General

  • Target
    Nursultan.exe
  • Size 2.1MB
  • Sample261102-t4eawaxx4m
  • SHA256 b790035d175e34b5198f379ae6c876cf9d083cb29024616ed194e99b964ccfd5
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • sheetrat

Version
  • 1.8

C2
  • 0.cantdown.su:1786

Extracted

Family
  • xworm

Version
  • XWorm V7.1

C2
  • 0.cantdown.su:1786

Attributes
  • Install_directory

    %AppData%

  • install_file

    XWormClient.exe

Extracted

Family
  • sheetrat

Version
  • 2.6.4

C2
  • 0.cantdown.su:1786

Extracted

Family
  • xorium_stealer

C2
  • https://api.telegram.org/bot9118041330:AAElT-04bLVLm-NIlansJOqxJpKziXEjPJI/sendDocument

Attributes
  • user_agent

    Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/91.0.4472.124 Safari/537.36

Targets

    • Target
      Nursultan.exe
    • Size 2.1MB
    • SHA256 b790035d175e34b5198f379ae6c876cf9d083cb29024616ed194e99b964ccfd5
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detect Xworm Payload

    • Detects Sheetrat obfuscated V1.8 and higher

      Sheetrat aka NonEuclid RAT is a trojan written in C#.

    • Detects Sheetrat obfuscated version

    • Detects XoriumStealer payload

    • Family: Sheetrat, NonEuclid rat

      Sheetrat aka NonEuclid RAT is a trojan written in C#.

    • Family: XoriumStealer

      XoriumStealer is an information stealer written in C#.

    • Family: Xworm

      Xworm is a remote access trojan written in C#.

    • Modifies WinLogon for persistence

    • Event Triggered Execution: AppInit DLLs

      Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

    • Reads user/profile data of web browsers

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

    • Accesses Microsoft Outlook profiles

    • 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.

    • 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 v16

Tasks