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Analysis

  • max time kernel
    16s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    10/10/2024, 16:58

General

  • Target

    8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe

  • Size

    661KB

  • MD5

    a1ee201a9e32983c7216a6345b5384b0

  • SHA1

    d93849e60d73645a0b2817bd91d35d3519d7be2a

  • SHA256

    8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0

  • SHA512

    9dd8fdb68dde8529005ff12cb525f4d9753b15517d2efa1952e3cb42394bc1cbd9386d8ed38610368f6ffa58b5666af4e5d82948dc6f970564b5544d939d7a48

  • SSDEEP

    12288:SIt104K8pV6yYP4rbpV6yYPg058KpV6yYPNUir2MhNl6zX3w9As/xO23WM6tJmDs:SIRW4XWleKWNUir2MhNl6zX3w9As/xOn

Malware Config

Extracted

Family

berbew

C2

http://viruslist.com/wcmd.txt

http://viruslist.com/ppslog.php

http://viruslist.com/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 2 IoCs
  • Berbew

    Berbew is a backdoor written in C++.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 6 IoCs
  • Drops file in System32 directory 3 IoCs
  • Program crash 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

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

  • Modifies registry class 6 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.exe
    "C:\Users\Admin\AppData\Local\Temp\8931f156e6e992c22f97bbaa6e6f11f793270197624659ad6eb948f7f5967ed0N.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:1720
    • C:\Windows\SysWOW64\Bmenijcd.exe
      C:\Windows\system32\Bmenijcd.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2544
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 2544 -s 140
        3⤵
        • Loads dropped DLL
        • Program crash
        PID:2756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\SysWOW64\Bmenijcd.exe

    Filesize

    661KB

    MD5

    ecb3cfcd87b298a93fea7ac323b233de

    SHA1

    e74080af5d79f914fa0ba92b5714f7e7e2a4c5e1

    SHA256

    2985a861eab5264761bf8915cc96432aaeafcb408aeec51e43d11c07c6b1aadd

    SHA512

    1d3e1f265648014a56f673534322c88089eba095f18a8ff2d4be1cadc3cb2abe8d84e0317da6ebf8b78f372dbb19bd0e71283b2b375a6033797ccec506aeb9be

  • memory/1720-0-0x0000000000400000-0x0000000000435000-memory.dmp

    Filesize

    212KB

  • memory/1720-12-0x00000000002D0000-0x0000000000305000-memory.dmp

    Filesize

    212KB

  • memory/1720-13-0x00000000002D0000-0x0000000000305000-memory.dmp

    Filesize

    212KB

  • memory/1720-19-0x0000000000400000-0x0000000000435000-memory.dmp

    Filesize

    212KB

  • memory/2544-14-0x0000000000400000-0x0000000000435000-memory.dmp

    Filesize

    212KB