Analysis

  • max time kernel
    90s
  • max time network
    93s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240426-en
  • resource tags

    arch:x64arch:x86image:win11-20240426-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-05-2024 19:23

General

  • Target

    ba6586bd778e49eacc224799b3bccde533727d00c7492b754ee7c03eb2219d5a.exe

  • Size

    2.1MB

  • MD5

    1356dc8c03d7d02e826b93e90b7c9322

  • SHA1

    88ce71cec9895dcd9d1c6586d7388b60328b94fb

  • SHA256

    ba6586bd778e49eacc224799b3bccde533727d00c7492b754ee7c03eb2219d5a

  • SHA512

    df4af023172160e586bf0850b3ad562bb72c87d063075f7bb7f121e2b2f05b6c224c554c3145b61dcb39fa6df699bb25e7e0c649657928db1c134705f9a614a3

  • SSDEEP

    49152:N6uDuaS9refeoJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9LotIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

  • Detect Vidar Stealer 9 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\ba6586bd778e49eacc224799b3bccde533727d00c7492b754ee7c03eb2219d5a.exe
    "C:\Users\Admin\AppData\Local\Temp\ba6586bd778e49eacc224799b3bccde533727d00c7492b754ee7c03eb2219d5a.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3876
    • C:\Users\Admin\AppData\Local\Temp\kat378B.tmp
      C:\Users\Admin\AppData\Local\Temp\kat378B.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:2948

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat378B.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/2948-8-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/2948-4-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/2948-9-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/2948-16-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/2948-17-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/2948-18-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/2948-21-0x000000001B870000-0x000000001BACF000-memory.dmp

    Filesize

    2.4MB

  • memory/2948-35-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/2948-36-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/3876-1-0x0000000004040000-0x0000000004189000-memory.dmp

    Filesize

    1.3MB

  • memory/3876-10-0x0000000000400000-0x000000000061C000-memory.dmp

    Filesize

    2.1MB

  • memory/3876-0-0x0000000002490000-0x0000000002491000-memory.dmp

    Filesize

    4KB