Resubmissions

09-08-2024 17:20

240809-vwc9aataqn 10

09-08-2024 17:16

240809-vtg5fsxblb 10

08-08-2024 19:08

240808-xtpkmsxgmn 10

General

  • Target

    Nowatermarks.exe

  • Size

    227KB

  • Sample

    240809-vwc9aataqn

  • MD5

    926ac9e42778634f5c2580a913d83f62

  • SHA1

    e36c92f542a4c010c9cbbdb91df84ec2e16ac62f

  • SHA256

    4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8

  • SHA512

    e415af55a761d060dfd56f77491d853edb806c5e2337460fb7df8ac76f986e7a89904caa913b56fcbf19e0f3e084a71ef1a13336cf7aa73cdd52c342ff8375c6

  • SSDEEP

    6144:+loZMCrIkd8g+EtXHkv/iD475jhDJ6idOIJbGmTLFb8e1mYi:ooZZL+EP875jhDJ6idOIJbGmTJu

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1271181788311457842/_KRSDrxMDpDT4oPD3ryToXuvZ_BZWmh3fVQDMk6lnIe8xX48U6nAWKJ6cFF3-5ojFCxp

Targets

    • Target

      Nowatermarks.exe

    • Size

      227KB

    • MD5

      926ac9e42778634f5c2580a913d83f62

    • SHA1

      e36c92f542a4c010c9cbbdb91df84ec2e16ac62f

    • SHA256

      4916686177420dca945e81aebaf2fc098c21ddb74fbbf9d0f6f2adaf37f218e8

    • SHA512

      e415af55a761d060dfd56f77491d853edb806c5e2337460fb7df8ac76f986e7a89904caa913b56fcbf19e0f3e084a71ef1a13336cf7aa73cdd52c342ff8375c6

    • SSDEEP

      6144:+loZMCrIkd8g+EtXHkv/iD475jhDJ6idOIJbGmTLFb8e1mYi:ooZZL+EP875jhDJ6idOIJbGmTJu

    • 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.

    • 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