Overview

overview

10

Static

static

10

5eeaa9bcbf...1N.exe

windows7-x64

10

5eeaa9bcbf...1N.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    5eeaa9bcbf85412722f2bc78d1db1634d25f1f6c75c8d0134d775e489b0b6641N.exe

  • Size

    3.2MB

  • Sample

    250102-fnwckavkby

  • MD5

    189a348006367f0532cafbced6f4f7a0

  • SHA1

    334fe5ea524c5a8e51ba8cb0ade6d894c9c8f94c

  • SHA256

    5eeaa9bcbf85412722f2bc78d1db1634d25f1f6c75c8d0134d775e489b0b6641

  • SHA512

    679706cf963b7ed251e61dc8d26b2fea1016ec72cf2596a4852c85d1ad5d4b8e43bd2d761f192e72cc5e5e39ecb6ce666366bdf2a0927f93186317ddc3bdca80

  • SSDEEP

    49152:tivht62XlaSFNWPjljiFa2RoUYI4CZ1J5LoGdQPTHHB72eh2NTi:MvL62XlaSFNWPjljiFXRoUYI4CT4

Score
10/10
quasaroffice04discoveryevasionpersistencespywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

4.tcp.us-cal-1.ngrok.io:18092

Mutex

11bbf22e-826e-486b-b024-adbd86228a9e

Attributes
  • encryption_key

    7A589EDBC6A581E125BF830EF0D05FC74BB75E30

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    ctfmon

  • subdirectory

    SubDir

Targets

    • Target

      5eeaa9bcbf85412722f2bc78d1db1634d25f1f6c75c8d0134d775e489b0b6641N.exe

    • Size

      3.2MB

    • MD5

      189a348006367f0532cafbced6f4f7a0

    • SHA1

      334fe5ea524c5a8e51ba8cb0ade6d894c9c8f94c

    • SHA256

      5eeaa9bcbf85412722f2bc78d1db1634d25f1f6c75c8d0134d775e489b0b6641

    • SHA512

      679706cf963b7ed251e61dc8d26b2fea1016ec72cf2596a4852c85d1ad5d4b8e43bd2d761f192e72cc5e5e39ecb6ce666366bdf2a0927f93186317ddc3bdca80

    • SSDEEP

      49152:tivht62XlaSFNWPjljiFa2RoUYI4CZ1J5LoGdQPTHHB72eh2NTi:MvL62XlaSFNWPjljiFXRoUYI4CT4

    Score
    10/10
    quasaroffice04discoveryevasionpersistencespywaretrojan

    • Modifies visiblity of hidden/system files in Explorer

      evasion

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar family

      quasar

    • Quasar payload

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks