Overview

overview

10

Static

static

3

tempfixed.exe

windows10-ltsc_2021-x64

10

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General

  • Target

    tempfixed.exe

  • Size

    945KB

  • Sample

    250412-vd9jrsyls2

  • MD5

    643ea9f09b2a1569d837e3ed4df1cde3

  • SHA1

    49cfb0d2624c1e21505f29ccb3dd84fe760f36bf

  • SHA256

    8a5df02a019f735361db01e5236473ef17cbbcb4843d2fd9f1d35fb6056a2333

  • SHA512

    8a46f9d86486acbed1ab277bcb730693c215e2932f84a512d327bda77cd539bcd48d119278817439c4d4762d0ca83de94c05dd242cb59d478fbc9eb4f0a0241c

  • SSDEEP

    24576:f+rGtLxxYkWKYqJYmbb0bxpi2OsDVp2f0/NLTq+avT4BcCi:WGtDYkWezvYxZpp2f0/NLTq+avT4BcCi

Score
10/10
umbralexecutionpersistenceprivilege_escalationspywarestealer

Malware Config

Targets

    • Target

      tempfixed.exe

    • Size

      945KB

    • MD5

      643ea9f09b2a1569d837e3ed4df1cde3

    • SHA1

      49cfb0d2624c1e21505f29ccb3dd84fe760f36bf

    • SHA256

      8a5df02a019f735361db01e5236473ef17cbbcb4843d2fd9f1d35fb6056a2333

    • SHA512

      8a46f9d86486acbed1ab277bcb730693c215e2932f84a512d327bda77cd539bcd48d119278817439c4d4762d0ca83de94c05dd242cb59d478fbc9eb4f0a0241c

    • SSDEEP

      24576:f+rGtLxxYkWKYqJYmbb0bxpi2OsDVp2f0/NLTq+avT4BcCi:WGtDYkWezvYxZpp2f0/NLTq+avT4BcCi

    Score
    10/10
    umbralexecutionpersistenceprivilege_escalationspywarestealer

    • Detect Umbral payload

    • Umbral

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

      stealerumbral

    • Umbral family

      umbral

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Downloads MZ/PE file

    • Executes dropped EXE

    • 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.

    • Drops file in System32 directory

    behavioral1

MITRE ATT&CK Enterprise v16

Tasks