Analysis

  • max time kernel
    133s
  • max time network
    102s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07-06-2024 07:59

General

  • Target

    ac8b8e76ec29e5a82b3d6e84bfbb98243f4f84d3b6a1f2de439ed660b2de91f5.exe

  • Size

    2.5MB

  • MD5

    bf01a7d936fdfa4e714404012dfa83ff

  • SHA1

    af619447dd163e66af630aff77b1cd9e4de4ffcd

  • SHA256

    ac8b8e76ec29e5a82b3d6e84bfbb98243f4f84d3b6a1f2de439ed660b2de91f5

  • SHA512

    2f31abc9080ada33645bfa97446963be1ee20922623e50f5d97013fa46f8e10f658788924276a6091019bba11d442f3b4d58b80a02530b2384439f470018dcb0

  • SSDEEP

    49152:Zcm4081qpZBUbHEmJssEAQACR07Q3byRD8aXY658:ZcmmqvBUbHtOfAw07QLyLn

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.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ac8b8e76ec29e5a82b3d6e84bfbb98243f4f84d3b6a1f2de439ed660b2de91f5.exe
    "C:\Users\Admin\AppData\Local\Temp\ac8b8e76ec29e5a82b3d6e84bfbb98243f4f84d3b6a1f2de439ed660b2de91f5.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:312
    • C:\Users\Admin\AppData\Local\Temp\kat569C.tmp
      C:\Users\Admin\AppData\Local\Temp\kat569C.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      PID:1368

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat569C.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/312-0-0x0000000000850000-0x0000000000851000-memory.dmp

    Filesize

    4KB

  • memory/312-1-0x0000000002AE0000-0x0000000002C43000-memory.dmp

    Filesize

    1.4MB

  • memory/312-10-0x0000000000400000-0x000000000067A000-memory.dmp

    Filesize

    2.5MB

  • memory/1368-4-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1368-8-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1368-9-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1368-13-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1368-14-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1368-16-0x000000001DBB0000-0x000000001DE0F000-memory.dmp

    Filesize

    2.4MB

  • memory/1368-31-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/1368-32-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB