Analysis

  • max time kernel
    92s
  • max time network
    93s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    25-11-2024 04:14

General

  • Target

    PORQUEPUTASYANOSIRVE.7z

  • Size

    923KB

  • MD5

    d757d40193d311216967491e36fc2ba4

  • SHA1

    2dd90fa74c489da4f85bdf301053230b480a31fa

  • SHA256

    8a31693ddf8924f144ba19a8802766188bd13f1ed7eea7c226eb0e01a9e47685

  • SHA512

    9be26ab222457605eea0c42a4dbcfa80154cb384e6abf0db6a010fcca172a0eda8792b9e3fff9d67717f095f67448d9310c7e049f7fea8dd5907afe8bd462921

  • SSDEEP

    24576:q9gl2kNvEE7GFdGqXsShFTAkBojKLUI56eGk:46vbIGqXscAkW+h1

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

azxq0ap.localto.net:3425

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: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 28 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\PORQUEPUTASYANOSIRVE.7z"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:1984
  • C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe
    "C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1324
    • 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:3712
    • 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:4864
      • 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:5040
  • 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:1996
    • 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,0x7fff7f96cc40,0x7fff7f96cc4c,0x7fff7f96cc58
      2⤵
        PID:1676
      • 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=2060,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2056 /prefetch:2
        2⤵
          PID:1388
        • 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=1968,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2092 /prefetch:3
          2⤵
            PID:1608
          • 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=2308,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2492 /prefetch:8
            2⤵
              PID:4196
            • 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=3184,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3196 /prefetch:1
              2⤵
                PID:960
              • 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=3220,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3240 /prefetch:1
                2⤵
                  PID:4340
                • 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=4604,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4596 /prefetch:1
                  2⤵
                    PID:4284
                  • 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=4836,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4864 /prefetch:8
                    2⤵
                      PID:4316
                    • 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=4976,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4868 /prefetch:8
                      2⤵
                        PID:1920
                      • 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=10 --field-trial-handle=4864,i,7163971845067266759,2050119582826173760,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4100 /prefetch:1
                        2⤵
                          PID:3280
                      • 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:408
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                          1⤵
                            PID:5012

                          Network

                          MITRE ATT&CK Enterprise v15

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

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

                            Filesize

                            649B

                            MD5

                            3286608608e5b7ee76f94c5b6776b3c9

                            SHA1

                            2c0009c3fecdb7640311e81db276cb799d49296b

                            SHA256

                            c3ca99ae135dc04e6867304d819e2e27884741b4e48f9b272391fbd26d151d43

                            SHA512

                            2295b6a939d89bab24ab43464b039a1e313dc5c032a6bb91fcfa159fb470b3bc90f4701033f7299a185c8cae12e1ecb1c9d56956376e81e96776fbf52358d6c0

                          • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Code Cache\js\index-dir\the-real-index

                            Filesize

                            312B

                            MD5

                            d2579c7db76fc5c56f5e60a2aa0a0536

                            SHA1

                            ea46c4951cfec0ca1262d6265487c65c6287f38f

                            SHA256

                            b29e39d0497608a9f7349c713d786cfb4f18c4001652d883ad40bb7ee670224f

                            SHA512

                            b4648b44d5dfaf629bf6ce3b8d727f13c6cf5370d26bf1e1e59f43756d017261142b74bb4e693be7c3d62b42195a78d9f2f4927b29ecd5619b59b12398c3b744

                          • 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

                            4418c357dfdeb0513ed06521eb953727

                            SHA1

                            40e1d94b4f1eb1bfa9cdf6eb98c57bcc5e904c05

                            SHA256

                            140c1cce4505b63aad9df644f8d8d87f1eeaba03791cb4e104d9f02db457fd09

                            SHA512

                            f7afc01571124c834332c18bd7075312268603e9569ed449293d5d3430393b5b6efcdd2a2f7eedb2aded568777bcbb8d62d7379d6fd99126356f249dc4eca8d8

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

                            Filesize

                            356B

                            MD5

                            349eb3da5fff49ca2647aba98088819f

                            SHA1

                            6fbd8ae4a8bb7344a785b921d1012d4b537014be

                            SHA256

                            bd1433622356629b009fa6840f0e670829fd68ea128958021b9f3748653d8221

                            SHA512

                            6cec1abc887009a27105bb467776f99a75b8c3c14e4444c1beefa109c4015209bc78bbe17fc3da369649316db9c6155c78cd221dc250f2f1cd5b353296a7382a

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

                            Filesize

                            9KB

                            MD5

                            536a44ee8d19d246dd778fba65eee966

                            SHA1

                            a225479d7480953890b73c785f88cbeb72a9cca6

                            SHA256

                            d46b954ab9668779f7164d20a6888abd549536936eb02ba30c3182eb57283bee

                            SHA512

                            686c2dafe7e2336b3876e2ac30ea3fda3ae4ee142c54b3fedc9f345f23ee230763866333fc4e0b2e3fd66635c9a58cf3c5532ec42987e5d7df824797623ac547

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

                            Filesize

                            9KB

                            MD5

                            659d32ac3285a6884d394b6f934d1c82

                            SHA1

                            6e18fdc833bdc0601c993df159c6b61108960ce7

                            SHA256

                            408168b713b00ab85c9e1ccbdfea1e4f8a54ed38179e09cf3175e7129c7e01c2

                            SHA512

                            07e62077a64b35b0ccf2342d00cf05ec997c82d7ef5d4e157225574fd986fb52f44c1b97e0f3377b18c26defb7bd62d5bbbd8cfe3d2a71c7fbb339508361264c

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

                            Filesize

                            9KB

                            MD5

                            79e2747283898aa8ef28537bfe797fb7

                            SHA1

                            7b302958a791add3ecff845bd9487cf05c4cc05c

                            SHA256

                            775044ba92aaa0d4ffb0489fe5fe67b5b36f966b4b81408daa1f00642ceedcd5

                            SHA512

                            73a0e7f505807b13c260d26736cd272e20d36e29d895241d9d20a5b803fc162dbb951233b53397034b5c75c3a8a7c76cb460928b4a52ccab883761d7251a5899

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

                            Filesize

                            15KB

                            MD5

                            43f1d0ec61cab2a68e5a78de975a6caf

                            SHA1

                            8cf7acd4aad767db9c7b7b2f6a1fcae824d67745

                            SHA256

                            7f7f92cd993887c3b83551c45c73dc69d65679509f4c8acc3ce2befd82f4ee9e

                            SHA512

                            301a1ae90e690229e83dcbc45157c7c238b4a5973701df0d029de75c6122b54a57a925e3c13f213bf55777a236761017b05461daa845664702458259c2ae3200

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

                            Filesize

                            236KB

                            MD5

                            00ae12eac7e0ae3636905bd7554e8ed2

                            SHA1

                            27a83bb9b8edfda90f3bf0432044ba42c707344f

                            SHA256

                            5784a594b23dbc1d05f23efc73451cf6580ce88da1fae4b50275162a26e6f029

                            SHA512

                            9c152fe506617481dbffd6dd6a78d349eca35aa7e585837f71b366427e45d47bc791e9a4665a3e9bd2e9f59b078dc4a9ac4abbc35006391060a09a6a6376a193

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

                            Filesize

                            236KB

                            MD5

                            9563beabeea0f3b9c8838087de434bf2

                            SHA1

                            e4bd8e237556857ce459eadb85a6170f9724c9dd

                            SHA256

                            a8d03db3c3899bd9803437cb417bf571dd8e9b53094e46f3e9d77e76ee6a8f7a

                            SHA512

                            f276c1724cb1a4517575f4ace52197105dc0db1bf11a57ab2bb6210c1608688e558c16ca9d98369326539ad73501d8acb030e7cdf2337f4a5e91b4cb0e5f150e

                          • C:\Users\Admin\Desktop\PORQUEPUTASYANOSIRVE.exe

                            Filesize

                            3.1MB

                            MD5

                            73565f33ed4d8741291cbb30409f1727

                            SHA1

                            4d3a54b28f3ea80f884a25905e27165bdc353109

                            SHA256

                            aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                            SHA512

                            d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                          • \??\pipe\crashpad_1996_BBGKJZZDWOFUCXPF

                            MD5

                            d41d8cd98f00b204e9800998ecf8427e

                            SHA1

                            da39a3ee5e6b4b0d3255bfef95601890afd80709

                            SHA256

                            e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                            SHA512

                            cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                          • memory/1324-5-0x0000000000260000-0x0000000000584000-memory.dmp

                            Filesize

                            3.1MB

                          • memory/1324-9-0x00007FFF851E0000-0x00007FFF85CA2000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/1324-6-0x00007FFF851E0000-0x00007FFF85CA2000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/1324-4-0x00007FFF851E3000-0x00007FFF851E5000-memory.dmp

                            Filesize

                            8KB

                          • memory/4864-40-0x000000001E7F0000-0x000000001ED18000-memory.dmp

                            Filesize

                            5.2MB

                          • memory/4864-15-0x000000001D0B0000-0x000000001D0EC000-memory.dmp

                            Filesize

                            240KB

                          • memory/4864-14-0x000000001C040000-0x000000001C052000-memory.dmp

                            Filesize

                            72KB

                          • memory/4864-11-0x000000001D130000-0x000000001D1E2000-memory.dmp

                            Filesize

                            712KB

                          • memory/4864-10-0x000000001BE90000-0x000000001BEE0000-memory.dmp

                            Filesize

                            320KB