Analysis

  • max time kernel
    133s
  • max time network
    298s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    07-06-2024 02:15

General

  • Target

    f7e5af1ce8f77d8061aab1b679e210c0c03b394f5d835695a6a56f6067fa8b26.exe

  • Size

    1.8MB

  • MD5

    2e50c4582f66e1f5afd7ab7f33b476ad

  • SHA1

    9d533fcfa22237f6e92f4000c00c7f056f0099fa

  • SHA256

    f7e5af1ce8f77d8061aab1b679e210c0c03b394f5d835695a6a56f6067fa8b26

  • SHA512

    28ae738caf09fd0b32ac7b86db219e144dd02f6a1864aedb61e1d1ebbe4f36d8fb9e24c36c8cc1bf979294d2578bc5644369074e0b6507fb8c131f4ca0ec26ce

  • SSDEEP

    24576:W7YfUB7F1931tbsYaOV+rEfv0xwT3zxNOt4XigDSCuptNEynEsqqfD:W75B7FDFtbsYa8aesY3Ot4N7G/

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 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f7e5af1ce8f77d8061aab1b679e210c0c03b394f5d835695a6a56f6067fa8b26.exe
    "C:\Users\Admin\AppData\Local\Temp\f7e5af1ce8f77d8061aab1b679e210c0c03b394f5d835695a6a56f6067fa8b26.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:512
    • C:\Users\Admin\AppData\Local\Temp\kat79F3.tmp
      C:\Users\Admin\AppData\Local\Temp\kat79F3.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4512

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat79F3.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/512-0-0x00000000023B0000-0x00000000023B1000-memory.dmp

    Filesize

    4KB

  • memory/512-1-0x0000000003E10000-0x0000000003F5C000-memory.dmp

    Filesize

    1.3MB

  • memory/512-10-0x0000000000400000-0x00000000005CE000-memory.dmp

    Filesize

    1.8MB

  • memory/4512-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4512-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4512-9-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4512-25-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4512-26-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4512-28-0x0000000025F80000-0x00000000261DF000-memory.dmp

    Filesize

    2.4MB

  • memory/4512-43-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4512-44-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB