2444-104-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2444-50-0x0000000000250000-0x0000000000286000-memory.dmp

        memory/2444-42-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2640-56-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2640-68-0x0000000000440000-0x0000000000476000-memory.dmp

        memory/2640-103-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2780-83-0x0000000000250000-0x0000000000286000-memory.dmp

        memory/2780-82-0x0000000000250000-0x0000000000286000-memory.dmp

        memory/2780-70-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2780-105-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2836-13-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/2836-21-0x0000000000440000-0x0000000000476000-memory.dmp

        memory/2836-106-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/3012-40-0x0000000000250000-0x0000000000286000-memory.dmp

        memory/3012-32-0x0000000000400000-0x0000000000436000-memory.dmp

        memory/3012-41-0x0000000000250000-0x0000000000286000-memory.dmp