Analysis

  • max time kernel
    92s
  • max time network
    93s
  • 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 01:58

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 17 IoCs
  • Suspicious use of FindShellTrayWindow 29 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:472
  • 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:3268
    • 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:4836
    • 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:1960
      • 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:4536
  • 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:4336
    • 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,0x7ffdcff0cc40,0x7ffdcff0cc4c,0x7ffdcff0cc58
      2⤵
        PID:3276
      • 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=1964,i,6014398313366535691,10822503613557170627,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=1952 /prefetch:2
        2⤵
          PID:456
        • 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=2092,i,6014398313366535691,10822503613557170627,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2072 /prefetch:3
          2⤵
            PID:4220
          • 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=2280,i,6014398313366535691,10822503613557170627,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2480 /prefetch:8
            2⤵
              PID:4260
            • 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=3176,i,6014398313366535691,10822503613557170627,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3196 /prefetch:1
              2⤵
                PID:892
              • 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=3204,i,6014398313366535691,10822503613557170627,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3228 /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=4616,i,6014398313366535691,10822503613557170627,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4624 /prefetch:1
                  2⤵
                    PID:1652
                  • 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=4800,i,6014398313366535691,10822503613557170627,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4852 /prefetch:8
                    2⤵
                      PID:1212
                    • 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=4980,i,6014398313366535691,10822503613557170627,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=5008 /prefetch:8
                      2⤵
                        PID:4160
                    • 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:4472
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                        1⤵
                          PID:1456

                        Network

                        MITRE ATT&CK Enterprise v15

                        Replay Monitor

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                        Downloads

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

                          Filesize

                          649B

                          MD5

                          5542d18ca3819e012d192ea37fdc5e61

                          SHA1

                          5ffda569eb61199456c55d8d42b6805ee2323f60

                          SHA256

                          cff66c2892ae9507e17ede537a016fd9c5f360527e1a40a06702d993d776b626

                          SHA512

                          b16efa8ecf702a2b377436661a82aa548bdbd96deba506bc9586b0d1f519c5e5bf77922da0035c388865390707d2cf12cfccaee53d547fb3a3d8fc9bc12b7925

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

                          Filesize

                          2KB

                          MD5

                          cd494613c43383336f6008e3838c6f31

                          SHA1

                          e8e710788029c9bc7132d8b7cab1007028fa30ea

                          SHA256

                          d0ebb6d645def1d6c0d6a9a9af7939f1adaec1cb25ef93867d468f71c8ec8cb7

                          SHA512

                          2e05774ef1c60782dea99a44051fdb44a8c369668a2d2050dcf1de0ae3730b029145ad1ad408875f91ba453a17d0d7a307675f742a6b494747c0b02566500c06

                        • 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

                          06a5b98e67b4e6739d77353b9c2fb5f7

                          SHA1

                          bd9e69ae2742cd99fc70102cf6700afd4e2ae300

                          SHA256

                          7c06d5c0a97ce2b0485bf8035279b9e625f62afab1afd0cb441dbc4df28e94ce

                          SHA512

                          44a039c0b65c21a8f3cd1c33ef94e3689264e097740ee318d628892df439e50885e04eda1d3c21eaeaeff9de21a6b98567bc88eef9cc6eb7e29b67e013d63e67

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

                          Filesize

                          9KB

                          MD5

                          8a652d3525445c8b9637e36c99584832

                          SHA1

                          41c845101c6e8ca71664cd3558a70acecf3a8161

                          SHA256

                          10ccdcb0483a9d5ac9f6d8469e8742c3c14fd854dc106436bded6ebabda48f26

                          SHA512

                          24459d53fb6533ab20e5ae0591d94143a03676370d90b32e8338af37985aca09cf6e584a4615cd3ae7454a1b3a498783650b7ca6bd3e0ea4ecc50b03b3f454d4

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

                          Filesize

                          15KB

                          MD5

                          0c1cf44499a1dcf8b4c92c42e35834cd

                          SHA1

                          01cf0848ca1d5901852d9c026e105caa4f901b83

                          SHA256

                          4605bfd649d68411885a2d785af446bd3e0d560f8a73be06848ca7828159de98

                          SHA512

                          436d1946c14aefd2497f605f6d0bac5e767e37e2bd17839641c2a860b8820c528cba43ed4c22c9934d7fca3b1cf170312f5b76b8c77b748ff4572a19cd034f54

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

                          Filesize

                          236KB

                          MD5

                          27836304257d2d6caf32de0119bb3da3

                          SHA1

                          242bbb4aecfdc694803e9c11c367c7fd7b361284

                          SHA256

                          11f69915c94e9b2ae521bed330ea6b8c497eb8dfe910648f155b4000dde140b4

                          SHA512

                          a15342d6e9f5a00420da3c6f46e76f75531deb8679c979a0faa17078259b01e67a8d761ee06310b87b4a3d1b48e40261983bd1cd5b36d20bce3987fccc8c8b36

                        • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\ShaderCache\data_1

                          Filesize

                          264KB

                          MD5

                          f50f89a0a91564d0b8a211f8921aa7de

                          SHA1

                          112403a17dd69d5b9018b8cede023cb3b54eab7d

                          SHA256

                          b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                          SHA512

                          bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

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

                          Filesize

                          3.1MB

                          MD5

                          73565f33ed4d8741291cbb30409f1727

                          SHA1

                          4d3a54b28f3ea80f884a25905e27165bdc353109

                          SHA256

                          aafe953e627f9e733e101d7211f0c9594dbdf82ec4019b2c9aa361cbc478f0de

                          SHA512

                          d897b098ddcdc94ac9177bc9a90b700c8b9a7cfafa74f729beebf74a094f76a7bd69e764711bdfedcdd231465daef16e937676e391ca2c010df03fecc863b583

                        • \??\pipe\crashpad_4336_MOWKJQOPLROOHVXG

                          MD5

                          d41d8cd98f00b204e9800998ecf8427e

                          SHA1

                          da39a3ee5e6b4b0d3255bfef95601890afd80709

                          SHA256

                          e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                          SHA512

                          cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                        • memory/1960-15-0x000000001B470000-0x000000001B4AC000-memory.dmp

                          Filesize

                          240KB

                        • memory/1960-14-0x0000000002940000-0x0000000002952000-memory.dmp

                          Filesize

                          72KB

                        • memory/1960-11-0x000000001B270000-0x000000001B322000-memory.dmp

                          Filesize

                          712KB

                        • memory/1960-10-0x0000000002750000-0x00000000027A0000-memory.dmp

                          Filesize

                          320KB

                        • memory/3268-9-0x00007FFDBF7F0000-0x00007FFDC02B2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/3268-6-0x00007FFDBF7F0000-0x00007FFDC02B2000-memory.dmp

                          Filesize

                          10.8MB

                        • memory/3268-5-0x00000000006A0000-0x00000000009C4000-memory.dmp

                          Filesize

                          3.1MB

                        • memory/3268-4-0x00007FFDBF7F3000-0x00007FFDBF7F5000-memory.dmp

                          Filesize

                          8KB