General

  • Target

    https://sites.google.com/view/7sumpvenmice

  • Sample

    240323-yshw5sec2s

Malware Config

Extracted

Family

socks5systemz

C2

http://cexfobp.net/search/?q=67e28dd86a5cf47e155fff1a7c27d78406abdd88be4b12ebb517aa5c96bd86ed82df14d714bca5817673aa4de8889b5e4fa9281ae978ff71ea771795af8e05c643db22f31dfe339426fa11af66c152adb719a9577e55b8603e983a608ffe13c2eb969d3e

http://cexfobp.net/search/?q=67e28dd86a5cf47e155fff1a7c27d78406abdd88be4b12eab517aa5c96bd86ec928648885a8bbc896c58e713bc90c91836b5281fc235a925ed3e5cd6bd974a95129070b610e96cc92be510b866db52b2e34aec4c2b14a82966836f23d7f210c7ee949839c96c9113

Targets

    • Target

      https://sites.google.com/view/7sumpvenmice

    • Socks5Systemz

      Socks5Systemz is a botnet written in C++.

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Drops Chrome extension

    • Drops desktop.ini file(s)

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v15

Tasks