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Overview

overview

10

Static

static

3

efa9c92c5e...c1.exe

windows7-x64

10

efa9c92c5e...c1.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    139s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/05/2024, 10:00

Sharing

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General

  • Target

    efa9c92c5e7d0608cee15af285a48d5a6a8b7bff95c26287f611f3a5bba9e0c1.exe

  • Size

    2.0MB

  • MD5

    19744978fe9f7728f71e0fc7b445a0f6

  • SHA1

    53eb2f859a57a4d82c26a1572c78088428fd60ba

  • SHA256

    efa9c92c5e7d0608cee15af285a48d5a6a8b7bff95c26287f611f3a5bba9e0c1

  • SHA512

    315f983d4529a5e8e042a5f9ea62be6605e411a0e1e006c639c11998a9aea74df8523a9ad4754ba67628b6e8c5c03f9ccc97730c8cfa5613961e702cbe8c2153

  • SSDEEP

    49152:IFno/jfsJtTF+TxMoxc1TU+j+dAzGkiT:IFno/jEtIuoITsdZT

Score
10/10
stealcvidardiscoveryspywarestealer

Malware Config

Extracted

Family

stealc

rc4.plain

Signatures

  • Detect Vidar Stealer 8 IoCs
    stealer
  • Stealc

    Stealc is an infostealer written in C++.

    stealerstealc
  • Vidar

    Vidar is an infostealer based on Arkei stealer.

    stealervidar
  • Detect binaries embedding considerable number of MFA browser extension IDs. 4 IoCs
  • Detect binaries embedding considerable number of cryptocurrency wallet browser extension IDs. 4 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 7 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 4 IoCs
  • Detects binaries and memory artifacts referencing sandbox DLLs typically observed in sandbox evasion 7 IoCs
  • Detects executables containing potential Windows Defender anti-emulation checks 7 IoCs
  • 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.

    spywarestealer
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • 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\efa9c92c5e7d0608cee15af285a48d5a6a8b7bff95c26287f611f3a5bba9e0c1.exe
    "C:\Users\Admin\AppData\Local\Temp\efa9c92c5e7d0608cee15af285a48d5a6a8b7bff95c26287f611f3a5bba9e0c1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:5036
    • C:\Users\Admin\AppData\Local\Temp\katE91.tmp
      C:\Users\Admin\AppData\Local\Temp\katE91.tmp
      2⤵
      • Executes dropped EXE
      • Checks processor information in registry
      • Suspicious behavior: EnumeratesProcesses
      PID:3828
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4104,i,11746347647270949551,7786733067759450703,262144 --variations-seed-version --mojo-platform-channel-handle=4024 /prefetch:8
    1⤵
      PID:516

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\katE91.tmp
      Filesize

      861KB

      MD5

      66064dbdb70a5eb15ebf3bf65aba254b

      SHA1

      0284fd320f99f62aca800fb1251eff4c31ec4ed7

      SHA256

      6a94dbda2dd1edcff2331061d65e1baf09d4861cc7ba590c5ec754f3ac96a795

      SHA512

      b05c6c09ae7372c381fba591c3cb13a69a2451b9d38da1a95aac89413d7438083475d06796acb5440cd6ec65b030c9fa6cbdaa0d2fe91a926bae6499c360f17f

      Download Submit

    • memory/3828-4-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

      Download

    • memory/3828-8-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

      Download

    • memory/3828-9-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

      Download

    • memory/3828-14-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

      Download

    • memory/3828-15-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

      Download

    • memory/3828-17-0x000000001DBE0000-0x000000001DE3F000-memory.dmp

      Filesize

      2.4MB

      Download

    • memory/3828-32-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

      Download

    • memory/3828-33-0x0000000000400000-0x0000000000646000-memory.dmp

      Filesize

      2.3MB

      Download

    • memory/5036-0-0x00000000007A0000-0x00000000007A1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/5036-2-0x0000000004060000-0x00000000041A9000-memory.dmp

      Filesize

      1.3MB

      Download

    • memory/5036-10-0x0000000000400000-0x0000000000602000-memory.dmp

      Filesize

      2.0MB

      Download