Analysis

  • max time kernel
    45s
  • max time network
    96s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220414-en
  • submitted
    18-04-2022 11:50

General

  • Target

    1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe

  • Size

    655KB

  • MD5

    cf12948c21f9411602f6ee1b2ea3eb7d

  • SHA1

    e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

  • SHA256

    1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

  • SHA512

    3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows Security

C2

vilvaraj-32652.portmap.io:32652

Mutex

VNM_MUTEX_px0s48GfhAUBhjVpWU

Attributes
  • encryption_key

    yvDiKJ3lhd7v25pBa6mQ

  • install_name

    Windows Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Security

  • subdirectory

    SubDir

Signatures

  • Contains code to disable Windows Defender 1 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
  • Quasar Payload 1 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.

  • Executes dropped EXE 7 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Windows security modification 2 TTPs 2 IoCs
  • Adds Run key to start application 2 TTPs 2 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.

  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe
    "C:\Users\Admin\AppData\Local\Temp\1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1804
    • C:\Users\Admin\AppData\Local\Temp\1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe
      "C:\Users\Admin\AppData\Local\Temp\1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe"
      2⤵
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:2336
      • C:\Users\Admin\AppData\Local\Temp\1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe
        "C:\Users\Admin\AppData\Local\Temp\1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe"
        3⤵
        • Windows security modification
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1644
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks" /create /tn "Windows Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe" /rl HIGHEST /f
          4⤵
          • Creates scheduled task(s)
          PID:1100
        • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:3712
          • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
            5⤵
            • Executes dropped EXE
            PID:100
          • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
            5⤵
            • Executes dropped EXE
            PID:216
          • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:220
            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
              "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
              6⤵
              • Executes dropped EXE
              PID:3928
            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
              "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
              6⤵
              • Executes dropped EXE
              PID:4508
            • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe
              "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe"
              6⤵
              • Executes dropped EXE
              • Checks computer location settings
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of SetWindowsHookEx
              • Suspicious use of WriteProcessMemory
              PID:4484
              • C:\Windows\SysWOW64\schtasks.exe
                "schtasks" /create /tn "Windows Security" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe" /rl HIGHEST /f
                7⤵
                • Creates scheduled task(s)
                PID:548
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\R2qGNGzraw4Q.bat" "
                7⤵
                • Suspicious use of WriteProcessMemory
                PID:752
                • C:\Windows\SysWOW64\chcp.com
                  chcp 65001
                  8⤵
                    PID:508
                  • C:\Windows\SysWOW64\PING.EXE
                    ping -n 10 localhost
                    8⤵
                    • Runs ping.exe
                    PID:1372
                • C:\Windows\SysWOW64\WerFault.exe
                  C:\Windows\SysWOW64\WerFault.exe -u -p 4484 -s 1976
                  7⤵
                  • Program crash
                  PID:1584
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "powershell" Get-MpPreference -verbose
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1728
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4484 -ip 4484
      1⤵
        PID:2112

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e.exe.log

        Filesize

        507B

        MD5

        76ffb2f33cb32ade8fc862a67599e9d8

        SHA1

        920cc4ab75b36d2f9f6e979b74db568973c49130

        SHA256

        f1a3724670e3379318ec9c73f6f39058cab0ab013ba3cd90c047c3d701362310

        SHA512

        f33502c2e1bb30c05359bfc6819ca934642a1e01874e3060349127d792694d56ad22fccd6c9477b8ee50d66db35785779324273f509576b48b7f85577e001b4e

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

        Filesize

        507B

        MD5

        76ffb2f33cb32ade8fc862a67599e9d8

        SHA1

        920cc4ab75b36d2f9f6e979b74db568973c49130

        SHA256

        f1a3724670e3379318ec9c73f6f39058cab0ab013ba3cd90c047c3d701362310

        SHA512

        f33502c2e1bb30c05359bfc6819ca934642a1e01874e3060349127d792694d56ad22fccd6c9477b8ee50d66db35785779324273f509576b48b7f85577e001b4e

      • C:\Users\Admin\AppData\Local\Temp\R2qGNGzraw4Q.bat

        Filesize

        217B

        MD5

        418463266f6697de04c6cf827a3c4ea2

        SHA1

        efb4d8eb77fbc940b44e495ede59af44afc285b4

        SHA256

        48b4617fcfb9d8518da16ac994e3d39e90cb516d84980874f9f780eed5e7725b

        SHA512

        3de7e0ea6c557d57a1f5f68e918831ffba1e0fe25152bf88eb8913f3a726e0fdab4e2cb6c9b790f5c3fc44eb0df2e43e43cfa2b798d19a50549d5074825cd5f0

      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe

        Filesize

        655KB

        MD5

        cf12948c21f9411602f6ee1b2ea3eb7d

        SHA1

        e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

        SHA256

        1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

        SHA512

        3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe

        Filesize

        655KB

        MD5

        cf12948c21f9411602f6ee1b2ea3eb7d

        SHA1

        e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

        SHA256

        1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

        SHA512

        3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe

        Filesize

        655KB

        MD5

        cf12948c21f9411602f6ee1b2ea3eb7d

        SHA1

        e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

        SHA256

        1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

        SHA512

        3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe

        Filesize

        655KB

        MD5

        cf12948c21f9411602f6ee1b2ea3eb7d

        SHA1

        e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

        SHA256

        1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

        SHA512

        3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe

        Filesize

        655KB

        MD5

        cf12948c21f9411602f6ee1b2ea3eb7d

        SHA1

        e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

        SHA256

        1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

        SHA512

        3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe

        Filesize

        655KB

        MD5

        cf12948c21f9411602f6ee1b2ea3eb7d

        SHA1

        e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

        SHA256

        1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

        SHA512

        3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe

        Filesize

        655KB

        MD5

        cf12948c21f9411602f6ee1b2ea3eb7d

        SHA1

        e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

        SHA256

        1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

        SHA512

        3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

      • C:\Users\Admin\AppData\Roaming\SubDir\Windows Security.exe

        Filesize

        655KB

        MD5

        cf12948c21f9411602f6ee1b2ea3eb7d

        SHA1

        e8bbf3f9f04e2c428775b7d5b8801b66bd87e8a9

        SHA256

        1cbd590173371cacf94c493b7a603eaf43f301174e86ae49534f2879cd5dd57e

        SHA512

        3049fb6186c95bb9b03c0f6b70ce52c1b6e80b6d7162ca6655516dbd3ea58e9f621fd58460bb4bf0e6a9ef827cda1e4c890e94f3896d9aeedaed7c291c4d29ef

      • memory/100-147-0x0000000000000000-mapping.dmp

      • memory/216-149-0x0000000000000000-mapping.dmp

      • memory/220-151-0x0000000000000000-mapping.dmp

      • memory/508-171-0x0000000000000000-mapping.dmp

      • memory/548-166-0x0000000000000000-mapping.dmp

      • memory/752-169-0x0000000000000000-mapping.dmp

      • memory/1100-142-0x0000000000000000-mapping.dmp

      • memory/1372-172-0x0000000000000000-mapping.dmp

      • memory/1644-141-0x00000000067C0000-0x00000000067FC000-memory.dmp

        Filesize

        240KB

      • memory/1644-140-0x0000000006250000-0x0000000006262000-memory.dmp

        Filesize

        72KB

      • memory/1644-139-0x0000000005660000-0x00000000056C6000-memory.dmp

        Filesize

        408KB

      • memory/1644-137-0x0000000000400000-0x000000000048C000-memory.dmp

        Filesize

        560KB

      • memory/1644-136-0x0000000000000000-mapping.dmp

      • memory/1728-174-0x0000000070820000-0x000000007086C000-memory.dmp

        Filesize

        304KB

      • memory/1728-165-0x0000000005B90000-0x0000000005BF6000-memory.dmp

        Filesize

        408KB

      • memory/1728-179-0x0000000007890000-0x0000000007926000-memory.dmp

        Filesize

        600KB

      • memory/1728-146-0x0000000000000000-mapping.dmp

      • memory/1728-178-0x0000000007680000-0x000000000768A000-memory.dmp

        Filesize

        40KB

      • memory/1728-176-0x0000000007CA0000-0x000000000831A000-memory.dmp

        Filesize

        6.5MB

      • memory/1728-175-0x00000000068A0000-0x00000000068BE000-memory.dmp

        Filesize

        120KB

      • memory/1728-163-0x0000000005470000-0x0000000005A98000-memory.dmp

        Filesize

        6.2MB

      • memory/1728-164-0x0000000005440000-0x0000000005462000-memory.dmp

        Filesize

        136KB

      • memory/1728-173-0x00000000068C0000-0x00000000068F2000-memory.dmp

        Filesize

        200KB

      • memory/1728-154-0x0000000004D30000-0x0000000004D66000-memory.dmp

        Filesize

        216KB

      • memory/1728-167-0x0000000006390000-0x00000000063AE000-memory.dmp

        Filesize

        120KB

      • memory/1728-177-0x0000000007620000-0x000000000763A000-memory.dmp

        Filesize

        104KB

      • memory/1804-133-0x0000000005AB0000-0x0000000005B4C000-memory.dmp

        Filesize

        624KB

      • memory/1804-130-0x0000000000F50000-0x0000000000FFA000-memory.dmp

        Filesize

        680KB

      • memory/1804-131-0x0000000005FC0000-0x0000000006564000-memory.dmp

        Filesize

        5.6MB

      • memory/1804-132-0x0000000005A10000-0x0000000005AA2000-memory.dmp

        Filesize

        584KB

      • memory/2336-135-0x0000000000400000-0x0000000000492000-memory.dmp

        Filesize

        584KB

      • memory/2336-134-0x0000000000000000-mapping.dmp

      • memory/3712-143-0x0000000000000000-mapping.dmp

      • memory/3928-155-0x0000000000000000-mapping.dmp

      • memory/4484-168-0x0000000007210000-0x000000000721A000-memory.dmp

        Filesize

        40KB

      • memory/4484-159-0x0000000000000000-mapping.dmp

      • memory/4508-157-0x0000000000000000-mapping.dmp