Analysis

  • max time kernel
    133s
  • max time network
    266s
  • 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 01:39

General

  • Target

    c9db6db9d040545a9d26a7314922fed8983e01f74d45d9b62fc4829b438eb466.exe

  • Size

    2.4MB

  • MD5

    b616354e22863c72bcc10033a925309d

  • SHA1

    2512c55627f52e7a2f74d085a00767f88a78c73a

  • SHA256

    c9db6db9d040545a9d26a7314922fed8983e01f74d45d9b62fc4829b438eb466

  • SHA512

    101f5ff5d8802abb310fe3452f8ad998a94e5eb740f3a8b1d200e3260749f96d540c3cd4dea0b20f644bacb83b555759f375d852d244f6d9f98236f05ea08c0f

  • SSDEEP

    49152:wQc81KnB/a/hNT/dZYa8aesY3Ot4N7G/:wDta/hNT/dZn0etD/

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 9 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\c9db6db9d040545a9d26a7314922fed8983e01f74d45d9b62fc4829b438eb466.exe
    "C:\Users\Admin\AppData\Local\Temp\c9db6db9d040545a9d26a7314922fed8983e01f74d45d9b62fc4829b438eb466.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2384
    • C:\Users\Admin\AppData\Local\Temp\kat7A60.tmp
      C:\Users\Admin\AppData\Local\Temp\kat7A60.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4672

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat7A60.tmp

    Filesize

    512KB

    MD5

    b72c302f94af349153c8a3bf55c228ae

    SHA1

    ee2cf2bd11f2e965e90fddf5f94faa74d209468b

    SHA256

    40cf30efe0ffc8875997d5819e2c501046f0a14ba68201fea9250a4d2b514581

    SHA512

    ef7a1aa5fb9c04f1e1b403aa657ec84946eb3fa5c136f5c8670e41d375395b794e1a1b4beeaf7c65ae61aa8fcad386bd71aed3e1c3ff6533cf49fb929ae4a607

  • C:\Users\Admin\AppData\Local\Temp\kat7A60.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/2384-2-0x0000000003ED0000-0x000000000401C000-memory.dmp

    Filesize

    1.3MB

  • memory/2384-9-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/2384-0-0x00000000007B0000-0x00000000007B1000-memory.dmp

    Filesize

    4KB

  • memory/4672-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4672-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4672-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4672-25-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4672-26-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4672-27-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4672-29-0x0000000025F50000-0x00000000261AF000-memory.dmp

    Filesize

    2.4MB

  • memory/4672-44-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4672-45-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB