Overview

overview

10

Static

static

10

Umbral.exe

windows7-x64

10

Umbral.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    Umbral.exe

  • Size

    227KB

  • Sample

    240605-cahyjaag2y

  • MD5

    53681862212e052e3c6b3e9ca9594428

  • SHA1

    f89c700368b19d182062f673f9b51199e08c47cc

  • SHA256

    2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2

  • SHA512

    2f9649751aeeabd4e59b7e172937518bb6867ce99eee00687243d6218edbdbc5d573a5cea36416131a3787360d215d557f91c75f480d30ce3d6bbd1152e81fa8

  • SSDEEP

    6144:+loZM9rIkd8g+EtXHkv/iD4M6Q2nLxCqV0QhTuOLQjb8e1mui:ooZOL+EP8M6Q2nLxCqV0QhTuOLKY

Score
10/10
umbralexecutionspywarestealer

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1247729405409759390/zWUzhv3beId_l06S4nnTrfCRsAkIoHRjlpnuQcnbUkUm0eJjGGkP-VfghAOgfXCbrdiS

Targets

    • Target

      Umbral.exe

    • Size

      227KB

    • MD5

      53681862212e052e3c6b3e9ca9594428

    • SHA1

      f89c700368b19d182062f673f9b51199e08c47cc

    • SHA256

      2576a8b91992cead33bc30b306852a6fbaa559fff89a534537495abe76aca3a2

    • SHA512

      2f9649751aeeabd4e59b7e172937518bb6867ce99eee00687243d6218edbdbc5d573a5cea36416131a3787360d215d557f91c75f480d30ce3d6bbd1152e81fa8

    • SSDEEP

      6144:+loZM9rIkd8g+EtXHkv/iD4M6Q2nLxCqV0QhTuOLQjb8e1mui:ooZOL+EP8M6Q2nLxCqV0QhTuOLKY

    Score
    10/10
    umbralexecutionspywarestealer

    • Detect Umbral payload

    • Umbral

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

      stealerumbral

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • 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.

      spywarestealer

    • 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.

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Persistence

Privilege Escalation

Defense Evasion

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

System Information Discovery

1
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Resource Development

Reconnaissance

Tasks