Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/03/2024, 20:02

General

  • Target
    ReksFN_Launcher.exe
  • Size 7.1MB
  • Sample240323-yshw5sec2t
  • SHA256 5ad6d5a8cb6a4ebb33932780c1992126832461aa9d5684424c6c6ea42ea8a08a
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.3.0.0

Botnet
  • Office04

C2
  • Vallithebest-32755.portmap.host:32755

Mutex
  • QSR_MUTEX_3gXoc7Rbb6gDK9k7Ha

Attributes
  • encryption_key

    6ti0U760Qb44URu6Tcg7

  • install_name

    WindowsSound.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WindowsSound.exe

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 17 IoCs
  • UPX packed file 56 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 48 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ReksFN_Launcher.exe
    "C:\Users\Admin\AppData\Local\Temp\ReksFN_Launcher.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3836
    • C:\Users\Admin\AppData\Local\Temp\ReksFN_Launcher.exe
      "C:\Users\Admin\AppData\Local\Temp\ReksFN_Launcher.exe"
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:4200
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "powershell -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\ReksFN_Launcher.exe'"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4456
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\ReksFN_Launcher.exe'
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3344
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "powershell Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend && powershell Set-MpPreference -SubmitSamplesConsent 2 & "%ProgramFiles%\Windows Defender\MpCmdRun.exe" -RemoveDefinitions -All"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1780
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell Set-MpPreference -DisableIntrusionPreventionSystem $true -DisableIOAVProtection $true -DisableRealtimeMonitoring $true -DisableScriptScanning $true -EnableControlledFolderAccess Disabled -EnableNetworkProtection AuditMode -Force -MAPSReporting Disabled -SubmitSamplesConsent NeverSend
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3152
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "powershell -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\bound.exe'"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2244
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -Command Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\bound.exe'
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1064
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "start bound.exe"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2348
        • C:\Users\Admin\AppData\Local\Temp\bound.exe
          bound.exe
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:1084
          • C:\Windows\SysWOW64\schtasks.exe
            "schtasks" /create /tn "WindowsSound.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\bound.exe" /rl HIGHEST /f
            5⤵
            • Creates scheduled task(s)
            PID:2228
          • C:\Users\Admin\AppData\Roaming\SubDir\WindowsSound.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\WindowsSound.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:4128
            • C:\Windows\SysWOW64\schtasks.exe
              "schtasks" /create /tn "WindowsSound.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\WindowsSound.exe" /rl HIGHEST /f
              6⤵
              • Creates scheduled task(s)
              PID:1424
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "mshta "javascript:var sh=new ActiveXObject('WScript.Shell'); sh.Popup('Ohh , make sure to turn VPN or Proxy off before using this kind of software', 0, 'ReksFN', 0+16);close()""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3456
        • C:\Windows\system32\mshta.exe
          mshta "javascript:var sh=new ActiveXObject('WScript.Shell'); sh.Popup('Ohh , make sure to turn VPN or Proxy off before using this kind of software', 0, 'ReksFN', 0+16);close()"
          4⤵
            PID:4848
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "tasklist /FO LIST"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1460
          • C:\Windows\system32\tasklist.exe
            tasklist /FO LIST
            4⤵
            • Enumerates processes with tasklist
            • Suspicious use of AdjustPrivilegeToken
            PID:1020
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "wmic csproduct get uuid"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3376
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic csproduct get uuid
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3088

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          powershell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
          • Size 2KB
          • SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 944B
          • SHA256 986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 944B
          • SHA256 385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233
          • MD5 SHA1 SHA512

          VCRUNTIME140.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\VCRUNTIME140.dll
          • Size 106KB
          • SHA256 a8f950b4357ec12cfccddc9094cca56a3d5244b95e09ea6e9a746489f2d58736
          • MD5 SHA1 SHA512 SSDEEP

          _bz2.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_bz2.pyd
          • Size 48KB
          • SHA256 abbe3933a34a9653a757244e8e55b0d7d3a108527a3e9e8a7f2013b5f2a9eff4
          • MD5 SHA1 SHA512 SSDEEP

          _ctypes.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_ctypes.pyd
          • Size 58KB
          • SHA256 64e8fd952ccf5b8adca80ce8c7bc6c96ec7df381789256fe8d326f111f02e95c
          • MD5 SHA1 SHA512 SSDEEP

          _decimal.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_decimal.pyd
          • Size 106KB
          • SHA256 c4e8740c5dbbd2741fc4124908da4b65fa9c3e17d9c9bf3f634710202e0c7009
          • MD5 SHA1 SHA512 SSDEEP

          _hashlib.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_hashlib.pyd
          • Size 35KB
          • SHA256 3660b985ca47ca1bba07db01458b3153e4e692ee57a8b23ce22f1a5ca18707c3
          • MD5 SHA1 SHA512 SSDEEP

          _hashlib.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_hashlib.pyd
          • Size 1KB
          • SHA256 50f87f25844394bf6ece4b7843c5c2c417a5cab416fd8e812a43ac83257c69d1
          • MD5 SHA1 SHA512

          _lzma.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_lzma.pyd
          • Size 85KB
          • SHA256 3c9d5a9433b22538fc64141cd3784800c567c18e4379003329cf69a1d59b2a41
          • MD5 SHA1 SHA512 SSDEEP

          _queue.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_queue.pyd
          • Size 25KB
          • SHA256 9d4880f7d0129b1de95becd8ea8bbbf0c044d63e87764d18f9ec00d382e43f84
          • MD5 SHA1 SHA512 SSDEEP

          _socket.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_socket.pyd
          • Size 43KB
          • SHA256 4e19f29266a3d6c127e5e8de01d2c9b68bc55075dd3d6aabe22cf0de4b946a98
          • MD5 SHA1 SHA512 SSDEEP

          _sqlite3.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_sqlite3.pyd
          • Size 56KB
          • SHA256 6b41dfd7d6ac12afe523d74a68f8bd984a75e438dcf2daa23a1f934ca02e89da
          • MD5 SHA1 SHA512 SSDEEP

          _ssl.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\_ssl.pyd
          • Size 62KB
          • SHA256 3e6e9fc56e1a9fe5edb39ee03e5d47fa0e3f6adb17be1f087dc6f891d3b0bbca
          • MD5 SHA1 SHA512 SSDEEP

          base_library.zip

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\base_library.zip
          • Size 389KB
          • SHA256 562950e6927a3b271d26dc83072c14bf9cdb72308f1e46dfc73f6b5a7959758e
          • MD5 SHA1 SHA512 SSDEEP

          blank.aes

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\blank.aes
          • Size 117KB
          • SHA256 49ab978d0c239b1640253428da6b4e608906254c6d916a311d42fc514b245c77
          • MD5 SHA1 SHA512 SSDEEP

          blank.aes

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\blank.aes
          • Size 117KB
          • SHA256 66a28f3f5f302ecbac1e29b1c27648816d5b9de992214494a51382d4614b1baf
          • MD5 SHA1 SHA512 SSDEEP

          bound.blank

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\bound.blank
          • Size 178KB
          • SHA256 68b5e5b0ee26ebfdd5fc9653f7d216c28b5c8ca93109606d7f79bd82ed1ea7f0
          • MD5 SHA1 SHA512 SSDEEP

          libcrypto-1_1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\libcrypto-1_1.dll
          • Size 451KB
          • SHA256 f2874f6bf33e89c1bc913de7cac6ed595c394522ba0646a5e3c0ed0564182109
          • MD5 SHA1 SHA512 SSDEEP

          libcrypto-1_1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\libcrypto-1_1.dll
          • Size 106KB
          • SHA256 474d122ffd3f97e1f7eac17bc65702d5d926dd072ffe488bc6edb1cbdb6762fb
          • MD5 SHA1 SHA512 SSDEEP

          libcrypto-1_1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\libcrypto-1_1.dll
          • Size 79KB
          • SHA256 30b601543f5c8276d5d193fd995def8f6682f9c656f7b783a0a6402892792ec0
          • MD5 SHA1 SHA512 SSDEEP

          libffi-8.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\libffi-8.dll
          • Size 29KB
          • SHA256 135c772b42ba6353757a4d076ce03dbf792456143b42d25a62066da46144fece
          • MD5 SHA1 SHA512 SSDEEP

          libssl-1_1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\libssl-1_1.dll
          • Size 204KB
          • SHA256 a6a14c1beccbd4128763e78c3ec588f747640297ffb3cc5604a9728e8ef246b1
          • MD5 SHA1 SHA512 SSDEEP

          libssl-1_1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\libssl-1_1.dll
          • Size 40KB
          • SHA256 be013eee04ef66341599ce85e2fdfd4131fa6aff0af36da668eb036cfc208339
          • MD5 SHA1 SHA512 SSDEEP

          python311.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\python311.dll
          • Size 1.6MB
          • SHA256 7e1370058177d78a415b7ed113cc15472974440d84267fc44cdc5729535e3967
          • MD5 SHA1 SHA512 SSDEEP

          rar.exe

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\rar.exe
          • Size 321KB
          • SHA256 2306c9b843e3551f2722d3c0e3678676a528548e423588de2450c9f08cdb1f65
          • MD5 SHA1 SHA512 SSDEEP

          rarreg.key

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\rarreg.key
          • Size 467B
          • SHA256 e63f3d6710097498085564dfc85add6ed4cf44238c33d20820d2426abcee4e31
          • MD5 SHA1 SHA512

          select.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\select.pyd
          • Size 25KB
          • SHA256 5bbbb4f0b4f9e5329ba1d518d6e8144b1f7d83e2d7eaf6c50eef6a304d78f37d
          • MD5 SHA1 SHA512 SSDEEP

          sqlite3.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\sqlite3.dll
          • Size 248KB
          • SHA256 b9626102cee0d337f2431b7defc86624df4aeb30f86cae888466d14987f702d5
          • MD5 SHA1 SHA512 SSDEEP

          sqlite3.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\sqlite3.dll
          • Size 128KB
          • SHA256 11b6a68e252bc9f1c2a4df625265b5469171a3fc873ffd12a6335f6b452dc238
          • MD5 SHA1 SHA512 SSDEEP

          unicodedata.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\unicodedata.pyd
          • Size 276KB
          • SHA256 c7b44640aae143634209ef85070a79ac3b62c6d47056c6bc99ced9ab70c2b38f
          • MD5 SHA1 SHA512 SSDEEP

          unicodedata.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI38362\unicodedata.pyd
          • Size 295KB
          • SHA256 987a6d21ce961afeaaa40ba69859d4dd80d20b77c4ca6d2b928305a873d6796d
          • MD5 SHA1 SHA512 SSDEEP

          __PSScriptPolicyTest_1uxqcws0.ugh.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1uxqcws0.ugh.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          bound.exe

          • Path C:\Users\Admin\AppData\Local\Temp\bound.exe
          • Size 348KB
          • SHA256 a16d45a7088e5e5cfe99101466a6c790cb15657c6b4f0d93c8fe2383bbbdddd7
          • MD5 SHA1 SHA512 SSDEEP

          memory/1064-97-0x00007FFE762B0000-0x00007FFE76D71000-memory.dmp

          memory/1064-130-0x00007FFE762B0000-0x00007FFE76D71000-memory.dmp

          memory/1064-126-0x0000016F99560000-0x0000016F99570000-memory.dmp

          memory/1064-98-0x0000016F99560000-0x0000016F99570000-memory.dmp

          memory/1084-127-0x0000000004BA0000-0x0000000004BB0000-memory.dmp

          memory/1084-164-0x0000000075190000-0x0000000075940000-memory.dmp

          memory/1084-124-0x0000000075190000-0x0000000075940000-memory.dmp

          memory/1084-151-0x0000000005170000-0x0000000005182000-memory.dmp

          memory/1084-100-0x00000000001B0000-0x000000000020E000-memory.dmp

          memory/1084-102-0x00000000051B0000-0x0000000005754000-memory.dmp

          memory/1084-131-0x0000000004C00000-0x0000000004C66000-memory.dmp

          memory/1084-156-0x0000000005E60000-0x0000000005E9C000-memory.dmp

          memory/1084-123-0x0000000004AD0000-0x0000000004B62000-memory.dmp

          memory/3152-101-0x00007FFE762B0000-0x00007FFE76D71000-memory.dmp

          memory/3152-112-0x0000018EA9C70000-0x0000018EA9C80000-memory.dmp

          memory/3152-113-0x0000018EA9C70000-0x0000018EA9C80000-memory.dmp

          memory/3152-99-0x0000018EA9BF0000-0x0000018EA9C12000-memory.dmp

          memory/3152-138-0x00007FFE762B0000-0x00007FFE76D71000-memory.dmp

          memory/3344-125-0x00007FFE762B0000-0x00007FFE76D71000-memory.dmp

          memory/3344-139-0x00007FFE762B0000-0x00007FFE76D71000-memory.dmp

          memory/4128-169-0x0000000004E10000-0x0000000004E20000-memory.dmp

          memory/4128-168-0x0000000075190000-0x0000000075940000-memory.dmp

          memory/4128-167-0x00000000064E0000-0x00000000064EA000-memory.dmp

          memory/4128-165-0x0000000004E10000-0x0000000004E20000-memory.dmp

          memory/4128-163-0x0000000075190000-0x0000000075940000-memory.dmp

          memory/4200-154-0x00007FFE83B60000-0x00007FFE83C7C000-memory.dmp

          memory/4200-33-0x00007FFE910C0000-0x00007FFE910CF000-memory.dmp

          memory/4200-79-0x00007FFE8B460000-0x00007FFE8B48E000-memory.dmp

          memory/4200-80-0x00007FFE8B440000-0x00007FFE8B454000-memory.dmp

          memory/4200-132-0x00007FFE84250000-0x00007FFE84839000-memory.dmp

          memory/4200-77-0x00007FFE8B430000-0x00007FFE8B43D000-memory.dmp

          memory/4200-66-0x00007FFE8D8F0000-0x00007FFE8D8FD000-memory.dmp

          memory/4200-142-0x00007FFE87ED0000-0x00007FFE87EFD000-memory.dmp

          memory/4200-149-0x00007FFE87AE0000-0x00007FFE87B98000-memory.dmp

          memory/4200-150-0x00007FFE78400000-0x00007FFE78778000-memory.dmp

          memory/4200-152-0x00007FFE8B440000-0x00007FFE8B454000-memory.dmp

          memory/4200-58-0x00007FFE8B3D0000-0x00007FFE8B3E9000-memory.dmp

          memory/4200-72-0x00007FFE78400000-0x00007FFE78778000-memory.dmp

          memory/4200-153-0x00007FFE8B430000-0x00007FFE8B43D000-memory.dmp

          memory/4200-71-0x00007FFE87AE0000-0x00007FFE87B98000-memory.dmp

          memory/4200-148-0x00007FFE8B460000-0x00007FFE8B48E000-memory.dmp

          memory/4200-147-0x00007FFE8D8F0000-0x00007FFE8D8FD000-memory.dmp

          memory/4200-56-0x00007FFE87ED0000-0x00007FFE87EFD000-memory.dmp

          memory/4200-146-0x00007FFE8B490000-0x00007FFE8B4A9000-memory.dmp

          memory/4200-145-0x00007FFE872A0000-0x00007FFE87417000-memory.dmp

          memory/4200-144-0x00007FFE87E40000-0x00007FFE87E63000-memory.dmp

          memory/4200-143-0x00007FFE8B3D0000-0x00007FFE8B3E9000-memory.dmp

          memory/4200-141-0x00007FFE910C0000-0x00007FFE910CF000-memory.dmp

          memory/4200-140-0x00007FFE88010000-0x00007FFE88033000-memory.dmp

          memory/4200-60-0x00007FFE87E40000-0x00007FFE87E63000-memory.dmp

          memory/4200-31-0x00007FFE88010000-0x00007FFE88033000-memory.dmp

          memory/4200-62-0x00007FFE872A0000-0x00007FFE87417000-memory.dmp

          memory/4200-64-0x00007FFE8B490000-0x00007FFE8B4A9000-memory.dmp

          memory/4200-75-0x000001A377180000-0x000001A3774F8000-memory.dmp

          memory/4200-26-0x00007FFE84250000-0x00007FFE84839000-memory.dmp

          memory/4200-83-0x00007FFE83B60000-0x00007FFE83C7C000-memory.dmp

          memory/4200-82-0x00007FFE88010000-0x00007FFE88033000-memory.dmp

          memory/4200-81-0x00007FFE84250000-0x00007FFE84839000-memory.dmp