General

  • Target
    HolyCheck1.exe
  • Size 823KB
  • Sample260717-pl8pjsa12l
  • SHA256 8d84295d27f4e621d4e58febab9183fa109f3a8258e67ba765c544166580ed5c
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.nirsoft.net/utils/recentfilesview.zip

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.nirsoft.net/utils/browserdownloadsview.zip

Extracted

Language
  • ps1

Deobfuscated
Source
URLs
  • exe.dropper

    https://www.nirsoft.net/utils/executedprogramslist.zip

Extracted

Family
  • sheetrat

Version
  • 1.8

C2
  • 91.92.42.94:1105

Extracted

Family
  • xorium_stealer

C2
  • https://api.telegram.org/bot8866979664:AAE2gIW8qR_tvvskZG1c54sAE_YVJJ9Dd4Y/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
      HolyCheck1.exe
    • Size 823KB
    • SHA256 8d84295d27f4e621d4e58febab9183fa109f3a8258e67ba765c544166580ed5c
    • MD5 SHA1 SHA512 SSDEEP TLSH
    • Detects Sheetrat obfuscated V1.8 and higher

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

    • 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#.

    • Modifies WinLogon for persistence

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • Badlisted process makes network request

      Network request originating from process or tool commonly abused by malware.

    • Command and Scripting Interpreter: PowerShell

      Start PowerShell.

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

    • 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.

    • Network Share Discovery

      Attempt to gather information on host network.

    • Obfuscated Files or Information: Command Obfuscation

      Adversaries may obfuscate content during command execution to impede detection.

    • UPX packed file

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

MITRE ATT&CK Enterprise v16

Tasks