Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    16/08/2024, 23:44

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    4c11f56b9a516468535cd9dfb4625554

  • SHA1

    c85f8a363d0bc4071c82648736d04502a0f77b6e

  • SHA256

    54f96306329acf69543eafbc220bb617151cf4f6572d05a1d99aa2633134b29f

  • SHA512

    b525267b0de611e119c141962f9b8a2e054b3f5afa15140d098ca278e468658aac649c19b802076461fc283e7b7a826b146b3a2319e2af635df6eb820fd81e1d

  • SSDEEP

    49152:tmCk6UTYfYnGJCvFt8lJ6QgeC2eH4THHB72eh2NT:tmsUTyYnGJCvFt8lJ6Qg5

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SKIDS

C2

147.185.221.22:6712

Mutex

4464eb7a-fcd4-46b0-a1b1-9f00f87d96f8

Attributes
  • encryption_key

    9E968F05BD874BA1BE086FD1774A027473823F49

  • install_name

    Windows Host Process.exe

  • log_directory

    WindowsLogs

  • reconnect_delay

    3000

  • startup_key

    Windows Host Process

  • subdirectory

    Windows

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 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\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2356
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2252
    • C:\Windows\system32\Windows\Windows Host Process.exe
      "C:\Windows\system32\Windows\Windows Host Process.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 SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2976
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "Windows Host Process" /sc ONLOGON /tr "C:\Windows\system32\Windows\Windows Host Process.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2760

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Windows\System32\Windows\Windows Host Process.exe

    Filesize

    3.1MB

    MD5

    4c11f56b9a516468535cd9dfb4625554

    SHA1

    c85f8a363d0bc4071c82648736d04502a0f77b6e

    SHA256

    54f96306329acf69543eafbc220bb617151cf4f6572d05a1d99aa2633134b29f

    SHA512

    b525267b0de611e119c141962f9b8a2e054b3f5afa15140d098ca278e468658aac649c19b802076461fc283e7b7a826b146b3a2319e2af635df6eb820fd81e1d

  • memory/2356-0-0x000007FEF56D3000-0x000007FEF56D4000-memory.dmp

    Filesize

    4KB

  • memory/2356-1-0x00000000010C0000-0x00000000013EC000-memory.dmp

    Filesize

    3.2MB

  • memory/2356-2-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

    Filesize

    9.9MB

  • memory/2356-8-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

    Filesize

    9.9MB

  • memory/2976-10-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

    Filesize

    9.9MB

  • memory/2976-9-0x0000000000DF0000-0x000000000111C000-memory.dmp

    Filesize

    3.2MB

  • memory/2976-11-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

    Filesize

    9.9MB

  • memory/2976-12-0x000007FEF56D0000-0x000007FEF60BC000-memory.dmp

    Filesize

    9.9MB