Analysis

  • max time kernel
    50s
  • max time network
    50s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    17-11-2024 21:54

General

  • Target

    PORQUEPUTASYANOSIRVE.exe

  • Size

    3.1MB

  • MD5

    73565f33ed4d8741291cbb30409f1727

  • SHA1

    4d3a54b28f3ea80f884a25905e27165bdc353109

  • SHA256

    aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

  • SHA512

    d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

  • SSDEEP

    49152:uvyI22SsaNYfdPBldt698dBcjHdtRJ6CbR3LoGd7THHB72eh2NT:uvf22SsaNYfdPBldt6+dBcjHdtRJ68

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 1 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 22 IoCs
  • Suspicious use of FindShellTrayWindow 26 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:\Users\Admin\AppData\Local\Temp\PORQUEPUTASYANOSIRVE.exe
    "C:\Users\Admin\AppData\Local\Temp\PORQUEPUTASYANOSIRVE.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2632
    • 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:2456
    • 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:928
      • 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:4056
  • 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:3096
    • 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,0x7ffde074cc40,0x7ffde074cc4c,0x7ffde074cc58
      2⤵
        PID:2124
      • 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=1972,i,9269171973571224931,9021536995345218782,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1968 /prefetch:2
        2⤵
          PID:4132
        • 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=2228,i,9269171973571224931,9021536995345218782,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2232 /prefetch:3
          2⤵
            PID:2504
          • 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=2304,i,9269171973571224931,9021536995345218782,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2276 /prefetch:8
            2⤵
              PID:4936
            • 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,9269171973571224931,9021536995345218782,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3180 /prefetch:1
              2⤵
                PID:244
              • 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=3184,i,9269171973571224931,9021536995345218782,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3220 /prefetch:1
                2⤵
                  PID:4016
                • 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=4572,i,9269171973571224931,9021536995345218782,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3684 /prefetch:1
                  2⤵
                    PID:420
                  • 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=4800,i,9269171973571224931,9021536995345218782,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4812 /prefetch:8
                    2⤵
                      PID:4220
                    • 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=4816,i,9269171973571224931,9021536995345218782,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4836 /prefetch:8
                      2⤵
                        PID:640
                    • 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:1264
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                        1⤵
                          PID:1920

                        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

                          69ac811c08e40e8cc9a5823df3273cfd

                          SHA1

                          cd6cd3ad91b17342f3cb97c2e026bab743ffd606

                          SHA256

                          9073c8987d1d84635ed0c580fef15e719f9c3ae308c907f8ddeea121d707f6ea

                          SHA512

                          46ff8cbf35f43e21348b789712862147cefc219dde3a963c19ee49d3fac62415516f5c429c77d102e81e6f18995f92cc9f8cc42d91c42337f1949b0694cbf486

                        • 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\Preferences

                          Filesize

                          8KB

                          MD5

                          fc53a23a11bffa0f17a2337bfa2dde05

                          SHA1

                          a1adf322fe5afdacb3b0b477b4163ed678de783a

                          SHA256

                          54974d796b9a5aa5aa9df2a7a65c42152db60bde3724c557ab321b25f7a72327

                          SHA512

                          b1bc94a1e1f62346382bff422bf1872e288507337a1ed590f630f0894f88452ac764ebec3f38b38f9f7935c09e7df9f7561818d24c90f862d1ce50499ef9b812

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

                          Filesize

                          235KB

                          MD5

                          c90fd29cbcb414270615aac0f2b9c0ac

                          SHA1

                          dac3a9e4e12cb60f008157316f00ef8ac6cf46a7

                          SHA256

                          760f5c9487ffbe611256ad36c34df320e21f3214b9626425b05960bee3313d5c

                          SHA512

                          9d325fd79609cac4fce84e4147cd31a25984f9138759fb571bca4f2d50074bf395a1b28eae4e0b2ab30367a96590f66cd652356bd9d8da188a9c3cba47804778

                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

                          Filesize

                          3.1MB

                          MD5

                          73565f33ed4d8741291cbb30409f1727

                          SHA1

                          4d3a54b28f3ea80f884a25905e27165bdc353109

                          SHA256

                          aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                          SHA512

                          d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                        • \??\pipe\crashpad_3096_KGUXJKCHONQYNXJM

                          MD5

                          d41d8cd98f00b204e9800998ecf8427e

                          SHA1

                          da39a3ee5e6b4b0d3255bfef95601890afd80709

                          SHA256

                          e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                          SHA512

                          cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                        • memory/928-6-0x00007FFDEA9F0000-0x00007FFDEB4B2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/928-8-0x000000001EB20000-0x000000001EB70000-memory.dmp

                          Filesize

                          320KB

                        • memory/928-9-0x000000001EC30000-0x000000001ECE2000-memory.dmp

                          Filesize

                          712KB

                        • memory/928-12-0x000000001EB70000-0x000000001EB82000-memory.dmp

                          Filesize

                          72KB

                        • memory/928-13-0x000000001EBD0000-0x000000001EC0C000-memory.dmp

                          Filesize

                          240KB

                        • memory/928-14-0x00007FFDEA9F0000-0x00007FFDEB4B2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/928-7-0x00007FFDEA9F0000-0x00007FFDEB4B2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2632-5-0x00007FFDEA9F0000-0x00007FFDEB4B2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2632-0-0x00007FFDEA9F3000-0x00007FFDEA9F5000-memory.dmp

                          Filesize

                          8KB

                        • memory/2632-2-0x00007FFDEA9F0000-0x00007FFDEB4B2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2632-1-0x0000000000F50000-0x0000000001274000-memory.dmp

                          Filesize

                          3.1MB