Analysis

  • max time kernel
    79s
  • max time network
    189s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    03-06-2024 05:32

General

  • Target

    5cf1875d49763a1e2c06cde297dd35a1a1b6be86ce105de2bd174091f787cc00.exe

  • Size

    2.4MB

  • MD5

    1d3292059e4394a0330e4883521dd5d8

  • SHA1

    7bd98b232f227fe7242621995030bb8a66efad7f

  • SHA256

    5cf1875d49763a1e2c06cde297dd35a1a1b6be86ce105de2bd174091f787cc00

  • SHA512

    8be2dccbfac5322201abedb7965e02bed798f443ef552a1975f5010d430afc1c7dae87db4ad009ff383274c0e37f891d63cdc68de384a9428c12a0c2bafc08a4

  • SSDEEP

    49152:wQc81KnB/a/hNT/dxYa8aesY3Ot4N7G/:wDta/hNT/dxn0etD/

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 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 6 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\5cf1875d49763a1e2c06cde297dd35a1a1b6be86ce105de2bd174091f787cc00.exe
    "C:\Users\Admin\AppData\Local\Temp\5cf1875d49763a1e2c06cde297dd35a1a1b6be86ce105de2bd174091f787cc00.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1260
    • C:\Users\Admin\AppData\Local\Temp\kat6590.tmp
      C:\Users\Admin\AppData\Local\Temp\kat6590.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:192

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\kat6590.tmp

    Filesize

    861KB

    MD5

    66064dbdb70a5eb15ebf3bf65aba254b

    SHA1

    0284fd320f99f62aca800fb1251eff4c31ec4ed7

    SHA256

    6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

    SHA512

    b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

  • memory/192-4-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/192-8-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/192-10-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/192-16-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/192-17-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/192-19-0x000000001B690000-0x000000001B8EF000-memory.dmp

    Filesize

    2.4MB

  • memory/192-34-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/192-35-0x0000000000400000-0x0000000000649000-memory.dmp

    Filesize

    2.3MB

  • memory/1260-0-0x00000000007E0000-0x00000000007E1000-memory.dmp

    Filesize

    4KB

  • memory/1260-2-0x0000000003F10000-0x000000000405C000-memory.dmp

    Filesize

    1.3MB

  • memory/1260-9-0x0000000000400000-0x0000000000663000-memory.dmp

    Filesize

    2.4MB