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Overview

overview

10

Static

static

10

RC7old.exe

windows7-x64

10

RC7old.exe

windows10-2004-x64

10

Resubmissions

18/01/2025, 21:07

250118-zyrlxavjfz 10

18/01/2025, 20:55

250118-zqe8xatqb1 10

Analysis

  • max time kernel
    194s
  • max time network
    200s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    18/01/2025, 21:07

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General

  • Target

    RC7old.exe

  • Size

    3.1MB

  • MD5

    5efb08d03470612d11124136accc84fa

  • SHA1

    46abe602f6566ff6103f504ef8ae73f43eae19c1

  • SHA256

    853cf003dd01ec972a222a28b1e8b260fb06fab20245e609cb7df103d110343f

  • SHA512

    13a1fbeae357662e2e2a60e511a3bce2f63fef40a96ba49f25e745dd466ca3da24de5155f0f2233e8d15941f353a21df14247ab7b4ebf84ee419ca7d7b7ae74a

  • SSDEEP

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

Score
10/10
quasarrc7oldspywaretrojan

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.

    trojanspywarequasar
  • Quasar family
    quasar
  • Quasar payload 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 9 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.

    persistence

Processes

  • 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=1 --renderer-client-id=6 --mojo-platform-channel-handle=2276 --field-trial-handle=1284,i,3200620142580441509,16898819340010944638,131072 /prefetch:1
    1⤵
      PID:1092
    • 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=1 --renderer-client-id=5 --mojo-platform-channel-handle=2284 --field-trial-handle=1284,i,3200620142580441509,16898819340010944638,131072 /prefetch:1
      1⤵
        PID:2752
      • 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:2808
        • 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:3036
          • 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:984
          • 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:2344
            • 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:2700
        • 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=1328 --field-trial-handle=1284,i,3200620142580441509,16898819340010944638,131072 /prefetch:2
          1⤵
            PID:2556
          • 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=1 --renderer-client-id=8 --mojo-platform-channel-handle=3316 --field-trial-handle=1284,i,3200620142580441509,16898819340010944638,131072 /prefetch:1
            1⤵
              PID:564
            • 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=3796 --field-trial-handle=1284,i,3200620142580441509,16898819340010944638,131072 /prefetch:8
              1⤵
                PID:768
              • C:\Windows\system32\taskmgr.exe
                "C:\Windows\system32\taskmgr.exe"
                1⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious behavior: GetForegroundWindowSpam
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of FindShellTrayWindow
                • Suspicious use of SendNotifyMessage
                PID:1828
              • 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=1 --renderer-client-id=10 --mojo-platform-channel-handle=2676 --field-trial-handle=1284,i,3200620142580441509,16898819340010944638,131072 /prefetch:1
                1⤵
                  PID:832
                • 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=2572 --field-trial-handle=1284,i,3200620142580441509,16898819340010944638,131072 /prefetch:8
                  1⤵
                    PID:1356
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=audio.mojom.AudioService --lang=en-US --service-sandbox-type=audio --mojo-platform-channel-handle=2268 --field-trial-handle=1284,i,3200620142580441509,16898819340010944638,131072 /prefetch:8
                    1⤵
                      PID:2324
                    • C:\Windows\system32\AUDIODG.EXE
                      C:\Windows\system32\AUDIODG.EXE 0x53c
                      1⤵
                      • Suspicious use of AdjustPrivilegeToken
                      PID:1720

                    Network

                    MITRE ATT&CK Enterprise v15

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                    Downloads

                    • C:\Windows\System32\System\RC7old.exe
                      Filesize

                      3.1MB

                      MD5

                      5efb08d03470612d11124136accc84fa

                      SHA1

                      46abe602f6566ff6103f504ef8ae73f43eae19c1

                      SHA256

                      853cf003dd01ec972a222a28b1e8b260fb06fab20245e609cb7df103d110343f

                      SHA512

                      13a1fbeae357662e2e2a60e511a3bce2f63fef40a96ba49f25e745dd466ca3da24de5155f0f2233e8d15941f353a21df14247ab7b4ebf84ee419ca7d7b7ae74a

                      Download Submit

                    • memory/1828-10-0x0000000140000000-0x00000001405E8000-memory.dmp

                      Filesize

                      5.9MB

                      Download

                    • memory/1828-11-0x0000000140000000-0x00000001405E8000-memory.dmp

                      Filesize

                      5.9MB

                      Download

                    • memory/1828-12-0x0000000140000000-0x00000001405E8000-memory.dmp

                      Filesize

                      5.9MB

                      Download

                    • memory/1828-13-0x0000000140000000-0x00000001405E8000-memory.dmp

                      Filesize

                      5.9MB

                      Download

                    • memory/1828-16-0x0000000140000000-0x00000001405E8000-memory.dmp

                      Filesize

                      5.9MB

                      Download

                    • memory/1828-17-0x0000000140000000-0x00000001405E8000-memory.dmp

                      Filesize

                      5.9MB

                      Download

                    • memory/1828-18-0x0000000140000000-0x00000001405E8000-memory.dmp

                      Filesize

                      5.9MB

                      Download

                    • memory/1828-19-0x0000000140000000-0x00000001405E8000-memory.dmp

                      Filesize

                      5.9MB

                      Download

                    • memory/2344-9-0x0000000000C50000-0x0000000000F74000-memory.dmp

                      Filesize

                      3.1MB

                      Download

                    • memory/3036-2-0x000007FEF49F0000-0x000007FEF53DC000-memory.dmp

                      Filesize

                      9.9MB

                      Download

                    • memory/3036-1-0x0000000000B40000-0x0000000000E64000-memory.dmp

                      Filesize

                      3.1MB

                      Download

                    • memory/3036-8-0x000007FEF49F0000-0x000007FEF53DC000-memory.dmp

                      Filesize

                      9.9MB

                      Download

                    • memory/3036-0-0x000007FEF49F3000-0x000007FEF49F4000-memory.dmp

                      Filesize

                      4KB

                      Download