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Analysis

  • max time kernel
    146s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    31/05/2024, 12:23

General

  • Target

    cb48d8e10e4a76b967c90f4c1ea6b1036288d0a3baf20335328cd39148808448.exe

  • Size

    2.4MB

  • MD5

    e0eba3b0707bc7dd205613bf6a64a9c5

  • SHA1

    a36de8569edf869edfae0b566a4c4a51cca4bcb6

  • SHA256

    cb48d8e10e4a76b967c90f4c1ea6b1036288d0a3baf20335328cd39148808448

  • SHA512

    f4264c0f7a99f7d4a1b0e4147c02f293c6d72d50a5cc469a9a2fc5e0aab625f9830af5ea48e62ab52224e95ce8db59bf90c4fb0c1dde64d6be684280f8ac7ac9

  • SSDEEP

    49152:wQc81KnB/a/hNT/d5Ya8aesY3Ot4N7G/:wDta/hNT/d5n0etD/

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\cb48d8e10e4a76b967c90f4c1ea6b1036288d0a3baf20335328cd39148808448.exe
    "C:\Users\Admin\AppData\Local\Temp\cb48d8e10e4a76b967c90f4c1ea6b1036288d0a3baf20335328cd39148808448.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3580
    • C:\Users\Admin\AppData\Local\Temp\kat3F99.tmp
      C:\Users\Admin\AppData\Local\Temp\kat3F99.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4112

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat3F99.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/3580-0-0x0000000000910000-0x0000000000911000-memory.dmp

    Filesize

    4KB

  • memory/3580-1-0x0000000002B10000-0x0000000002C5C000-memory.dmp

    Filesize

    1.3MB

  • memory/3580-9-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/4112-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4112-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4112-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4112-15-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4112-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4112-19-0x0000000019380000-0x00000000195DF000-memory.dmp

    Filesize

    2.4MB

  • memory/4112-33-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4112-34-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB