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Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/06/2024, 11:36

General

  • Target

    88b0a48e7afd6a3bb4bb6eea66519d0a5c41883a40b05fe1e91f632237545aad.exe

  • Size

    1.8MB

  • MD5

    852ff151baf7e66e6cd635a3dc31b9dc

  • SHA1

    ddfbf5be8f795acf604f67ae8671fa5b30c7278c

  • SHA256

    88b0a48e7afd6a3bb4bb6eea66519d0a5c41883a40b05fe1e91f632237545aad

  • SHA512

    9ca68fd835508cb994e78bb80176e9d67a552148872318be590f5976114c912a7a232173964346a8c98cb1062df95da3926468898f974f667c62b2dfb60a257b

  • SSDEEP

    24576:l6z6AnPq5iak02HkBYaOV+rEfv0xwT3zxNOt4XigDSCuptNIeUaKUqm1zE:wer5l4kBYa8aesY3Ot4N7G/IeUAtK

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

  • Detect Vidar Stealer 8 IoCs
  • Stealc

    Stealc is an infostealer written in C++.

  • Vidar

    Vidar is an infostealer based on Arkei stealer.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 1 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\88b0a48e7afd6a3bb4bb6eea66519d0a5c41883a40b05fe1e91f632237545aad.exe
    "C:\Users\Admin\AppData\Local\Temp\88b0a48e7afd6a3bb4bb6eea66519d0a5c41883a40b05fe1e91f632237545aad.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2136
    • C:\Users\Admin\AppData\Local\Temp\kat44F8.tmp
      C:\Users\Admin\AppData\Local\Temp\kat44F8.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4820

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat44F8.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/2136-0-0x0000000002440000-0x0000000002441000-memory.dmp

    Filesize

    4KB

  • memory/2136-2-0x0000000002A80000-0x0000000002BCB000-memory.dmp

    Filesize

    1.3MB

  • memory/2136-9-0x0000000000400000-0x00000000005C8000-memory.dmp

    Filesize

    1.8MB

  • memory/4820-8-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4820-10-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4820-4-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4820-13-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4820-14-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4820-17-0x000000001B730000-0x000000001B98F000-memory.dmp

    Filesize

    2.4MB

  • memory/4820-31-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4820-32-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB