Analysis

  • max time kernel
    128s
  • max time network
    298s
  • 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 02:08

General

  • Target

    e3e4a1ada6d6cac625f89a702cfcbb5c5c0f6a6cfed0248535fc9c716c22e8d0.exe

  • Size

    1.8MB

  • MD5

    cc2b03be1e948f898b459b8e6b18a91d

  • SHA1

    4e44cd1392d1fcdde5e9d78c2f864b2fa783d87f

  • SHA256

    e3e4a1ada6d6cac625f89a702cfcbb5c5c0f6a6cfed0248535fc9c716c22e8d0

  • SHA512

    36581e80d09f0eb5c35187dc71b1423313be3787e5a0b9458078b60cae1fb09d5c2c166102c68d43d58c42482890dc05b6f5c73210c6eb6599a69f13f7c8c871

  • SSDEEP

    24576:l6z6AnPq5iak02HkOYaOV+rEfv0xwT3zxNOt4XigDSCuptNIeUaKUqm1zE:wer5l4kOYa8aesY3Ot4N7G/IeUAtK

Malware Config

Extracted

Family

stealc

rc4.plain

Extracted

Family

vidar

C2

https://t.me/r8z0l

https://steamcommunity.com/profiles/76561199698764354

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 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 4 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e3e4a1ada6d6cac625f89a702cfcbb5c5c0f6a6cfed0248535fc9c716c22e8d0.exe
    "C:\Users\Admin\AppData\Local\Temp\e3e4a1ada6d6cac625f89a702cfcbb5c5c0f6a6cfed0248535fc9c716c22e8d0.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2332
    • C:\Users\Admin\AppData\Local\Temp\katA7B.tmp
      C:\Users\Admin\AppData\Local\Temp\katA7B.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:4776

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\katA7B.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/2332-10-0x0000000000400000-0x00000000005C8000-memory.dmp

    Filesize

    1.8MB

  • memory/2332-1-0x0000000000400000-0x00000000005C8000-memory.dmp

    Filesize

    1.8MB

  • memory/2332-2-0x0000000003FB0000-0x00000000040FB000-memory.dmp

    Filesize

    1.3MB

  • memory/2332-0-0x0000000000640000-0x0000000000641000-memory.dmp

    Filesize

    4KB

  • memory/4776-11-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4776-9-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4776-5-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4776-26-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4776-27-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4776-30-0x0000000025F20000-0x000000002617F000-memory.dmp

    Filesize

    2.4MB

  • memory/4776-44-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB

  • memory/4776-45-0x0000000000400000-0x0000000000648000-memory.dmp

    Filesize

    2.3MB