Analysis

  • max time kernel
    84s
  • max time network
    151s
  • platform
    windows7_x64
  • resource
    win7-20220414-en
  • submitted
    04-06-2022 19:26

General

  • Target

    0x0008000000013a18-65.exe

  • Size

    535KB

  • MD5

    4d97786ab8047ad6c08532ed7a017573

  • SHA1

    a64d07233d813f9a085722295dca62ca726e291a

  • SHA256

    5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

  • SHA512

    9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

V/R/B

C2

siyatermi.duckdns.org:1518

Mutex

VNM_MUTEX_mJ6pCWZMe3OMOha5bj

Attributes
  • encryption_key

    g1Bi32PXFGwyBI9DJGTD

  • install_name

    Start Process.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Browser Module

  • subdirectory

    Sys Resources

Signatures

  • Contains code to disable Windows Defender 6 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 Payload 6 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • VenomRAT

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

  • suricata: ET MALWARE Common RAT Connectivity Check Observed

    suricata: ET MALWARE Common RAT Connectivity Check Observed

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 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.

  • 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 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe
    "C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe"
    1⤵
    • Modifies Windows Defender Real-time Protection settings
    • Loads dropped DLL
    • Windows security modification
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1972
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Browser Module" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:1684
    • C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe
      "C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:896
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Browser Module" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2032
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" Get-MpPreference -verbose
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1120
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /k start /b del /q/f/s %TEMP%\* & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1696
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
        3⤵
          PID:1512
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\ovMP9J8H5WIY.bat" "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1124
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          3⤵
            PID:1152
          • C:\Windows\SysWOW64\PING.EXE
            ping -n 10 localhost
            3⤵
            • Runs ping.exe
            PID:1960
          • C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe
            "C:\Users\Admin\AppData\Local\Temp\0x0008000000013a18-65.exe"
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1704

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\ovMP9J8H5WIY.bat

        Filesize

        218B

        MD5

        5c574a8cda8cdc7ca34626ea6dfe9737

        SHA1

        6f2e56d699eaf3cfb4bc0412df872755c1b1ca0a

        SHA256

        21664899404682a4b38e689266bd0dac36c6a566a60228c0e65ae5529dd4bb07

        SHA512

        b0cfd8fd38856700a5c9216dc9825bf848bc99e920a9c8e968a8945b1bd8a44f9e9172dfa1dc10785fa8addc8a65a184f4d3f452c5bf35c0f9084eb73659ed02

      • C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe

        Filesize

        535KB

        MD5

        4d97786ab8047ad6c08532ed7a017573

        SHA1

        a64d07233d813f9a085722295dca62ca726e291a

        SHA256

        5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

        SHA512

        9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

      • C:\Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe

        Filesize

        535KB

        MD5

        4d97786ab8047ad6c08532ed7a017573

        SHA1

        a64d07233d813f9a085722295dca62ca726e291a

        SHA256

        5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

        SHA512

        9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

      • \Users\Admin\AppData\Roaming\Sys Resources\Start Process.exe

        Filesize

        535KB

        MD5

        4d97786ab8047ad6c08532ed7a017573

        SHA1

        a64d07233d813f9a085722295dca62ca726e291a

        SHA256

        5a72c2a12e0e42313c5d01277d3b26f52810a9753e31883f5f3e7a73a0021870

        SHA512

        9224f6c0af0bb3aa6804e09b36617d2ecf762caf81ec0f2627553788f7045d09878b41ddb63a1d0779973cba52d2f1d59f69bc6c826ad8bb0d807444abab87d2

      • memory/896-84-0x00000000740B0000-0x000000007436B000-memory.dmp

        Filesize

        2.7MB

      • memory/896-79-0x0000000071370000-0x000000007208D000-memory.dmp

        Filesize

        13.1MB

      • memory/896-117-0x0000000072090000-0x0000000072AA0000-memory.dmp

        Filesize

        10.1MB

      • memory/896-86-0x0000000070A90000-0x0000000070B8C000-memory.dmp

        Filesize

        1008KB

      • memory/896-116-0x0000000072AA0000-0x0000000073E2F000-memory.dmp

        Filesize

        19.6MB

      • memory/896-85-0x0000000073EC0000-0x0000000073EE0000-memory.dmp

        Filesize

        128KB

      • memory/896-108-0x0000000070050000-0x0000000070119000-memory.dmp

        Filesize

        804KB

      • memory/896-65-0x0000000000000000-mapping.dmp

      • memory/896-107-0x0000000074520000-0x0000000074643000-memory.dmp

        Filesize

        1.1MB

      • memory/896-106-0x0000000070B90000-0x0000000071370000-memory.dmp

        Filesize

        7.9MB

      • memory/896-68-0x0000000000270000-0x00000000002FC000-memory.dmp

        Filesize

        560KB

      • memory/896-87-0x0000000070350000-0x0000000070A8E000-memory.dmp

        Filesize

        7.2MB

      • memory/896-118-0x0000000074700000-0x0000000074894000-memory.dmp

        Filesize

        1.6MB

      • memory/896-121-0x0000000074520000-0x0000000074643000-memory.dmp

        Filesize

        1.1MB

      • memory/896-120-0x0000000070B90000-0x0000000071370000-memory.dmp

        Filesize

        7.9MB

      • memory/896-119-0x0000000071370000-0x000000007208D000-memory.dmp

        Filesize

        13.1MB

      • memory/896-76-0x0000000072AA0000-0x0000000073E2F000-memory.dmp

        Filesize

        19.6MB

      • memory/896-77-0x0000000072090000-0x0000000072AA0000-memory.dmp

        Filesize

        10.1MB

      • memory/896-78-0x0000000074700000-0x0000000074894000-memory.dmp

        Filesize

        1.6MB

      • memory/1120-97-0x000000006CA60000-0x000000006CF96000-memory.dmp

        Filesize

        5.2MB

      • memory/1120-96-0x000000006F1D0000-0x000000006F77B000-memory.dmp

        Filesize

        5.7MB

      • memory/1120-81-0x000000006E6D0000-0x000000006F1C8000-memory.dmp

        Filesize

        11.0MB

      • memory/1120-82-0x000000006FBF0000-0x000000006FC71000-memory.dmp

        Filesize

        516KB

      • memory/1120-83-0x000000006D3C0000-0x000000006DC3A000-memory.dmp

        Filesize

        8.5MB

      • memory/1120-105-0x000000006D330000-0x000000006D3B5000-memory.dmp

        Filesize

        532KB

      • memory/1120-104-0x000000006C950000-0x000000006CA54000-memory.dmp

        Filesize

        1.0MB

      • memory/1120-103-0x000000006FBF0000-0x000000006FC71000-memory.dmp

        Filesize

        516KB

      • memory/1120-69-0x0000000000000000-mapping.dmp

      • memory/1120-88-0x000000006F860000-0x000000006FA95000-memory.dmp

        Filesize

        2.2MB

      • memory/1120-89-0x000000006FBA0000-0x000000006FBEB000-memory.dmp

        Filesize

        300KB

      • memory/1120-90-0x000000006FB70000-0x000000006FB95000-memory.dmp

        Filesize

        148KB

      • memory/1120-91-0x000000006D330000-0x000000006D3B5000-memory.dmp

        Filesize

        532KB

      • memory/1120-92-0x000000006D290000-0x000000006D32C000-memory.dmp

        Filesize

        624KB

      • memory/1120-93-0x000000006D0F0000-0x000000006D28E000-memory.dmp

        Filesize

        1.6MB

      • memory/1120-94-0x000000006D020000-0x000000006D0E3000-memory.dmp

        Filesize

        780KB

      • memory/1120-95-0x000000006FB30000-0x000000006FB5D000-memory.dmp

        Filesize

        180KB

      • memory/1120-102-0x000000006D3C0000-0x000000006DC3A000-memory.dmp

        Filesize

        8.5MB

      • memory/1120-101-0x000000006E6D0000-0x000000006F1C8000-memory.dmp

        Filesize

        11.0MB

      • memory/1120-98-0x000000006C830000-0x000000006C944000-memory.dmp

        Filesize

        1.1MB

      • memory/1120-99-0x000000006DF30000-0x000000006E6CC000-memory.dmp

        Filesize

        7.6MB

      • memory/1120-100-0x000000006C1D0000-0x000000006C821000-memory.dmp

        Filesize

        6.3MB

      • memory/1124-122-0x0000000000000000-mapping.dmp

      • memory/1152-124-0x0000000000000000-mapping.dmp

      • memory/1512-110-0x0000000000000000-mapping.dmp

      • memory/1684-63-0x0000000000000000-mapping.dmp

      • memory/1696-109-0x0000000000000000-mapping.dmp

      • memory/1704-130-0x0000000000000000-mapping.dmp

      • memory/1704-131-0x0000000000FD0000-0x000000000105C000-memory.dmp

        Filesize

        560KB

      • memory/1704-135-0x0000000074700000-0x0000000074894000-memory.dmp

        Filesize

        1.6MB

      • memory/1704-134-0x0000000072090000-0x0000000072AA0000-memory.dmp

        Filesize

        10.1MB

      • memory/1704-133-0x0000000072AA0000-0x0000000073E2F000-memory.dmp

        Filesize

        19.6MB

      • memory/1960-125-0x0000000000000000-mapping.dmp

      • memory/1972-74-0x00000000740B0000-0x000000007436B000-memory.dmp

        Filesize

        2.7MB

      • memory/1972-128-0x0000000071370000-0x000000007208D000-memory.dmp

        Filesize

        13.1MB

      • memory/1972-114-0x0000000070350000-0x0000000070A8E000-memory.dmp

        Filesize

        7.2MB

      • memory/1972-115-0x0000000073EC0000-0x0000000073EE0000-memory.dmp

        Filesize

        128KB

      • memory/1972-112-0x0000000072090000-0x0000000072AA0000-memory.dmp

        Filesize

        10.1MB

      • memory/1972-111-0x0000000072AA0000-0x0000000073E2F000-memory.dmp

        Filesize

        19.6MB

      • memory/1972-55-0x0000000075FE1000-0x0000000075FE3000-memory.dmp

        Filesize

        8KB

      • memory/1972-75-0x0000000070050000-0x0000000070119000-memory.dmp

        Filesize

        804KB

      • memory/1972-54-0x00000000009F0000-0x0000000000A7C000-memory.dmp

        Filesize

        560KB

      • memory/1972-73-0x0000000074520000-0x0000000074643000-memory.dmp

        Filesize

        1.1MB

      • memory/1972-72-0x0000000070B90000-0x0000000071370000-memory.dmp

        Filesize

        7.9MB

      • memory/1972-62-0x0000000070350000-0x0000000070A8E000-memory.dmp

        Filesize

        7.2MB

      • memory/1972-61-0x0000000070A90000-0x0000000070B8C000-memory.dmp

        Filesize

        1008KB

      • memory/1972-60-0x0000000073EC0000-0x0000000073EE0000-memory.dmp

        Filesize

        128KB

      • memory/1972-126-0x0000000072AA0000-0x0000000073E2F000-memory.dmp

        Filesize

        19.6MB

      • memory/1972-127-0x0000000072090000-0x0000000072AA0000-memory.dmp

        Filesize

        10.1MB

      • memory/1972-113-0x0000000071370000-0x000000007208D000-memory.dmp

        Filesize

        13.1MB

      • memory/1972-129-0x0000000070050000-0x0000000070119000-memory.dmp

        Filesize

        804KB

      • memory/1972-59-0x0000000071370000-0x000000007208D000-memory.dmp

        Filesize

        13.1MB

      • memory/1972-58-0x0000000074700000-0x0000000074894000-memory.dmp

        Filesize

        1.6MB

      • memory/1972-57-0x0000000072090000-0x0000000072AA0000-memory.dmp

        Filesize

        10.1MB

      • memory/1972-56-0x0000000072AA0000-0x0000000073E2F000-memory.dmp

        Filesize

        19.6MB

      • memory/2032-80-0x0000000000000000-mapping.dmp