Analysis

  • max time kernel
    105s
  • max time network
    109s
  • 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 04:36

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: GetForegroundWindowSpam 1 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 behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:4224
  • 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:1396
    • 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:4720
      • 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:884
  • 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:3064
    • 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,0x7ffe422acc40,0x7ffe422acc4c,0x7ffe422acc58
      2⤵
        PID:1692
      • 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=2068,i,4560130318052108521,15202894457387957540,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1996 /prefetch:2
        2⤵
          PID:4092
        • 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=1624,i,4560130318052108521,15202894457387957540,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2104 /prefetch:3
          2⤵
            PID:4372
          • 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,4560130318052108521,15202894457387957540,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2284 /prefetch:8
            2⤵
              PID:1972
            • 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=3156,i,4560130318052108521,15202894457387957540,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3164 /prefetch:1
              2⤵
                PID:2016
              • 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=3172,i,4560130318052108521,15202894457387957540,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3204 /prefetch:1
                2⤵
                  PID:1560
                • 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,4560130318052108521,15202894457387957540,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3696 /prefetch:1
                  2⤵
                    PID:2548
                  • 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=4444,i,4560130318052108521,15202894457387957540,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4832 /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=5020,i,4560130318052108521,15202894457387957540,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5040 /prefetch:8
                      2⤵
                        PID:2368
                    • 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:60
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                        1⤵
                          PID:2448

                        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

                          18bd823bbd14822fe24aacd4ea684409

                          SHA1

                          7f648725f531f5967d669c88b241daa73088b150

                          SHA256

                          bdc00c89de267d5bb5a52bebb56ef79628d65d667e24fa71f0e369f77935b865

                          SHA512

                          5c30f802185c06f74aaed5558463dcc80828377724004eec0cbeb7365863314fe8aee8ba0dfa63d1871683582708c7f05871898866e1395a12739accc0e548c6

                        • 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

                          79bd464cbf9c24131f2a3e787978052f

                          SHA1

                          33250b2ceb703d0ae652bc749f94ddde9db413a3

                          SHA256

                          82c9733a8576fb00657cd2905c5f0077e95e3492d53a23dddc12a9100d9da9f0

                          SHA512

                          7adff641313bcec158b3348a487105175043b77558d936243b5299ee9615ffb87dee093f650fb76269fd6f1b446927c82899eac1bb7530277b70fa679e08da91

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

                          Filesize

                          9KB

                          MD5

                          40b0622e602e28a1e481ef3c56dea105

                          SHA1

                          cf281f5142b7715d8f2fa1ac77b29032611e0877

                          SHA256

                          0e1d0e7622a61c01bec884a57a3243c1326aa3df827810aade0402d52d054f33

                          SHA512

                          3f3966b4086a3256459c106ac3e4350c826112b49f5d77545fb5b277371e9f7336ef75e41810d2f223a9590db706ba3d710de30002ad7e699d7485da3c9fed57

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

                          Filesize

                          9KB

                          MD5

                          47f7d8205193483eb360c786486601fb

                          SHA1

                          adf595a12798c66aa4ab90b0a1c59670811785e5

                          SHA256

                          1eb978a76a2dfda5dd9b7ffef8cc1a4b4e19a8b4f4531d4be88f41e9c7b890d6

                          SHA512

                          c1f2bbb7a1ba212123c565e79ad2353eebfd50ea92bf67412c9459830413a8e11fb0d51e9574f6c6adcdbe82a08935570b77a1d8bd0f044f861659c893a797fb

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

                          Filesize

                          15KB

                          MD5

                          6804096f9df3b337ac982977495d2615

                          SHA1

                          f3a186fb4655889c34a19ecc96c42353f0cbf9d3

                          SHA256

                          cdbae7171576bf11cb468325e0f73098b7683e5d1f1fb857fb53637612a3303e

                          SHA512

                          579f3a2284964a0776e0dc4691b8e7a080eef5bd78dc50a38ffa2244e9bbb9cbbae21a5a7458316a3a649e090e63bd876ae4f88492b87f116601b1d9d6db9b8c

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

                          Filesize

                          236KB

                          MD5

                          2ee0b820386e36d9d7053bf815c861df

                          SHA1

                          976e3582b980370b68ec9656f5185a3e816a9385

                          SHA256

                          3bf273a6e8024a3748e5e817dd9af76e4fee994c1a2770336e59de28e6bdc502

                          SHA512

                          078dfca0f18d6b1a9892447098c31719120d5edd43cb13ec5e43bef87251137f7d0a0667e19ad6f0b98f2f04bbf1764061f1c6b1252e481270f4a0a5a6fd64f2

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

                          Filesize

                          236KB

                          MD5

                          97e475cb0cafa07449d42c882f382a49

                          SHA1

                          97be2ae5c37b36becf4bf983e24b041e9c881930

                          SHA256

                          c2e2ec1953ae3ec79b8ab17d3714da52b2dbcb9838f0dbd754edcddf5449fa11

                          SHA512

                          c3347a11f2f1fda117a539d4715bdfb5ecba767348fc0a222bcb8489e6d7fac2e52656f0feb0d7948827fcef65e51717bfc81b85e83ff0d39fe019a729d4f9fc

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

                          Filesize

                          3.1MB

                          MD5

                          73565f33ed4d8741291cbb30409f1727

                          SHA1

                          4d3a54b28f3ea80f884a25905e27165bdc353109

                          SHA256

                          aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                          SHA512

                          d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                        • \??\pipe\crashpad_3064_SPITBGRXPKDUCXYG

                          MD5

                          d41d8cd98f00b204e9800998ecf8427e

                          SHA1

                          da39a3ee5e6b4b0d3255bfef95601890afd80709

                          SHA256

                          e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                          SHA512

                          cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                        • memory/2796-9-0x00007FFE47E80000-0x00007FFE48942000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2796-6-0x00007FFE47E80000-0x00007FFE48942000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/2796-5-0x0000000000570000-0x0000000000894000-memory.dmp

                          Filesize

                          3.1MB

                        • memory/2796-4-0x00007FFE47E83000-0x00007FFE47E85000-memory.dmp

                          Filesize

                          8KB

                        • memory/4720-15-0x000000001CF40000-0x000000001CF7C000-memory.dmp

                          Filesize

                          240KB

                        • memory/4720-14-0x000000001CEE0000-0x000000001CEF2000-memory.dmp

                          Filesize

                          72KB

                        • memory/4720-11-0x000000001CF80000-0x000000001D032000-memory.dmp

                          Filesize

                          712KB

                        • memory/4720-10-0x000000001CE70000-0x000000001CEC0000-memory.dmp

                          Filesize

                          320KB