Analysis

  • max time kernel
    94s
  • max time network
    95s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-06-2024 10:15

General

  • Target

    0af59d03bd25aaf14e586154643236d709f6402ba8a1227e62dcb19459aa9c57.exe

  • Size

    1.8MB

  • MD5

    a34e791dfcd157d27e4c0dde760ca105

  • SHA1

    6f8bafe3dcfe3021409930c6e7c2fdae12175683

  • SHA256

    0af59d03bd25aaf14e586154643236d709f6402ba8a1227e62dcb19459aa9c57

  • SHA512

    ce79de32c3e6b2a8d6febb1b9c336783e5cc7767c870b52aed74539b35ea8ec523230652dbf20f25ad28e087461831f63531065d36c601d9e46550197c9421d4

  • SSDEEP

    24576:W7YfUB7F1931tbaYaOV+rEfv0xwT3zxNOt4XigDSCuptNEynEsqqfD:W75B7FDFtbaYa8aesY3Ot4N7G/

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

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\0af59d03bd25aaf14e586154643236d709f6402ba8a1227e62dcb19459aa9c57.exe
    "C:\Users\Admin\AppData\Local\Temp\0af59d03bd25aaf14e586154643236d709f6402ba8a1227e62dcb19459aa9c57.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1640
    • C:\Users\Admin\AppData\Local\Temp\kat4F49.tmp
      C:\Users\Admin\AppData\Local\Temp\kat4F49.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:1808

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat4F49.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/1640-0-0x0000000002360000-0x0000000002361000-memory.dmp

    Filesize

    4KB

  • memory/1640-2-0x0000000002AC0000-0x0000000002C0C000-memory.dmp

    Filesize

    1.3MB

  • memory/1640-9-0x0000000000400000-0x00000000005CE000-memory.dmp

    Filesize

    1.8MB

  • memory/1808-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1808-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1808-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1808-13-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1808-14-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1808-16-0x000000001B760000-0x000000001B9BF000-memory.dmp

    Filesize

    2.4MB

  • memory/1808-31-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1808-35-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB