Analysis

  • max time kernel
    98s
  • max time network
    95s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    06-11-2024 02:11

General

  • Target

    kreo q zi.7z

  • Size

    922KB

  • MD5

    ec516db688f94e98d5141f4bade557e9

  • SHA1

    198ffbae5eed415ac673f5e371774759f1a53de1

  • SHA256

    282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd

  • SHA512

    ecc34ad7d15fbedbbc4e62b469f5e6e5e71099e19831574da61dc9f751ed5b2faad1676b8b3dbf0911c4dac628c7a15e9d07d953692c5ab1b700ea07f6396985

  • SSDEEP

    24576:yScP7qLl4iGQATiKL0aywxTodSrUF+nVZLLymvgDoSAWcNtMXqWOU:07qLl4KATiJUo0UEnLmmvqiWcNtMXDOU

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

hola435-24858.portmap.host:24858

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes
  • encryption_key

    AEA258EF65BF1786F0F767C0BE2497ECC304C46F

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Drops file in Windows directory 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 27 IoCs
  • Suspicious use of FindShellTrayWindow 29 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Program Files\7-Zip\7zFM.exe
    "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\AppData\Local\Temp\kreo q zi.7z"
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:436
  • C:\Users\Admin\Desktop\kreo q zi.exe
    "C:\Users\Admin\Desktop\kreo q zi.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1684
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:448
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2056
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4804
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Drops file in Windows directory
    • Enumerates system info in registry
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1948
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=123.0.6312.123 --initial-client-data=0x220,0x224,0x228,0x1fc,0x22c,0x7ff9121fcc40,0x7ff9121fcc4c,0x7ff9121fcc58
      2⤵
        PID:4872
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-appcompat-clear --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAEAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --field-trial-handle=2016,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2012 /prefetch:2
        2⤵
          PID:1600
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --no-appcompat-clear --field-trial-handle=1860,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1920 /prefetch:3
          2⤵
            PID:3252
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=2292,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2444 /prefetch:8
            2⤵
              PID:4456
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --field-trial-handle=3172,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3180 /prefetch:1
              2⤵
                PID:812
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --field-trial-handle=3192,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3232 /prefetch:1
                2⤵
                  PID:3936
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --field-trial-handle=3780,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3768 /prefetch:1
                  2⤵
                    PID:2224
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=4060,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4616 /prefetch:8
                    2⤵
                      PID:5056
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=3716,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4880 /prefetch:8
                      2⤵
                        PID:1532
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --no-appcompat-clear --field-trial-handle=4492,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5032 /prefetch:8
                        2⤵
                          PID:1524
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=4824,i,15444828141725514432,13350099222091336597,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4760 /prefetch:8
                          2⤵
                            PID:4296
                        • C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe
                          "C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe"
                          1⤵
                            PID:2140
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                            1⤵
                              PID:4812

                            Network

                            MITRE ATT&CK Enterprise v15

                            Replay Monitor

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                            Downloads

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\BrowsingTopicsState

                              Filesize

                              649B

                              MD5

                              ade4353aadcf70c89ee21684cea911da

                              SHA1

                              fdf7b35852215ec8f99ffc53104458e605a5f098

                              SHA256

                              87c8966ff71a162a897380f4998a1080ab93cec3ac6d587ff61fa23d3bbd90ef

                              SHA512

                              7bdd79c79c2c886ffb4adffb90f76b1aee88b1a836c86282de8970dcb07eec984b2a46dbce14775e3c801f35c64720e4246099b206c4278ee5dbff1012434901

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\SCT Auditing Pending Reports

                              Filesize

                              2B

                              MD5

                              d751713988987e9331980363e24189ce

                              SHA1

                              97d170e1550eee4afc0af065b78cda302a97674c

                              SHA256

                              4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                              SHA512

                              b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity

                              Filesize

                              356B

                              MD5

                              7252a2e691f9528a880112e7992904a6

                              SHA1

                              30faf2805d1b1409d9dbd4ab96b560487a00655d

                              SHA256

                              28b354f62eda20793760b0c1fd11a18678ce1687b58906328998d3fef795f081

                              SHA512

                              caf80b4bd1638681212188c24ac3531b00f4b7205aee820dafd8aa333760ec2b68a28f7f1c8bfc9c2bfdef7dfa81cce0f1bbf8f89022097281c72b48513d59fe

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                              Filesize

                              8KB

                              MD5

                              7ad183f9045543f3b0b84d9553082593

                              SHA1

                              32b95a28e2fe7078d1777a2a8ae729e52d19dd67

                              SHA256

                              b862c03222e9b0b32ef4140a235ef3c4468b365828aee2393d49b58cfdb40dd3

                              SHA512

                              e5596f8bdef43c9b8597dabf49ff3913f3cf09339cbdba82bf2a241fc4807ff17ea10605a927422e9c9dc8a51e3772bec70735fc0aa08609bd617b607eedd16d

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State

                              Filesize

                              233KB

                              MD5

                              a2e12a791e28f6540227d1f7cedfce9a

                              SHA1

                              313f296304aacfbf75978960d6a14a7d7b1a1d4a

                              SHA256

                              447874ac878b7bbdcf88a9289cb025ae7a6e009e36aa7b8d16861329c12abf09

                              SHA512

                              e4a1a47a7a2a6eaf6764af4f8ef721159972def0bfcfb8d0ca229a2b78fbb74014d547426147d4fe3066ac560c85cd6b78f2de1bf23093e00fd9a8fcc434264e

                            • C:\Users\Admin\Desktop\kreo q zi.exe

                              Filesize

                              3.1MB

                              MD5

                              28ac02fc40c8f1c2a8989ee3c09a1372

                              SHA1

                              b182758b62a1482142c0fce4be78c786e08b7025

                              SHA256

                              0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b

                              SHA512

                              2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767

                            • memory/1684-9-0x00007FF917CF0000-0x00007FF9187B2000-memory.dmp

                              Filesize

                              10.8MB

                            • memory/1684-6-0x00007FF917CF0000-0x00007FF9187B2000-memory.dmp

                              Filesize

                              10.8MB

                            • memory/1684-5-0x0000000000CE0000-0x0000000001004000-memory.dmp

                              Filesize

                              3.1MB

                            • memory/1684-4-0x00007FF917CF3000-0x00007FF917CF5000-memory.dmp

                              Filesize

                              8KB

                            • memory/2056-14-0x00000000030E0000-0x00000000030F2000-memory.dmp

                              Filesize

                              72KB

                            • memory/2056-16-0x000000001F180000-0x000000001F6A8000-memory.dmp

                              Filesize

                              5.2MB

                            • memory/2056-15-0x000000001BB10000-0x000000001BB4C000-memory.dmp

                              Filesize

                              240KB

                            • memory/2056-11-0x000000001CBA0000-0x000000001CC52000-memory.dmp

                              Filesize

                              712KB

                            • memory/2056-10-0x0000000002EF0000-0x0000000002F40000-memory.dmp

                              Filesize

                              320KB