Analysis

  • max time kernel
    90s
  • max time network
    127s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29-06-2024 03:19

General

  • Target

    aa2661bda5901e33e47a8f13acf4c150c9ce93d14ddc5ba5a7df2aec375cfd21.exe

  • Size

    2.2MB

  • MD5

    81dbd3af34ebc2b7351c2a0b751fec14

  • SHA1

    c50872165567036b8fa6a2413061db88a82a154b

  • SHA256

    aa2661bda5901e33e47a8f13acf4c150c9ce93d14ddc5ba5a7df2aec375cfd21

  • SHA512

    c15a332542c217d42ee8d6fc4309bf06e46f75f671c111d5fea01b31b55e103f575d16904c1344b43d4287791cad3961c4f947aec5aa20487e42bab53482dbfa

  • SSDEEP

    49152:qpjNvr9ySAOmw4tHHO+SASagXkJr4MDkUwm:qpjNp7p4tHH8n5A

Malware Config

Extracted

Family

vidar

C2

https://t.me/g067n

https://steamcommunity.com/profiles/76561199707802586

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:129.0) Gecko/20100101 Firefox/129.0

Signatures

  • Detect Vidar Stealer 14 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 data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
  • 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
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\aa2661bda5901e33e47a8f13acf4c150c9ce93d14ddc5ba5a7df2aec375cfd21.exe
    "C:\Users\Admin\AppData\Local\Temp\aa2661bda5901e33e47a8f13acf4c150c9ce93d14ddc5ba5a7df2aec375cfd21.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3596
    • C:\Users\Admin\AppData\Local\Temp\kat5208.tmp
      C:\Users\Admin\AppData\Local\Temp\kat5208.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3448
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\system32\cmd.exe" /c timeout /t 10 & del /f /q "C:\Users\Admin\AppData\Local\Temp\kat5208.tmp" & rd /s /q "C:\ProgramData\KFCFBFHIEBKJ" & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2928
        • C:\Windows\SysWOW64\timeout.exe
          timeout /t 10
          4⤵
          • Delays execution with timeout.exe
          PID:5044

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat5208.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/3448-25-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-71-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-27-0x000000002F700000-0x000000002F95F000-memory.dmp

    Filesize

    2.4MB

  • memory/3448-8-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-42-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-74-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-24-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-43-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-73-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-10-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-72-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-59-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-60-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3448-4-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/3596-0-0x0000000002370000-0x0000000002371000-memory.dmp

    Filesize

    4KB

  • memory/3596-1-0x0000000004010000-0x0000000004120000-memory.dmp

    Filesize

    1.1MB

  • memory/3596-9-0x0000000000400000-0x0000000000635000-memory.dmp

    Filesize

    2.2MB