Analysis

  • max time kernel
    132s
  • max time network
    300s
  • 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 23:20

General

  • Target

    a7e44a227fc68ffa7277a9ee0f1921fcad9cba47838d6fecb9c20a026eb75a19.exe

  • Size

    2.0MB

  • MD5

    690c0efa314a7d62bba056967aa34753

  • SHA1

    05b48c7aa8c00c8bb2cfc4d65303b2dea4efe1d9

  • SHA256

    a7e44a227fc68ffa7277a9ee0f1921fcad9cba47838d6fecb9c20a026eb75a19

  • SHA512

    45fc74831f36640cf9668af654032a17a9f1b7e7a82a581e3e211cf34e05109d3da2e4a1224cc350ca309d087cf43e2a8a35524fa8ceae278b4db8b3f2606f60

  • SSDEEP

    49152:OePpQE5JtTF+TxMoxc1TU+j+dAzGwlrh:OePpQE5tIuoITsdZ

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 8 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\a7e44a227fc68ffa7277a9ee0f1921fcad9cba47838d6fecb9c20a026eb75a19.exe
    "C:\Users\Admin\AppData\Local\Temp\a7e44a227fc68ffa7277a9ee0f1921fcad9cba47838d6fecb9c20a026eb75a19.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3120
    • C:\Users\Admin\AppData\Local\Temp\kat6DCD.tmp
      C:\Users\Admin\AppData\Local\Temp\kat6DCD.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4232

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat6DCD.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/3120-0-0x0000000002330000-0x0000000002331000-memory.dmp

    Filesize

    4KB

  • memory/3120-2-0x0000000003EC0000-0x0000000004009000-memory.dmp

    Filesize

    1.3MB

  • memory/3120-10-0x0000000000400000-0x0000000000612000-memory.dmp

    Filesize

    2.1MB

  • memory/4232-4-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4232-8-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4232-9-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4232-19-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4232-20-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4232-22-0x0000000025F70000-0x00000000261CF000-memory.dmp

    Filesize

    2.4MB

  • memory/4232-37-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4232-38-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB