Overview

overview

10

Static

static

3

4efce9b609...cc.exe

windows7-x64

10

4efce9b609...cc.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    4efce9b6099fa6bfc272b5e192fe16cc.bin

  • Size

    8.3MB

  • Sample

    240530-cmpa3sag7x

  • MD5

    4efce9b6099fa6bfc272b5e192fe16cc

  • SHA1

    d5495d7d0593a0258bb50325eb0381cec5decd19

  • SHA256

    185d297d3a204b586f262ce576bc40127b6ea49561b07c7e40c0a2e779df03e1

  • SHA512

    0b81846c316c3790b1d3fd88953d7c9350443d8dd34cbf4311677e5706b59f4e8b0819186f7cb81b980bab88b9aa6802170536d50a989f081b0aacb68f58ca5f

  • SSDEEP

    196608:UB4vMWmmF95vrRoypY2xNS+U1kYLLBGJt4qi5Wh4d3J4jtQG0gIe:UevBn5viETxNS+5OBU4hat0gI

Score
10/10
umbralexecutionpersistencespywarestealer

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1244715424420069449/GTIFnC19DnPwT_RfLQ395m4ILCbNzqdjl2fE6jLwJomWdfGuqMipwhUem4c7oUOG5y7l

Targets

    • Target

      4efce9b6099fa6bfc272b5e192fe16cc.bin

    • Size

      8.3MB

    • MD5

      4efce9b6099fa6bfc272b5e192fe16cc

    • SHA1

      d5495d7d0593a0258bb50325eb0381cec5decd19

    • SHA256

      185d297d3a204b586f262ce576bc40127b6ea49561b07c7e40c0a2e779df03e1

    • SHA512

      0b81846c316c3790b1d3fd88953d7c9350443d8dd34cbf4311677e5706b59f4e8b0819186f7cb81b980bab88b9aa6802170536d50a989f081b0aacb68f58ca5f

    • SSDEEP

      196608:UB4vMWmmF95vrRoypY2xNS+U1kYLLBGJt4qi5Wh4d3J4jtQG0gIe:UevBn5viETxNS+5OBU4hat0gI

    Score
    10/10
    umbralpersistencestealerexecutionspyware

    • Detect Umbral payload

    • Modifies WinLogon for persistence

      persistence

    • 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

    • Modifies AppInit DLL entries

      persistence

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Adds Run key to start application

      persistence

    • 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

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

3
T1112

Hide Artifacts

1
T1564

Hidden Files and Directories

1
T1564.001

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

2
T1012

System Information Discovery

3
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