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Analysis

  • max time kernel
    148s
  • max time network
    154s
  • 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, 20:07

General

  • Target

    188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe

  • Size

    2.0MB

  • MD5

    e003c7253e44890a674e49005772e747

  • SHA1

    0680969531cac5e6bde0602b2bd5cc44239ed143

  • SHA256

    188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af

  • SHA512

    d1e817db802faa8ea12d22fd15d8f86c21ecbb64d15f85d089f077bb4db5445600598f1092bbc0235775cfbd52757e29ec55bc8f678dcb7ac4f492ab5ef928c2

  • SSDEEP

    49152:7QzHt472D/JtTF+TxMoxc1TU+j+dAzGwlrh:7QzHtBtIuoITsdZ

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\188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe
    "C:\Users\Admin\AppData\Local\Temp\188586fc32c6ce1fa2875913d6f4b38a33e1af87fa55c2fee05b8ca5698ba9af.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2100
    • C:\Users\Admin\AppData\Local\Temp\kat34EB.tmp
      C:\Users\Admin\AppData\Local\Temp\kat34EB.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:872

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat34EB.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/872-4-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/872-10-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/872-8-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/872-19-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/872-20-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/872-23-0x000000001B780000-0x000000001B9DF000-memory.dmp

    Filesize

    2.4MB

  • memory/872-37-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/872-38-0x0000000000400000-0x0000000000646000-memory.dmp

    Filesize

    2.3MB

  • memory/2100-0-0x00000000008D0000-0x00000000008D1000-memory.dmp

    Filesize

    4KB

  • memory/2100-9-0x0000000000400000-0x0000000000601000-memory.dmp

    Filesize

    2.0MB

  • memory/2100-2-0x00000000040C0000-0x0000000004209000-memory.dmp

    Filesize

    1.3MB