Analysis

  • max time kernel
    152s
  • max time network
    156s
  • platform
    windows10_x64
  • resource
    win10-en-20211208
  • submitted
    01-01-2022 17:39

General

  • Target

    fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f.exe

  • Size

    535KB

  • MD5

    8ec725efd4c12cb8c7e44f964a343ab8

  • SHA1

    8c5bf29556afd3fe1d4dc6424c422903b9d03073

  • SHA256

    fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f

  • SHA512

    4c2be251a75c1f274af141ef153efe76a15cd42b631a0041bcbc351a717ca8b0a8f92d7010261ec019185527e0785d777ca1f6d80bba3fbbcf61fc1d6d41357a

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Hacked

C2

AUTHGG-37696.portmap.host:37696

Mutex

VNM_MUTEX_wX978IqIpFgn6uoBO6

Attributes
  • encryption_key

    39b1ysbZHxi3Lh3NMkbU

  • install_name

    Host Process for Windows Tasks.exe

  • log_directory

    Microsoft

  • reconnect_delay

    1000

  • startup_key

    Host Process for Setting Synchronization

  • subdirectory

    MIcrosoft

Extracted

Family

quasar

Mutex

Attributes
  • encryption_key

  • install_name

  • log_directory

  • reconnect_delay

    1000

  • startup_key

  • subdirectory

Signatures

  • Contains code to disable Windows Defender 9 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 9 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 1 IoCs
  • Windows security modification 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.

  • Drops file in Program Files directory 5 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.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f.exe
    "C:\Users\Admin\AppData\Local\Temp\fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f.exe"
    1⤵
    • Windows security modification
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3240
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Host Process for Setting Synchronization" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:656
    • C:\Program Files (x86)\MIcrosoft\Host Process for Windows Tasks.exe
      "C:\Program Files (x86)\MIcrosoft\Host Process for Windows Tasks.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1536
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Host Process for Setting Synchronization" /sc ONLOGON /tr "C:\Program Files (x86)\MIcrosoft\Host Process for Windows Tasks.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:3220
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" Get-MpPreference -verbose
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3388
    • 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:2396
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /K del /q/f/s C:\Users\Admin\AppData\Local\Temp\*
        3⤵
          PID:4016
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\CFnQaJ4589CZ.bat" "
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2052
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          3⤵
            PID:2200
          • C:\Windows\SysWOW64\PING.EXE
            ping -n 10 localhost
            3⤵
            • Runs ping.exe
            PID:1448
          • C:\Users\Admin\AppData\Local\Temp\fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f.exe
            "C:\Users\Admin\AppData\Local\Temp\fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f.exe"
            3⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4024

      Network

      MITRE ATT&CK Enterprise v6

      Replay Monitor

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      Downloads

      • C:\Program Files (x86)\MIcrosoft\Host Process for Windows Tasks.exe

        MD5

        8ec725efd4c12cb8c7e44f964a343ab8

        SHA1

        8c5bf29556afd3fe1d4dc6424c422903b9d03073

        SHA256

        fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f

        SHA512

        4c2be251a75c1f274af141ef153efe76a15cd42b631a0041bcbc351a717ca8b0a8f92d7010261ec019185527e0785d777ca1f6d80bba3fbbcf61fc1d6d41357a

      • C:\Program Files (x86)\MIcrosoft\Host Process for Windows Tasks.exe

        MD5

        8ec725efd4c12cb8c7e44f964a343ab8

        SHA1

        8c5bf29556afd3fe1d4dc6424c422903b9d03073

        SHA256

        fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f

        SHA512

        4c2be251a75c1f274af141ef153efe76a15cd42b631a0041bcbc351a717ca8b0a8f92d7010261ec019185527e0785d777ca1f6d80bba3fbbcf61fc1d6d41357a

      • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\fe017545d9438e8491e09152ec9d4ee9faa9aaf64b601f500db2314260204e2f.exe.log

        MD5

        1efce85e583a7a2f123317a20f889d04

        SHA1

        60f71aa73ea2e2a48ed1c17e3c6d440abf39c914

        SHA256

        2b5532a94879134a876b11c188ade1a61deaba6a80fe1f3a3a77cc442f1cca0d

        SHA512

        45a5cd283e6a6ac34c3d8b1a6d73dc1cf52d8c974cf84624e8e9924eddaf354ccda929bce728b47db2b62175e47bdc3eaca6bc6b84d3565881fa87c50319d24c

      • C:\Users\Admin\AppData\Local\Temp\CFnQaJ4589CZ.bat

        MD5

        b873b87e28bef2ae1f4b8665ff8674ee

        SHA1

        7be0f1a1a074cfa3bff0ea91ece1305b6687dc96

        SHA256

        c722f2ff94b53145070949e91f873b604442034139a575456724daeea20d2b1f

        SHA512

        e85f0e8c8fda6700aa337901dc90ea8945f707afc0e2f6943d4edb62f44499a1a07cd94e75e9ca4802472e06d3331dc87c19a1ce8339735937ed909c9f78da73

      • memory/656-126-0x0000000000000000-mapping.dmp

      • memory/1448-397-0x0000000000000000-mapping.dmp

      • memory/1536-131-0x0000000000410000-0x000000000049C000-memory.dmp

        Filesize

        560KB

      • memory/1536-153-0x00000000063B0000-0x00000000063BA000-memory.dmp

        Filesize

        40KB

      • memory/1536-127-0x0000000000000000-mapping.dmp

      • memory/1536-150-0x0000000006030000-0x000000000606E000-memory.dmp

        Filesize

        248KB

      • memory/1536-146-0x0000000004DE0000-0x0000000004E46000-memory.dmp

        Filesize

        408KB

      • memory/1536-132-0x0000000000410000-0x000000000049C000-memory.dmp

        Filesize

        560KB

      • memory/1536-133-0x0000000005240000-0x000000000573E000-memory.dmp

        Filesize

        5.0MB

      • memory/1536-134-0x0000000004E80000-0x0000000004F12000-memory.dmp

        Filesize

        584KB

      • memory/1536-135-0x0000000004D40000-0x000000000523E000-memory.dmp

        Filesize

        5.0MB

      • memory/1536-149-0x0000000005220000-0x0000000005232000-memory.dmp

        Filesize

        72KB

      • memory/2052-394-0x0000000000000000-mapping.dmp

      • memory/2200-396-0x0000000000000000-mapping.dmp

      • memory/2396-392-0x0000000000000000-mapping.dmp

      • memory/3220-151-0x0000000000000000-mapping.dmp

      • memory/3240-118-0x0000000000430000-0x00000000004BC000-memory.dmp

        Filesize

        560KB

      • memory/3240-119-0x0000000000430000-0x00000000004BC000-memory.dmp

        Filesize

        560KB

      • memory/3240-120-0x00000000052E0000-0x00000000057DE000-memory.dmp

        Filesize

        5.0MB

      • memory/3240-121-0x0000000004DE0000-0x0000000004E72000-memory.dmp

        Filesize

        584KB

      • memory/3240-122-0x0000000004CF0000-0x0000000004CF1000-memory.dmp

        Filesize

        4KB

      • memory/3240-123-0x0000000004F80000-0x0000000004FE6000-memory.dmp

        Filesize

        408KB

      • memory/3240-124-0x0000000005270000-0x0000000005282000-memory.dmp

        Filesize

        72KB

      • memory/3240-125-0x0000000005E70000-0x0000000005EAE000-memory.dmp

        Filesize

        248KB

      • memory/3388-129-0x0000000000000000-mapping.dmp

      • memory/3388-176-0x00000000095B0000-0x0000000009655000-memory.dmp

        Filesize

        660KB

      • memory/3388-148-0x00000000085D0000-0x000000000861B000-memory.dmp

        Filesize

        300KB

      • memory/3388-136-0x0000000004770000-0x0000000004771000-memory.dmp

        Filesize

        4KB

      • memory/3388-138-0x0000000004890000-0x00000000048C6000-memory.dmp

        Filesize

        216KB

      • memory/3388-137-0x0000000004770000-0x0000000004771000-memory.dmp

        Filesize

        4KB

      • memory/3388-152-0x00000000083F0000-0x0000000008466000-memory.dmp

        Filesize

        472KB

      • memory/3388-145-0x0000000007D50000-0x00000000080A0000-memory.dmp

        Filesize

        3.3MB

      • memory/3388-154-0x0000000004770000-0x0000000004771000-memory.dmp

        Filesize

        4KB

      • memory/3388-162-0x0000000007720000-0x0000000007D48000-memory.dmp

        Filesize

        6.2MB

      • memory/3388-163-0x0000000009270000-0x00000000092A3000-memory.dmp

        Filesize

        204KB

      • memory/3388-164-0x0000000009270000-0x00000000092A3000-memory.dmp

        Filesize

        204KB

      • memory/3388-165-0x00000000072F0000-0x0000000007312000-memory.dmp

        Filesize

        136KB

      • memory/3388-166-0x0000000007390000-0x00000000073F6000-memory.dmp

        Filesize

        408KB

      • memory/3388-167-0x0000000007470000-0x00000000074D6000-memory.dmp

        Filesize

        408KB

      • memory/3388-168-0x00000000085D0000-0x000000000861B000-memory.dmp

        Filesize

        300KB

      • memory/3388-169-0x00000000083F0000-0x0000000008466000-memory.dmp

        Filesize

        472KB

      • memory/3388-170-0x0000000009250000-0x000000000926E000-memory.dmp

        Filesize

        120KB

      • memory/3388-171-0x000000007EF80000-0x000000007EF81000-memory.dmp

        Filesize

        4KB

      • memory/3388-147-0x0000000007600000-0x000000000761C000-memory.dmp

        Filesize

        112KB

      • memory/3388-177-0x0000000009790000-0x0000000009824000-memory.dmp

        Filesize

        592KB

      • memory/3388-178-0x00000000070E3000-0x00000000070E4000-memory.dmp

        Filesize

        4KB

      • memory/3388-371-0x0000000009690000-0x00000000096AA000-memory.dmp

        Filesize

        104KB

      • memory/3388-376-0x0000000009690000-0x00000000096AA000-memory.dmp

        Filesize

        104KB

      • memory/3388-377-0x0000000009680000-0x0000000009688000-memory.dmp

        Filesize

        32KB

      • memory/3388-382-0x0000000009680000-0x0000000009688000-memory.dmp

        Filesize

        32KB

      • memory/3388-141-0x0000000007390000-0x00000000073F6000-memory.dmp

        Filesize

        408KB

      • memory/3388-139-0x0000000007720000-0x0000000007D48000-memory.dmp

        Filesize

        6.2MB

      • memory/3388-143-0x0000000007470000-0x00000000074D6000-memory.dmp

        Filesize

        408KB

      • memory/3388-144-0x00000000070E2000-0x00000000070E3000-memory.dmp

        Filesize

        4KB

      • memory/3388-142-0x00000000070E0000-0x00000000070E1000-memory.dmp

        Filesize

        4KB

      • memory/3388-140-0x00000000072F0000-0x0000000007312000-memory.dmp

        Filesize

        136KB

      • memory/4016-393-0x0000000000000000-mapping.dmp

      • memory/4024-398-0x0000000000000000-mapping.dmp

      • memory/4024-400-0x0000000000010000-0x000000000009C000-memory.dmp

        Filesize

        560KB

      • memory/4024-401-0x0000000000010000-0x000000000009C000-memory.dmp

        Filesize

        560KB

      • memory/4024-402-0x0000000004E70000-0x000000000536E000-memory.dmp

        Filesize

        5.0MB

      • memory/4024-403-0x0000000004970000-0x0000000004A02000-memory.dmp

        Filesize

        584KB

      • memory/4024-404-0x0000000004970000-0x0000000004E6E000-memory.dmp

        Filesize

        5.0MB

      • memory/4024-405-0x00000000048E0000-0x0000000004946000-memory.dmp

        Filesize

        408KB