Analysis

  • max time kernel
    87s
  • max time network
    87s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    05/11/2024, 18:45

General

  • Target

    kreo q zi.7z

  • Size

    922KB

  • MD5

    ec516db688f94e98d5141f4bade557e9

  • SHA1

    198ffbae5eed415ac673f5e371774759f1a53de1

  • SHA256

    282d6f5ddc83351dab51e6decc1293b078638f0cfd0baca4673afc8246fd32bd

  • SHA512

    ecc34ad7d15fbedbbc4e62b469f5e6e5e71099e19831574da61dc9f751ed5b2faad1676b8b3dbf0911c4dac628c7a15e9d07d953692c5ab1b700ea07f6396985

  • SSDEEP

    24576:yScP7qLl4iGQATiKL0aywxTodSrUF+nVZLLymvgDoSAWcNtMXqWOU:07qLl4KATiJUo0UEnLmmvqiWcNtMXDOU

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

hola435-24858.portmap.host:24858

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 59 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\kreo q zi.7z"
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2844
  • C:\Users\Admin\Desktop\kreo q zi.exe
    "C:\Users\Admin\Desktop\kreo q zi.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4320
    • 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:5044
    • 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:3968
      • 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:4640
  • 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:4264
    • 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,0x7ffa0878cc40,0x7ffa0878cc4c,0x7ffa0878cc58
      2⤵
        PID:2396
      • 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=2092,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2088 /prefetch:2
        2⤵
          PID:3436
        • 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=1928,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2160 /prefetch:3
          2⤵
            PID:4760
          • 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=2104,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=2452 /prefetch:8
            2⤵
              PID:3444
            • 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=3112,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3172 /prefetch:1
              2⤵
                PID:720
              • 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=3120,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=3228 /prefetch:1
                2⤵
                  PID:4784
                • 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=4536,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4524 /prefetch:1
                  2⤵
                    PID:3980
                  • 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=4472,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4700 /prefetch:8
                    2⤵
                      PID:4416
                    • 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=4808,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4820 /prefetch:8
                      2⤵
                        PID:4332
                      • 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=4880,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4684 /prefetch:8
                        2⤵
                          PID:1792
                        • 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=4804,i,18297551732818362267,13847502351538298407,262144 --variations-seed-version=20241022-180310.361000 --mojo-platform-channel-handle=4792 /prefetch:8
                          2⤵
                            PID:2436
                        • 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:2696
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                            1⤵
                              PID:4004

                            Network

                            MITRE ATT&CK Enterprise v15

                            Replay Monitor

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                            Downloads

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\15f7c646-a361-40fe-96cb-c2c7ce174163.tmp

                              Filesize

                              649B

                              MD5

                              13b5db5d89a9168fb0d1d6794941cba3

                              SHA1

                              57592db2b4bfa50317395091b700ec96ca408985

                              SHA256

                              4bb3055191ec7d54c0246edf0c7dccc82a03350e8e10652aa6e460992a5bdb19

                              SHA512

                              cc9a3be02b44874bf14020ec8d8bceb878fa8d8b24a64202432a6473d7a39df9d32c4d8c5e007a1a24271a194c2d9208da52af1c81cd13c5cdfb56d1cb9c26e5

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\4af98948-459a-46e9-8954-2a8b762c7e7b.tmp

                              Filesize

                              15KB

                              MD5

                              fa0e257496ffe2d4d3833d1bacdca0c3

                              SHA1

                              aea04e185e7ff09c1a43b27fe4fb2eeba927c9ff

                              SHA256

                              8130eabfe01df036eb71837cec7c9c7a466b8da2ec77a2b451d6e36684172cda

                              SHA512

                              9e8c11ed5c399fbf5c34ce2f180693d3dde3ab5f27574f420caa854144810088fc2783b6e7e10239bf317863deafe6e43b381d9f45979d2ab9ad8d0c5ded1fcf

                            • 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

                              f0e0f3f68ce16b290830c9470d86e5c0

                              SHA1

                              d9050821fb652973d6ae8a5434226781788ca0c5

                              SHA256

                              855d405618c2493729c620294528db49ab593f70aba206829d7132cfcbb0c68a

                              SHA512

                              79bac9c48edce46f8e35c0bab9fedf602dbb4e1ca55f7d5b6b4f9dfd1309e657689163cd0410f68fc44be1265c4f2d3cbcb74eaa3680640ee9006fc8be7813fb

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

                              Filesize

                              8KB

                              MD5

                              42b1774e0a8369c0d30f6fccd010eb8f

                              SHA1

                              e031d464665cb647029fc38237f0b26e2c39ff75

                              SHA256

                              98b321a8891a7c82a5283d64bc36d41093e473618a8555847167f1c2f4168e65

                              SHA512

                              b8c29cd8d8915f6a7de7e9f279911501eaec82262138f57bd0ef3aa6e4c24850a5df8e4f3b394823a774d3ff3e607d88599060dd812ac28aed53bfa492a6a91c

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

                              Filesize

                              8KB

                              MD5

                              e824d64e68063219bc8472eae68a0715

                              SHA1

                              2296ac13f23755bb50adc5786332fc8c70ebc96a

                              SHA256

                              2047f71ad1c781340cabe8cec03f598fc7af1879e2002f503ca14110bdb37139

                              SHA512

                              75536cada4d48c956ee31abac067faa9cf28186230e958562bf12575994294ad51ef860a8d0267c967b42802a740148859af524b0be89872de9dc7ea4966690a

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

                              Filesize

                              233KB

                              MD5

                              53088eae3ea01258235ffd86044c9503

                              SHA1

                              0b4b88f66fbd8d143b365fb43c5628e53802ddc9

                              SHA256

                              29ee864ec1775df14c5ef6537e0870e0dc381121aa8d1df8d0bb56275d265ca2

                              SHA512

                              848f60acb707b990a01b44972f5bf063c9e39f0fac83a39142d3388510080f76223748d165ff3f96e19bc1a262c97d2ecfde030570ab27cca9902f98e2698a01

                            • C:\Users\Admin\Desktop\kreo q zi.exe

                              Filesize

                              3.1MB

                              MD5

                              28ac02fc40c8f1c2a8989ee3c09a1372

                              SHA1

                              b182758b62a1482142c0fce4be78c786e08b7025

                              SHA256

                              0fe81f9a51cf0068408de3c3605ce2033a00bd7ec90cc9516c38f6069e06433b

                              SHA512

                              2cbf2f6af46e5fae8e67144e1ac70bc748036c7adb7f7810d7d7d9f255ccf5d163cce07f11fb6526f9ab61c39f28bdf2356cc315b19a61cd2115612882eab767

                            • memory/3968-15-0x000000001CC70000-0x000000001CCAC000-memory.dmp

                              Filesize

                              240KB

                            • memory/3968-14-0x000000001C0F0000-0x000000001C102000-memory.dmp

                              Filesize

                              72KB

                            • memory/3968-11-0x000000001C170000-0x000000001C222000-memory.dmp

                              Filesize

                              712KB

                            • memory/3968-10-0x000000001AF00000-0x000000001AF50000-memory.dmp

                              Filesize

                              320KB

                            • memory/4320-9-0x00007FFA0ECC0000-0x00007FFA0F782000-memory.dmp

                              Filesize

                              10.8MB

                            • memory/4320-6-0x00007FFA0ECC0000-0x00007FFA0F782000-memory.dmp

                              Filesize

                              10.8MB

                            • memory/4320-5-0x00000000009F0000-0x0000000000D14000-memory.dmp

                              Filesize

                              3.1MB

                            • memory/4320-4-0x00007FFA0ECC3000-0x00007FFA0ECC5000-memory.dmp

                              Filesize

                              8KB