Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/03/2024, 18:21

General

  • Target
    8339045F879C83C60A535E72190C6B53.exe
  • Size 2.9MB
  • Sample240301-wza4rsbd78
  • SHA256 ec78b7b9f3560e19d0c723d7d114747d3833cb940631f9a3dbe83634e8d68491
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • 27.02 - r

C2
  • 194.87.252.184:4782

Mutex
  • 1127ef31-5071-4c30-bbbe-8bcb36d37abd

Attributes
  • encryption_key

    DD459BB92A43EF8EEB2FE401C8453F685AECE590

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Checks processor information in registry 2 TTPs 3 IoCs

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

  • Enumerates processes with tasklist 1 TTPs 2 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 3 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
      PID:3232
      • C:\Users\Admin\AppData\Local\Temp\8339045F879C83C60A535E72190C6B53.exe
        "C:\Users\Admin\AppData\Local\Temp\8339045F879C83C60A535E72190C6B53.exe"
        2⤵
        • Checks computer location settings
        • Suspicious use of WriteProcessMemory
        PID:4452
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /k move Aboriginal Aboriginal.bat & Aboriginal.bat & exit
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3616
          • C:\Windows\SysWOW64\tasklist.exe
            tasklist
            4⤵
            • Enumerates processes with tasklist
            • Suspicious use of AdjustPrivilegeToken
            PID:4172
          • C:\Windows\SysWOW64\findstr.exe
            findstr /I "wrsa.exe opssvc.exe"
            4⤵
              PID:4596
            • C:\Windows\SysWOW64\tasklist.exe
              tasklist
              4⤵
              • Enumerates processes with tasklist
              • Suspicious use of AdjustPrivilegeToken
              PID:1516
            • C:\Windows\SysWOW64\findstr.exe
              findstr /I "avastui.exe avgui.exe nswscsvc.exe sophoshealth.exe"
              4⤵
                PID:2416
              • C:\Windows\SysWOW64\cmd.exe
                cmd /c md 13287
                4⤵
                  PID:1804
                • C:\Windows\SysWOW64\cmd.exe
                  cmd /c copy /b Britney + Styles + Pipeline + Username + Suffer + Excellence 13287\Lie.pif
                  4⤵
                    PID:4784
                  • C:\Windows\SysWOW64\cmd.exe
                    cmd /c copy /b Property 13287\F
                    4⤵
                      PID:400
                    • C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\13287\Lie.pif
                      13287\Lie.pif 13287\F
                      4⤵
                      • Suspicious use of NtCreateUserProcessOtherParentProcess
                      • Executes dropped EXE
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious behavior: GetForegroundWindowSpam
                      • Suspicious use of FindShellTrayWindow
                      • Suspicious use of SendNotifyMessage
                      • Suspicious use of WriteProcessMemory
                      PID:3172
                    • C:\Windows\SysWOW64\PING.EXE
                      ping -n 5 127.0.0.1
                      4⤵
                      • Runs ping.exe
                      PID:1060
                • C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\13287\RegAsm.exe
                  C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\13287\RegAsm.exe
                  2⤵
                  • Checks computer location settings
                  • Executes dropped EXE
                  • Modifies registry class
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of SetWindowsHookEx
                  • Suspicious use of WriteProcessMemory
                  PID:3864
                  • C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE
                    "C:\Program Files\Microsoft Office\Root\Office16\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Резюме (Татьяна Михайлова).doc" /o ""
                    3⤵
                    • Checks processor information in registry
                    • Enumerates system info in registry
                    • Suspicious behavior: AddClipboardFormatListener
                    • Suspicious use of SetWindowsHookEx
                    PID:4932

              Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    Lie.pif

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\13287\Lie.pif
                    • Size 924KB
                    • SHA256 f58d3a4b2f3f7f10815c24586fae91964eeed830369e7e0701b43895b0cefbd3
                    • MD5 SHA1 SHA512 SSDEEP

                    RegAsm.exe

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\13287\RegAsm.exe
                    • Size 63KB
                    • SHA256 c066aee7aa3aa83f763ebc5541daa266ed6c648fbffcde0d836a13b221bb2adc
                    • MD5 SHA1 SHA512 SSDEEP

                    Aboriginal

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\Aboriginal
                    • Size 10KB
                    • SHA256 c93e967a55d9818f48f146dd5fa1790d50b6b6994806b9a984b296c44caf7e63
                    • MD5 SHA1 SHA512 SSDEEP

                    Britney

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\Britney
                    • Size 146KB
                    • SHA256 67a96529b61982b1b860af5710a7d3f65f33a630f6ce613a64b6eedda79403f2
                    • MD5 SHA1 SHA512 SSDEEP

                    Excellence

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\Excellence
                    • Size 136KB
                    • SHA256 e0abbd2bbcec3db32823ba43f357df7e9be16defff29a5e1e55b8682624590b5
                    • MD5 SHA1 SHA512 SSDEEP

                    Pipeline

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\Pipeline
                    • Size 130KB
                    • SHA256 d0a3c6c90ec7fcae7f332fef3aa6f2bdcea557bab33c9f71acc3146241c621c1
                    • MD5 SHA1 SHA512 SSDEEP

                    Property

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\Property
                    • Size 4.4MB
                    • SHA256 28ec73e5d81ec24ecb5fb4a25b6010c6394ba45290cb32c1b7e28a51c6703b65
                    • MD5 SHA1 SHA512 SSDEEP

                    Styles

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\Styles
                    • Size 110KB
                    • SHA256 c19318190538dceea957e8238407302e971e21a2aea73f7d03d79e90fe8426c2
                    • MD5 SHA1 SHA512 SSDEEP

                    Suffer

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\Suffer
                    • Size 183KB
                    • SHA256 32f37d9cf14d6c4974bb84cc5d74119feaf57569da0b0034b08795d5ae1568ee
                    • MD5 SHA1 SHA512 SSDEEP

                    Username

                    • Path C:\Users\Admin\AppData\Local\Temp\7ZipSfx.000\Username
                    • Size 219KB
                    • SHA256 13cb3210d145d061929d7c80ade232ff88e8fae54357f83a63651feef4971a5c
                    • MD5 SHA1 SHA512 SSDEEP

                    Резюме (Татьяна Михайлова).doc

                    • Path C:\Users\Admin\AppData\Local\Temp\Резюме (Татьяна Михайлова).doc
                    • Size 68KB
                    • SHA256 fba2acea9f965b35c8e1168604df6cfd83dc709ac2878eaa37728e0d2c896f78
                    • MD5 SHA1 SHA512 SSDEEP

                    memory/3172-33-0x0000000006880000-0x0000000006881000-memory.dmp

                    memory/3172-30-0x0000000077051000-0x0000000077171000-memory.dmp

                    memory/3864-39-0x0000000005680000-0x0000000005C24000-memory.dmp

                    memory/3864-92-0x00000000051D0000-0x00000000051E0000-memory.dmp

                    memory/3864-40-0x00000000051E0000-0x0000000005272000-memory.dmp

                    memory/3864-41-0x00000000051D0000-0x00000000051E0000-memory.dmp

                    memory/3864-42-0x0000000005290000-0x000000000529A000-memory.dmp

                    memory/3864-35-0x0000000000800000-0x0000000000B60000-memory.dmp

                    memory/3864-51-0x0000000006BE0000-0x00000000071F8000-memory.dmp

                    memory/3864-38-0x0000000072B30000-0x00000000732E0000-memory.dmp

                    memory/3864-91-0x0000000072B30000-0x00000000732E0000-memory.dmp

                    memory/3864-64-0x00000000068C0000-0x0000000006972000-memory.dmp

                    memory/3864-72-0x0000000007830000-0x0000000007896000-memory.dmp

                    memory/3864-56-0x0000000006650000-0x00000000066A0000-memory.dmp

                    memory/3864-71-0x0000000007780000-0x00000000077BC000-memory.dmp

                    memory/3864-70-0x0000000006BC0000-0x0000000006BD2000-memory.dmp

                    memory/4932-55-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-58-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-54-0x00007FFD33D50000-0x00007FFD33D60000-memory.dmp

                    memory/4932-63-0x00007FFD33D50000-0x00007FFD33D60000-memory.dmp

                    memory/4932-65-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-61-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-66-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-67-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-62-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-68-0x00007FFD31760000-0x00007FFD31770000-memory.dmp

                    memory/4932-59-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-69-0x00007FFD31760000-0x00007FFD31770000-memory.dmp

                    memory/4932-60-0x00007FFD33D50000-0x00007FFD33D60000-memory.dmp

                    memory/4932-57-0x00007FFD33D50000-0x00007FFD33D60000-memory.dmp

                    memory/4932-53-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-52-0x00007FFD33D50000-0x00007FFD33D60000-memory.dmp

                    memory/4932-93-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-94-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-95-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp

                    memory/4932-96-0x00007FFD73CD0000-0x00007FFD73EC5000-memory.dmp