Analysis

  • max time kernel
    94s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-08-2024 09:58

General

  • Target

    ia.exe

  • Size

    3.1MB

  • MD5

    5828b4f3710d309100812b3f698a34c2

  • SHA1

    64c5979a98bc2855bdc440d9fc669d5f63cfaa9f

  • SHA256

    19a7fd629bf8badfd4703785c8af9fbb3396689a47d2375274c1fae6629ee24b

  • SHA512

    2888bd591344bf43cb03edc7c70e8a6a9200c17f97df0ea3bb0883a5b0aa62b4464d736e659f7b23a4303b3376e36c302882ff85054982649be9a1ccbca50127

  • SSDEEP

    49152:Pv9t62XlaSFNWPjljiFa2RoUYIWgloUBxZ/oGdQeTHHB72eh2NT:Pv/62XlaSFNWPjljiFXRoUYI/ou

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.184:4782

Mutex

63d17811-7d89-4513-a09e-567135741dc7

Attributes
  • encryption_key

    F3BEC07E3E649D50CEE84302EC0FDD43A47F4E75

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    ia

  • subdirectory

    ia

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
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

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

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

  • Suspicious behavior: EnumeratesProcesses 33 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 58 IoCs
  • Suspicious use of SendNotifyMessage 58 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\ia.exe
    "C:\Users\Admin\AppData\Local\Temp\ia.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4160
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "ia" /sc ONLOGON /tr "C:\Windows\system32\ia\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4296
    • C:\Windows\system32\ia\Client.exe
      "C:\Windows\system32\ia\Client.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:880
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "ia" /sc ONLOGON /tr "C:\Windows\system32\ia\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4396
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:2968
    • C:\Windows\system32\taskmgr.exe
      "C:\Windows\system32\taskmgr.exe" /4
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2420

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Windows\System32\ia\Client.exe

      Filesize

      3.1MB

      MD5

      5828b4f3710d309100812b3f698a34c2

      SHA1

      64c5979a98bc2855bdc440d9fc669d5f63cfaa9f

      SHA256

      19a7fd629bf8badfd4703785c8af9fbb3396689a47d2375274c1fae6629ee24b

      SHA512

      2888bd591344bf43cb03edc7c70e8a6a9200c17f97df0ea3bb0883a5b0aa62b4464d736e659f7b23a4303b3376e36c302882ff85054982649be9a1ccbca50127

    • memory/880-11-0x00007FFE9DF50000-0x00007FFE9EA11000-memory.dmp

      Filesize

      10.8MB

    • memory/880-14-0x00007FFE9DF50000-0x00007FFE9EA11000-memory.dmp

      Filesize

      10.8MB

    • memory/880-13-0x000000001B910000-0x000000001B9C2000-memory.dmp

      Filesize

      712KB

    • memory/880-12-0x0000000002780000-0x00000000027D0000-memory.dmp

      Filesize

      320KB

    • memory/880-9-0x00007FFE9DF50000-0x00007FFE9EA11000-memory.dmp

      Filesize

      10.8MB

    • memory/2420-17-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-24-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-21-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-22-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-23-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-16-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-15-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-27-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-26-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/2420-25-0x000001B3B87B0000-0x000001B3B87B1000-memory.dmp

      Filesize

      4KB

    • memory/4160-10-0x00007FFE9DF50000-0x00007FFE9EA11000-memory.dmp

      Filesize

      10.8MB

    • memory/4160-0-0x00007FFE9DF53000-0x00007FFE9DF55000-memory.dmp

      Filesize

      8KB

    • memory/4160-1-0x0000000000C20000-0x0000000000F44000-memory.dmp

      Filesize

      3.1MB

    • memory/4160-2-0x00007FFE9DF50000-0x00007FFE9EA11000-memory.dmp

      Filesize

      10.8MB