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Resubmissions

18/01/2025, 21:07

250118-zyrlxavjfz 10

18/01/2025, 20:55

250118-zqe8xatqb1 10

Analysis

  • max time kernel
    52s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20241023-en
  • resource tags

    arch:x64arch:x86image:win7-20241023-enlocale:en-usos:windows7-x64system
  • submitted
    18/01/2025, 20:55

General

  • Target

    RC7old.exe

  • Size

    3.1MB

  • MD5

    5efb08d03470612d11124136accc84fa

  • SHA1

    46abe602f6566ff6103f504ef8ae73f43eae19c1

  • SHA256

    853cf003dd01ec972a222a28b1e8b260fb06fab20245e609cb7df103d110343f

  • SHA512

    13a1fbeae357662e2e2a60e511a3bce2f63fef40a96ba49f25e745dd466ca3da24de5155f0f2233e8d15941f353a21df14247ab7b4ebf84ee419ca7d7b7ae74a

  • SSDEEP

    49152:CvHI22SsaNYfdPBldt698dBcjHuYREEf/yk/65LoGdvYAFTHHB72eh2NT:Cvo22SsaNYfdPBldt6+dBcjHuYRkp

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

RC7old

C2

yellow-parts.gl.at.ply.gg:52085

Mutex

8356bffd-2b62-44f9-937c-4adee31d9ea3

Attributes
  • encryption_key

    5471C1CD3CF5D10BA14E0A632D9E07BC5FEE0E2B

  • install_name

    RC7old.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    System

  • subdirectory

    System

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 62 IoCs
  • Suspicious use of FindShellTrayWindow 35 IoCs
  • Suspicious use of SendNotifyMessage 33 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\RC7old.exe
    "C:\Users\Admin\AppData\Local\Temp\RC7old.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2116
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Windows\system32\System\RC7old.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2620
    • C:\Windows\system32\System\RC7old.exe
      "C:\Windows\system32\System\RC7old.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:2416
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Windows\system32\System\RC7old.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2184
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2928
    • 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:2508
      • 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,0x7fef14d9758,0x7fef14d9768,0x7fef14d9778
        2⤵
          PID:2504
        • 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=1144 --field-trial-handle=1292,i,8236042750760945294,3039981657669365,131072 /prefetch:2
          2⤵
            PID:376
          • 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=1516 --field-trial-handle=1292,i,8236042750760945294,3039981657669365,131072 /prefetch:8
            2⤵
              PID:2988
            • 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=1608 --field-trial-handle=1292,i,8236042750760945294,3039981657669365,131072 /prefetch:8
              2⤵
                PID:704
              • 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=2248 --field-trial-handle=1292,i,8236042750760945294,3039981657669365,131072 /prefetch:1
                2⤵
                  PID:2448
                • 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=2284 --field-trial-handle=1292,i,8236042750760945294,3039981657669365,131072 /prefetch:1
                  2⤵
                    PID:2652
                  • 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=1476 --field-trial-handle=1292,i,8236042750760945294,3039981657669365,131072 /prefetch:2
                    2⤵
                      PID:868
                    • 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=2868 --field-trial-handle=1292,i,8236042750760945294,3039981657669365,131072 /prefetch:1
                      2⤵
                        PID:1256
                      • 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=1292,i,8236042750760945294,3039981657669365,131072 /prefetch:8
                        2⤵
                          PID:1796
                      • 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:2288

                        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

                          a410dd4ad2b304ea483aef9c436ae6e8

                          SHA1

                          b39408b11278c7a02ce612bdf8088c4dbb856d4c

                          SHA256

                          a05cef5e1735625e71d7aab7b3b0d9979f3b637334eb7ca56e59419e5836b0a4

                          SHA512

                          60b7cb75a01829d5b30e23ccaa755600cea8cadabac4235c59028f95b877331cff3e88a6d0a7f0229d1fc18556e40194f0044622beefa43d3389502d42b3f2c0

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

                          Filesize

                          5KB

                          MD5

                          04e4d98006597426a2f006b4e67489e1

                          SHA1

                          15caad8ae7000d4d3837503fa0cfd9e12f2be10e

                          SHA256

                          6298eb5e96b72bd185667a5506d590e20f975e16143734c4e11f5bba93a114d8

                          SHA512

                          23f72eb4aeb19ccac72e0cd1ed73c3cb899bbf48104217a9886fa00c8455e84cf2e085e17078ce1624dffe457e94157a539da710ee14496f1b5de6f6d655da9a

                        • 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:\Windows\system32\System\RC7old.exe

                          Filesize

                          3.1MB

                          MD5

                          5efb08d03470612d11124136accc84fa

                          SHA1

                          46abe602f6566ff6103f504ef8ae73f43eae19c1

                          SHA256

                          853cf003dd01ec972a222a28b1e8b260fb06fab20245e609cb7df103d110343f

                          SHA512

                          13a1fbeae357662e2e2a60e511a3bce2f63fef40a96ba49f25e745dd466ca3da24de5155f0f2233e8d15941f353a21df14247ab7b4ebf84ee419ca7d7b7ae74a

                        • memory/2116-11-0x000007FEF5F30000-0x000007FEF691C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2116-0-0x000007FEF5F33000-0x000007FEF5F34000-memory.dmp

                          Filesize

                          4KB

                        • memory/2116-2-0x000007FEF5F30000-0x000007FEF691C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2116-1-0x0000000001300000-0x0000000001624000-memory.dmp

                          Filesize

                          3.1MB

                        • memory/2416-12-0x000007FEF5F30000-0x000007FEF691C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2416-10-0x000007FEF5F30000-0x000007FEF691C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2416-9-0x000007FEF5F30000-0x000007FEF691C000-memory.dmp

                          Filesize

                          9.9MB

                        • memory/2416-8-0x0000000000820000-0x0000000000B44000-memory.dmp

                          Filesize

                          3.1MB