Analysis

  • max time kernel
    133s
  • max time network
    141s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    11/06/2024, 17:48

General

  • Target

    2024-06-11_331f34d8ab812ec3643ca8ff80f732b4_bkransomware.exe

  • Size

    3.6MB

  • MD5

    331f34d8ab812ec3643ca8ff80f732b4

  • SHA1

    885332c9f08088885501b90c868e933a275b4267

  • SHA256

    a590373ca9461d4b1bd22bd22e0fe58151a81640982f96dc470644172e6bfdce

  • SHA512

    2727e3990815305b3fdb6d38315f140f3fb9057c599cf4fa451144d1c83a75c97ccd9254dbdc7a5b905e8e71e20b2d77a6cdb64858cca9553ccc901fcc17a80f

  • SSDEEP

    98304:DK95z5A7niCrT4sKmpdgah6yIpyopUxWcVBZ7FnIxmQs7Jl:Gjza71rT4sVp38yNxrV/7mLM

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 27 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 5 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-06-11_331f34d8ab812ec3643ca8ff80f732b4_bkransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-11_331f34d8ab812ec3643ca8ff80f732b4_bkransomware.exe"
    1⤵
    • Loads dropped DLL
    • Adds Run key to start application
    • Drops file in Windows directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2648
    • C:\Users\Admin\AppData\Local\Temp\B39qGZs03TshL9o.exe
      C:\Users\Admin\AppData\Local\Temp\B39qGZs03TshL9o.exe
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2856
      • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\vs_setup_bootstrapper.exe
        "C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\vs_setup_bootstrapper.exe" --env "_SFX_CAB_EXE_PACKAGE:C:\Users\Admin\AppData\Local\Temp\B39qGZs03TshL9o.exe _SFX_CAB_EXE_ORIGINALWORKINGDIR:C:\Users\Admin\AppData\Local\Temp"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Checks processor information in registry
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2680
        • C:\Windows\SysWOW64\getmac.exe
          "getmac"
          4⤵
            PID:2148
      • C:\Windows\CTS.exe
        "C:\Windows\CTS.exe"
        2⤵
        • Executes dropped EXE
        • Adds Run key to start application
        • Drops file in Windows directory
        • Suspicious use of AdjustPrivilegeToken
        PID:2996

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\ProgramData\Microsoft Visual Studio\prpbg.dat.bak

            Filesize

            524B

            MD5

            5a744a5ad32e332c65a85ccd710020d8

            SHA1

            57fc4a7fd698a70dc328207526f85393cf955cfd

            SHA256

            fc9d00569c460fd79154821923a4dcb0063f60db6c709200b81a72f852d990bf

            SHA512

            a7ba98cd076ef0f4793cc61c7c77a1df265642443b7183279de737b993024c342e7f25cee45ea9bb57ce21e537e271f16dff83ab383a9e2b6a18434e45c3d8e5

          • C:\Users\Admin\AppData\Local\Microsoft\VSApplicationInsights\vstelAIF-312cbd79-9dbb-4c48-a7da-3cc2a931cb70\20240611174910_6eb765ecddff496ead63e9cbcf545b30.trn

            Filesize

            7KB

            MD5

            0f1727cff83bc38330e7d7190c1b8d1a

            SHA1

            9c77e4d84c4c32894dc4bc49e994d420a8a908d4

            SHA256

            ac165ece4d76ddc48ac0247e7e5990def8abca530b87d56f773a89266ac9d051

            SHA512

            ea17b976bb5539ce7480ac598ba06626593db42990315b44b76ee6be99220384a8887590c1a019b85f2f12d0583109df944afe96c912a322926cacbe65b654ba

          • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Microsoft.C2RSignatureReader.Native.dll

            Filesize

            113KB

            MD5

            ed2315668a0dda422f463d27c8110838

            SHA1

            ce17813ccc0cd968d9fb3d01e7b7ffbf3b05cebe

            SHA256

            0ce6da02115192a688359299b1a47ce9e6b2a8adf3dfcd92a2467b55d5f3c0aa

            SHA512

            e9a47c030fa20a8d36f0c47293e547de0e7d978813ebde64f181d76d8606cf629846075ecb5e3a0b9d262a6fba7aeb0caa8fe3006c018de3c2c2ecdbf31c1eb7

          • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Microsoft.VisualStudio.Setup.Download.dll

            Filesize

            133KB

            MD5

            a6076a6e981bc6c29f270d3919e722e8

            SHA1

            739c1b7fe6ade740cd87aeb84a4ac10720b14a2a

            SHA256

            460bed22e1f7148209901da0eb97fd8d83fef8f1404e3fb82219c90ae2876710

            SHA512

            064f5a4756b3a0b8f8017e892ab85e0340d9f60fd1c03f2250cc24bdb0d650edaae873c8dcf543af31e027ac5eaa1bfeda99099286de71332eced742c78d6720

          • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Microsoft.VisualStudio.Setup.dll

            Filesize

            1.2MB

            MD5

            fc32f39277ebbe48d976c9970cdab5dd

            SHA1

            2d2e6eafd0d16ec8f577293f4903f2ae3453752f

            SHA256

            7dd27a5ca48c16725e3a3ec9b18b1e198390e4c5f62af9a5c2489b27e3f871f8

            SHA512

            30f99c799d2f88fc5cd66593435f851410e9cbafb10ad435c57a85a7eb86a4cf7179937b2da2597dab77da3b04d9770331ea776053d02af08ad4f6c7abbc45ea

          • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Microsoft.VisualStudio.Telemetry.dll

            Filesize

            919KB

            MD5

            015ef51b3e50cc182b323524e5296172

            SHA1

            f5e8cb54340c3f6f0c4876348193afd04bb10323

            SHA256

            289200599446f28664d3a44774ec076061fab75fa7307637284bf50231d25c0b

            SHA512

            8c69cbaee9e9d4c526fd5f5db5a1d5030821f1ce79e7a4698bb2ef9617e81832528130a485c09bfd24b63202e5c91ba03accdbe53f0be9a3bcb11e16b12097e5

          • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\detection.json

            Filesize

            8KB

            MD5

            782f4beae90d11351db508f38271eb26

            SHA1

            f1e92aea9e2cd005c2fb6d4face0258d4f1d8b6c

            SHA256

            c828a2e5b4045ce36ecf5b49d33d6404c9d6f865df9b3c9623787c2332df07d9

            SHA512

            0a02beeca5c4e64044692b665507378e6f8b38e519a17c3ceccca1e87f85e1e2e7b3598e598fc84c962d3a5c723b28b52ee0351faaec82a846f0313f3c21e0e4

          • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\vs_setup_bootstrapper.config

            Filesize

            618B

            MD5

            0e4ebc00f6099b2e065d9015fb53977d

            SHA1

            7542e6ecbd4fe9c018f1875126f72159a14369d8

            SHA256

            2f2975da8453485ddf84221e1e3d6823dcba996a4ce44cd6391cf4d2dd18e828

            SHA512

            2937e89aad01ca30f9aff99f84c33083c7a32ce8534e98a0c5acd8ab3edfeb23d2f6d9d99902ea34857c187ec093f18e833a192f71d29d18a7e378ecf351923e

          • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\vs_setup_bootstrapper.exe.config

            Filesize

            2KB

            MD5

            010d94408fd5432563d51e416ba346b3

            SHA1

            0041f1989b67b666ec0f0581f9e6ce0e94b55c55

            SHA256

            0472025ac139903fead459c4c173364f128f68f015d0299fb0ddd835f7437d5d

            SHA512

            d3252d2f2e07ca2e29c26894400690a0698a8cfcaefc3dd7f7c5020193725e331833fe997b8889807900e08d5c9b09ce69e803d64452b297385713f0e3a325f1

          • C:\Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\vs_setup_bootstrapper.json

            Filesize

            163B

            MD5

            ecd028adc95c8ae1a92db26c5fdedb09

            SHA1

            a0b505a8ba954147e33542de25fdbd54ef3c5304

            SHA256

            94cdbb8cd5b9fd5e44858efe36e25994c56848fa0e77920c08253f3e3063a2e3

            SHA512

            0df8ace311c4bb75e4e036857828a57a1f76d075fe2056ef44fd9f3d865ab7dbc686c01274627b418a530ba0e761673d29c3f0ee3432887df7465ecfd167b7f6

          • C:\Windows\CTS.exe

            Filesize

            71KB

            MD5

            66df4ffab62e674af2e75b163563fc0b

            SHA1

            dec8a197312e41eeb3cfef01cb2a443f0205cd6e

            SHA256

            075a6eecd8da1795532318f9cf880efe42461f9464d63f74deb271d33110f163

            SHA512

            1588dd78e6e8972013c40cdb6acfb84c8df7b081197233ce621904b645356c805d0424bb93dd46c55834dc47d9ff39ee1323cf8e670841b3fff24ab98ba87f25

          • \Users\Admin\AppData\Local\Temp\B39qGZs03TshL9o.exe

            Filesize

            3.5MB

            MD5

            f32908d4944949b7c026a0421ce04879

            SHA1

            54f01696973eb9cc63c5a0a08812c188dd5150df

            SHA256

            2cd59d39d80de8823851ede07d0ddba1f283b0fae86060441f748b11e6e31f4f

            SHA512

            8d2ad3ea536a84320da3cbe874aca227329069624f2606767adc335ded18fd6f0646d74d7169179bebb1fce7bc4687f2164a0f23dd50d251a392bf4eea7d36c8

          • \Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Microsoft.C2RSignatureReader.Interop.dll

            Filesize

            18KB

            MD5

            7ef638cbd3200605fc15e7be7ea9fcb5

            SHA1

            534f6176f10bc79b2655e535b7ac6a4df9f67855

            SHA256

            467df0856c41d9b37e6c55ae1b82edcca60f4c7847f93b7f24ca6543b675ad8a

            SHA512

            c145576d119e2053c0cbffb910f63003d42c2af320ba410f6e81da9e40cc337000d8ad733778873bd2700e366f5672c311d69b4b2391564fe19fa6e48c1cb373

          • \Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Microsoft.VisualStudio.RemoteControl.dll

            Filesize

            44KB

            MD5

            2338953ae2ab47de1703f27e872e84ba

            SHA1

            2765b2f2cd04a0e1df7556da551ce9d763bc5c4d

            SHA256

            bfc4890087c01f629fa09e744e5a861f9f68b504100cbcf805855fa5906d61c7

            SHA512

            417ce0ef8344409ebd05b8c52b58a3960489fe810b95af31e72430690ffb8258042a73e205fc27396731113ad84302ff898821b4f2db2b9d4fa2b2293ccca872

          • \Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Microsoft.VisualStudio.Setup.Common.dll

            Filesize

            401KB

            MD5

            d4fa5e438ff243a1da462726fb4ea164

            SHA1

            7effd06f4eaa0a5d701ea4162dce55cbfeb4c0cd

            SHA256

            fa9d5c116363ccc82f92767bbb36d154f8903b861a9de65a01fd7824a566b4b0

            SHA512

            8dbfc97abb5eb4363a1c896a4d276630a502354ed144e60dfb0ffbc1245486003d8af49443fd4baa70541114b50764467caed709cc416f60eaf33fd0f6fcee7b

          • \Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Microsoft.VisualStudio.Utilities.Internal.dll

            Filesize

            41KB

            MD5

            c510b1756eac53c62ba8c7279609357f

            SHA1

            953ee732da8c49d2ef97711f5b7220d5e2cea8d6

            SHA256

            188f3af3e336a5bf1dc82007fa4b96522b3ed946326a65b93dbeb0e24356f642

            SHA512

            61ebf783d156733cbcf654a73bb73a67e63bc544376154b86f8c418a9ffaced9dfb7a0eea1b36d2622f7990539b078064cabe5d26976124a18e6aba580be2b33

          • \Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\Newtonsoft.Json.dll

            Filesize

            685KB

            MD5

            081d9558bbb7adce142da153b2d5577a

            SHA1

            7d0ad03fbda1c24f883116b940717e596073ae96

            SHA256

            b624949df8b0e3a6153fdfb730a7c6f4990b6592ee0d922e1788433d276610f3

            SHA512

            2fdf035661f349206f58ea1feed8805b7f9517a21f9c113e7301c69de160f184c774350a12a710046e3ff6baa37345d319b6f47fd24fbba4e042d54014bee511

          • \Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\System.Runtime.CompilerServices.Unsafe.dll

            Filesize

            16KB

            MD5

            9a341540899dcc5630886f2d921be78f

            SHA1

            bab44612721c3dc91ac3d9dfca7c961a3a511508

            SHA256

            3cadcb6b8a7335141c7c357a1d77af1ff49b59b872df494f5025580191d1c0d5

            SHA512

            066984c83de975df03eee1c2b5150c6b9b2e852d9caf90cfd956e9f0f7bd5a956b96ea961b26f7cd14c089bc8a27f868b225167020c5eb6318f66e58113efa37

          • \Users\Admin\AppData\Local\Temp\ca5878efe3ba0a5753b729\vs_bootstrapper_d15\vs_setup_bootstrapper.exe

            Filesize

            398KB

            MD5

            d6baac92ade6ade86ac8b33179c13db8

            SHA1

            c2dfc428a02ffc2c3cc293423d38037ea75cfade

            SHA256

            eafadec2a23db1e659ecec552971b847eaa78b5e665db8984e456e159715ec10

            SHA512

            7577167f2954402ffa642e1705acacc49e577268c102f00685cf5968c669d16e2925db39650882054b6e812433c98c916f737f7bacdb94ce8c37277a7585ec45

          • memory/2680-147-0x0000000001E60000-0x0000000001E86000-memory.dmp

            Filesize

            152KB

          • memory/2680-161-0x0000000001EB0000-0x0000000001EB8000-memory.dmp

            Filesize

            32KB

          • memory/2680-167-0x0000000001F80000-0x0000000001F8E000-memory.dmp

            Filesize

            56KB

          • memory/2680-157-0x0000000000580000-0x000000000058E000-memory.dmp

            Filesize

            56KB

          • memory/2680-151-0x00000000054D0000-0x0000000005580000-memory.dmp

            Filesize

            704KB

          • memory/2680-143-0x00000000004C0000-0x00000000004C8000-memory.dmp

            Filesize

            32KB

          • memory/2680-139-0x0000000004B30000-0x0000000004C1A000-memory.dmp

            Filesize

            936KB

          • memory/2680-177-0x0000000004E30000-0x0000000004E3A000-memory.dmp

            Filesize

            40KB

          • memory/2680-135-0x0000000001DF0000-0x0000000001E58000-memory.dmp

            Filesize

            416KB

          • memory/2680-131-0x0000000004950000-0x0000000004A92000-memory.dmp

            Filesize

            1.3MB

          • memory/2680-191-0x0000000004E30000-0x0000000004E3A000-memory.dmp

            Filesize

            40KB

          • memory/2680-127-0x0000000000980000-0x00000000009E6000-memory.dmp

            Filesize

            408KB