General

  • Target

    67735e43b595bc948f427fbc1d4d9400N.exe

  • Size

    229KB

  • Sample

    240817-qvyrdaxhnb

  • MD5

    67735e43b595bc948f427fbc1d4d9400

  • SHA1

    df92217c3101826bf0ae4c8ba53e40026e64dcc3

  • SHA256

    bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6

  • SHA512

    492b3d5372137ca3c3ad287fb84ab40ac6609eff5cf329a039f29b25c39d8c348bf547f01d6e90616e9c11593bf8f294cc73858917ca0ef2a7d03c91d6b89d14

  • SSDEEP

    6144:lloZMLrIkd8g+EtXHkv/iD4vc/yrRiK13wBzOurcVfb8e1mki:noZ0L+EP8vc/yrRiK13wBzOurCG

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1271198583076687882/-wpBphJT1bmZ3IzghCvTMvjQiZKds8S1POF_Sy_vnbIZOhTtql-E3y-UYbQtGHJMAQOe

Targets

    • Target

      67735e43b595bc948f427fbc1d4d9400N.exe

    • Size

      229KB

    • MD5

      67735e43b595bc948f427fbc1d4d9400

    • SHA1

      df92217c3101826bf0ae4c8ba53e40026e64dcc3

    • SHA256

      bb6f9600b07d01beeab0a868840ceea944a90d87fb5016ba71794ef68d0a19d6

    • SHA512

      492b3d5372137ca3c3ad287fb84ab40ac6609eff5cf329a039f29b25c39d8c348bf547f01d6e90616e9c11593bf8f294cc73858917ca0ef2a7d03c91d6b89d14

    • SSDEEP

      6144:lloZMLrIkd8g+EtXHkv/iD4vc/yrRiK13wBzOurcVfb8e1mki:noZ0L+EP8vc/yrRiK13wBzOurCG

    • 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

      Using powershell.exe command.

    • 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

    • 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