Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    08/07/2026, 18:11

General

  • Target
    yanhh3d.exe
  • Size 3.1MB
  • Sample260708-wstbrset2j
  • SHA256 e3a5b3ac1e634bccd338c55b0b7f14ac97604800ce02e6ae8618f770ef990eae
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • yanhh3d

C2
  • 172.67.161.129:4782

  • yanhh3d.ee:4782

  • 104.21.66.157:4782

  • 104.21.66.157:443

  • yanhh3d.ee:443

  • 172.67.161.129:443

Mutex
  • bab58c9b-1138-4a66-89ea-095d3b87264d

Attributes
  • encryption_key

    FAA6DCCCB5AA917EA4E50E1D9897AB35BE84AF27

  • install_name

    yanhh3d.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Family: Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\yanhh3d.exe
    "C:\Users\Admin\AppData\Local\Temp\yanhh3d.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Users\Admin\AppData\Roaming\SubDir\yanhh3d.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\yanhh3d.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:4812

Network

        MITRE ATT&CK Matrix

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        yanhh3d.exe.log

        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\yanhh3d.exe.log
        • Size 1KB
        • SHA256 ee954c5d8156fd8890e582c716e5758ed9b33721258f10e758bdc31ccbcb1924
        • MD5 SHA1 SHA512 TLSH

        yanhh3d.exe

        • Path C:\Users\Admin\AppData\Roaming\SubDir\yanhh3d.exe
        • Size 3.1MB
        • SHA256 e3a5b3ac1e634bccd338c55b0b7f14ac97604800ce02e6ae8618f770ef990eae
        • MD5 SHA1 SHA512 SSDEEP TLSH

        memory/4640-0-0x0000000000C50000-0x0000000000F74000-memory.dmp

        memory/4640-1-0x000000001BCB0000-0x000000001BCC0000-memory.dmp

        memory/4812-8-0x0000000002820000-0x0000000002830000-memory.dmp

        memory/4812-9-0x000000001BF00000-0x000000001BF50000-memory.dmp

        memory/4812-10-0x000000001C010000-0x000000001C0C2000-memory.dmp

        memory/4812-11-0x0000000002820000-0x0000000002830000-memory.dmp