Analysis

  • max time kernel
    241s
  • max time network
    249s
  • 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 21:30

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 23 IoCs
  • Suspicious use of FindShellTrayWindow 29 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:4920
  • 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:216
    • 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:1552
    • 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:3172
      • 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:3908
  • 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:3224
    • 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,0x7fffcbb4cc40,0x7fffcbb4cc4c,0x7fffcbb4cc58
      2⤵
        PID:4212
      • 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=1948,i,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1944 /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=2184,i,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2220 /prefetch:3
          2⤵
            PID:620
          • 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=2292,i,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2212 /prefetch:8
            2⤵
              PID:4592
            • 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,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3192 /prefetch:1
              2⤵
                PID:1924
              • 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,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3224 /prefetch:1
                2⤵
                  PID:4648
                • 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,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3724 /prefetch:1
                  2⤵
                    PID:2692
                  • 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=4828,i,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4836 /prefetch:8
                    2⤵
                      PID:1012
                    • 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=5056,i,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5068 /prefetch:8
                      2⤵
                        PID:1664
                      • 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=4484,i,9072719611991280403,675698471451279753,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5100 /prefetch:1
                        2⤵
                          PID:3756
                      • 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:3132
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                          1⤵
                            PID:2152

                          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

                            5355d007b93f7fe7e81deb8537a25e13

                            SHA1

                            89ecb5b31180acbe00b1d60017b28946a9f6d0b1

                            SHA256

                            00d2d4baa49fb014e7b16dfc9be6ab7f3e8802af987ed473b45a558e0bcb95d3

                            SHA512

                            3139a23929d61b02422fa41b33bd5b1398a3a659588171e677a5139b0e55659ef92800764c4d5a425010bb5480173dcb46e7f4bc3b86b931228701d9b134e13e

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

                            Filesize

                            215KB

                            MD5

                            e579aca9a74ae76669750d8879e16bf3

                            SHA1

                            0b8f462b46ec2b2dbaa728bea79d611411bae752

                            SHA256

                            6e51c7866705bf0098febfaf05cf4652f96e69ac806c837bfb1199b6e21e6aaf

                            SHA512

                            df22f1dff74631bc14433499d1f61609de71e425410067fd08ec193d100b70d98672228906081c309a06bcba03c097ace885240a3ce71e0da4fdb8a022fc9640

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

                            Filesize

                            192B

                            MD5

                            3c73ef073d57a18dc63d461d37046c1b

                            SHA1

                            2f1a8b8d949dda2f62ca64247f4ecf8b9d689422

                            SHA256

                            64f79fa4a0cff52bb4e4ce1424f1c66bec1d64ce24e7e580f1130681b3254f47

                            SHA512

                            6f121812e3e5a1ecfa391803c15dbe31c29a2e0fabbc24671943d981e371cbfbafc6a223749eb11db0c75348a47b21fc04193fdcc1cb4e1aeedf47a76bf28566

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

                            Filesize

                            3KB

                            MD5

                            7ee3a10d4c30b44f5673e888c373e25c

                            SHA1

                            24ae99e6e0587f3e851a6e1ab3ea43265cb4bcd6

                            SHA256

                            aafac10cb0aa0026fc846463923e431c78860d02b741ce72e8fe3384e131c4d4

                            SHA512

                            be2c32b615e8e812c248c9009b5cdf91774aecd5d97215666cc5d589398b11e71ba657eb9bfbb2313763367ab20fc5cb1abb348f4398bf9bce8cbf0e31ba5d63

                          • 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

                            c28962d0ef6def5507cbafc0cb5e0958

                            SHA1

                            22f01cc9dfd313df713293f1a230f1aa684e5a8e

                            SHA256

                            687229181ab3e95dc0dbfe75f2e2469f1017fced076fb1e6836ce46a1f1d00d6

                            SHA512

                            16309d6d17259650aed19e26ac7923bb39d0f40977e0ade069cd57a544f9cf84819d72bba3b2f59d543bdef602a81df584aa848fefd9ab022cecaad588fb8df5

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

                            Filesize

                            9KB

                            MD5

                            5d6495e5e252507821e987e18bd22046

                            SHA1

                            b38b7c1933e5ad9ac5454142001fe3be00cb4a40

                            SHA256

                            2c4dca18064a52dc5827acbf9f6e2c6c707cdf62e9a2912e67dc8c416460c593

                            SHA512

                            0fe9da84442cf4f8d54d968154269affd77f34ce66b87c9f62fb649cfa1505d405976f8e0d20f060a441785091245b62add87df238b02194d9748e4980aaa84d

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

                            Filesize

                            15KB

                            MD5

                            ade1c8537dde674eb2993efa67340f33

                            SHA1

                            2e61c8240dbd1e90a6f933700a59e903d4243e90

                            SHA256

                            a0892aa4b6e777e2991a5065f2aac57db19ab1deba2158b460c7d2f30aee3648

                            SHA512

                            f64cb0efab172bd26cb3d4bc1c867f5377580d0eaa4f021d020d33d9025232df865c37a133fd46d11dfb05ba959ea271764958a7c80ad5c446370fe525f0e12b

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

                            Filesize

                            235KB

                            MD5

                            9b8ab8a26f4e0f927116958cabf4dff6

                            SHA1

                            5efde3d9de9ca02bbf0055fafb52b120bbd92e8b

                            SHA256

                            df8bed4a3c32fbffa1ddd58b344a47af698b944dbccf69400de471ec7ea85859

                            SHA512

                            5852e8334164368ec9e7c9ae45dab18c50602e6893a87411e024d71cfc0ba12818f59643a1b111843c29e1eac385c88d083fdf702ec33ac919f32023c326a29e

                          • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\ShaderCache\data_1

                            Filesize

                            264KB

                            MD5

                            f50f89a0a91564d0b8a211f8921aa7de

                            SHA1

                            112403a17dd69d5b9018b8cede023cb3b54eab7d

                            SHA256

                            b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                            SHA512

                            bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

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

                            Filesize

                            3.1MB

                            MD5

                            73565f33ed4d8741291cbb30409f1727

                            SHA1

                            4d3a54b28f3ea80f884a25905e27165bdc353109

                            SHA256

                            aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                            SHA512

                            d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                          • \??\pipe\crashpad_3224_SGNGCUQGRAMJKZYZ

                            MD5

                            d41d8cd98f00b204e9800998ecf8427e

                            SHA1

                            da39a3ee5e6b4b0d3255bfef95601890afd80709

                            SHA256

                            e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                            SHA512

                            cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                          • memory/216-6-0x00007FFFB24D0000-0x00007FFFB2F92000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/216-9-0x00007FFFB24D0000-0x00007FFFB2F92000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/216-5-0x0000000000C10000-0x0000000000F34000-memory.dmp

                            Filesize

                            3.1MB

                          • memory/216-4-0x00007FFFB24D3000-0x00007FFFB24D5000-memory.dmp

                            Filesize

                            8KB

                          • memory/3172-10-0x000000001B600000-0x000000001B650000-memory.dmp

                            Filesize

                            320KB

                          • memory/3172-44-0x000000001E4F0000-0x000000001EA18000-memory.dmp

                            Filesize

                            5.2MB

                          • memory/3172-15-0x000000001D360000-0x000000001D39C000-memory.dmp

                            Filesize

                            240KB

                          • memory/3172-14-0x000000001C6D0000-0x000000001C6E2000-memory.dmp

                            Filesize

                            72KB

                          • memory/3172-11-0x000000001C760000-0x000000001C812000-memory.dmp

                            Filesize

                            712KB