Resubmissions

07-08-2024 00:14

240807-ajameavelq 10

07-08-2024 00:10

240807-agetcaycqd 10

Analysis

  • max time kernel
    72s
  • max time network
    143s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    07-08-2024 00:14

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    6f2f7543e46ca0cd1eecf947d68b0ec8

  • SHA1

    7cf099fee562af351bebcea654e660fb05a5e736

  • SHA256

    4d9417d9d1f8779020682a3882dc72979a504ea9b71ef51b37084556aa0d7205

  • SHA512

    5851ea5dc7f9160256fb28fb89784fbbe40e244b55f083175382464eafa6c39d8b0c88aead34812c7c9f1abb6ccc1db84f65d379b4e1e6b65f65dc1a1902117c

  • SSDEEP

    49152:ivyI22SsaNYfdPBldt698dBcjHh/RJ6EbR3LoGdf41THHB72eh2NT:ivf22SsaNYfdPBldt6+dBcjHh/RJ6O

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.85:4782

Mutex

d31c90bf-6e6a-483d-9f59-e618a1e6c7c9

Attributes
  • encryption_key

    705FA42F7E103298DD84CEB0EA11F1B6B9143152

  • 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 payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates system info in registry 2 TTPs 3 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 use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 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:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2096
    • 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:1988
    • 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:2188
      • 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:2748
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2656
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe"
      1⤵
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2512
      • 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:7 --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=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7feed049758,0x7feed049768,0x7feed049778
        2⤵
          PID:2484
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1156 --field-trial-handle=1224,i,12011714025456671909,12354573716671871461,131072 /prefetch:2
          2⤵
            PID:2856
          • 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 --mojo-platform-channel-handle=1552 --field-trial-handle=1224,i,12011714025456671909,12354573716671871461,131072 /prefetch:8
            2⤵
              PID:1056
            • 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=utility --mojo-platform-channel-handle=1640 --field-trial-handle=1224,i,12011714025456671909,12354573716671871461,131072 /prefetch:8
              2⤵
                PID:1744
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2216 --field-trial-handle=1224,i,12011714025456671909,12354573716671871461,131072 /prefetch:1
                2⤵
                  PID:2304
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2244 --field-trial-handle=1224,i,12011714025456671909,12354573716671871461,131072 /prefetch:1
                  2⤵
                    PID:2520
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1436 --field-trial-handle=1224,i,12011714025456671909,12354573716671871461,131072 /prefetch:2
                    2⤵
                      PID:3036
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=1480 --field-trial-handle=1224,i,12011714025456671909,12354573716671871461,131072 /prefetch:1
                      2⤵
                        PID:1348
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3668 --field-trial-handle=1224,i,12011714025456671909,12354573716671871461,131072 /prefetch:8
                        2⤵
                          PID:2780
                      • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                        "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                        1⤵
                          PID:1784

                        Network

                        MITRE ATT&CK Enterprise v15

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GCM Store\Encryption\000006.dbtmp

                          Filesize

                          16B

                          MD5

                          aefd77f47fb84fae5ea194496b44c67a

                          SHA1

                          dcfbb6a5b8d05662c4858664f81693bb7f803b82

                          SHA256

                          4166bf17b2da789b0d0cc5c74203041d98005f5d4ef88c27e8281e00148cd611

                          SHA512

                          b733d502138821948267a8b27401d7c0751e590e1298fda1428e663ccd02f55d0d2446ff4bc265bdcdc61f952d13c01524a5341bc86afc3c2cde1d8589b2e1c3

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

                          Filesize

                          264KB

                          MD5

                          f50f89a0a91564d0b8a211f8921aa7de

                          SHA1

                          112403a17dd69d5b9018b8cede023cb3b54eab7d

                          SHA256

                          b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                          SHA512

                          bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

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

                          Filesize

                          5KB

                          MD5

                          69f79fa3fdddfb4ef484bf0549e703fc

                          SHA1

                          cd270bd6f0b874a1a1c114a0f295e02d54059441

                          SHA256

                          13479c583b182ef3d0a9e01cfc9e774430b7228d417c22de4a811139023447b4

                          SHA512

                          09d86269c1588f79c42526eacee95261e8ea814749a315919b4829119c688732c42636243bd01472fabb811d64e3b2e30891b301fd753212a848f25ed497354d

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

                          Filesize

                          5KB

                          MD5

                          33268d8dd1667d15c55bc466221c484f

                          SHA1

                          287f2a0d6336b2726276acabc989f045c0791cf2

                          SHA256

                          4240f090012902c690788e386be41dc2a57319cea9162d16ee6dbdc2af280822

                          SHA512

                          6d1b3136a3abb0836e74c3ea863be401f1290d9ac3640fb061754bed0e42db38d23fac4146b670aaaa3c137bd765d0db6dd24d6b4801dbae0f1e0dcd1bdd612d

                        • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\CURRENT

                          Filesize

                          16B

                          MD5

                          18e723571b00fb1694a3bad6c78e4054

                          SHA1

                          afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                          SHA256

                          8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                          SHA512

                          43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

                          Filesize

                          3.1MB

                          MD5

                          6f2f7543e46ca0cd1eecf947d68b0ec8

                          SHA1

                          7cf099fee562af351bebcea654e660fb05a5e736

                          SHA256

                          4d9417d9d1f8779020682a3882dc72979a504ea9b71ef51b37084556aa0d7205

                          SHA512

                          5851ea5dc7f9160256fb28fb89784fbbe40e244b55f083175382464eafa6c39d8b0c88aead34812c7c9f1abb6ccc1db84f65d379b4e1e6b65f65dc1a1902117c

                        • memory/2096-9-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2096-0-0x000007FEF6063000-0x000007FEF6064000-memory.dmp

                          Filesize

                          4KB

                        • memory/2096-2-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2096-1-0x0000000000060000-0x0000000000384000-memory.dmp

                          Filesize

                          3.1MB

                        • memory/2188-11-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2188-10-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2188-8-0x0000000000380000-0x00000000006A4000-memory.dmp

                          Filesize

                          3.1MB

                        • memory/2188-53-0x000007FEF6060000-0x000007FEF6A4C000-memory.dmp

                          Filesize

                          9.9MB