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Resubmissions

07/08/2024, 00:14

240807-ajameavelq 10

07/08/2024, 00:10

240807-agetcaycqd 10

Analysis

  • max time kernel
    63s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    07/08/2024, 00:10

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:1700
    • 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:2296
    • 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:2436
      • 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:2444
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2324
    • 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:2676
      • 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,0x7feef7d9758,0x7feef7d9768,0x7feef7d9778
        2⤵
          PID:2708
        • 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=1140 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:2
          2⤵
            PID:3008
          • 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=1420 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:8
            2⤵
              PID:2928
            • 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=1588 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:8
              2⤵
                PID:2004
              • 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=2040 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:1
                2⤵
                  PID:1000
                • 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=2300 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:1
                  2⤵
                    PID:2576
                  • 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=1824 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:2
                    2⤵
                      PID:1592
                    • 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=3240 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:1
                      2⤵
                        PID:2556
                      • 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=3644 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:8
                        2⤵
                          PID:776
                        • 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=10 --mojo-platform-channel-handle=1484 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:1
                          2⤵
                            PID:2744
                          • 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=11 --mojo-platform-channel-handle=3496 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:1
                            2⤵
                              PID:2100
                            • 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=12 --mojo-platform-channel-handle=2604 --field-trial-handle=1364,i,17956467382355669551,5115583453170961079,131072 /prefetch:1
                              2⤵
                                PID:2612
                            • 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:1632

                              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\Network\Network Persistent State

                                Filesize

                                633B

                                MD5

                                4e0fcd55d4524ae1d7bf608dd237cae0

                                SHA1

                                3043ccd75f2ba093cc2d5bcb531e305a7268881f

                                SHA256

                                cf297d908b06b77a8bff2cd55442dbd76d496a656583c1b2bb3391518ab52fc3

                                SHA512

                                7d579f4ecf7488177e929937917490e8cee71ed7a9dddd3876b24efb29424689252bbb3ee3aff4f26ba838d8346b7d56142deec330483b23c04f019a9d578907

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

                                Filesize

                                5KB

                                MD5

                                d511210cfc62289ec2bccdbed9a77bf3

                                SHA1

                                e1c4cd6cd93feab84be84d5283448e38511dea31

                                SHA256

                                b3229991e727f79f71f00452fb3e9c55e583db25f814696720b9bc37cc29b04d

                                SHA512

                                96de7854512e218165d22d9519733425efcbef995d48f3cd7bfea0bc1a3551602dcd8343490e828c2c39bd3741bcc3187a2ee4640056ff30ae7a6cde6f114b59

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

                                Filesize

                                5KB

                                MD5

                                3e677139388b2c2ff04f45899fac2069

                                SHA1

                                e06c2d6a05beb6e41c8fe16d8ba5fa361f577fbd

                                SHA256

                                11d5fa4484f6c037e8fbc3c3e7ed73c18e90d72a64328792eb24578a5f3df0bb

                                SHA512

                                5e419368018e5df67abcd01e40ac934c0f0e1912433ab2f83cbaa4f98ee043ea2a280cb17796945546020f78a6420813b339466911e3f3eefb7cab9d81532e93

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

                                Filesize

                                5KB

                                MD5

                                fb01a2844560ba3e18cbf4cc40c1689b

                                SHA1

                                af8ac9c018a7da7fe69d1640f5d724734986df9b

                                SHA256

                                78319823896026380f959e37dc14b917fc26202080ee23f82513bd03d7ea23c0

                                SHA512

                                08c8e2b997f682dd36d832d8610bcba8afd93fae9eb9700077fa521ad317b4784afc6ddc31a286e29d049d8fc25ef76c8d91774eb73bcdfa006667e69038e157

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp

                                Filesize

                                16B

                                MD5

                                18e723571b00fb1694a3bad6c78e4054

                                SHA1

                                afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                                SHA256

                                8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                                SHA512

                                43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

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

                                Filesize

                                310KB

                                MD5

                                6d2a74f516df71f5f6ab37ca2d67d62c

                                SHA1

                                1586dc6bbc687d4c5659db2813fb6972ccb49293

                                SHA256

                                0d12d854b13d54c55a3290e3caac7b450583a861e13f012fbd853078e9e88caa

                                SHA512

                                fff5b22558bd67c76ba121b88f030760baca1144e28881553eca3045d8496ba871346229fb1f23b212b7a07398d58d9c4f32a39dd60f708181be9a00c89dc48f

                              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\c064666d-a7af-40b7-aaf6-6f1d4e0d65e4.tmp

                                Filesize

                                310KB

                                MD5

                                4f66317cf9d8d015351286e098d4bae0

                                SHA1

                                1583b4c64d2c52a2477a18d697922861283806b1

                                SHA256

                                a64777843d9cf9071edac21016cd4dd17aaa1f9829b6f5af225ebe0b55c56591

                                SHA512

                                7725b0f9831af1b4a6991ce2823e69286cc7b499d221102a3bc6a1a63b6870d23efa3f538c52dc41e643026817e6a2d4fd04ad5ab4ba57b6bf60f01ffb4f8cd6

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

                                Filesize

                                3.1MB

                                MD5

                                6f2f7543e46ca0cd1eecf947d68b0ec8

                                SHA1

                                7cf099fee562af351bebcea654e660fb05a5e736

                                SHA256

                                4d9417d9d1f8779020682a3882dc72979a504ea9b71ef51b37084556aa0d7205

                                SHA512

                                5851ea5dc7f9160256fb28fb89784fbbe40e244b55f083175382464eafa6c39d8b0c88aead34812c7c9f1abb6ccc1db84f65d379b4e1e6b65f65dc1a1902117c

                              • memory/1700-0-0x000007FEF56C3000-0x000007FEF56C4000-memory.dmp

                                Filesize

                                4KB

                              • memory/1700-9-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

                                Filesize

                                9.9MB

                              • memory/1700-2-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

                                Filesize

                                9.9MB

                              • memory/1700-1-0x00000000001D0000-0x00000000004F4000-memory.dmp

                                Filesize

                                3.1MB

                              • memory/2436-62-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

                                Filesize

                                9.9MB

                              • memory/2436-11-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

                                Filesize

                                9.9MB

                              • memory/2436-10-0x0000000000240000-0x0000000000564000-memory.dmp

                                Filesize

                                3.1MB

                              • memory/2436-8-0x000007FEF56C0000-0x000007FEF60AC000-memory.dmp

                                Filesize

                                9.9MB