Analysis

  • max time kernel
    140s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-12-2024 07:26

General

  • Target

    Client-built.exe

  • Size

    348KB

  • MD5

    e8ecdeb99f70e49718a4fc9986f86df3

  • SHA1

    4f50bde0200a60dfe74a957a4f927e5648e2e78f

  • SHA256

    d0030ab6b4ed701eca6cad94f123517f564edb6a17ca33cbe6415cea10ac1401

  • SHA512

    f04bbab81c20eb22315914d20fa3d34761e0821592189b12c8821b311a3056f9c767bfc57eb41403c55a5eeb0cef50575686c1766ccfb164c5bb1892637c37ba

  • SSDEEP

    6144:SRNHXf500Mr7ULWRbNlPyDg+Rve9cc6i0pzci:Kd50xUxs+RWGcdOzci

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Test

C2

5.tcp.eu.ngrok.io:13432

5.tcp.eu.ngrok.io:8080

Mutex

QSR_MUTEX_zDi3X3iiANcUc0nFPZ

Attributes
  • encryption_key

    10b0G4xQi1VrldATZzJ7

  • install_name

    win.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Runtime

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 2 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • 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 4 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 26 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Drops file in System32 directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1808
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "Windows Runtime" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\Client-built.exe" /rl HIGHEST /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3856
    • C:\Windows\SysWOW64\SubDir\win.exe
      "C:\Windows\SysWOW64\SubDir\win.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1248
      • C:\Windows\SysWOW64\schtasks.exe
        "schtasks" /create /tn "Windows Runtime" /sc ONLOGON /tr "C:\Windows\SysWOW64\SubDir\win.exe" /rl HIGHEST /f
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2724
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument http://roblox.com/
        3⤵
        • Enumerates system info in registry
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:4260
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0xfc,0x100,0x104,0xd8,0x108,0x7ff99d6d46f8,0x7ff99d6d4708,0x7ff99d6d4718
          4⤵
            PID:1152
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2104,2686988981210773890,1083549742630654680,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2128 /prefetch:2
            4⤵
              PID:2408
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2104,2686988981210773890,1083549742630654680,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2184 /prefetch:3
              4⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:1380
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2104,2686988981210773890,1083549742630654680,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2820 /prefetch:8
              4⤵
                PID:2156
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2104,2686988981210773890,1083549742630654680,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3312 /prefetch:1
                4⤵
                  PID:5036
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2104,2686988981210773890,1083549742630654680,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3340 /prefetch:1
                  4⤵
                    PID:2076
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2104,2686988981210773890,1083549742630654680,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5068 /prefetch:1
                    4⤵
                      PID:3248
              • C:\Windows\System32\CompPkgSrv.exe
                C:\Windows\System32\CompPkgSrv.exe -Embedding
                1⤵
                  PID:1540
                • C:\Windows\System32\CompPkgSrv.exe
                  C:\Windows\System32\CompPkgSrv.exe -Embedding
                  1⤵
                    PID:1916

                  Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                    Filesize

                    152B

                    MD5

                    c2d9eeb3fdd75834f0ac3f9767de8d6f

                    SHA1

                    4d16a7e82190f8490a00008bd53d85fb92e379b0

                    SHA256

                    1e5efb5f1d78a4cc269cb116307e9d767fc5ad8a18e6cf95c81c61d7b1da5c66

                    SHA512

                    d92f995f9e096ecc0a7b8b4aca336aeef0e7b919fe7fe008169f0b87da84d018971ba5728141557d42a0fc562a25191bd85e0d7354c401b09e8b62cdc44b6dcd

                  • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                    Filesize

                    152B

                    MD5

                    e55832d7cd7e868a2c087c4c73678018

                    SHA1

                    ed7a2f6d6437e907218ffba9128802eaf414a0eb

                    SHA256

                    a4d7777b980ec53de3a70aca8fb25b77e9b53187e7d2f0fa1a729ee9a35da574

                    SHA512

                    897fdebf1a9269a1bf1e3a791f6ee9ab7c24c9d75eeff65ac9599764e1c8585784e1837ba5321d90af0b004af121b2206081a6fb1b1ad571a0051ee33d3f5c5f

                  • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Code Cache\js\index-dir\the-real-index

                    Filesize

                    1KB

                    MD5

                    95540a34edde8351648cc4bbda8067ca

                    SHA1

                    4431503911a8eda5507e8116bf2182fe511d7020

                    SHA256

                    5c4473c8debf6bc6e30eb274fac22995a7b7f3b93afc963ad9123d7d851783d9

                    SHA512

                    e1fa872e16b76bc2f3f07dbc014ee31aebac54cc0b9bd0687329f220939e86c6c88565062577911be41590c1434ecf56644e4d894bbcbbb5a2fe0ee2dd6f2b22

                  • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network Persistent State

                    Filesize

                    617B

                    MD5

                    9fadc259833f7c12f7951a52657d5cd7

                    SHA1

                    45328d35b185d50084b1f33315f3ae5b60ef612a

                    SHA256

                    1f56cffe330aa4d6eea2afbcd4c83e8fa64017e27eeb4e680d0636fc5cb0b6c1

                    SHA512

                    3a1f932be5474399009e3626d7f934a1633ab65a47ca2b969bc4a3cd561aa86efad887cc7db3855e1caf74fc47653bce982b4a693055f8ad5bdb7d142a7dbd1c

                  • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                    Filesize

                    6KB

                    MD5

                    6cfecaecffb4ff9d0726eafa48189414

                    SHA1

                    6a7b41b53cb97e383c83c93d2def5f9076c004f2

                    SHA256

                    39cf8a6aba6f336d3ee8d242856451a74e98d603e7652e6a1944e807fdd2de4e

                    SHA512

                    3bd06648d1920197e61de0ee584a256868a467c1e10907121a7e20a284c398f3c0d1d943acc9f9b53699302d79fe4f0c65a3e41b4b5e2e18d4d1b34c0c32c49c

                  • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                    Filesize

                    5KB

                    MD5

                    c48667f5185486a44dbaadcef9c83544

                    SHA1

                    8452e3d1aa91203744bd570dd3c6a28d283b9f85

                    SHA256

                    35df252608ce27a2b8940464c6df4a551a02ec688a7c4addd75db84fa6323826

                    SHA512

                    d585a9dca837add244e038627b97c9b984ffbefe5feb12bdd8c50598eb00ef5c3e65b5da1f5bc143b3218756bdb1ce43cd8f5808267511d208c7eef1725fd18f

                  • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

                    Filesize

                    10KB

                    MD5

                    18ebec202f3317c455937ffb5a1179ad

                    SHA1

                    06e4652c2c814a273885975a91b092a2fad6cdc9

                    SHA256

                    1fa20eeda550b14de520e07518cc95ed1b04afa93bb8bedadd58649c24ccec2a

                    SHA512

                    e7423e9d25954781f0e46182cda527045d004720cd322efaa34af210a13755ff0dba04185ea8651048b1a42de4661fa4fade2cf65fafec036c4fb47756d6c8d8

                  • C:\Windows\SysWOW64\SubDir\win.exe

                    Filesize

                    348KB

                    MD5

                    e8ecdeb99f70e49718a4fc9986f86df3

                    SHA1

                    4f50bde0200a60dfe74a957a4f927e5648e2e78f

                    SHA256

                    d0030ab6b4ed701eca6cad94f123517f564edb6a17ca33cbe6415cea10ac1401

                    SHA512

                    f04bbab81c20eb22315914d20fa3d34761e0821592189b12c8821b311a3056f9c767bfc57eb41403c55a5eeb0cef50575686c1766ccfb164c5bb1892637c37ba

                  • memory/1248-18-0x00000000750F0000-0x00000000758A0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1248-14-0x00000000750F0000-0x00000000758A0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1248-15-0x00000000750F0000-0x00000000758A0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1248-17-0x0000000006E30000-0x0000000006E3A000-memory.dmp

                    Filesize

                    40KB

                  • memory/1808-5-0x0000000005720000-0x0000000005786000-memory.dmp

                    Filesize

                    408KB

                  • memory/1808-13-0x00000000750F0000-0x00000000758A0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1808-7-0x0000000006840000-0x000000000687C000-memory.dmp

                    Filesize

                    240KB

                  • memory/1808-6-0x0000000005B50000-0x0000000005B62000-memory.dmp

                    Filesize

                    72KB

                  • memory/1808-0-0x00000000750FE000-0x00000000750FF000-memory.dmp

                    Filesize

                    4KB

                  • memory/1808-4-0x00000000750F0000-0x00000000758A0000-memory.dmp

                    Filesize

                    7.7MB

                  • memory/1808-3-0x0000000005680000-0x0000000005712000-memory.dmp

                    Filesize

                    584KB

                  • memory/1808-2-0x0000000005B90000-0x0000000006134000-memory.dmp

                    Filesize

                    5.6MB

                  • memory/1808-1-0x0000000000B90000-0x0000000000BEE000-memory.dmp

                    Filesize

                    376KB