Analysis

  • max time kernel
    134s
  • max time network
    129s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/05/2024, 11:43

General

  • Target

    e8d3f8d2eed68c24edb3d8e83fa79dc73e9d4ef758e996c381da6f3258daf4e6.exe

  • Size

    2.0MB

  • MD5

    2742f8c319df53a1e335b40dc3e8772c

  • SHA1

    134bf9e0a438cbd65c57668a954b12ee2b821374

  • SHA256

    e8d3f8d2eed68c24edb3d8e83fa79dc73e9d4ef758e996c381da6f3258daf4e6

  • SHA512

    38b1b55b1bea2cad69bb88d1dad3735fbb81059aba1b0f10d762fda93bd3a0762b505749897eba017d58a316fe1aadfb60e114f3612ab150c6000c25b43567d5

  • SSDEEP

    49152:7QzHt472DaJtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtUtIuoITsdZ

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\e8d3f8d2eed68c24edb3d8e83fa79dc73e9d4ef758e996c381da6f3258daf4e6.exe
    "C:\Users\Admin\AppData\Local\Temp\e8d3f8d2eed68c24edb3d8e83fa79dc73e9d4ef758e996c381da6f3258daf4e6.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3316
    • C:\Users\Admin\AppData\Local\Temp\kat39DC.tmp
      C:\Users\Admin\AppData\Local\Temp\kat39DC.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4836

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat39DC.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/3316-0-0x00000000024B0000-0x00000000024B1000-memory.dmp

    Filesize

    4KB

  • memory/3316-1-0x0000000004180000-0x00000000042C9000-memory.dmp

    Filesize

    1.3MB

  • memory/3316-10-0x0000000000400000-0x0000000000601000-memory.dmp

    Filesize

    2.0MB

  • memory/4836-4-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4836-8-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4836-9-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4836-19-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4836-20-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4836-23-0x0000000028400000-0x000000002865F000-memory.dmp

    Filesize

    2.4MB

  • memory/4836-37-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/4836-38-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB