Analysis

  • max time kernel
    172s
  • max time network
    211s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    30-11-2022 16:52

General

  • Target

    59b2725f7466da2b7426c5d2b64af386c128e313738a0cd5a838a5ec3ca90b5c.exe

  • Size

    2.7MB

  • MD5

    533a8b7d2d523e95e31f517ea0e432de

  • SHA1

    64e003d9c733196f1c1569ee40c64983cc6e4127

  • SHA256

    59b2725f7466da2b7426c5d2b64af386c128e313738a0cd5a838a5ec3ca90b5c

  • SHA512

    b777d95be33e9b9cd5e0f4e5d9c494b83be0f835697bf9b358c7cc93acf6f2ef35f2ac502b9f96030c0262a0c5289d072b0920cd9ea46eea0fa1b4cc59136c4f

  • SSDEEP

    49152:NUF0bDj03kJVsDZj3dE1juUo5XipVmaiDQ2EX8q8bgZvakhJGFLBz8LS:NUFUjmmVsDhNYj/VpVzh2I4S0FLBz8LS

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

RAT

C2

23.105.131.178:7812

Mutex

VNM_MUTEX_gdy9bWxR0te3WgTRnI

Attributes
  • encryption_key

    MDXzdQumRqZGIeya7nG9

  • install_name

    Windows Defender Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update

  • subdirectory

    Microsoft

Signatures

  • Contains code to disable Windows Defender 8 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 8 IoCs
  • VenomRAT

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

  • Executes dropped EXE 3 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 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.

  • 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.

  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 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\59b2725f7466da2b7426c5d2b64af386c128e313738a0cd5a838a5ec3ca90b5c.exe
    "C:\Users\Admin\AppData\Local\Temp\59b2725f7466da2b7426c5d2b64af386c128e313738a0cd5a838a5ec3ca90b5c.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1236
    • C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe
      "C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe"
      2⤵
      • Modifies Windows Defender Real-time Protection settings
      • Executes dropped EXE
      • Loads dropped DLL
      • Windows security modification
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1536
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Defender Security.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:844
      • C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe
        "C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe"
        3⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1776
        • C:\Windows\SysWOW64\schtasks.exe
          "schtasks" /create /tn "Windows Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe" /rl HIGHEST /f
          4⤵
          • Creates scheduled task(s)
          PID:1352
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "powershell" Get-MpPreference -verbose
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1932
      • 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:1300
        • 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:608
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Users\Admin\AppData\Local\Temp\6XI7N2vQHA5W.bat" "
        3⤵
          PID:1348
      • C:\Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe
        "C:\Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe"
        2⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:520
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 520 -s 36148
          3⤵
          • Loads dropped DLL
          • Program crash
          PID:1560

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\AppData\Local\Temp\6XI7N2vQHA5W.bat

      Filesize

      219B

      MD5

      2f31b22ec0ca4aae519ed45892c0d8c6

      SHA1

      7707d5a5817b3ad44f9d59fb18d9da4f0435bd16

      SHA256

      2e7993852fc1f87bbd0e0fa50847baef353e77ac12f2c0cb0712893ced267a7b

      SHA512

      4f376e438616e5953a6c59ccec700cfbb3241f1b97f3198c2c88f143dcaa512289d2468bd0495a75793550d85da6a501c2a686b9655557248440180f8248d74d

    • C:\Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe

      Filesize

      2.8MB

      MD5

      555a824b8efc10e007b77675161fbfb8

      SHA1

      b4cf844d2bdd4580aa469341e8613ff6a67d2111

      SHA256

      e458a300574507d1bc999871b5a679494d69eef97c2fcff42715e3148d57646e

      SHA512

      b4fb2092fb1cf6ee94700e29336b0c109f4f2f8a8fcd53e56b136ff62d124d342024496281accaede0b84a5e46e2f7350f3f31b4a1e2d2ffd02436f61b78be8d

    • C:\Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe

      Filesize

      2.8MB

      MD5

      555a824b8efc10e007b77675161fbfb8

      SHA1

      b4cf844d2bdd4580aa469341e8613ff6a67d2111

      SHA256

      e458a300574507d1bc999871b5a679494d69eef97c2fcff42715e3148d57646e

      SHA512

      b4fb2092fb1cf6ee94700e29336b0c109f4f2f8a8fcd53e56b136ff62d124d342024496281accaede0b84a5e46e2f7350f3f31b4a1e2d2ffd02436f61b78be8d

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

      Filesize

      535KB

      MD5

      6f3b107a20b18244efb6473bae2544b1

      SHA1

      dc02ec107547c515bffeadcd87e6308c3bdfd390

      SHA256

      2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

      SHA512

      318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

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

      Filesize

      535KB

      MD5

      6f3b107a20b18244efb6473bae2544b1

      SHA1

      dc02ec107547c515bffeadcd87e6308c3bdfd390

      SHA256

      2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

      SHA512

      318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

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

      Filesize

      535KB

      MD5

      6f3b107a20b18244efb6473bae2544b1

      SHA1

      dc02ec107547c515bffeadcd87e6308c3bdfd390

      SHA256

      2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

      SHA512

      318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

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

      Filesize

      535KB

      MD5

      6f3b107a20b18244efb6473bae2544b1

      SHA1

      dc02ec107547c515bffeadcd87e6308c3bdfd390

      SHA256

      2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

      SHA512

      318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

    • \Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe

      Filesize

      2.8MB

      MD5

      555a824b8efc10e007b77675161fbfb8

      SHA1

      b4cf844d2bdd4580aa469341e8613ff6a67d2111

      SHA256

      e458a300574507d1bc999871b5a679494d69eef97c2fcff42715e3148d57646e

      SHA512

      b4fb2092fb1cf6ee94700e29336b0c109f4f2f8a8fcd53e56b136ff62d124d342024496281accaede0b84a5e46e2f7350f3f31b4a1e2d2ffd02436f61b78be8d

    • \Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe

      Filesize

      2.8MB

      MD5

      555a824b8efc10e007b77675161fbfb8

      SHA1

      b4cf844d2bdd4580aa469341e8613ff6a67d2111

      SHA256

      e458a300574507d1bc999871b5a679494d69eef97c2fcff42715e3148d57646e

      SHA512

      b4fb2092fb1cf6ee94700e29336b0c109f4f2f8a8fcd53e56b136ff62d124d342024496281accaede0b84a5e46e2f7350f3f31b4a1e2d2ffd02436f61b78be8d

    • \Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe

      Filesize

      2.8MB

      MD5

      555a824b8efc10e007b77675161fbfb8

      SHA1

      b4cf844d2bdd4580aa469341e8613ff6a67d2111

      SHA256

      e458a300574507d1bc999871b5a679494d69eef97c2fcff42715e3148d57646e

      SHA512

      b4fb2092fb1cf6ee94700e29336b0c109f4f2f8a8fcd53e56b136ff62d124d342024496281accaede0b84a5e46e2f7350f3f31b4a1e2d2ffd02436f61b78be8d

    • \Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe

      Filesize

      2.8MB

      MD5

      555a824b8efc10e007b77675161fbfb8

      SHA1

      b4cf844d2bdd4580aa469341e8613ff6a67d2111

      SHA256

      e458a300574507d1bc999871b5a679494d69eef97c2fcff42715e3148d57646e

      SHA512

      b4fb2092fb1cf6ee94700e29336b0c109f4f2f8a8fcd53e56b136ff62d124d342024496281accaede0b84a5e46e2f7350f3f31b4a1e2d2ffd02436f61b78be8d

    • \Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe

      Filesize

      2.8MB

      MD5

      555a824b8efc10e007b77675161fbfb8

      SHA1

      b4cf844d2bdd4580aa469341e8613ff6a67d2111

      SHA256

      e458a300574507d1bc999871b5a679494d69eef97c2fcff42715e3148d57646e

      SHA512

      b4fb2092fb1cf6ee94700e29336b0c109f4f2f8a8fcd53e56b136ff62d124d342024496281accaede0b84a5e46e2f7350f3f31b4a1e2d2ffd02436f61b78be8d

    • \Users\Admin\AppData\Roaming\Amazon valid emails by Scorpio.exe

      Filesize

      2.8MB

      MD5

      555a824b8efc10e007b77675161fbfb8

      SHA1

      b4cf844d2bdd4580aa469341e8613ff6a67d2111

      SHA256

      e458a300574507d1bc999871b5a679494d69eef97c2fcff42715e3148d57646e

      SHA512

      b4fb2092fb1cf6ee94700e29336b0c109f4f2f8a8fcd53e56b136ff62d124d342024496281accaede0b84a5e46e2f7350f3f31b4a1e2d2ffd02436f61b78be8d

    • \Users\Admin\AppData\Roaming\Microsoft\Windows Defender Security.exe

      Filesize

      535KB

      MD5

      6f3b107a20b18244efb6473bae2544b1

      SHA1

      dc02ec107547c515bffeadcd87e6308c3bdfd390

      SHA256

      2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

      SHA512

      318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

    • \Users\Admin\AppData\Roaming\Windows Defender Security.exe

      Filesize

      535KB

      MD5

      6f3b107a20b18244efb6473bae2544b1

      SHA1

      dc02ec107547c515bffeadcd87e6308c3bdfd390

      SHA256

      2b23c8f0299f92a4ba0f7d4eea26316cf2ffae2eaf41767ce452464c9951b2a0

      SHA512

      318b51a7bc6a37f9a4d2ee528d66124b541c9d3f2002ad7a15456071fe090cdb264f6439dbc3fa5471200d2faf5217d01af56b3eafa2830917480b080d31161c

    • memory/520-66-0x00000000009E0000-0x0000000000CB4000-memory.dmp

      Filesize

      2.8MB

    • memory/520-61-0x0000000000000000-mapping.dmp

    • memory/608-89-0x0000000000000000-mapping.dmp

    • memory/844-75-0x0000000000000000-mapping.dmp

    • memory/1236-55-0x0000000074200000-0x00000000747AB000-memory.dmp

      Filesize

      5.7MB

    • memory/1236-54-0x0000000074FD1000-0x0000000074FD3000-memory.dmp

      Filesize

      8KB

    • memory/1236-64-0x0000000074200000-0x00000000747AB000-memory.dmp

      Filesize

      5.7MB

    • memory/1300-88-0x0000000000000000-mapping.dmp

    • memory/1348-91-0x0000000000000000-mapping.dmp

    • memory/1352-83-0x0000000000000000-mapping.dmp

    • memory/1536-57-0x0000000000000000-mapping.dmp

    • memory/1536-65-0x00000000009B0000-0x0000000000A3C000-memory.dmp

      Filesize

      560KB

    • memory/1560-69-0x0000000000000000-mapping.dmp

    • memory/1776-81-0x00000000001E0000-0x000000000026C000-memory.dmp

      Filesize

      560KB

    • memory/1776-77-0x0000000000000000-mapping.dmp

    • memory/1932-80-0x0000000000000000-mapping.dmp

    • memory/1932-85-0x000000006E0D0000-0x000000006E67B000-memory.dmp

      Filesize

      5.7MB

    • memory/1932-86-0x000000006E0D0000-0x000000006E67B000-memory.dmp

      Filesize

      5.7MB

    • memory/1932-87-0x000000006E0D0000-0x000000006E67B000-memory.dmp

      Filesize

      5.7MB