Resubmissions

10-12-2023 03:30

231210-d2s39adde2 10

10-12-2023 01:32

231210-bx3e1sbcfq 10

10-12-2023 01:04

231210-be3casbbcn 10

General

  • Target

    file

  • Size

    1.1MB

  • Sample

    231210-be3casbbcn

  • MD5

    f0b0a5f64dcfc3cbc85b115928903074

  • SHA1

    d77ad5345ea489673f4e00e892caa81f92aec7c1

  • SHA256

    0acc5eca8860dc87070e066f3258296228439b35bdb9fbc02185fc861a97475f

  • SHA512

    cbee9df095fd51e7b9a8c6ed69bff51b78c34ae6d87c85cd45bb8daa5378689914f29d73ecec0bdc0546167e2acc2e93eb630884a19397c655128b0e65fdccb9

  • SSDEEP

    24576:/JuwYk1FDiCaItlrzZNkSqVLHX4gG6WCepxaKpo:/AzqraItV3CD4gG6Xe1po

Malware Config

Extracted

Family

stealc

C2

http://77.91.76.36

Attributes
  • url_path

    /3886d2276f6914c4.php

rc4.plain

Targets

    • Target

      file

    • Size

      1.1MB

    • MD5

      f0b0a5f64dcfc3cbc85b115928903074

    • SHA1

      d77ad5345ea489673f4e00e892caa81f92aec7c1

    • SHA256

      0acc5eca8860dc87070e066f3258296228439b35bdb9fbc02185fc861a97475f

    • SHA512

      cbee9df095fd51e7b9a8c6ed69bff51b78c34ae6d87c85cd45bb8daa5378689914f29d73ecec0bdc0546167e2acc2e93eb630884a19397c655128b0e65fdccb9

    • SSDEEP

      24576:/JuwYk1FDiCaItlrzZNkSqVLHX4gG6WCepxaKpo:/AzqraItV3CD4gG6Xe1po

    • Glupteba

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

    • Glupteba payload

    • Modifies Windows Defender Real-time Protection settings

    • Rhadamanthys

      Rhadamanthys is an info stealer written in C++ first seen in August 2022.

    • Stealc

      Stealc is an infostealer written in C++.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • UAC bypass

    • Windows security bypass

    • Modifies boot configuration data using bcdedit

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Windows Firewall

    • Possible attempt to disable PatchGuard

      Rootkits can use kernel patching to embed themselves in an operating system.

    • 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 data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • 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.

    • 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 WinMon driver.

      Roottkits write to WinMon to hide PIDs from being detected.

    • 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