Analysis

  • max time kernel
    138s
  • max time network
    179s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10-07-2024 17:18

General

  • Target

    cstealer.pyc

  • Size

    75KB

  • MD5

    44d80709f492610a377eafff857aa413

  • SHA1

    91e53c38437797bd7e0ae5bb45a3e03144c4ec21

  • SHA256

    2312b7c1b6704e66d44d44971fed7492d2fa9655009e3cc00c6a7a79e59d8c53

  • SHA512

    b3b42555de7648aa4a1d6dfc94ae0503964913af7baa9528b623e5f9991a560734d43b9c88608a3cca5f13c507debfd4711951230d2932933d981b7c0b31f0d0

  • SSDEEP

    1536:DvIiOtbI3vkwsJlYaa2Is8qRai+jjV6P4grrRheEX:DvQ29t2Is8HdgP4grrRnX

Score
3/10

Malware Config

Signatures

  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 14 IoCs

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

  • Modifies registry class 16 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 21 IoCs
  • Suspicious use of SendNotifyMessage 20 IoCs
  • Suspicious use of SetWindowsHookEx 21 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:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\cstealer.pyc
    1⤵
    • Modifies registry class
    PID:4500
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Modifies registry class
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:60
    • C:\Program Files\Mozilla Firefox\firefox.exe
      "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url "C:\Users\Admin\AppData\Local\Temp\cstealer.pyc"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1384
      • C:\Program Files\Mozilla Firefox\firefox.exe
        "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url C:\Users\Admin\AppData\Local\Temp\cstealer.pyc
        3⤵
        • Checks processor information in registry
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2340
        • C:\Program Files\Mozilla Firefox\firefox.exe
          "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel=2028 -parentBuildID 20240401114208 -prefsHandle 1956 -prefMapHandle 1948 -prefsLen 25755 -prefMapSize 244658 -appDir "C:\Program Files\Mozilla Firefox\browser" - {263665be-0bb8-441e-a4cf-0279c08017e2} 2340 "\\.\pipe\gecko-crash-server-pipe.2340" gpu
          4⤵
            PID:4124
          • C:\Program Files\Mozilla Firefox\firefox.exe
            "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel=2468 -parentBuildID 20240401114208 -prefsHandle 2388 -prefMapHandle 2328 -prefsLen 26675 -prefMapSize 244658 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {d6eb6bd7-df4b-432e-ac4c-1023e6227350} 2340 "\\.\pipe\gecko-crash-server-pipe.2340" socket
            4⤵
              PID:632
            • C:\Program Files\Mozilla Firefox\firefox.exe
              "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel=3324 -childID 1 -isForBrowser -prefsHandle 3056 -prefMapHandle 3296 -prefsLen 26816 -prefMapSize 244658 -jsInitHandle 960 -jsInitLen 234952 -parentBuildID 20240401114208 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {d8231007-a1a0-44a8-b8b0-0deef646215b} 2340 "\\.\pipe\gecko-crash-server-pipe.2340" tab
              4⤵
                PID:3612
              • C:\Program Files\Mozilla Firefox\firefox.exe
                "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel=3176 -childID 2 -isForBrowser -prefsHandle 3700 -prefMapHandle 2660 -prefsLen 31165 -prefMapSize 244658 -jsInitHandle 960 -jsInitLen 234952 -parentBuildID 20240401114208 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {04d61890-77a0-4a5e-9a5e-bc01ccf0f639} 2340 "\\.\pipe\gecko-crash-server-pipe.2340" tab
                4⤵
                  PID:1176
                • C:\Program Files\Mozilla Firefox\firefox.exe
                  "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel=5100 -parentBuildID 20240401114208 -sandboxingKind 0 -prefsHandle 5000 -prefMapHandle 5012 -prefsLen 29197 -prefMapSize 244658 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {7d97a194-ea89-4aed-bc65-a45e1955886f} 2340 "\\.\pipe\gecko-crash-server-pipe.2340" utility
                  4⤵
                  • Checks processor information in registry
                  PID:5132
                • C:\Program Files\Mozilla Firefox\firefox.exe
                  "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel=5300 -childID 3 -isForBrowser -prefsHandle 5332 -prefMapHandle 5336 -prefsLen 27051 -prefMapSize 244658 -jsInitHandle 960 -jsInitLen 234952 -parentBuildID 20240401114208 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {cfd95e43-8462-4a16-bcae-cba0124d1708} 2340 "\\.\pipe\gecko-crash-server-pipe.2340" tab
                  4⤵
                    PID:5452
                  • C:\Program Files\Mozilla Firefox\firefox.exe
                    "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel=5492 -childID 4 -isForBrowser -prefsHandle 5320 -prefMapHandle 5324 -prefsLen 27051 -prefMapSize 244658 -jsInitHandle 960 -jsInitLen 234952 -parentBuildID 20240401114208 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {79b66f2a-96a7-42b9-ad34-4cad24a73371} 2340 "\\.\pipe\gecko-crash-server-pipe.2340" tab
                    4⤵
                      PID:5464
                    • C:\Program Files\Mozilla Firefox\firefox.exe
                      "C:\Program Files\Mozilla Firefox\firefox.exe" -contentproc --channel=5656 -childID 5 -isForBrowser -prefsHandle 5668 -prefMapHandle 5672 -prefsLen 27051 -prefMapSize 244658 -jsInitHandle 960 -jsInitLen 234952 -parentBuildID 20240401114208 -win32kLockedDown -appDir "C:\Program Files\Mozilla Firefox\browser" - {82cf8afb-1ab9-4e70-a082-251fe5560dd9} 2340 "\\.\pipe\gecko-crash-server-pipe.2340" tab
                      4⤵
                        PID:5476
                • C:\Program Files\Mozilla Firefox\firefox.exe
                  "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url "C:\Users\Admin\Downloads\cstealer.pyc"
                  1⤵
                    PID:5860
                    • C:\Program Files\Mozilla Firefox\firefox.exe
                      "C:\Program Files\Mozilla Firefox\firefox.exe" -osint -url C:\Users\Admin\Downloads\cstealer.pyc
                      2⤵
                      • Checks processor information in registry
                      PID:5876
                  • C:\Windows\System32\rundll32.exe
                    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                    1⤵
                      PID:2564

                    Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

                    Loading Replay Monitor...

                    Downloads

                    • C:\Users\Admin\AppData\Local\Mozilla\Firefox\Profiles\zirruo9e.default-release\activity-stream.discovery_stream.json.tmp

                      Filesize

                      18KB

                      MD5

                      a8a8580b712420a1ae2ac968e65f085b

                      SHA1

                      2776b20f877f376a59191d92433d23dae1437dba

                      SHA256

                      ee2542957d75f66a8c47f3102a3afe414d49067f0dbbc9fa11928e5c7aa8628a

                      SHA512

                      0b380e7cf44f85650d2f657b1bb4a4b6eb592139819315650f9a46c6b3adedc3e90ff5020581106c6a7039306b578b38d8f1b87988512d84e70e9571ee4b2b70

                    • C:\Users\Admin\AppData\Local\Temp\tmpaddon

                      Filesize

                      479KB

                      MD5

                      09372174e83dbbf696ee732fd2e875bb

                      SHA1

                      ba360186ba650a769f9303f48b7200fb5eaccee1

                      SHA256

                      c32efac42faf4b9878fb8917c5e71d89ff40de580c4f52f62e11c6cfab55167f

                      SHA512

                      b667086ed49579592d435df2b486fe30ba1b62ddd169f19e700cd079239747dd3e20058c285fa9c10a533e34f22b5198ed9b1f92ae560a3067f3e3feacc724f1

                    • C:\Users\Admin\AppData\Local\Temp\tmpaddon-1

                      Filesize

                      13.8MB

                      MD5

                      0a8747a2ac9ac08ae9508f36c6d75692

                      SHA1

                      b287a96fd6cc12433adb42193dfe06111c38eaf0

                      SHA256

                      32d544baf2facc893057a1d97db33207e642f0dacf235d8500a0b5eff934ce03

                      SHA512

                      59521f8c61236641b3299ab460c58c8f5f26fa67e828de853c2cf372f9614d58b9f541aae325b1600ec4f3a47953caacb8122b0dfce7481acfec81045735947d

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\AlternateServices.bin

                      Filesize

                      8KB

                      MD5

                      9ced19ff6abc765eb7d7367943029854

                      SHA1

                      8369f4311ec18763dc6ae96f3ec166755ea2489d

                      SHA256

                      cdbf3a88566ede978dc984f093a8260cf992501b306d936ff17ebf16d73d790b

                      SHA512

                      a37b965905645daf54c27e49fd55f039dea146984f632f352d41b5ca31d8cecaeec848ee6b4660a651f6bae8687a5a991744ba35358fb5b1457b2b615fc85e4e

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\datareporting\glean\db\data.safe.tmp

                      Filesize

                      6KB

                      MD5

                      d906a25f1803e0344d2c6c724086b958

                      SHA1

                      b7344afec2ae67956388f7c45448870c34552a18

                      SHA256

                      bde873b0c4abf6f2d91ef4808fdd933f0fbd7fa2da94e04566e8fee0ea1c101d

                      SHA512

                      01853b46771a66855ae032926666f4caab2bf96a07e50e52c1ad3e3ff0f9b8dea01a4f3baa2710ed818d608f0d7e153b46d60c0933545bb556d575bc1c635251

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\datareporting\glean\db\data.safe.tmp

                      Filesize

                      22KB

                      MD5

                      2728c6696f8ca1c2e93871fd995cda01

                      SHA1

                      7c7cba260bfea62238f334477c6002d6df934cb5

                      SHA256

                      6d29b692b5023ba7999f9cea93c35394ef19fe339f2965eb15c339643f2add89

                      SHA512

                      2cdbb568ddb225d7e4367b3442e45c31401ebc4dbc5fda53e467c035a86f707a269e6c6306aaccf096ebaeaf27efb87f4eb9143022b9e9d692cfcc909a1f6548

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\datareporting\glean\db\data.safe.tmp

                      Filesize

                      5KB

                      MD5

                      02caf1463e5a1a1e9f6158b4d249680c

                      SHA1

                      22dcf57ef3f5530ecc3c819de9bcb5e0485e9c1f

                      SHA256

                      1a41ccf52bbbbd19bc15f1be393c56cfd916c7eada59e2314124105138a9e133

                      SHA512

                      64c324fee5dfce765bf5cd6814b5d9af750af839690f7b6cdf7e1222f506327cf27cd988d5cfeccf68070d428eb687807112c8ba8ec1500c912213c0d93fcc2e

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\datareporting\glean\db\data.safe.tmp

                      Filesize

                      5KB

                      MD5

                      ec7ac05dc87d6726ef00ff327e674e49

                      SHA1

                      08ef5f2329776431586139ba82f9aec9bd2475e2

                      SHA256

                      a5d1db7b017d0d22761bfa996bbb4e26b4ea5b5cefc9fcf048659ae085a58bf6

                      SHA512

                      d751f00672b2f3a4156f8375f068ff1b419be2e3f9c7a7763d8ba97ca700699c2a861f2d96614598b0c632d84661233db00f032f42c3f8d975026ff625e86a02

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\datareporting\glean\pending_pings\39869fc9-62d1-4fe7-99e3-5a44cff6935c

                      Filesize

                      26KB

                      MD5

                      e13c2ea876ef2ffc9e5029f6a4c65a73

                      SHA1

                      6cb7de898e8019c7ae0553f24c0fa8133a336e1f

                      SHA256

                      56251f6f5e11710c113c9bc4a96e0fd454a6b04deb8bcdcde175f0cd20f1d507

                      SHA512

                      15cac6c15cba27b2375af3fbd56a018356e14950112a22a28478b6a2668b71a2f3e7f364c3eb9e2b4986f97c8c7dd67d4855ae336fb7a04e33d51bd10fb0914a

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\datareporting\glean\pending_pings\be16b1b5-60a1-45ab-9d2a-d5d48ee311b4

                      Filesize

                      982B

                      MD5

                      224247d27535a716c40e0bd5975e388d

                      SHA1

                      45f40a81ed80156288793151a15b548b69583357

                      SHA256

                      2d1035d493b3dfdaa57199556262c6efcb6048c7a2bd587dc913fb248520fe4d

                      SHA512

                      1cfbfec03ee2e45438572da15cc0a781bb9213cb88da4c0846ddf86f8f107605957ad456f97592d5b2360294215d40d0afa587f28a2ef9392839dbccfe605245

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\datareporting\glean\pending_pings\e036496b-42e3-4de1-9f0d-13396258b408

                      Filesize

                      671B

                      MD5

                      58ef48a38a445fc72b389a3bf5d13a0f

                      SHA1

                      3969945ef5df270434e273ed83c6b366750ba69b

                      SHA256

                      29b9c7427920b28bd5c987f6b1edf102d7ca009f892428059c048b2ef564fcfd

                      SHA512

                      58259dd3a9d7bd212dac3a1e5c2613e0da09425a2d007aa96cffb2fed2da008c2c6f3c1580a1c74686b41b6b014721260f84e14054b63e794896cb294c4ff93d

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\gmp-gmpopenh264\2.3.2\gmpopenh264.dll

                      Filesize

                      1.1MB

                      MD5

                      842039753bf41fa5e11b3a1383061a87

                      SHA1

                      3e8fe1d7b3ad866b06dca6c7ef1e3c50c406e153

                      SHA256

                      d88dd3bfc4a558bb943f3caa2e376da3942e48a7948763bf9a38f707c2cd0c1c

                      SHA512

                      d3320f7ac46327b7b974e74320c4d853e569061cb89ca849cd5d1706330aca629abeb4a16435c541900d839f46ff72dfde04128c450f3e1ee63c025470c19157

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\gmp-gmpopenh264\2.3.2\gmpopenh264.info

                      Filesize

                      116B

                      MD5

                      2a461e9eb87fd1955cea740a3444ee7a

                      SHA1

                      b10755914c713f5a4677494dbe8a686ed458c3c5

                      SHA256

                      4107f76ba1d9424555f4e8ea0acef69357dfff89dfa5f0ec72aa4f2d489b17bc

                      SHA512

                      34f73f7bf69d7674907f190f257516e3956f825e35a2f03d58201a5a630310b45df393f2b39669f9369d1ac990505a4b6849a0d34e8c136e1402143b6cedf2d3

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\gmp-widevinecdm\4.10.2710.0\manifest.json

                      Filesize

                      372B

                      MD5

                      bf957ad58b55f64219ab3f793e374316

                      SHA1

                      a11adc9d7f2c28e04d9b35e23b7616d0527118a1

                      SHA256

                      bbab6ca07edbed72a966835c7907b3e60c7aa3d48ddea847e5076bd05f4b1eda

                      SHA512

                      79c179b56e4893fb729b225818ab4b95a50b69666ac41d17aad0b37ab0ca8cd9f0848cbc3c5d9e69e4640a8b261d7ced592eae9bcb0e0b63c05a56e7c477f44e

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\gmp-widevinecdm\4.10.2710.0\widevinecdm.dll

                      Filesize

                      17.8MB

                      MD5

                      daf7ef3acccab478aaa7d6dc1c60f865

                      SHA1

                      f8246162b97ce4a945feced27b6ea114366ff2ad

                      SHA256

                      bc40c7821dcd3fea9923c6912ab1183a942c11b7690cfd79ed148ded0228777e

                      SHA512

                      5840a45cfdb12c005e117608b1e5d946e1b2e76443ed39ba940d7f56de4babeab09bee7e64b903eb82bb37624c0a0ef19e9b59fbe2ce2f0e0b1c7a6015a63f75

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\prefs-1.js

                      Filesize

                      12KB

                      MD5

                      492a34c22b4c027a08bf307995145481

                      SHA1

                      b85c6095d6961c8ae7c0ab3f0a1c7238fe919cbd

                      SHA256

                      2459d8b83dccc2e10941b79a2a5a083fb57c361fc205d196d0b7ff6548805f0a

                      SHA512

                      fbddd9e2b58a81f6bbdca759c62a2ea35e29e568ae8132d768347d1fd53fb96b8cba45b0150d30a10886f603278f7dd6098fd60290aedb70dc176a0cb9629acd

                    • C:\Users\Admin\AppData\Roaming\Mozilla\Firefox\Profiles\zirruo9e.default-release\sessionstore-backups\recovery.baklz4

                      Filesize

                      1KB

                      MD5

                      17ba153e2e67c6bb586050fb9c520091

                      SHA1

                      c7ff4bedfefc629e59845b1a9ea9cf8bbe0676e4

                      SHA256

                      a03411c79076ce4133005dc5b879cf491589e983933b356be839a01fd499734c

                      SHA512

                      48e6e59a533cfb714587e0b34123adc76af0e10854bd457e5817895158600f6257dc1d1045d50e60aabe45d6f90aee19a6e2cfaa96a6abb1753b00f841c5d479

                    • C:\Users\Admin\Downloads\KWuA2Mp6.pyc.part

                      Filesize

                      75KB

                      MD5

                      44d80709f492610a377eafff857aa413

                      SHA1

                      91e53c38437797bd7e0ae5bb45a3e03144c4ec21

                      SHA256

                      2312b7c1b6704e66d44d44971fed7492d2fa9655009e3cc00c6a7a79e59d8c53

                      SHA512

                      b3b42555de7648aa4a1d6dfc94ae0503964913af7baa9528b623e5f9991a560734d43b9c88608a3cca5f13c507debfd4711951230d2932933d981b7c0b31f0d0