Analysis

  • max time kernel
    54s
  • max time network
    55s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    23-11-2024 17:42

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: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 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 behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:1004
  • 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:1756
    • 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:4064
    • 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:1640
      • 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:4544
  • 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:828
    • 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,0x7ffe95dccc40,0x7ffe95dccc4c,0x7ffe95dccc58
      2⤵
        PID:1628
      • 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=2036,i,1689911938516833697,2372306160851381689,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2032 /prefetch:2
        2⤵
          PID:788
        • 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=1868,i,1689911938516833697,2372306160851381689,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2172 /prefetch:3
          2⤵
            PID:1344
          • 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=2272,i,1689911938516833697,2372306160851381689,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2488 /prefetch:8
            2⤵
              PID:2992
            • 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=3152,i,1689911938516833697,2372306160851381689,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3168 /prefetch:1
              2⤵
                PID:1744
              • 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=3176,i,1689911938516833697,2372306160851381689,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3336 /prefetch:1
                2⤵
                  PID:1816
                • 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=4600,i,1689911938516833697,2372306160851381689,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4584 /prefetch:1
                  2⤵
                    PID:3348
                  • 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=4840,i,1689911938516833697,2372306160851381689,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4852 /prefetch:8
                    2⤵
                      PID:3648
                    • 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=4992,i,1689911938516833697,2372306160851381689,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5044 /prefetch:8
                      2⤵
                        PID:2592
                    • 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:2128
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                        1⤵
                          PID:4368

                        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

                          f03a88fdb1f5065db2a26e34f9689259

                          SHA1

                          9dcac29afc751328b2b074c26369cf3e62e0c90e

                          SHA256

                          5d1bd09e193eaef6bb9e176d1d91d800a4264fe7e15a9ce8e0fc4615f1d3aa89

                          SHA512

                          5a7d34af5d9901fc085cbec78fc8d65b31fb1d9396d13b51c089d4ec060354984c120e64ebdcac04063fb30ebc99eeaa4a83fc14dfcd6fb6fb9c04cd71d79b3c

                        • 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

                          b7fce2efaa0a4abfad8a84f019d1fa9a

                          SHA1

                          c70f60b3f015014893b3fdb864c6f873c0da330e

                          SHA256

                          bece1c6fcf2e764f596bcdc1e2a66f5e2a89641cee9cf99c62c06447b9cf5b1a

                          SHA512

                          af73a1efc5f3b8e6da38eeb3127d2ec5e7d3edda6421fab468b258dd9005df506121c35145b5347adabae603b230e6cbe427fdda184f6916891b1b8826691d05

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

                          Filesize

                          9KB

                          MD5

                          2795644f804337ea3a4d0216e07d346b

                          SHA1

                          1a15e9fbe27ff2888a8de442d2126e7244f5eae7

                          SHA256

                          48601386d62e85ce0cc43211643247b02bf68c8263cd0ee11bbdecedbfaec05a

                          SHA512

                          80bf5d050d1a72f0dbc77ed945409cc65459ff75d1ebb26a8ea1ed9c29a857b5644f7c5e7a57023e33068b8f2e421546a278d82287a4738388078aa4f94130da

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

                          Filesize

                          236KB

                          MD5

                          f54804bd8d1689458ae79a6d7d3d4c7b

                          SHA1

                          47b7bb8b66baa215d663fbdb8c9b90b818a45660

                          SHA256

                          d891dcc07aad7121761deeecd84933910a8ccf797c1d33d62f6ff810d483dee2

                          SHA512

                          3835f4d5911d5698b5c0587ae1d859ac99d94320a7603e78d533c9717abc9600c089ecadb4d983240875d5bcd03b1366a82ae65c558ff86fa053f4a094a23f79

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

                          Filesize

                          3.1MB

                          MD5

                          73565f33ed4d8741291cbb30409f1727

                          SHA1

                          4d3a54b28f3ea80f884a25905e27165bdc353109

                          SHA256

                          aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                          SHA512

                          d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                        • \??\pipe\crashpad_828_ACMQKRHCJOJCVUSV

                          MD5

                          d41d8cd98f00b204e9800998ecf8427e

                          SHA1

                          da39a3ee5e6b4b0d3255bfef95601890afd80709

                          SHA256

                          e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                          SHA512

                          cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                        • memory/1640-11-0x000000001CC90000-0x000000001CD42000-memory.dmp

                          Filesize

                          712KB

                        • memory/1640-15-0x000000001D8D0000-0x000000001D90C000-memory.dmp

                          Filesize

                          240KB

                        • memory/1640-14-0x000000001CC40000-0x000000001CC52000-memory.dmp

                          Filesize

                          72KB

                        • memory/1640-10-0x000000001CB80000-0x000000001CBD0000-memory.dmp

                          Filesize

                          320KB

                        • memory/1756-9-0x00007FFE9B520000-0x00007FFE9BFE2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/1756-6-0x00007FFE9B520000-0x00007FFE9BFE2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/1756-5-0x0000000000210000-0x0000000000534000-memory.dmp

                          Filesize

                          3.1MB

                        • memory/1756-4-0x00007FFE9B523000-0x00007FFE9B525000-memory.dmp

                          Filesize

                          8KB