Resubmissions

17-04-2023 11:32

230417-nnmdnafe8v 10

05-08-2022 09:37

220805-lll9rshgh8 10

Analysis

  • max time kernel
    138s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20220718-en
  • resource tags

    arch:x64arch:x86image:win7-20220718-enlocale:en-usos:windows7-x64system
  • submitted
    05-08-2022 09:37

General

  • Target

    bby.exe

  • Size

    16.0MB

  • MD5

    d7e48e5a49efe9ed774546fa7d35d71a

  • SHA1

    06212065ffe07d1321c8d85bf5c45871683fb197

  • SHA256

    b4f6e6290b1e185bff0baf1b1f3a16291bb2ceb3528051a2aa9528c43231e710

  • SHA512

    7dcfc267f527d27d6cb58bd950241b4a8a658b34bc4696f308fd5448b4111d64b93078fedf8d2c138eef83b6148372d8c887b74aae8291fc05c665fbe3d4eeb1

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Office04

C2

cable-cp.at.playit.gg:21596

Mutex

VNM_MUTEX_c2q7y2ayYutZ2XaYe7

Attributes
  • encryption_key

    GDDG0qqm5dHuoT6GjWWz

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Microsoft one Drive

  • subdirectory

    SubDir

Signatures

  • Contains code to disable Windows Defender 14 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 14 IoCs
  • VenomRAT

    VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

  • Executes dropped EXE 4 IoCs
  • Deletes itself 1 IoCs
  • Loads dropped DLL 8 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Drops file in System32 directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bby.exe
    "C:\Users\Admin\AppData\Local\Temp\bby.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2024
    • C:\Users\Admin\AppData\Local\Temp\paypal.exe
      "C:\Users\Admin\AppData\Local\Temp\paypal.exe"
      2⤵
      • Modifies Windows Defender Real-time Protection settings
      • Executes dropped EXE
      • Loads dropped DLL
      • Windows security modification
      • Adds Run key to start application
      • Drops file in System32 directory
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:908
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Microsoft one Drive" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\paypal.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:468
      • C:\Windows\SysWOW64\SubDir\Client.exe
        "C:\Windows\SysWOW64\SubDir\Client.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:540
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks" /create /tn "Microsoft one Drive" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\Client.exe" /rl HIGHEST /f
          4⤵
          • Creates scheduled task(s)
          PID:828
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:804
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:288
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
          4⤵
          • Deletes itself
          PID:1528
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\a4T53C7mj2TX.bat" "
        3⤵
        • Loads dropped DLL
        • Suspicious use of WriteProcessMemory
        PID:1940
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
            PID:952
          • C:\Windows\SysWOW64\PING.EXE
            ping -n 10 localhost
            4⤵
            • Runs ping.exe
            PID:1572
          • C:\Users\Admin\AppData\Local\Temp\Paypal.exe
            "C:\Users\Admin\AppData\Local\Temp\paypal.exe"
            4⤵
            • Executes dropped EXE
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1432
      • C:\Users\Admin\AppData\Local\Temp\Proxy Shifter.exe
        "C:\Users\Admin\AppData\Local\Temp\Proxy Shifter.exe"
        2⤵
        • Executes dropped EXE
        PID:1916

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\Paypal.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • C:\Users\Admin\AppData\Local\Temp\Paypal.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • C:\Users\Admin\AppData\Local\Temp\Proxy Shifter.exe

      Filesize

      36.8MB

      MD5

      7cbac120d865d4c4c218b06144580b0a

      SHA1

      19afc5f464e84dc362459ab53dd3b6947b708d2e

      SHA256

      77f211fe4f26bbf491ee2a4eb6ac07a123a1ae40b59062d88c222e61b60c082b

      SHA512

      439ffd9e287b9c7468c9f85b52f0734b8b98e4b917576b2e87a6775b0d65b3da3103341c743b93722726795eadf86148c1b2c573a6f4a7b1c2cf5f307cfca625

    • C:\Users\Admin\AppData\Local\Temp\Proxy Shifter.exe

      Filesize

      36.8MB

      MD5

      7cbac120d865d4c4c218b06144580b0a

      SHA1

      19afc5f464e84dc362459ab53dd3b6947b708d2e

      SHA256

      77f211fe4f26bbf491ee2a4eb6ac07a123a1ae40b59062d88c222e61b60c082b

      SHA512

      439ffd9e287b9c7468c9f85b52f0734b8b98e4b917576b2e87a6775b0d65b3da3103341c743b93722726795eadf86148c1b2c573a6f4a7b1c2cf5f307cfca625

    • C:\Users\Admin\AppData\Local\Temp\a4T53C7mj2TX.bat

      Filesize

      203B

      MD5

      825c62b9fec443b635cdb6df73240311

      SHA1

      1a1b9e45fd0332b545d5a2f5f15c8a5289d75910

      SHA256

      558d2c3e1751ef5e650bcde081dc647611c148a24a707d404dcd430e3a3cbed2

      SHA512

      37d93a5bdc34409dd381e0b968a5c78a9ba83c99caa436cb6b162c39351cc085c2744458480c8727c3fb8a61699969e501aa822cc265c2c186946b6cb2be7754

    • C:\Users\Admin\AppData\Local\Temp\disabler.bat

      Filesize

      7KB

      MD5

      e266c8567fa86919495a208ad79ba615

      SHA1

      3c83f03a2df24ee8db840f09098d494fb98a1688

      SHA256

      c938e4d9a5bfaf87a1d2975eb6e8defa7beba61fd74dd47c850576f205ba9c62

      SHA512

      65370d923d7ac47bb6f212557318c51e60976de1a6136bd67321e28dcf6eba45b8d3f0cfe9723999c9a101b17f2c6ef1a11b6de77baff84cbfd5c71e707c6949

    • C:\Users\Admin\AppData\Local\Temp\paypal.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • C:\Windows\SysWOW64\SubDir\Client.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • C:\Windows\SysWOW64\SubDir\Client.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • \Users\Admin\AppData\Local\Temp\Paypal.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • \Users\Admin\AppData\Local\Temp\Paypal.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • \Users\Admin\AppData\Local\Temp\Paypal.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • \Users\Admin\AppData\Local\Temp\Paypal.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • \Users\Admin\AppData\Local\Temp\Paypal.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • \Users\Admin\AppData\Local\Temp\Proxy Shifter.exe

      Filesize

      36.8MB

      MD5

      7cbac120d865d4c4c218b06144580b0a

      SHA1

      19afc5f464e84dc362459ab53dd3b6947b708d2e

      SHA256

      77f211fe4f26bbf491ee2a4eb6ac07a123a1ae40b59062d88c222e61b60c082b

      SHA512

      439ffd9e287b9c7468c9f85b52f0734b8b98e4b917576b2e87a6775b0d65b3da3103341c743b93722726795eadf86148c1b2c573a6f4a7b1c2cf5f307cfca625

    • \Users\Admin\AppData\Local\Temp\Proxy Shifter.exe

      Filesize

      36.8MB

      MD5

      7cbac120d865d4c4c218b06144580b0a

      SHA1

      19afc5f464e84dc362459ab53dd3b6947b708d2e

      SHA256

      77f211fe4f26bbf491ee2a4eb6ac07a123a1ae40b59062d88c222e61b60c082b

      SHA512

      439ffd9e287b9c7468c9f85b52f0734b8b98e4b917576b2e87a6775b0d65b3da3103341c743b93722726795eadf86148c1b2c573a6f4a7b1c2cf5f307cfca625

    • \Windows\SysWOW64\SubDir\Client.exe

      Filesize

      672KB

      MD5

      561a7ddda53177362dc0ac85ec84421e

      SHA1

      1d0f2a9dd397a6d435063fcdd76f02dd04ab1b7a

      SHA256

      b3e2c9fbc435b5e2f552234b0e1c4ec7bb2ebe5f53413268b1089038cfe5748b

      SHA512

      8dfcaf20f68e0c9ba7e768929e12e930a466d352ae8f5b452af0e603722e048b60fb4272c280a52f87eb3d3f25ce691ed6afd4285f440f18d68af22fe8d6f6d1

    • memory/288-80-0x0000000000000000-mapping.dmp

    • memory/468-68-0x0000000000000000-mapping.dmp

    • memory/540-70-0x0000000000000000-mapping.dmp

    • memory/540-73-0x0000000000FB0000-0x000000000105E000-memory.dmp

      Filesize

      696KB

    • memory/804-75-0x0000000000000000-mapping.dmp

    • memory/804-78-0x000000006EB60000-0x000000006F10B000-memory.dmp

      Filesize

      5.7MB

    • memory/804-79-0x000000006EB60000-0x000000006F10B000-memory.dmp

      Filesize

      5.7MB

    • memory/828-77-0x0000000000000000-mapping.dmp

    • memory/908-66-0x0000000000360000-0x000000000040E000-memory.dmp

      Filesize

      696KB

    • memory/908-59-0x0000000000000000-mapping.dmp

    • memory/952-86-0x0000000000000000-mapping.dmp

    • memory/1432-89-0x0000000000000000-mapping.dmp

    • memory/1432-91-0x0000000000AC0000-0x0000000000B6E000-memory.dmp

      Filesize

      696KB

    • memory/1528-81-0x0000000000000000-mapping.dmp

    • memory/1572-87-0x0000000000000000-mapping.dmp

    • memory/1916-63-0x0000000000000000-mapping.dmp

    • memory/1940-84-0x0000000000000000-mapping.dmp

    • memory/2024-54-0x0000000075D01000-0x0000000075D03000-memory.dmp

      Filesize

      8KB