Analysis

  • max time kernel
    195s
  • max time network
    259s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    30/05/2024, 23:04

General

  • Target

    6db4da3b6c5aa8cb457d4a3e44eb6e10d0563f06edf83feb4253dde78d9be5f2.exe

  • Size

    2.0MB

  • MD5

    dc6c57b2b64e6954ecb098fab260a861

  • SHA1

    512df27b255ece715a0d5f7751e511f93f8c4140

  • SHA256

    6db4da3b6c5aa8cb457d4a3e44eb6e10d0563f06edf83feb4253dde78d9be5f2

  • SHA512

    6673b5deecc215fab14ea02af94d3ad5ea83f3c8cc2d6c32660ced98405293d51784568a851fd17df1eb3990ce356edd89b99b411736f64a457cc9389c3fdb09

  • SSDEEP

    49152:OePpQEdJtTF+TxMoxc1TU+j+dAzGwlrh:OePpQEdtIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://steamcommunity.com/profiles/76561199689717899

https://t.me/copterwin

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\6db4da3b6c5aa8cb457d4a3e44eb6e10d0563f06edf83feb4253dde78d9be5f2.exe
    "C:\Users\Admin\AppData\Local\Temp\6db4da3b6c5aa8cb457d4a3e44eb6e10d0563f06edf83feb4253dde78d9be5f2.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:344
    • C:\Users\Admin\AppData\Local\Temp\kat61C7.tmp
      C:\Users\Admin\AppData\Local\Temp\kat61C7.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:3676

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\kat61C7.tmp

          Filesize

          861KB

          MD5

          66064dbdb70a5eb15ebf3bf65aba254b

          SHA1

          0284fd320f99f62aca800fb1251eff4c31ec4ed7

          SHA256

          6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

          SHA512

          b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

        • memory/344-0-0x0000000000770000-0x0000000000771000-memory.dmp

          Filesize

          4KB

        • memory/344-2-0x0000000003ED0000-0x0000000004019000-memory.dmp

          Filesize

          1.3MB

        • memory/344-9-0x0000000000400000-0x0000000000612000-memory.dmp

          Filesize

          2.1MB

        • memory/3676-8-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/3676-10-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/3676-4-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/3676-16-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/3676-17-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/3676-19-0x000000001B6C0000-0x000000001B91F000-memory.dmp

          Filesize

          2.4MB

        • memory/3676-34-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB

        • memory/3676-35-0x0000000000400000-0x0000000000646000-memory.dmp

          Filesize

          2.3MB