Analysis

  • max time kernel
    92s
  • max time network
    93s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240508-en
  • resource tags

    arch:x64arch:x86image:win11-20240508-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    22-05-2024 02:02

General

  • Target

    70a27192aba61792e947a2d97d836c966932f94b9dd410c03603bb6f1b29dfc4.exe

  • Size

    2.1MB

  • MD5

    fdaefb75abfe2ee10097cb3754c2a93b

  • SHA1

    f531860142458b949f57069fdcc5c3936fa45e2a

  • SHA256

    70a27192aba61792e947a2d97d836c966932f94b9dd410c03603bb6f1b29dfc4

  • SHA512

    459b27842e64c1c4c63e8970cab961876e69e1d4db4c03982802a69e6e26b9801892da038d869822fa15bbf6a166999510a96b7412bd9418642ab0c9bd3853f8

  • SSDEEP

    49152:N6uDuaS9refmIJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb9jItIuoITsdZ

Malware Config

Extracted

Family

stealc

rc4.plain

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\70a27192aba61792e947a2d97d836c966932f94b9dd410c03603bb6f1b29dfc4.exe
    "C:\Users\Admin\AppData\Local\Temp\70a27192aba61792e947a2d97d836c966932f94b9dd410c03603bb6f1b29dfc4.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4980
    • C:\Users\Admin\AppData\Local\Temp\kat4258.tmp
      C:\Users\Admin\AppData\Local\Temp\kat4258.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4692

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat4258.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/4692-4-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4692-8-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4692-10-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4692-16-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4692-17-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4692-20-0x0000000019360000-0x00000000195BF000-memory.dmp

    Filesize

    2.4MB

  • memory/4692-34-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4692-35-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4980-0-0x0000000002380000-0x0000000002381000-memory.dmp

    Filesize

    4KB

  • memory/4980-2-0x0000000004030000-0x0000000004179000-memory.dmp

    Filesize

    1.3MB

  • memory/4980-9-0x0000000000400000-0x000000000061C000-memory.dmp

    Filesize

    2.1MB