Analysis

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

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    02-12-2024 20:40

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:3896
  • 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:1548
    • 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:404
    • 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:1836
      • 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:648
  • 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:4840
    • 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,0x7fff945fcc40,0x7fff945fcc4c,0x7fff945fcc58
      2⤵
        PID:4400
      • 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=2068,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2060 /prefetch:2
        2⤵
          PID:5068
        • 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=1912,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1824 /prefetch:3
          2⤵
            PID:1768
          • 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=2264,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2228 /prefetch:8
            2⤵
              PID:3152
            • 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=3160,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3180 /prefetch:1
              2⤵
                PID:5044
              • 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=3204,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3224 /prefetch:1
                2⤵
                  PID:492
                • 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=4536,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4544 /prefetch:1
                  2⤵
                    PID:3472
                  • 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=4824,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4856 /prefetch:8
                    2⤵
                      PID:4488
                    • 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=5024,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5036 /prefetch:8
                      2⤵
                        PID:4428
                      • 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=4404,i,8504090880026914605,2350093759276322792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5288 /prefetch:1
                        2⤵
                          PID:1216
                      • 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:1928
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                          1⤵
                            PID:4080

                          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

                            c1bf890916bf25cb00afb53ee8e22310

                            SHA1

                            fcdb63855e983dce7c9d7dbcc7f505e28cb426b6

                            SHA256

                            1211840780559a857d5665432a886e9b17c3fe02e9fbc4cc365da54dcdfd2021

                            SHA512

                            a162e36d3f61d6bd23f5adfe9c6e7425eee6da7fb3fec3ba54b992a5602a9e281b22ca5264e5584e3ac239a5548482e3e6526b0c33b348fa512077f5fe26ef93

                          • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_000005

                            Filesize

                            215KB

                            MD5

                            2be38925751dc3580e84c3af3a87f98d

                            SHA1

                            8a390d24e6588bef5da1d3db713784c11ca58921

                            SHA256

                            1412046f2516b688d644ff26b6c7ef2275b6c8f132eb809bd32e118208a4ec1b

                            SHA512

                            1341ffc84f16c1247eb0e9baacd26a70c6b9ee904bc2861e55b092263613c0f09072efd174b3e649a347ef3192ae92d7807cc4f5782f8fd07389703d75c4c4e2

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

                            Filesize

                            192B

                            MD5

                            d2be25441c9cf9d6f4aaa63c3ec8ffee

                            SHA1

                            cda5cc990badd6ad5e28f1493151e3833e0d7c8a

                            SHA256

                            5e756e61ad1ccb4a2af0dec304207497212b0c010f1a0744b1c6f1bfcedb5d33

                            SHA512

                            c0cf45b079aacc4962d4dc173c1b7bb7b1b1dfadda8cf17bcd6f71899e700805faa7e3b4de49bf0ec736320ed118f85b040d247b53b94cb82a78ad5c01db066c

                          • 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

                            2998c3c735cc9508e06d38951dc025f2

                            SHA1

                            f1e8f0a420bbc6f3efbb44a6f55a783e11afbbe5

                            SHA256

                            3c2ee438fc574783c8ac7e086d5be230d02e893387a224cd6191fad0eab16022

                            SHA512

                            a6da04aac4f9267758a596341bedc6ae11c4644f667cee25e76648270e41d50c5f36b3ca96137e02dd9912a1cd6e604b81cfac6193f826f66ee5aa6a882aaa72

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

                            Filesize

                            356B

                            MD5

                            4aab8cdd32ed2a3a64b02c69c9612fe0

                            SHA1

                            e7847b5596095fd59b16f306938dfc5d5d783b32

                            SHA256

                            4e9dbd9ff88741fbe8eceeac28731418090a2dac73eeed5edbc45ddc5aec4391

                            SHA512

                            2d1a87d5fdf56a88a9b80f2dc13b3b8fb5124a37ffa0c94d2b9ed928931a68e6609243a9b54ab38b8ffb420cc8e8c82faab1dbf606499a54b5608417f5c71cdb

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

                            Filesize

                            9KB

                            MD5

                            45349129e819f4b7a71f85740f313ec3

                            SHA1

                            fe1a1a4a7a241842a6cfe51f8f9e6493315b04e8

                            SHA256

                            75e987f2a0fb4e898fdcfbe8b8644eb6f69e957332bc5fd4fd2c6c20eb2167ff

                            SHA512

                            1b42c1799626daf9920a6672fae0d8649894807f76d55f5e404811ee0d6ad03aac9b2e725fb6c6bc6c9314cab8c077ab2bba527e3d65244b2bdd811129eafa98

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

                            Filesize

                            9KB

                            MD5

                            b1d9c5c5dca1e487883f601519b53f72

                            SHA1

                            2d60c403f3e47e0fc27c95403dd4cbeffd41b4fd

                            SHA256

                            a65b3eb7677254c7fffdab24183b76dc048f32fd3df9a9d81200a6f48cfe683b

                            SHA512

                            b7ac40fc2d69015bc8f5b33f83d0db00db7e20583df516e8c3ab065fb8beca388e436e84b5965470f50d42dea1218361795384cbd314ef780a1bcf762f4203bb

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

                            Filesize

                            15KB

                            MD5

                            2d7fdd05bc2dd9ee4a1bcebf968e599d

                            SHA1

                            7c949ffceeaea986059cc83cb1b363602b7faa62

                            SHA256

                            acb6fd4885738ef81cdb2cf6adc2bf122799b7b0a459a70a572b94ceb25b1ad8

                            SHA512

                            4c6ed97a8761cb7aa89c7c06dc49a40104fee486dd9d34c549925ca8bddb8132adbfb9207166124e10fa1e3d4c89458448bceb229c4f08f7c7e331baa5f6d635

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

                            Filesize

                            236KB

                            MD5

                            384c4f6d424d40de6575acbd5e1abffc

                            SHA1

                            cdee0538e444d1f238c2d31f4073f7fc53925973

                            SHA256

                            13cc9a46ebffb233f8de029c6645b203ad8bfe92aab94021dc336da57c5264e1

                            SHA512

                            417cd27ea52767f9ef33f907843cf644848aa938d8e19283f8d36fb7d07f3a11f3220d7eee4b712888408cbb6404757e585d1c6333ffc1e690aaf187b3e71954

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

                            Filesize

                            236KB

                            MD5

                            d23905e4ed1e2bad21aa61358160db17

                            SHA1

                            4d3418fc4ff5bc80d6524a926b03164a84d359eb

                            SHA256

                            d1dee8c485074fa2740f2eea182f9254156e1f8f12102ad3708ea166123419a6

                            SHA512

                            36e96b2ebc7e543f874978cd2cb8639def9f1284f432c4a20fbb2575a9f1ecda1635f5c6420d89f996f2ac77473abedbeb94ab11473134673713feed02b6750b

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

                            Filesize

                            3.1MB

                            MD5

                            73565f33ed4d8741291cbb30409f1727

                            SHA1

                            4d3a54b28f3ea80f884a25905e27165bdc353109

                            SHA256

                            aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                            SHA512

                            d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                          • \??\pipe\crashpad_4840_JFZLAXEGFUEIIUAV

                            MD5

                            d41d8cd98f00b204e9800998ecf8427e

                            SHA1

                            da39a3ee5e6b4b0d3255bfef95601890afd80709

                            SHA256

                            e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                            SHA512

                            cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                          • memory/1548-6-0x00007FFF9A620000-0x00007FFF9B0E2000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/1548-9-0x00007FFF9A620000-0x00007FFF9B0E2000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/1548-5-0x0000000000AF0000-0x0000000000E14000-memory.dmp

                            Filesize

                            3.1MB

                          • memory/1548-4-0x00007FFF9A623000-0x00007FFF9A625000-memory.dmp

                            Filesize

                            8KB

                          • memory/1836-10-0x0000000002AC0000-0x0000000002B10000-memory.dmp

                            Filesize

                            320KB

                          • memory/1836-58-0x000000001E220000-0x000000001E748000-memory.dmp

                            Filesize

                            5.2MB

                          • memory/1836-15-0x000000001B5D0000-0x000000001B60C000-memory.dmp

                            Filesize

                            240KB

                          • memory/1836-14-0x000000001B440000-0x000000001B452000-memory.dmp

                            Filesize

                            72KB

                          • memory/1836-11-0x000000001C970000-0x000000001CA22000-memory.dmp

                            Filesize

                            712KB