Analysis

  • max time kernel
    1345s
  • max time network
    1176s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240412-en
  • resource tags

    arch:x64arch:x86image:win11-20240412-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    13/04/2024, 02:05

General

  • Target
    Silver Rat/Loader.exe
  • Size 490KB
  • Sample240413-chtp1aab79
  • SHA256 f5f14b9073f86da926a8ed319b3289b893442414d1511e45177f6915fb4e5478
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10

Malware Config

Signatures

  • Executes dropped EXE 4 IoCs
  • Program crash 2 IoCs
  • Checks processor information in registry 2 TTPs 10 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies registry class 1 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 3 IoCs
  • Suspicious use of SetWindowsHookEx 13 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\Silver Rat\Loader.exe
    "C:\Users\Admin\AppData\Local\Temp\Silver Rat\Loader.exe"
    1⤵
      PID:2876
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe"
      1⤵
      • Suspicious use of WriteProcessMemory
      PID:4584
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe"
        2⤵
        • Checks processor information in registry
        • Modifies registry class
        • NTFS ADS
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2096
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2096.0.2145052087\640182259" -parentBuildID 20230214051806 -prefsHandle 1788 -prefMapHandle 1776 -prefsLen 22074 -prefMapSize 235121 -appDir "C:\Program Files\Mozilla Firefox\browser" - {a84fb52a-fc5a-4009-8116-2fdda5c5ea99} 2096 "\\.\pipe\gecko-crash-server-pipe.2096" 1880 21beae24c58 gpu
          3⤵
            PID:3176
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2096.1.1041433781\1660664923" -parentBuildID 20230214051806 -prefsHandle 2376 -prefMapHandle 2364 -prefsLen 22110 -prefMapSize 235121 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {0ab100ec-6c09-4fe5-a221-426c61baf6ba} 2096 "\\.\pipe\gecko-crash-server-pipe.2096" 2404 21bde187258 socket
            3⤵
            • Checks processor information in registry
            PID:3068
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2096.2.1759952717\7683329" -childID 1 -isForBrowser -prefsHandle 2628 -prefMapHandle 2816 -prefsLen 22148 -prefMapSize 235121 -jsInitHandle 1372 -jsInitLen 246560 -a11yResourceId 64 -parentBuildID 20230214051806 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {33f3e4d6-9503-4bbe-9edd-39a6f285d237} 2096 "\\.\pipe\gecko-crash-server-pipe.2096" 2804 21bedbe0258 tab
            3⤵
              PID:3904
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2096.3.1778858532\1343224983" -childID 2 -isForBrowser -prefsHandle 2596 -prefMapHandle 1632 -prefsLen 27614 -prefMapSize 235121 -jsInitHandle 1372 -jsInitLen 246560 -a11yResourceId 64 -parentBuildID 20230214051806 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {af517917-d793-4114-b374-9d2d408df363} 2096 "\\.\pipe\gecko-crash-server-pipe.2096" 3436 21bf0470258 tab
              3⤵
                PID:3556
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2096.4.1817351246\1551165744" -childID 3 -isForBrowser -prefsHandle 5052 -prefMapHandle 4960 -prefsLen 27614 -prefMapSize 235121 -jsInitHandle 1372 -jsInitLen 246560 -a11yResourceId 64 -parentBuildID 20230214051806 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {bea029a4-c3f3-4103-b224-04a20b2cb3f4} 2096 "\\.\pipe\gecko-crash-server-pipe.2096" 5064 21bf1df8558 tab
                3⤵
                  PID:3596
                • C:\Program Files\Mozilla Firefox\firefox.exe
                  "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2096.5.192558974\936675166" -childID 4 -isForBrowser -prefsHandle 5300 -prefMapHandle 5296 -prefsLen 27614 -prefMapSize 235121 -jsInitHandle 1372 -jsInitLen 246560 -a11yResourceId 64 -parentBuildID 20230214051806 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {8b440ba4-efe2-4126-a7cb-a52def6509c4} 2096 "\\.\pipe\gecko-crash-server-pipe.2096" 5224 21bf266cf58 tab
                  3⤵
                    PID:4856
                  • C:\Program Files\Mozilla Firefox\firefox.exe
                    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2096.6.12328228\1991631313" -childID 5 -isForBrowser -prefsHandle 5480 -prefMapHandle 5476 -prefsLen 27614 -prefMapSize 235121 -jsInitHandle 1372 -jsInitLen 246560 -a11yResourceId 64 -parentBuildID 20230214051806 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {ba456dd0-93af-468e-924f-11e304ccccf6} 2096 "\\.\pipe\gecko-crash-server-pipe.2096" 5396 21bf266a558 tab
                    3⤵
                      PID:5104
                    • C:\Program Files\Mozilla Firefox\firefox.exe
                      "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel="2096.7.124211355\802831872" -childID 6 -isForBrowser -prefsHandle 2920 -prefMapHandle 2916 -prefsLen 27774 -prefMapSize 235121 -jsInitHandle 1372 -jsInitLen 246560 -a11yResourceId 64 -parentBuildID 20230214051806 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {0fe7f4e0-85cf-4ffe-857b-1cfd564b84ff} 2096 "\\.\pipe\gecko-crash-server-pipe.2096" 3404 21bf31a2958 tab
                      3⤵
                        PID:4784
                  • C:\Windows\System32\rundll32.exe
                    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                    1⤵
                      PID:336
                    • C:\Users\Admin\Downloads\Silver Rat\Silver Rat\Loader.exe
                      "C:\Users\Admin\Downloads\Silver Rat\Silver Rat\Loader.exe"
                      1⤵
                        PID:4656
                      • C:\Users\Admin\Downloads\Silver Rat\Silver Rat\SilverRat.exe
                        "C:\Users\Admin\Downloads\Silver Rat\Silver Rat\SilverRat.exe"
                        1⤵
                          PID:1348
                          • C:\Users\Admin\AppData\Local\Temp\Loader.exe
                            "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
                            2⤵
                            • Executes dropped EXE
                            PID:1232
                          • C:\Users\Admin\AppData\Local\Temp\SilverRat.exe
                            "C:\Users\Admin\AppData\Local\Temp\SilverRat.exe"
                            2⤵
                            • Executes dropped EXE
                            PID:2384
                            • C:\Windows\SysWOW64\WerFault.exe
                              C:\Windows\SysWOW64\WerFault.exe -u -p 2384 -s 896
                              3⤵
                              • Program crash
                              PID:4676
                        • C:\Windows\SysWOW64\WerFault.exe
                          C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2384 -ip 2384
                          1⤵
                            PID:4020
                          • C:\Users\Admin\Downloads\Silver Rat\Silver Rat\SilverRat.exe
                            "C:\Users\Admin\Downloads\Silver Rat\Silver Rat\SilverRat.exe"
                            1⤵
                              PID:3256
                              • C:\Users\Admin\AppData\Local\Temp\Loader.exe
                                "C:\Users\Admin\AppData\Local\Temp\Loader.exe"
                                2⤵
                                • Executes dropped EXE
                                PID:3144
                              • C:\Users\Admin\AppData\Local\Temp\SilverRat.exe
                                "C:\Users\Admin\AppData\Local\Temp\SilverRat.exe"
                                2⤵
                                • Executes dropped EXE
                                PID:3940
                                • C:\Windows\SysWOW64\WerFault.exe
                                  C:\Windows\SysWOW64\WerFault.exe -u -p 3940 -s 864
                                  3⤵
                                  • Program crash
                                  PID:5576
                            • C:\Windows\SysWOW64\WerFault.exe
                              C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 3940 -ip 3940
                              1⤵
                                PID:5020
                              • C:\Users\Admin\Downloads\Silver Rat\Silver Rat\Loader.exe
                                "C:\Users\Admin\Downloads\Silver Rat\Silver Rat\Loader.exe"
                                1⤵
                                  PID:1944

                                Network

                                      MITRE ATT&CK Enterprise v15

                                      Replay Monitor

                                      Loading Replay Monitor...

                                      Downloads

                                      activity-stream.discovery_stream.json.tmp

                                      • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\activity-stream.discovery_stream.json.tmp
                                      • Size 24KB
                                      • SHA256 76b44948b430dec32526e84285643a1fa173e77c70c24ff42479f7c29e302608
                                      • MD5 SHA1 SHA512 SSDEEP

                                      activity-stream.discovery_stream.json.tmp

                                      • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\activity-stream.discovery_stream.json.tmp
                                      • Size 24KB
                                      • SHA256 168aebff993a279eeea2c7c16405c5a9461de67917669fa686229c31ce2da578
                                      • MD5 SHA1 SHA512 SSDEEP

                                      C72D4296C2EBC6FD41A9F780CD0C8F30F0FF937C

                                      • Path C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\cache2\entries\C72D4296C2EBC6FD41A9F780CD0C8F30F0FF937C
                                      • Size 13KB
                                      • SHA256 2112d7cb4d4751d15dd8ae5cd3d5e3338c76b999a964b0afb40adf69a96c2cb1
                                      • MD5 SHA1 SHA512 SSDEEP

                                      Loader.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\Loader.exe
                                      • Size 490KB
                                      • SHA256 f5f14b9073f86da926a8ed319b3289b893442414d1511e45177f6915fb4e5478
                                      • MD5 SHA1 SHA512 SSDEEP

                                      SilverRat.exe

                                      • Path C:\Users\Admin\AppData\Local\Temp\SilverRat.exe
                                      • Size 25.2MB
                                      • SHA256 79a4605d24d32f992d8e144202e980bb6b52bf8c9925b1498a1da59e50ac51f9
                                      • MD5 SHA1 SHA512 SSDEEP

                                      tmpaddon

                                      • Path C:\Users\Admin\AppData\Local\Temp\tmpaddon
                                      • Size 442KB
                                      • SHA256 a9f4281f82b3579581c389e8583dc9f477c7fd0e20c9dfc91a2e611e21e3407e
                                      • MD5 SHA1 SHA512 SSDEEP

                                      tmpaddon-1

                                      • Path C:\Users\Admin\AppData\Local\Temp\tmpaddon-1
                                      • Size 8.0MB
                                      • SHA256 345d44e3aa3e1967d186a43d732c8051235c43458169a5d7d371780a6475ee42
                                      • MD5 SHA1 SHA512 SSDEEP

                                      gmpopenh264.dll

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\gmp-gmpopenh264\1.8.1.2\gmpopenh264.dll
                                      • Size 997KB
                                      • SHA256 1ed7877024be63a049da98733fd282c16bd620530a4fb580dacec3a78ace914e
                                      • MD5 SHA1 SHA512 SSDEEP

                                      gmpopenh264.info

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\gmp-gmpopenh264\1.8.1.2\gmpopenh264.info
                                      • Size 116B
                                      • SHA256 f526e9f98841d987606efeaff7f3e017ba9fd516c4be83890c7f9a093ea4c47b
                                      • MD5 SHA1 SHA512

                                      LICENSE.txt

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\gmp-widevinecdm\4.10.2557.0\LICENSE.txt
                                      • Size 479B
                                      • SHA256 2af127b4e00f7303de8271996c0c681063e4dc7abdc7b2a8c3fe5932b9352539
                                      • MD5 SHA1 SHA512

                                      manifest.json

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\gmp-widevinecdm\4.10.2557.0\manifest.json
                                      • Size 372B
                                      • SHA256 e92d3394635edfb987a7528e0ccd24360e07a299078df2a6967ca3aae22fa2dd
                                      • MD5 SHA1 SHA512

                                      widevinecdm.dll

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\gmp-widevinecdm\4.10.2557.0\widevinecdm.dll
                                      • Size 11.8MB
                                      • SHA256 8ee42d9258e20bbc5bfdfae61605429beb5421ffeaaa0d02b86d4978f4b4ac4e
                                      • MD5 SHA1 SHA512 SSDEEP

                                      widevinecdm.dll.lib

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\gmp-widevinecdm\4.10.2557.0\widevinecdm.dll.lib
                                      • Size 1KB
                                      • SHA256 33899a3ebc22cb8ed8de7bd48c1c29486c0279b06d7ef98241c92aef4e3b9237
                                      • MD5 SHA1 SHA512

                                      widevinecdm.dll.sig

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\gmp-widevinecdm\4.10.2557.0\widevinecdm.dll.sig
                                      • Size 1KB
                                      • SHA256 68a03f075db104f84afdd8fca45a7e4bff7b55dc1a2a24272b3abe16d8759c81
                                      • MD5 SHA1 SHA512

                                      prefs-1.js

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\prefs-1.js
                                      • Size 8KB
                                      • SHA256 2ebf18981efe4f44ae76b059ec648fafeb27bfa07cd233ab47a442408b54f44b
                                      • MD5 SHA1 SHA512 SSDEEP

                                      prefs-1.js

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\prefs-1.js
                                      • Size 10KB
                                      • SHA256 3f9601e5a938c8ed683b339c4de7e14ca574fd4441e15cd7fafd865031635af1
                                      • MD5 SHA1 SHA512 SSDEEP

                                      prefs-1.js

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\prefs-1.js
                                      • Size 6KB
                                      • SHA256 0fb68acdbab583dfa52fc79bb9b5981ed14d761fe7f938238d0b7b97039ccae7
                                      • MD5 SHA1 SHA512 SSDEEP

                                      prefs-1.js

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\prefs-1.js
                                      • Size 7KB
                                      • SHA256 ca203f0d3d9df4cc6a85c412320ed37a342c2493828a2efb01c842a15c586830
                                      • MD5 SHA1 SHA512 SSDEEP

                                      recovery.jsonlz4

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\sessionstore-backups\recovery.jsonlz4
                                      • Size 1KB
                                      • SHA256 0458d0a951d583301e60052b004aa6e939402e7bb1347e281eec7b442f36b6cd
                                      • MD5 SHA1 SHA512

                                      recovery.jsonlz4

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\sessionstore-backups\recovery.jsonlz4
                                      • Size 1KB
                                      • SHA256 f9c7df6a68412b193039df01670766e910197525ad783b07a8c0aef3b2435e43
                                      • MD5 SHA1 SHA512

                                      recovery.jsonlz4

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\sessionstore-backups\recovery.jsonlz4
                                      • Size 5KB
                                      • SHA256 e529cbf4105e2d91f62e4a6d125a0da3411b162cc9e94ad5e7e78dd4982c46c2
                                      • MD5 SHA1 SHA512 SSDEEP

                                      sessionstore.jsonlz4

                                      • Path C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\jn4l3e2t.default-release\sessionstore.jsonlz4
                                      • Size 5KB
                                      • SHA256 39b00faedaba54c005496d3f03147c5aa222e23f3ab9026b4741f6665b9d5206
                                      • MD5 SHA1 SHA512 SSDEEP

                                      Silver Rat.3P00_eKg.zip.part

                                      • Path C:\Users\Admin\Downloads\Silver Rat.3P00_eKg.zip.part
                                      • Size 16KB
                                      • SHA256 d82a000ba97ab59bb304c0983b574e503344e7553595c6e49a180f1f70236445
                                      • MD5 SHA1 SHA512 SSDEEP

                                      memory/1232-211-0x0000000000B50000-0x0000000000B51000-memory.dmp

                                      memory/1232-206-0x0000000000A50000-0x0000000000A9B000-memory.dmp

                                      memory/1232-228-0x0000000000A50000-0x0000000000A9B000-memory.dmp

                                      memory/1348-222-0x0000000000400000-0x0000000001DB0000-memory.dmp

                                      memory/1944-2240-0x0000000000C30000-0x0000000000C7B000-memory.dmp

                                      memory/1944-2245-0x0000000000C30000-0x0000000000C7B000-memory.dmp

                                      memory/2384-227-0x0000000006FA0000-0x0000000007032000-memory.dmp

                                      memory/2384-224-0x0000000073660000-0x0000000073E11000-memory.dmp

                                      memory/2384-229-0x0000000073660000-0x0000000073E11000-memory.dmp

                                      memory/2384-226-0x00000000074B0000-0x0000000007A56000-memory.dmp

                                      memory/2384-225-0x0000000000C30000-0x000000000255E000-memory.dmp

                                      memory/2876-9-0x0000000000920000-0x000000000096B000-memory.dmp

                                      memory/2876-8-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

                                      memory/2876-6-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

                                      memory/2876-7-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

                                      memory/2876-0-0x0000000000920000-0x000000000096B000-memory.dmp

                                      memory/2876-5-0x0000000000AE0000-0x0000000000AE1000-memory.dmp

                                      memory/3144-1520-0x0000000002C50000-0x0000000002C90000-memory.dmp

                                      memory/3144-1476-0x0000000002DF0000-0x0000000002EF0000-memory.dmp

                                      memory/3144-1501-0x0000000002C50000-0x0000000002C90000-memory.dmp

                                      memory/3144-988-0x00000000010D0000-0x000000000111B000-memory.dmp

                                      memory/3144-1544-0x0000000002C50000-0x0000000002C90000-memory.dmp

                                      memory/3144-1569-0x0000000002C50000-0x0000000002C90000-memory.dmp

                                      memory/3144-1518-0x0000000002C50000-0x0000000002C90000-memory.dmp

                                      memory/3144-1931-0x00000000010D0000-0x000000000111B000-memory.dmp

                                      memory/3256-1010-0x0000000000400000-0x0000000001DB0000-memory.dmp

                                      memory/3940-1746-0x0000000073B80000-0x0000000074331000-memory.dmp

                                      memory/3940-1253-0x0000000073B80000-0x0000000074331000-memory.dmp

                                      memory/4656-191-0x0000000000B00000-0x0000000000B4B000-memory.dmp

                                      memory/4656-196-0x0000000000B50000-0x0000000000B51000-memory.dmp

                                      memory/4656-197-0x0000000000B00000-0x0000000000B4B000-memory.dmp