General

  • Target

    solara.exe

  • Size

    2.8MB

  • Sample

    250412-ste9raxvbx

  • MD5

    84c1cc9f977f79b4820bcb8f236fce20

  • SHA1

    88d879456a7f075760525824dcc8b2de7bbe6f13

  • SHA256

    808fc30e9ed9cf43a86b6608fc9c5f5c28443d51207f30d06cf88c0081b54e18

  • SHA512

    66b98b55c9d36b27a0f96eba539b820450ba552deacc323dabfbe4db936eb5ad4c57cb8683e10570212ce1b6ea9f04adeaecd9f41618e4625f78bc5b87f3f65c

  • SSDEEP

    49152:N5wRNpPAI7CYItONjnwsp61qLJa2uQzdqYoqDLdS96A4zDziq2EJLFp2C/XHYQ/:NaRvROYEQEqFajKoqDLgMAI2KLmC/XHv

Malware Config

Targets

    • Target

      solara.exe

    • Size

      2.8MB

    • MD5

      84c1cc9f977f79b4820bcb8f236fce20

    • SHA1

      88d879456a7f075760525824dcc8b2de7bbe6f13

    • SHA256

      808fc30e9ed9cf43a86b6608fc9c5f5c28443d51207f30d06cf88c0081b54e18

    • SHA512

      66b98b55c9d36b27a0f96eba539b820450ba552deacc323dabfbe4db936eb5ad4c57cb8683e10570212ce1b6ea9f04adeaecd9f41618e4625f78bc5b87f3f65c

    • SSDEEP

      49152:N5wRNpPAI7CYItONjnwsp61qLJa2uQzdqYoqDLdS96A4zDziq2EJLFp2C/XHYQ/:NaRvROYEQEqFajKoqDLgMAI2KLmC/XHv

    • Detect Umbral payload

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Umbral family

    • Command and Scripting Interpreter: PowerShell

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

    • Disables Task Manager via registry modification

    • Modifies Windows Firewall

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Reads user/profile data of web browsers

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

    • Adds Run key to start application

    • 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.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

    • Drops file in System32 directory

MITRE ATT&CK Enterprise v16

Tasks