Analysis

  • max time kernel
    198s
  • max time network
    199s
  • 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 01:57

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 4 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:3224
  • 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:5104
    • 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:4116
    • 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:1976
      • 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:4160
  • 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:1556
    • 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=0x224,0x228,0x22c,0x200,0x230,0x7ffd7f94cc40,0x7ffd7f94cc4c,0x7ffd7f94cc58
      2⤵
        PID:4112
      • 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=2016,i,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2012 /prefetch:2
        2⤵
          PID:4640
        • 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=1924,i,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2208 /prefetch:3
          2⤵
            PID:4488
          • 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,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2464 /prefetch:8
            2⤵
              PID:4776
            • 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=3168,i,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3176 /prefetch:1
              2⤵
                PID:3848
              • 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=3196,i,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3312 /prefetch:1
                2⤵
                  PID:4752
                • 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=4540,i,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4584 /prefetch:1
                  2⤵
                    PID:1928
                  • 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=4700,i,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4896 /prefetch:8
                    2⤵
                      PID:3120
                    • 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=4768,i,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5072 /prefetch:8
                      2⤵
                        PID:4356
                      • C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\setup.exe
                        "C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\setup.exe" --reenable-autoupdates --system-level
                        2⤵
                        • Drops file in Windows directory
                        PID:528
                        • C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\setup.exe
                          "C:\Program Files\Google\Chrome\Application\123.0.6312.123\Installer\setup.exe" --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\SystemTemp\Crashpad --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=123.0.6312.123 --initial-client-data=0x298,0x29c,0x2a0,0x274,0x2a4,0x7ff7ffa54698,0x7ff7ffa546a4,0x7ff7ffa546b0
                          3⤵
                          • Drops file in Windows directory
                          PID:1164
                      • 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=4852,i,8564090336992190212,17593775205681710487,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4568 /prefetch:1
                        2⤵
                          PID:4504
                      • 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:1160
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                          1⤵
                            PID:4904

                          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

                            ae74aa4569d37a7247730da9291ce6ea

                            SHA1

                            285cbb427c196314f7acc6354be81178c3188672

                            SHA256

                            c99bd438d1fd3e17ceeb1a57aebe9c189c64283b2185b978ed6ad2b615e95c92

                            SHA512

                            8f021bbcf46a47d18f88c1a16b8250fd27f156297ff7c94d9d0238ee23793d26e3ec156b7a4a91df2c9e4f1d2efcf2a7f17b810b7d71a759652f922fb3bb61ed

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

                            Filesize

                            120B

                            MD5

                            0a6aab60eb93abbccd4b303bc0affaa1

                            SHA1

                            a1c4521d506f8e3a30fe0b6282abe2195ae99604

                            SHA256

                            1384568e6f6603dea31a47d91facb9101923ae4df746a049ff7288fb1df1eeea

                            SHA512

                            c34be4e4340a2799f1db2d4d9bc4b91f0f1d6fba0d644cc23c1793c950b8c72b77efeddc3c2575bbf54ae43e7d1de7c4aaa913ee3083143801c09176e985e827

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

                            Filesize

                            432B

                            MD5

                            56c2db0d02a05e580ddf4804d91bc19d

                            SHA1

                            a450b3ad4115cde63250cd3b245ec0bc8a110b1f

                            SHA256

                            efaac79a26451c291fa9d3782bb826bdd2fdd6f423eb9278467bf0ab1d2fc768

                            SHA512

                            8cd795f4a4f307473ed2c64204f470c1c84428bc2d321d32d6cff54ad87b8dd4fec05f10a960e88abcb46ae5964acf15f7c6b46336ea71112cbb2c9392644b50

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

                            Filesize

                            3KB

                            MD5

                            2c92b01e7ce8e53b2baefc574b7136f6

                            SHA1

                            c2e4265cbee2a7f80f850036ad52bea8853c7fe0

                            SHA256

                            d44ed8e6dc775467560b4f3fe3c7ecfd810bcfd53eedac1deb6b74a4de392d53

                            SHA512

                            583574c518c427175b4874042809702c28d6de05256862662edf03430ab11cd3e1ab6c00c2cf6bdc1e293aa03e716fc67d3b0e8b6e5d7dde1e807cf2e2a299fd

                          • 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

                            520B

                            MD5

                            85f86f89368845932c82641b3bbd48dd

                            SHA1

                            cc7bd65d6908b2f4b8e788490ea01d447f1482ef

                            SHA256

                            0f6384617049b151b77b6025373fa9533e56c6d8f4975f74edb2a37acbaaf94c

                            SHA512

                            fbe69a8acfd3ed7e3ad766d76380de4a15c5b673d78da60c4d1c366315030ca14856a743519846ea6c90e27b0aaf563545fc2d04868d8b6597e930edcd1dba23

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

                            Filesize

                            352B

                            MD5

                            f023015893d9471d4855dcf785067c84

                            SHA1

                            5f6ef86634ab8c52d5562b86ccf7a16ad35ec901

                            SHA256

                            433caf1adec2a447961f3b71aaa1acb99731b63b9270dabbcb4fdecb0c9db4d4

                            SHA512

                            cd2f730453f48c7f98322c0dd5d96efb7423c5ce5310459cc9cbf46a92034435f543db23b2c0629335c7daeecd59675b21924482f2c3bad0ce1c384d8bbbb7e2

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

                            Filesize

                            9KB

                            MD5

                            5286ae4fd6325a767fabc599e638ccd1

                            SHA1

                            0b6821f09c23f0401b45dc29c7f9e55afbb97024

                            SHA256

                            d10866cfa542acd852b04b8a12f3ba426537bacc9a95e1f120cc8339e7a4ec38

                            SHA512

                            a5281a8fa6f091fd0ee0efeee1505ed969ece927aaf1155ca4fa83cc390945d711c4ffd49c206bf2452d0a804efd8ed3ba47bc53b17ba1891cf252a37e69af39

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

                            Filesize

                            9KB

                            MD5

                            168f9d8e226b52704875ba123d8a40c5

                            SHA1

                            8c00472396052a02100ba88f8f0bfb8c69f1e8cf

                            SHA256

                            e089bf862b972f35f8e5884dc8f052b93fc010d8c65848cfebee089fe232c968

                            SHA512

                            7a51f6fdb7f8b6bc15492b11509150e66a12288cfa9166a6785ef6291423af86ed5f2953d15e2f5e2228294390f53b7ec04c30b52284999be785a77da78c42f4

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

                            Filesize

                            9KB

                            MD5

                            a1a9a67d344beff4bdea894d58362595

                            SHA1

                            43136bbbf3e7ddb94db8fc12f4ac5872f6c472a2

                            SHA256

                            c51dce791bd122941e20e9debd76c371855749bb1e8ad676c11fa7ffcb3389dd

                            SHA512

                            0e24cffb909fc9d93abd0e5885125eec4451d25169e4158a0d9193892fef27084a0d29de042544530514cbdf7a17c0bedce5c5a6a7b675db79e71d27e3485dc7

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

                            Filesize

                            9KB

                            MD5

                            a627cbea3bee4418fe00c02c0fd25c40

                            SHA1

                            fb9b4e836e0ff5aa458145aaeb5d54a451eb6e69

                            SHA256

                            374a1be7ed98671197540431f8cf1fa5f75ad4ea6b89242bb58bb26ff82d83dc

                            SHA512

                            99dd6293900b323e2cf2f70555104861e758844c953c16bccd630482ae62580dfeff341ca2e767dcb62f073077d19faed33be39e38ca37ceaf55e7f1627f5785

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

                            Filesize

                            9KB

                            MD5

                            4c21c4b90f2ce3da452472e28e471ccc

                            SHA1

                            88e2d4da2da557f01db1ec76dccaa910954615d8

                            SHA256

                            67544f7fc5dfb33e8f28691a1bacc8cccb87d5a188e3463bad9b1e7898c44eb7

                            SHA512

                            a3fe4679f89ea7b3469d641f3f1aaa91085aa73d3d7e12c274b3e857c12d1265d3269ea203376875dd61777b546b9dddb2a892889e28a806570cc8f878581247

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

                            Filesize

                            15KB

                            MD5

                            a95fe58b516ffe1f0511111b58b98830

                            SHA1

                            7ec2f608c0c97625faaf5c86aa0b092fe7d2e26e

                            SHA256

                            6a04ea4ae8dcd6b487da9e2d31afcdb73b94aaf419192144353ca4fb2dfec53f

                            SHA512

                            2906fbbcf12a4bb459cc77444a7926d3ac70ed2275dc0a99675258134acf57d36d0aa5126ee09cc36ba76f16ebdc016a27362199d4da49b20590fea216233703

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

                            Filesize

                            236KB

                            MD5

                            d710badea6e04fb766d455682b320940

                            SHA1

                            18b301a4014ff7fb5a6a7eefa0a57ebca69bcd38

                            SHA256

                            1ac2e911d46e3df5296a67f8fec143936f77278c04604240b041ac093ce4f4ea

                            SHA512

                            c8b2f8520562487349b01f5d3972ff882d37f0fc98f9464eb13fa8e7587f80ce4708763e9d8032cbdc19c791fcab8dcc918125538d6ade8083179b8f4bdfbfe5

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

                            Filesize

                            236KB

                            MD5

                            4f5dbd8eaa3e3bf65a3601da12f44d13

                            SHA1

                            86164fa84be2b90e95cbcef962f3bad9a2062f77

                            SHA256

                            929c9fc033163edf3c028355ae533231af205823657ad778265105e2b0c48ba1

                            SHA512

                            34bed516f39b9734f313a0e6975bab3502761094c75b05109c0aa84b160901bef0d84ef5f286d42b7d98a1e3b1f9ea1186a6ba8a87403f9988be60cb53bb6882

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

                            Filesize

                            3.1MB

                            MD5

                            73565f33ed4d8741291cbb30409f1727

                            SHA1

                            4d3a54b28f3ea80f884a25905e27165bdc353109

                            SHA256

                            aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                            SHA512

                            d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                          • memory/1976-40-0x000000001DF80000-0x000000001E4A8000-memory.dmp

                            Filesize

                            5.2MB

                          • memory/1976-15-0x000000001D540000-0x000000001D57C000-memory.dmp

                            Filesize

                            240KB

                          • memory/1976-10-0x000000001C830000-0x000000001C880000-memory.dmp

                            Filesize

                            320KB

                          • memory/1976-14-0x000000001C8C0000-0x000000001C8D2000-memory.dmp

                            Filesize

                            72KB

                          • memory/1976-11-0x000000001C940000-0x000000001C9F2000-memory.dmp

                            Filesize

                            712KB

                          • memory/5104-5-0x0000000000420000-0x0000000000744000-memory.dmp

                            Filesize

                            3.1MB

                          • memory/5104-4-0x00007FFD6EDA3000-0x00007FFD6EDA5000-memory.dmp

                            Filesize

                            8KB

                          • memory/5104-9-0x00007FFD6EDA0000-0x00007FFD6F862000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/5104-6-0x00007FFD6EDA0000-0x00007FFD6F862000-memory.dmp

                            Filesize

                            10.8MB