Analysis

  • max time kernel
    80s
  • max time network
    81s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    24-12-2024 01:35

General

  • Target

    Authenticator.exe

  • Size

    375KB

  • MD5

    85b43fd8aa9d8b09b8613f2fa47c6bb0

  • SHA1

    3729c0739c24b7ed9fda30684173a869c7398e80

  • SHA256

    6eea566794504979f9fa4d75285751f49afde178ad8a0cdfb81fceec9ebb2eb9

  • SHA512

    2898dc0c44a6543136281cf0bbdc03c3cc958098366773fc31ab047c2819e9df3d2b5596ded0d9a2811d915d4ced0404494dfa3381572c56dda9bf2772706ef2

  • SSDEEP

    6144:YbqQ4i1FFiEKZVSQZzs5jQKbgQ203StbjjSQkzaozVVqH:CpliPScgCy73StbjjSQkVzV0H

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Authenticator

C2

iamaskibiditoilet-58299.portmap.host:58299

Mutex

QSR_MUTEX_bNzknSVeSVx21JnqhQ

Attributes
  • encryption_key

    wAIAzlOLR0d5V3YI1aCM

  • install_name

    Runtime Broker.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Runtime Broker

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Authenticator.exe
    "C:\Users\Admin\AppData\Local\Temp\Authenticator.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1600
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Authenticator.exe" /rl HIGHEST /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2968
    • C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2712
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Runtime Broker" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2984

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • \Users\Admin\AppData\Roaming\SubDir\Runtime Broker.exe

    Filesize

    375KB

    MD5

    85b43fd8aa9d8b09b8613f2fa47c6bb0

    SHA1

    3729c0739c24b7ed9fda30684173a869c7398e80

    SHA256

    6eea566794504979f9fa4d75285751f49afde178ad8a0cdfb81fceec9ebb2eb9

    SHA512

    2898dc0c44a6543136281cf0bbdc03c3cc958098366773fc31ab047c2819e9df3d2b5596ded0d9a2811d915d4ced0404494dfa3381572c56dda9bf2772706ef2

  • memory/1600-0-0x0000000074DEE000-0x0000000074DEF000-memory.dmp

    Filesize

    4KB

  • memory/1600-1-0x0000000000340000-0x00000000003A4000-memory.dmp

    Filesize

    400KB

  • memory/1600-2-0x0000000074DE0000-0x00000000754CE000-memory.dmp

    Filesize

    6.9MB

  • memory/1600-13-0x0000000074DE0000-0x00000000754CE000-memory.dmp

    Filesize

    6.9MB

  • memory/2712-10-0x0000000000DF0000-0x0000000000E54000-memory.dmp

    Filesize

    400KB

  • memory/2712-12-0x0000000074DE0000-0x00000000754CE000-memory.dmp

    Filesize

    6.9MB

  • memory/2712-11-0x0000000074DE0000-0x00000000754CE000-memory.dmp

    Filesize

    6.9MB

  • memory/2712-15-0x0000000074DE0000-0x00000000754CE000-memory.dmp

    Filesize

    6.9MB

  • memory/2712-16-0x0000000074DE0000-0x00000000754CE000-memory.dmp

    Filesize

    6.9MB