Analysis

  • max time kernel
    96s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-11-2024 15:53

General

  • Target

    KRcLFIz5PCQunB7.exe

  • Size

    3.5MB

  • MD5

    a08b35662044abf9528c24c3f663eaed

  • SHA1

    aee7831f263e6b83198a790d8a8948a841a600e2

  • SHA256

    3f233256d32f8c33884510be0e50b614a35642f6ed7cb76b1f480373b548b295

  • SHA512

    0866868cbf52999b233546348cde08c3cfcf2deef86830a319d8430e6d815a02b8438f46c944fbd9f2010d7e9fcb6f4f77db490280894b899de0afc71278b5dd

  • SSDEEP

    49152:Uf+eHq329+bhPCNJZxh2H4s0E04nfxhFZ9kIODfdWutT825SkDh83TQ237w4fGi:U+MrJZqYsTfnFZ9ktfgtSSTQ23s4p

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

FLO

C2

qtd.ydns.eu:5829

Mutex

ac3de377-7a66-4586-b523-567adbbba988

Attributes
  • encryption_key

    C5B555A83D127A9553D4FB1FCECB35CE8E91A447

  • install_name

    outlooks.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Outlooks

  • subdirectory

    WindowsUpdates

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 6 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 25 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe
    "C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4212
    • C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe
      "C:\Users\Admin\AppData\Local\Temp\KRcLFIz5PCQunB7.exe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:640
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:452
      • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
        "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2792
        • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe
          "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe"
          4⤵
          • Executes dropped EXE
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:1500
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "Outlooks" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe" /rl HIGHEST /f
            5⤵
            • System Location Discovery: System Language Discovery
            • Scheduled Task/Job: Scheduled Task
            PID:4768

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\KRcLFIz5PCQunB7.exe.log

    Filesize

    1KB

    MD5

    8ec831f3e3a3f77e4a7b9cd32b48384c

    SHA1

    d83f09fd87c5bd86e045873c231c14836e76a05c

    SHA256

    7667e538030e3f8ce2886e47a01af24cb0ea70528b1e821c5d8832c5076cb982

    SHA512

    26bffa2406b66368bd412bf25869a792631455645992cdcade2dbc13a2e56fb546414a6a9223b94c96c38d89187add6678d4779a88b38b0c9e36be8527b213c3

  • C:\Users\Admin\AppData\Roaming\WindowsUpdates\outlooks.exe

    Filesize

    3.5MB

    MD5

    a08b35662044abf9528c24c3f663eaed

    SHA1

    aee7831f263e6b83198a790d8a8948a841a600e2

    SHA256

    3f233256d32f8c33884510be0e50b614a35642f6ed7cb76b1f480373b548b295

    SHA512

    0866868cbf52999b233546348cde08c3cfcf2deef86830a319d8430e6d815a02b8438f46c944fbd9f2010d7e9fcb6f4f77db490280894b899de0afc71278b5dd

  • memory/640-16-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/640-14-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/640-22-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/640-11-0x0000000000400000-0x0000000000724000-memory.dmp

    Filesize

    3.1MB

  • memory/1500-33-0x0000000006A60000-0x0000000006B12000-memory.dmp

    Filesize

    712KB

  • memory/1500-31-0x0000000006CE0000-0x00000000072F8000-memory.dmp

    Filesize

    6.1MB

  • memory/1500-32-0x00000000067F0000-0x0000000006840000-memory.dmp

    Filesize

    320KB

  • memory/1500-36-0x0000000007F20000-0x0000000007F32000-memory.dmp

    Filesize

    72KB

  • memory/1500-37-0x0000000007F80000-0x0000000007FBC000-memory.dmp

    Filesize

    240KB

  • memory/1500-38-0x0000000008030000-0x0000000008096000-memory.dmp

    Filesize

    408KB

  • memory/2792-30-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/2792-26-0x00000000053B0000-0x00000000053C2000-memory.dmp

    Filesize

    72KB

  • memory/2792-25-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/2792-24-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/2792-23-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/4212-7-0x0000000074AFE000-0x0000000074AFF000-memory.dmp

    Filesize

    4KB

  • memory/4212-15-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/4212-10-0x0000000007D60000-0x00000000080C8000-memory.dmp

    Filesize

    3.4MB

  • memory/4212-9-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/4212-8-0x0000000005820000-0x0000000005832000-memory.dmp

    Filesize

    72KB

  • memory/4212-0-0x0000000074AFE000-0x0000000074AFF000-memory.dmp

    Filesize

    4KB

  • memory/4212-6-0x0000000074AF0000-0x00000000752A0000-memory.dmp

    Filesize

    7.7MB

  • memory/4212-5-0x0000000005980000-0x0000000005A1C000-memory.dmp

    Filesize

    624KB

  • memory/4212-4-0x00000000057A0000-0x00000000057AA000-memory.dmp

    Filesize

    40KB

  • memory/4212-3-0x0000000005700000-0x0000000005792000-memory.dmp

    Filesize

    584KB

  • memory/4212-2-0x0000000005C10000-0x00000000061B4000-memory.dmp

    Filesize

    5.6MB

  • memory/4212-1-0x0000000000AB0000-0x0000000000E40000-memory.dmp

    Filesize

    3.6MB