Analysis

  • max time kernel
    192s
  • max time network
    265s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    07-06-2024 01:48

General

  • Target

    d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe

  • Size

    2.4MB

  • MD5

    562687a84496956e4fa01811c02f45b4

  • SHA1

    926276d1633db57cdec97f26c1201dfd110048b4

  • SHA256

    d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec

  • SHA512

    9f42704656bf60b3e6a45722dde3f1e56d274333487a305618038c7ea18affbed1ffdfe580cc8e42589f17d3eb8691b5c3135254824f22cdddd830ae0d2b2c75

  • SSDEEP

    49152:wQc81KnB/a/hNT/dpYa8aesY3Ot4N7G/:wDta/hNT/dpn0etD/

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/ta904ek

https://steamcommunity.com/profiles/76561199695752269

Attributes
  • user_agent

    Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:128.0) Gecko/20100101 Firefox/128.0

Signatures

  • Detect Vidar Stealer 7 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 6 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe
    "C:\Users\Admin\AppData\Local\Temp\d8227944a7143a04cbd1a443d704fa1df108cccc78370c9f00756587989323ec.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4472
    • C:\Users\Admin\AppData\Local\Temp\kat84C0.tmp
      C:\Users\Admin\AppData\Local\Temp\kat84C0.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4980

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat84C0.tmp

    Filesize

    192KB

    MD5

    e0220c91e870805066b20f9332d42a01

    SHA1

    227b994b790d3a08551937d1f1cf1c01a4d9a0e3

    SHA256

    0bc85276b24e039598ebd6b0ab1f702896e3d8b91b72f135ffc107ca1da01db7

    SHA512

    c968ba57edf70d3f581292d88c953b81070353d720eb28ba911f94b54c5f04f1cba0be7756fbcbbbe5f1f44cbefeaaab095a4cfee48be0578c6cdf1bf1764766

  • C:\Users\Admin\AppData\Local\Temp\kat84C0.tmp

    Filesize

    448KB

    MD5

    d7d3e9e68f500a5362ef855382d5934b

    SHA1

    740495877cbcda9c61c8eb1ce3cb0c0f20738a81

    SHA256

    8cdc50bc308edd6d0f70d7c8203f0ef469daaa62ae801a00c93e6b9160fef772

    SHA512

    512f5d5764050274d5beb6c966c787eb50a9850ec4c4886cda14f3a912dc627d29d2cac5db7f825500041a47ce65ecc4e8f728dc934c748f6575ae17d4c2cf89

  • memory/4472-2-0x0000000004010000-0x000000000415C000-memory.dmp

    Filesize

    1.3MB

  • memory/4472-9-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB

  • memory/4472-0-0x00000000023A0000-0x00000000023A1000-memory.dmp

    Filesize

    4KB

  • memory/4980-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4980-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4980-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4980-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4980-17-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4980-19-0x0000000019220000-0x000000001947F000-memory.dmp

    Filesize

    2.4MB

  • memory/4980-34-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/4980-35-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB