Analysis

  • max time kernel
    130s
  • max time network
    125s
  • 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 01:32

General

  • Target

    614fda416a81ce67cc4a56f458fa1899687d175748914ff10a23384db55089f1.exe

  • Size

    2.1MB

  • MD5

    cf40fb082422b1b9905fd644261b6a9f

  • SHA1

    b9d87ed2a3010a9862572eade1ff89915ed92b14

  • SHA256

    614fda416a81ce67cc4a56f458fa1899687d175748914ff10a23384db55089f1

  • SHA512

    0c949ba99c621392d24f585692fea2d910d2353b0358c905c62187b99a9a537957e276605234ce37868e9d4907a313cdb3c40edd47e535e0b4a93420ff011083

  • SSDEEP

    49152:N6uDuaS9refWAJtTF+TxMoxc1TU+j+dAzGwlrh:N6uKb97AtIuoITsdZ

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\614fda416a81ce67cc4a56f458fa1899687d175748914ff10a23384db55089f1.exe
    "C:\Users\Admin\AppData\Local\Temp\614fda416a81ce67cc4a56f458fa1899687d175748914ff10a23384db55089f1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:324
    • C:\Users\Admin\AppData\Local\Temp\kat5AF1.tmp
      C:\Users\Admin\AppData\Local\Temp\kat5AF1.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:640

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat5AF1.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/324-0-0x00000000008D0000-0x00000000008D1000-memory.dmp

    Filesize

    4KB

  • memory/324-1-0x0000000004130000-0x0000000004279000-memory.dmp

    Filesize

    1.3MB

  • memory/324-9-0x0000000000400000-0x000000000061C000-memory.dmp

    Filesize

    2.1MB

  • memory/640-8-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/640-10-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/640-4-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/640-12-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/640-13-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/640-15-0x0000000023B50000-0x0000000023DAF000-memory.dmp

    Filesize

    2.4MB

  • memory/640-30-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/640-31-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB