Analysis

  • max time kernel
    144s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-10-2024 20:29

General

  • Target

    Vyper.exe

  • Size

    3.1MB

  • MD5

    bc8ff64cac1ae0bc4f1ae65075f6c26a

  • SHA1

    11ce47e3f7a25add1ed9fd54ce25878106b82db9

  • SHA256

    55c022e23bde36f465a1ac4e0c0558f4f6118a2df180c08ecd1afc1529d4c15f

  • SHA512

    270b3b94fbfc734740907c303a2d4a4f0cf30d23d9e7a76c9535c80a92d427e20061c48e8eabfe523405058c75e79b9d10561e855fa06f0c02fef938641f17bd

  • SSDEEP

    49152:eveI22SsaNYfdPBldt698dBcjHkfNlmGmzgsoGd2THHB72eh2NT:evT22SsaNYfdPBldt6+dBcjH8lmh

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

411db-59874.portmap.host:1333

Mutex

8d945983-5644-413f-bb5d-4f7a064e793c

Attributes
  • encryption_key

    6382B85CDCFFEEDACE064DDD30D7729DCE176C73

  • install_name

    Discord Updater.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Discord Updater

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 6 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Vyper.exe
    "C:\Users\Admin\AppData\Local\Temp\Vyper.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3976
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Discord Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Discord Updater.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4752
    • C:\Windows\system32\SubDir\Discord Updater.exe
      "C:\Windows\system32\SubDir\Discord Updater.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:4024
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Discord Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Discord Updater.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:884

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windows\System32\SubDir\Discord Updater.exe

    Filesize

    3.1MB

    MD5

    bc8ff64cac1ae0bc4f1ae65075f6c26a

    SHA1

    11ce47e3f7a25add1ed9fd54ce25878106b82db9

    SHA256

    55c022e23bde36f465a1ac4e0c0558f4f6118a2df180c08ecd1afc1529d4c15f

    SHA512

    270b3b94fbfc734740907c303a2d4a4f0cf30d23d9e7a76c9535c80a92d427e20061c48e8eabfe523405058c75e79b9d10561e855fa06f0c02fef938641f17bd

  • memory/3976-0-0x00007FFBD25A3000-0x00007FFBD25A5000-memory.dmp

    Filesize

    8KB

  • memory/3976-1-0x0000000000010000-0x0000000000334000-memory.dmp

    Filesize

    3.1MB

  • memory/3976-2-0x00007FFBD25A0000-0x00007FFBD3061000-memory.dmp

    Filesize

    10.8MB

  • memory/3976-9-0x00007FFBD25A0000-0x00007FFBD3061000-memory.dmp

    Filesize

    10.8MB

  • memory/4024-10-0x00007FFBD25A0000-0x00007FFBD3061000-memory.dmp

    Filesize

    10.8MB

  • memory/4024-11-0x00007FFBD25A0000-0x00007FFBD3061000-memory.dmp

    Filesize

    10.8MB

  • memory/4024-12-0x000000001C810000-0x000000001C860000-memory.dmp

    Filesize

    320KB

  • memory/4024-13-0x000000001C920000-0x000000001C9D2000-memory.dmp

    Filesize

    712KB

  • memory/4024-14-0x00007FFBD25A0000-0x00007FFBD3061000-memory.dmp

    Filesize

    10.8MB