Analysis

  • max time kernel
    84s
  • max time network
    85s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    22-11-2024 17:22

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 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:4132
  • 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:2796
    • 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:1584
    • 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:3484
      • 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:2172
  • 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:2528
    • 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,0x7ffa68ffcc40,0x7ffa68ffcc4c,0x7ffa68ffcc58
      2⤵
        PID:3132
      • 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=2088,i,2242999159316974564,10709544277888735664,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2084 /prefetch:2
        2⤵
          PID:3164
        • 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=1936,i,2242999159316974564,10709544277888735664,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2112 /prefetch:3
          2⤵
            PID:4328
          • 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,2242999159316974564,10709544277888735664,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2304 /prefetch:8
            2⤵
              PID:4532
            • 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=3160,i,2242999159316974564,10709544277888735664,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3164 /prefetch:1
              2⤵
                PID:5092
              • 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=3188,i,2242999159316974564,10709544277888735664,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3212 /prefetch:1
                2⤵
                  PID:832
                • 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=3716,i,2242999159316974564,10709544277888735664,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3728 /prefetch:1
                  2⤵
                    PID:4296
                  • 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=4804,i,2242999159316974564,10709544277888735664,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4828 /prefetch:8
                    2⤵
                      PID:220
                    • 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=4832,i,2242999159316974564,10709544277888735664,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4860 /prefetch:8
                      2⤵
                        PID:3528
                    • 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:1204
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                        1⤵
                          PID:2604

                        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

                          da045f97ecfa8d42c7920ec2aadd90ca

                          SHA1

                          798eddd6aa7861208e2f61799d7f450fe1d622f3

                          SHA256

                          aac6609f6fbf4d64a9955765e6b4710f2cb14f8d5bf523d8a3108eb0ad1deb3f

                          SHA512

                          735e7e7eebc59d949d691e424d67fc87b666ad8c1b253411190fd653148ed81f824399bbeb52667a84ea6016cec4f91ba4083261471cec3e0abedeaa94019402

                        • 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

                          354B

                          MD5

                          beb4a362076118b400c9789563f8d745

                          SHA1

                          ca4cde2ea6d30cbeb04d5b4a597e017b83bcc502

                          SHA256

                          c02e4d5f93e4440ccdd8eb9b316fa5f98e88ff954097f444908f9389321dfe76

                          SHA512

                          06492e02f6cd6b05179e75d78a8023f6b185e29b2f2733c167e3456c7393488811d3e42979aa4616e983f510447c985324aa38787547c91b751e63e3391b103c

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

                          Filesize

                          9KB

                          MD5

                          65597b8c8c112d84fffd054b3921083e

                          SHA1

                          0c2cdbd29c135f37ddd48db0d2787a538c0b363c

                          SHA256

                          81df80fff28dd235ce4d424b6b8f062be75c19ff4f41a0777a5d566bca512d36

                          SHA512

                          f0d73e462c72bd0ba30c0a241c5223396be029bc130a2df384486a420997ac9071ca3aaf2d4c75f1f69a81fc2f0807e00575d68cbe7c92691d24aa642a079602

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

                          Filesize

                          9KB

                          MD5

                          ccf268331d1ca87393b91f73e7324ef3

                          SHA1

                          74fd14b296ff68750d7f963b4655e26d3cba50d1

                          SHA256

                          f32eb59d57c0d454e65a4bbc306a9a76d5e34a341599dcb91897f53ba6b7e6bf

                          SHA512

                          16332dde3f0cc1edcc6a64e08fd431d1b0b11e68d15cbd783804419c638d4c815adb740d7ca86f46e0c2bfa5fd2a7a3fb6f4acf4acf1ae1ee467dddb2344d9df

                        • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\b62d848d-ff88-411a-82ed-43ddab32e38c.tmp

                          Filesize

                          15KB

                          MD5

                          8757d11d6c783b80810c8f6cdc1c1fc3

                          SHA1

                          ad5807531dab4f497c1f48e585aeb3bae11c43e9

                          SHA256

                          dfe2f5e40c9b440e293a92c925cb392e316f12b5a6f2851e828a3bb8b00ca7e7

                          SHA512

                          457c11c208aff5a4f3cb24c707423f505aeab3171c8045b6140ae8d8f772f7d4c7b3597a0fee10bb49d929fca3feae19dc65f85856cb05bc8a2e0ecac1f53c5d

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

                          Filesize

                          236KB

                          MD5

                          d87fdc6bef2ea38bc1480ecfa3ff6517

                          SHA1

                          4ae382f92ac91730369342246f69dbff020d5390

                          SHA256

                          b93af5a08cb4fa2986645ffc9c14a10bc19d8712590422d75a1a60b04488b08a

                          SHA512

                          3dbb41dcd01ec36fa885f937f154162145dae674ecaf5282016bec7d0cc178b7f71dcb636aafc8ad933e6dea0cb7cdf82c9ced509198d88083f5a124b648539e

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

                          Filesize

                          3.1MB

                          MD5

                          73565f33ed4d8741291cbb30409f1727

                          SHA1

                          4d3a54b28f3ea80f884a25905e27165bdc353109

                          SHA256

                          aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                          SHA512

                          d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                        • \??\pipe\crashpad_2528_GMTXBIVBYCBEMRLI

                          MD5

                          d41d8cd98f00b204e9800998ecf8427e

                          SHA1

                          da39a3ee5e6b4b0d3255bfef95601890afd80709

                          SHA256

                          e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                          SHA512

                          cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                        • memory/2796-9-0x00007FFA6FC20000-0x00007FFA706E2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2796-6-0x00007FFA6FC20000-0x00007FFA706E2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2796-5-0x0000000000B10000-0x0000000000E34000-memory.dmp

                          Filesize

                          3.1MB

                        • memory/2796-4-0x00007FFA6FC23000-0x00007FFA6FC25000-memory.dmp

                          Filesize

                          8KB

                        • memory/3484-15-0x000000001CF30000-0x000000001CF6C000-memory.dmp

                          Filesize

                          240KB

                        • memory/3484-14-0x000000001C3B0000-0x000000001C3C2000-memory.dmp

                          Filesize

                          72KB

                        • memory/3484-11-0x000000001C430000-0x000000001C4E2000-memory.dmp

                          Filesize

                          712KB

                        • memory/3484-10-0x000000001B2E0000-0x000000001B330000-memory.dmp

                          Filesize

                          320KB