General

  • Target

    https://cdn.discordapp.com/attachments/1245482251467362385/1245491763477610506/BetterSolara.exe?ex=6658f218&is=6657a098&hm=6d4a1d7d00451c014a500cb11aa96a187ef87e27e44a2d7e34eb3e57704912ab&

  • Sample

    240529-1h9m8abe86

Malware Config

Extracted

Family

limerat

Attributes
  • aes_key

    0790308

  • antivm

    true

  • c2_url

    https://pastebin.com/raw/J0uqtmU4

  • delay

    3

  • download_payload

    false

  • install

    true

  • install_name

    Wservices.exe

  • main_folder

    AppData

  • pin_spread

    false

  • sub_folder

    \

  • usb_spread

    false

Extracted

Family

limerat

Attributes
  • antivm

    false

  • c2_url

    https://pastebin.com/raw/J0uqtmU4

  • download_payload

    false

  • install

    false

  • pin_spread

    false

  • usb_spread

    false

Targets

    • Target

      https://cdn.discordapp.com/attachments/1245482251467362385/1245491763477610506/BetterSolara.exe?ex=6658f218&is=6657a098&hm=6d4a1d7d00451c014a500cb11aa96a187ef87e27e44a2d7e34eb3e57704912ab&

    • LimeRAT

      Simple yet powerful RAT for Windows machines written in .NET.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Command and Scripting Interpreter: PowerShell

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

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • 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 local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • 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.

    • Maps connected drives based on registry

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

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks