General

  • Target

    b925abb193e7003f4a692064148ffe7840096022a44f4d5ae4c0abb59a287934

  • Size

    556KB

  • Sample

    240418-229b8she25

  • MD5

    e1d8325b086f91769120381b78626e2e

  • SHA1

    0eb6827878445d3e3e584b7f08067a7a4dc9e618

  • SHA256

    b925abb193e7003f4a692064148ffe7840096022a44f4d5ae4c0abb59a287934

  • SHA512

    c8c0b424c2ed7ee598997bdc0b0d2099b650a280903716891b0eaa340acf556c0642d921fcb7f654387a4a1f1ec4a32feaf8d872b51ca482a977f11e2974072c

  • SSDEEP

    12288:vWcj324ri1mvJnrOj1fiTvwG/APkmUETuegWaR0j:vWcj/rxvJnCj1aTviPkmZLJaR0j

Malware Config

Extracted

Family

stealc

C2

http://185.172.128.209

Attributes
  • url_path

    /3cd2b41cbde8fc9c.php

Targets

    • Target

      b925abb193e7003f4a692064148ffe7840096022a44f4d5ae4c0abb59a287934

    • Size

      556KB

    • MD5

      e1d8325b086f91769120381b78626e2e

    • SHA1

      0eb6827878445d3e3e584b7f08067a7a4dc9e618

    • SHA256

      b925abb193e7003f4a692064148ffe7840096022a44f4d5ae4c0abb59a287934

    • SHA512

      c8c0b424c2ed7ee598997bdc0b0d2099b650a280903716891b0eaa340acf556c0642d921fcb7f654387a4a1f1ec4a32feaf8d872b51ca482a977f11e2974072c

    • SSDEEP

      12288:vWcj324ri1mvJnrOj1fiTvwG/APkmUETuegWaR0j:vWcj/rxvJnCj1aTviPkmZLJaR0j

    • Glupteba

      Glupteba is a modular loader written in Golang with various components.

    • Glupteba payload

    • Modifies firewall policy service

    • Stealc

      Stealc is an infostealer written in C++.

    • UAC bypass

    • Windows security bypass

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Windows Firewall

    • 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.

    • Drops startup file

    • 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.

    • Registers COM server for autorun

    • Windows security modification

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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.

    • Checks whether UAC is enabled

    • 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.

    • Manipulates WinMonFS driver.

      Roottkits write to WinMonFS to hide directories/files from being detected.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks