Analysis

  • max time kernel
    70s
  • max time network
    74s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    28/11/2024, 06:02

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:852
  • 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:2200
    • 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:684
    • 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:2940
      • 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:3200
  • 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:2984
    • 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,0x7fff0d9ecc40,0x7fff0d9ecc4c,0x7fff0d9ecc58
      2⤵
        PID:1244
      • 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=2012,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2004 /prefetch:2
        2⤵
          PID:3448
        • 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=1840,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2120 /prefetch:3
          2⤵
            PID:928
          • 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=2336,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2320 /prefetch:8
            2⤵
              PID:3284
            • 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=3164,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3184 /prefetch:1
              2⤵
                PID:4140
              • 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=3192,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3308 /prefetch:1
                2⤵
                  PID:2600
                • 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=3752,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4596 /prefetch:1
                  2⤵
                    PID:1772
                  • 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=4384,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4740 /prefetch:1
                    2⤵
                      PID:560
                    • 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=4784,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4924 /prefetch:8
                      2⤵
                        PID:4696
                      • 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=5032,i,215563195579836595,15692551097192020102,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3552 /prefetch:8
                        2⤵
                          PID:2516
                        • 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:2796
                          • 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,0x2a0,0x274,0x2a4,0x7ff6a90f4698,0x7ff6a90f46a4,0x7ff6a90f46b0
                            3⤵
                            • Drops file in Windows directory
                            PID:4916
                      • 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:3680
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                          1⤵
                            PID:2560

                          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

                                  4ec7d565541cffb83ef1c7887cd07018

                                  SHA1

                                  cf3ed220b36e4a27cd0f153f7c61b60268d160b9

                                  SHA256

                                  94f7c03b4953ec6b94e5e87d97c85f73d916628a25616a3feb2d68b7170bf1a3

                                  SHA512

                                  3013df0d2c11b3b911856fe5f47f7192c5d6704835991d3c584a372339e823be54e2df5572e9ac6e276af8db12b230865170bb422f383b3883420f41c249c444

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

                                  Filesize

                                  215KB

                                  MD5

                                  2be38925751dc3580e84c3af3a87f98d

                                  SHA1

                                  8a390d24e6588bef5da1d3db713784c11ca58921

                                  SHA256

                                  1412046f2516b688d644ff26b6c7ef2275b6c8f132eb809bd32e118208a4ec1b

                                  SHA512

                                  1341ffc84f16c1247eb0e9baacd26a70c6b9ee904bc2861e55b092263613c0f09072efd174b3e649a347ef3192ae92d7807cc4f5782f8fd07389703d75c4c4e2

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

                                  Filesize

                                  216B

                                  MD5

                                  a2742ae64c22b65476e7c95226db4abb

                                  SHA1

                                  79bd122bfc3fee1291ed26dec2ec5f556e993c8c

                                  SHA256

                                  0b973a0baa9173b701644ea950c03fd41412b8e71e533d6b665fa1baa3a1e0a1

                                  SHA512

                                  faf0b312962b86612a79bd4ecb625810cc999771e0d0c2f7046c443b4c9b9e18e0d65a0d1610915f17cdb8b0e6fc614675e5070c38c37cd356b73fc3785a5cf8

                                • 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

                                  bb9846f52fbe9fded3bd563a6285c956

                                  SHA1

                                  8180fc47ffa4270cdfab270a383de4dddd675be5

                                  SHA256

                                  97826fc1126334e89ea3774982e6063472fc53103139ae49eafe15ca48e6002c

                                  SHA512

                                  785708abe16a112d183d4fd290328f24b589914f1d7dbeb5aa0f0a733d5f774d1e7b213986997fab7c8741b804e7b17e5cdc3bd9d8cd73fa9ac31249fcdcdfb6

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

                                  Filesize

                                  9KB

                                  MD5

                                  65d28574e5831ae51d64a823501a8346

                                  SHA1

                                  98fe5133525222cc41f4d3db99b9261088bcb5c6

                                  SHA256

                                  cbe597622329d54fc1d6fee430ceb2e77d2e2113a47b483ce75ad4663b08e1a1

                                  SHA512

                                  ee5a316ca5cd665d2752458ee7c053cd5d59406928a2223927727a4ee2e7312deba89387791c4da26e695182baa13ce3aae9701394e316fa3a4cc08a6b437e45

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

                                  Filesize

                                  9KB

                                  MD5

                                  fd078ddee5ad65ab6090739ddd427f92

                                  SHA1

                                  918176a8c8aa8dc3d3cff871695402f655a4e9bd

                                  SHA256

                                  ae5afe61f462aaa973468256c762fab276b63f39287ccae0dcd6a9470fde2b13

                                  SHA512

                                  4d36ec1bb18ec6f5d80c1a89100d67a20c83f2e7bd665a3ce85c8b4142cab9e86c8902d7c9596e54329b13a811936e903411ce17cb5861fc8c49dbb40c29334e

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

                                  Filesize

                                  15KB

                                  MD5

                                  63bcbd38f1a538ff77be0d67ad4fbee9

                                  SHA1

                                  74bb3e734a8df53504b3b9dfbed5bccef3eb95a8

                                  SHA256

                                  06f600578ab80478c582e38f4a7b56016166c91f279b5d8f8c5d2b55f165718e

                                  SHA512

                                  be1d528667a831bce5dc48282f600962353975637b5479f3cf0a800feb59d89608918926ab222bc5134ed3c56739611b48499a38fffea4f1ab23730158544df2

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

                                  Filesize

                                  236KB

                                  MD5

                                  7d401001b0d919f0aec0a387915a7e03

                                  SHA1

                                  07def476606262dc509d040925334b97cc37c4b0

                                  SHA256

                                  ce03d96ff8087020421b04b758dc1020ac9b575fb126afe4f78ab5af719ca2f9

                                  SHA512

                                  44c6772e7f05635eb2df925e0bb136c7b8e867d4afe7990760ca30d79fe2590f0bc423871ef9dbf9e86d35a2235895da87a377c0e58c610d5cd708e15d4bfeb3

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

                                  Filesize

                                  3.1MB

                                  MD5

                                  73565f33ed4d8741291cbb30409f1727

                                  SHA1

                                  4d3a54b28f3ea80f884a25905e27165bdc353109

                                  SHA256

                                  aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                                  SHA512

                                  d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                                • memory/2200-6-0x00007FFF139F0000-0x00007FFF144B2000-memory.dmp

                                  Filesize

                                  10.8MB

                                • memory/2200-9-0x00007FFF139F0000-0x00007FFF144B2000-memory.dmp

                                  Filesize

                                  10.8MB

                                • memory/2200-5-0x00000000001D0000-0x00000000004F4000-memory.dmp

                                  Filesize

                                  3.1MB

                                • memory/2200-4-0x00007FFF139F3000-0x00007FFF139F5000-memory.dmp

                                  Filesize

                                  8KB

                                • memory/2940-10-0x00000000028E0000-0x0000000002930000-memory.dmp

                                  Filesize

                                  320KB

                                • memory/2940-40-0x000000001D9D0000-0x000000001DEF8000-memory.dmp

                                  Filesize

                                  5.2MB

                                • memory/2940-11-0x000000001C4A0000-0x000000001C552000-memory.dmp

                                  Filesize

                                  712KB

                                • memory/2940-14-0x000000001B330000-0x000000001B342000-memory.dmp

                                  Filesize

                                  72KB

                                • memory/2940-15-0x000000001C3E0000-0x000000001C41C000-memory.dmp

                                  Filesize

                                  240KB