Analysis

  • max time kernel
    92s
  • max time network
    92s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    20-11-2024 05:01

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:1008
  • 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:2700
    • 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:1796
    • 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:5040
      • 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:3540
  • 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:1436
    • 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,0x7ffaa0f8cc40,0x7ffaa0f8cc4c,0x7ffaa0f8cc58
      2⤵
        PID:3152
      • 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=1960,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1956 /prefetch:2
        2⤵
          PID:4336
        • 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=1988,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2160 /prefetch:3
          2⤵
            PID:3680
          • 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=2312,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2280 /prefetch:8
            2⤵
              PID:2220
            • 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=3128,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3184 /prefetch:1
              2⤵
                PID:4988
              • 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=3136,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3232 /prefetch:1
                2⤵
                  PID:4876
                • 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=4504,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3704 /prefetch:1
                  2⤵
                    PID:2416
                  • 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=8 --field-trial-handle=4372,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4408 /prefetch:1
                    2⤵
                      PID:1988
                    • 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=4536,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4548 /prefetch:8
                      2⤵
                        PID:2312
                      • 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=4944,i,14559877804294347661,10303332741154892092,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4960 /prefetch:8
                        2⤵
                          PID:2900
                        • 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:4984
                          • 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,0x2a0,0x258,0x2a4,0x7ff77e574698,0x7ff77e5746a4,0x7ff77e5746b0
                            3⤵
                            • Drops file in Windows directory
                            PID:940
                      • 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:416
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                          1⤵
                            PID:3136

                          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

                            33b1f261512bfd30c43a6f14548f8d9d

                            SHA1

                            2437db696adc8053deea936199fb35d4fc84aa1d

                            SHA256

                            ef4cea33a7eb55814862d632130d187925c500a0f8ddc0727fee7865a5e0572a

                            SHA512

                            1d4a332f337bf93ffee02936df79ab321eeed6215643e8088efefaa8e2b6563461030c7df30585e1a0a5cd818078386e5b315e4ebe09b5bdfa76ff9767d121ca

                          • 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

                            216B

                            MD5

                            a05e1e26f3446463cc0cddf30c5b0035

                            SHA1

                            2662cc64b7791b4294ba6aef8374d0fbdd3a1617

                            SHA256

                            9fb0836f538435556eef3eeeeb075e43dfb98df92106bfc6538b6a4f613112f7

                            SHA512

                            e9d657eaf19ef71a6ecd99021257d0285f967b4dfcb4c8b28ddd8203b5b75c58833d68dd27ed5dfa70f9d29e62b279f8ef2cd83ade5c92ead6380a56fd407030

                          • 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

                            89aae783fcc73e6eba0bcbc47da09980

                            SHA1

                            56e3343d3007e6d694bf4b3468c8d1e2a5f196fc

                            SHA256

                            751c92a9280e39172ebb572f0ccd8c464305122bf514800680db4cb36218c522

                            SHA512

                            452465d88d98f61808e6713051d57808250d3de648e7861fdcb082334146e0b565d3204b04250aecec79c40919904a5b9b764fe61911a62e3745a017f2e94a1d

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

                            Filesize

                            9KB

                            MD5

                            5d89b8a46de2da1784a5aa443e4d972b

                            SHA1

                            c7d9fae2b59a7a4cd15dbc8b625d0203659d4181

                            SHA256

                            351a87c6a45b8989ffc30f4880a83c483aaaa5c5edf67680dd87d9344a734e24

                            SHA512

                            abdf55c032bbccce8e7735b611311979bfd0c849b56b92e1e4c6c0f246508623eaf40f4d744517ad8bf57ff654dd06e95c0829210f5f8b0ae5643fc2065e74a8

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

                            Filesize

                            9KB

                            MD5

                            78d076cdf845d2742daa51533a3b299f

                            SHA1

                            198b60d89c318a60baaa4601f18c902e0b73dc20

                            SHA256

                            37eb26bf7a1dcf6f16d060f8809d0877f114bb6315122075a8398a8039dfecf4

                            SHA512

                            06ffbce843a1edacb0d840da3e8c2b7f479e4754987b456588519c1ceb0ca0ad4e12b72dee7a0269e97f60ca5b5fa7c705941b9639f7431b86ee4810c261a552

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

                            Filesize

                            15KB

                            MD5

                            b0c49c22a5395ceed35f4f02ecf2e989

                            SHA1

                            bee01243a791e13ef0df02567d9f52e6dd1ec50b

                            SHA256

                            e82beabe85bffa70ac26d0eb2a3cf721d9a7f1046aeea2143a11faeba7c49cf5

                            SHA512

                            c437606e3d46139aabb601006eccc9414c139b3baf5c1bcac674f154caffc3e0ea4a1584e54df44d7069ce3ca500ee81710e8233f76770b4953418d1e3ccc0ea

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

                            Filesize

                            235KB

                            MD5

                            888b04bf4bf716353fe6409bc9443a21

                            SHA1

                            bf3d4bec7bc51fa78f86ea745934e7846c011634

                            SHA256

                            a9134a13983630a7502c2e0ad9e4764e1e6c548a5b633007540189c62e59439c

                            SHA512

                            bd13a3de0bb00514856ab2e11e1e6f6b42b6a5f17f2682a8095bd712311569ac4a9eabe42269d3a845a5a8d51643d350f2925adf6b6d603cafd325c655e4bc2b

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

                            Filesize

                            3.1MB

                            MD5

                            73565f33ed4d8741291cbb30409f1727

                            SHA1

                            4d3a54b28f3ea80f884a25905e27165bdc353109

                            SHA256

                            aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                            SHA512

                            d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                          • \??\pipe\crashpad_1436_XPCXUXSKXKWLFKUI

                            MD5

                            d41d8cd98f00b204e9800998ecf8427e

                            SHA1

                            da39a3ee5e6b4b0d3255bfef95601890afd80709

                            SHA256

                            e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                            SHA512

                            cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                          • memory/2700-6-0x00007FFAA6BA0000-0x00007FFAA7662000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/2700-9-0x00007FFAA6BA0000-0x00007FFAA7662000-memory.dmp

                            Filesize

                            10.8MB

                          • memory/2700-5-0x0000000000C90000-0x0000000000FB4000-memory.dmp

                            Filesize

                            3.1MB

                          • memory/2700-4-0x00007FFAA6BA3000-0x00007FFAA6BA5000-memory.dmp

                            Filesize

                            8KB

                          • memory/5040-40-0x000000001E400000-0x000000001E928000-memory.dmp

                            Filesize

                            5.2MB

                          • memory/5040-15-0x000000001C5A0000-0x000000001C5DC000-memory.dmp

                            Filesize

                            240KB

                          • memory/5040-14-0x000000001C540000-0x000000001C552000-memory.dmp

                            Filesize

                            72KB

                          • memory/5040-11-0x000000001C5E0000-0x000000001C692000-memory.dmp

                            Filesize

                            712KB

                          • memory/5040-10-0x000000001C4D0000-0x000000001C520000-memory.dmp

                            Filesize

                            320KB