Analysis

  • max time kernel
    49s
  • max time network
    49s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    01-12-2024 18:34

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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 27 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:4704
  • 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:2332
    • 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:3188
    • 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:1244
      • 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:1628
  • 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:3420
    • 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,0x7ff986f8cc40,0x7ff986f8cc4c,0x7ff986f8cc58
      2⤵
        PID:3104
      • 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=1956,i,1212668739062400225,7028774060880726792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1952 /prefetch:2
        2⤵
          PID:4756
        • 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=2192,i,1212668739062400225,7028774060880726792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2204 /prefetch:3
          2⤵
            PID:1796
          • 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=2284,i,1212668739062400225,7028774060880726792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2508 /prefetch:8
            2⤵
              PID:4856
            • 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,1212668739062400225,7028774060880726792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3196 /prefetch:1
              2⤵
                PID:2216
              • 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=3200,i,1212668739062400225,7028774060880726792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3236 /prefetch:1
                2⤵
                  PID:4200
                • 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=4632,i,1212668739062400225,7028774060880726792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4592 /prefetch:1
                  2⤵
                    PID:4248
                  • 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=4452,i,1212668739062400225,7028774060880726792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4912 /prefetch:8
                    2⤵
                      PID:2168
                    • 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=4940,i,1212668739062400225,7028774060880726792,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4912 /prefetch:8
                      2⤵
                        PID:1304
                    • 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:4388
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                        1⤵
                          PID:1296

                        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

                          225c647b6b5b8fd753ccf62b813f14fc

                          SHA1

                          48b9e7a1bd9465ef8bb2ac4b044567d78c0a11ee

                          SHA256

                          6e8a750dc3f628d9314b7cc111b1f9a89dd72c7fbd721d674363cb5d76735e8c

                          SHA512

                          e12136afcbad6fbae3eb90350b86279576734e836c3aa48234e23d9fe155bd978ec973c22495e0884f3311fed9ceacb42e52042781503d4293ab256e1c2ec856

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

                          Filesize

                          2KB

                          MD5

                          f8f3e6dbdecfa1d5832cf56c0c6749d9

                          SHA1

                          257ce9b3a4b18950afc6644b9f11bbce8effe8f0

                          SHA256

                          a7a5c9d8c9cf1cb4d1088de84fc15eaab18784e5d174c16e2eac60a663f32e1f

                          SHA512

                          3b00bdabf86fee6bcb113eadeb855da222db330fb477d8d43d101670731aeece6a2fe9b7e48ca9b8662fe6d98fe87825930837e83c561b2bb8e887b0633c3b06

                        • 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

                          085f830d3df9528887a0db4d62afcee1

                          SHA1

                          a43eae2e63484d5d31d41953b2ee71b69aaa32cd

                          SHA256

                          2903c9d2488c58e7de4987c52d2f775986790f9fdae3817681e16d2b5807d75d

                          SHA512

                          111d9cd8f9539c7c59167b39e38789b3d7452e85433a30153837f57c35296adc0cfa8cc84ba7b013b6fa8b673622af24a09aed285df68dad0eee7ab276dc54fa

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

                          Filesize

                          9KB

                          MD5

                          6e91a31ebae9db082eecfc92f0060829

                          SHA1

                          5ba5aac9baf92392dfe7cafbaec190e6a8e48d99

                          SHA256

                          f56e3b1132d5e504eebb6cb3f2531219cb84f889813f91e762d918914e6ff1f8

                          SHA512

                          f208fde5f38f06999759ac0f42eddcc397dc31fb43defe0cd8ac8fc9830005a95a9c275e159afb7bef6c8bdb11f5d64f1841b5463190aaba38ea933c7e9a47d5

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

                          Filesize

                          236KB

                          MD5

                          23b72350354b515594d6bf4331d6ecce

                          SHA1

                          e721db0dfa40af8eeb42ad0b0c98fd8c5d47f7e2

                          SHA256

                          b75fb923156b56ca64c9ee90856029c81267b0a5032244db4671f3f712625fba

                          SHA512

                          2e787f1e4df06c0b9f9d68e80fcebcf8336163556a57a100e4b46f12d95109e7ba4f5b56d6f0f65ab0f6f681397332e553fd41852b6eb924573b1ec1a09641d5

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

                          Filesize

                          3.1MB

                          MD5

                          73565f33ed4d8741291cbb30409f1727

                          SHA1

                          4d3a54b28f3ea80f884a25905e27165bdc353109

                          SHA256

                          aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                          SHA512

                          d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                        • memory/1244-15-0x000000001D550000-0x000000001D58C000-memory.dmp

                          Filesize

                          240KB

                        • memory/1244-14-0x000000001C9C0000-0x000000001C9D2000-memory.dmp

                          Filesize

                          72KB

                        • memory/1244-11-0x000000001CA10000-0x000000001CAC2000-memory.dmp

                          Filesize

                          712KB

                        • memory/1244-10-0x000000001C900000-0x000000001C950000-memory.dmp

                          Filesize

                          320KB

                        • memory/2332-9-0x00007FF98CBB0000-0x00007FF98D672000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2332-6-0x00007FF98CBB0000-0x00007FF98D672000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2332-5-0x0000000000550000-0x0000000000874000-memory.dmp

                          Filesize

                          3.1MB

                        • memory/2332-4-0x00007FF98CBB3000-0x00007FF98CBB5000-memory.dmp

                          Filesize

                          8KB