General

  • Target

    lsass.exe

  • Size

    231KB

  • Sample

    240823-1rbgsayfmf

  • MD5

    3593f099b9c3e67320e88a6934eaaa25

  • SHA1

    280da4c122c680ecb0f246c67e3913eb1cc923a1

  • SHA256

    78f05b962a93bd4cd6086b6d785c987b18891f3a9e39866a5115c80bbcd51f3c

  • SHA512

    b3c391e9e652fa8918fe9b7e0f9ee53166840a688b1dffb3dc8d045c879b5f825c0a571c306d98cf2b5c44e88a99e8d8fcfede310f063df506acce09e31ee75c

  • SSDEEP

    6144:5loZM+rIkd8g+EtXHkv/iD4S08Cls8e1mrci:LoZtL+EP8DQ01

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1276610201444683786/qZfVBIKkzPkpYEV2YIodb6dDqpbtEG5jZd9HJHrhvxiyRwxxMjFIgAw4JDLkv1NCWVH4

Targets

    • Target

      lsass.exe

    • Size

      231KB

    • MD5

      3593f099b9c3e67320e88a6934eaaa25

    • SHA1

      280da4c122c680ecb0f246c67e3913eb1cc923a1

    • SHA256

      78f05b962a93bd4cd6086b6d785c987b18891f3a9e39866a5115c80bbcd51f3c

    • SHA512

      b3c391e9e652fa8918fe9b7e0f9ee53166840a688b1dffb3dc8d045c879b5f825c0a571c306d98cf2b5c44e88a99e8d8fcfede310f063df506acce09e31ee75c

    • SSDEEP

      6144:5loZM+rIkd8g+EtXHkv/iD4S08Cls8e1mrci:LoZtL+EP8DQ01

    • Detect Umbral payload

    • Umbral

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • Command and Scripting Interpreter: PowerShell

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

    • Drops file in Drivers directory

    • Deletes itself

    • Reads user/profile data of web browsers

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

    • 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.

MITRE ATT&CK Enterprise v15

Tasks