Overview

overview

10

Static

static

10

1b586bfe34...e7.exe

windows7-x64

10

1b586bfe34...e7.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    138s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26-06-2024 01:05

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General

  • Target

    1b586bfe3423ef03ecba497e90fd31b42022dd8e1f325e212c1e23cc58ba7be7.exe

  • Size

    3.1MB

  • MD5

    aa5da5d211dd6b3c5e9404520ebeec1f

  • SHA1

    037e6d5fa8398a3f95df469d60debe6fc8c93f89

  • SHA256

    1b586bfe3423ef03ecba497e90fd31b42022dd8e1f325e212c1e23cc58ba7be7

  • SHA512

    9a02a50c2534ece296d183bd712f8be240f4e5d989842656e28392af41036d29dc30cf205fe3526b980a480c54c3d9a4de7f5ef35103dec2d29fb513d2e83b72

  • SSDEEP

    49152:PvSI22SsaNYfdPBldt698dBcjHod/oKT2fOTmZPKoGANtTHHB72eh2NT:Pv/22SsaNYfdPBldt6+dBcjHE/oKDg

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

91.92.242.80:4782

Mutex

e88cd5c3-d3f7-4cbb-94a7-7136e3bc6ab9

Attributes
  • encryption_key

    B1F363CB165B4ADD4702FD386A0A1054BFED678C

  • install_name

    WindowsUpdate.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows.Update

  • subdirectory

    Update

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar payload 1 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 1 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs
  • Detects executables containing common artifacts observed in infostealers 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\1b586bfe3423ef03ecba497e90fd31b42022dd8e1f325e212c1e23cc58ba7be7.exe
    "C:\Users\Admin\AppData\Local\Temp\1b586bfe3423ef03ecba497e90fd31b42022dd8e1f325e212c1e23cc58ba7be7.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:228
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Windows.Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Update\WindowsUpdate.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2500
  • 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 --mojo-platform-channel-handle=4124 --field-trial-handle=1928,i,13242902252791919845,10377620236057253993,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:2548

    Network

    MITRE ATT&CK Matrix ATT&CK v13

    Initial Access

    Execution

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Persistence

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Privilege Escalation

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Defense Evasion

    Credential Access

    Discovery

    Query Registry

    1
    T1012

    Lateral Movement

    Collection

    Exfiltration

    Command and Control

    Impact

    Resource Development

    Reconnaissance

    Replay Monitor

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    Downloads

    • memory/228-0-0x00007FF9EA913000-0x00007FF9EA915000-memory.dmp
      Filesize

      8KB

      Download
    • memory/228-1-0x00000000000C0000-0x00000000003E4000-memory.dmp
      Filesize

      3.1MB

      Download
    • memory/228-2-0x00007FF9EA910000-0x00007FF9EB3D1000-memory.dmp
      Filesize

      10.8MB

      Download
    • memory/228-3-0x00007FF9EA913000-0x00007FF9EA915000-memory.dmp
      Filesize

      8KB

      Download
    • memory/228-4-0x00007FF9EA910000-0x00007FF9EB3D1000-memory.dmp
      Filesize

      10.8MB

      Download