Resubmissions

08/05/2024, 15:26

240508-st9hlaba5z 9

08/05/2024, 07:08

240508-hx7s3agd7w 9

05/05/2024, 13:17

240505-qje5wsba6s 9

05/05/2024, 12:58

240505-p7yrgaaf3v 9

05/05/2024, 12:50

240505-p2w1paad7w 9

05/05/2024, 09:53

240505-lwy2bahh33 9

Analysis

  • max time kernel
    140s
  • max time network
    147s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    05/05/2024, 09:53

General

  • Target

    ByteVault.exe

  • Size

    9.8MB

  • MD5

    25a7375d3a6597707493a0841e878bce

  • SHA1

    173a8e00b00d84830e06b1f3d63988fe895fa001

  • SHA256

    7f65b5d7be7a9e563e1b577ff1d95c891b16fa9871dc748c7640e6589e6902db

  • SHA512

    110518ee80839dcf0e826bfdb41c16591deac371865b3635ef08b005a823e53c296d9de0be9eeba3d6e1c5413905f4d4d8ef175748c2c6e48801b9149668cee9

  • SSDEEP

    196608:fhfefIk7AHkPkRJW9GNZA1HeT39IigaeE9TFa0Z8DOjCdylwo1nz8QW7tx:0QFG8S1+TtIiEY9Z8D8CclPdoPx

Malware Config

Signatures

  • Renames multiple (174) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 10 IoCs
  • Drops desktop.ini file(s) 8 IoCs
  • Drops file in Windows directory 4 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 3 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 IoCs
  • Suspicious use of SetWindowsHookEx 4 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ByteVault.exe
    "C:\Users\Admin\AppData\Local\Temp\ByteVault.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:1468
    • C:\Users\Admin\AppData\Local\Temp\ByteVault.exe
      "C:\Users\Admin\AppData\Local\Temp\ByteVault.exe"
      2⤵
      • Checks computer location settings
      • Loads dropped DLL
      • Drops desktop.ini file(s)
      • Suspicious use of WriteProcessMemory
      PID:3712
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command "Set-MpPreference -DisableRealtimeMonitoring $true"
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:68
      • C:\Windows\SYSTEM32\netsh.exe
        netsh advfirewall set allprofiles state off
        3⤵
        • Modifies Windows Firewall
        PID:4152
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdge.exe" -ServerName:MicrosoftEdge.AppXdnhjhccw3zf0j06tkg3jtqr00qdm0khc.mca
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2784
  • C:\Windows\system32\browser_broker.exe
    C:\Windows\system32\browser_broker.exe -Embedding
    1⤵
    • Modifies Internet Explorer settings
    PID:432
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Modifies registry class
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2276
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:688
  • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
    "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    PID:2696
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4400
    • C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe
      "C:\Windows\SystemApps\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\MicrosoftEdgeCP.exe" -ServerName:ContentProcess.AppX6z3cwk4fvgady6zya12j1cw28d228a7k.mca
      1⤵
      • Modifies registry class
      PID:320

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\Encrypt\encrypt.html

      Filesize

      1KB

      MD5

      0b8e6e89d7ea9193b4c2b2a1fc84c22c

      SHA1

      9574d0561e2ec4276adb0e5e18e217344af09519

      SHA256

      c8d8c17a0a38fa7031794f4180903d628d04266cfd273fc1fa82222f3b958abf

      SHA512

      91fe291c4648ccaf10eaf01fb5e33ce5132dc03ee31b577bbc3a8d00fb115b2e8f3e9616f4b11b9f728302cca5fad7dbfbb2e09502c3e3d0fcb03384f7e280b0

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\IE\L5P12AEX\edgecompatviewlist[1].xml

      Filesize

      74KB

      MD5

      d4fc49dc14f63895d997fa4940f24378

      SHA1

      3efb1437a7c5e46034147cbbc8db017c69d02c31

      SHA256

      853d2f4eb81c9fdcea2ee079f6faf98214b111b77cdf68709b38989d123890f1

      SHA512

      cc60d79b4afe5007634ac21dc4bc92081880be4c0d798a1735b63b27e936c02f399964f744dc73711987f01e8a1064b02a4867dd6cac27538e5fbe275cc61e0a

    • C:\Users\Admin\AppData\Local\Packages\Microsoft.MicrosoftEdge_8wekyb3d8bbwe\AC\MicrosoftEdge\Cache\4RJHRD2W\suggestions[1].en-US

      Filesize

      17KB

      MD5

      5a34cb996293fde2cb7a4ac89587393a

      SHA1

      3c96c993500690d1a77873cd62bc639b3a10653f

      SHA256

      c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

      SHA512

      e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\VCRUNTIME140.dll

      Filesize

      116KB

      MD5

      be8dbe2dc77ebe7f88f910c61aec691a

      SHA1

      a19f08bb2b1c1de5bb61daf9f2304531321e0e40

      SHA256

      4d292623516f65c80482081e62d5dadb759dc16e851de5db24c3cbb57b87db83

      SHA512

      0da644472b374f1da449a06623983d0477405b5229e386accadb154b43b8b083ee89f07c3f04d2c0c7501ead99ad95aecaa5873ff34c5eeb833285b598d5a655

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\_bz2.pyd

      Filesize

      83KB

      MD5

      223fd6748cae86e8c2d5618085c768ac

      SHA1

      dcb589f2265728fe97156814cbe6ff3303cd05d3

      SHA256

      f81dc49eac5ecc528e628175add2ff6bda695a93ea76671d7187155aa6326abb

      SHA512

      9c22c178417b82e68f71e5b7fe7c0c0a77184ee12bd0dc049373eace7fa66c89458164d124a9167ae760ff9d384b78ca91001e5c151a51ad80c824066b8ecce6

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\_cffi_backend.cp312-win_amd64.pyd

      Filesize

      178KB

      MD5

      0572b13646141d0b1a5718e35549577c

      SHA1

      eeb40363c1f456c1c612d3c7e4923210eae4cdf7

      SHA256

      d8a76d1e31bbd62a482dea9115fc1a109cb39af4cf6d1323409175f3c93113a7

      SHA512

      67c28432ca8b389acc26e47eb8c4977fddd4af9214819f89df07fecbc8ed750d5f35807a1b195508dd1d77e2a7a9d7265049dcfbfe7665a7fd1ba45da1e4e842

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\_decimal.pyd

      Filesize

      245KB

      MD5

      3055edf761508190b576e9bf904003aa

      SHA1

      f0dc8d882b5cd7955cc6dfc8f9834f70a83c7890

      SHA256

      e4104e47399d3f635a14d649f61250e9fd37f7e65c81ffe11f099923f8532577

      SHA512

      87538fe20bd2c1150a8fefd0478ffd32e2a9c59d22290464bf5dfb917f6ac7ec874f8b1c70d643a4dc3dd32cbe17e7ea40c0be3ea9dd07039d94ab316f752248

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\_hashlib.pyd

      Filesize

      64KB

      MD5

      eedb6d834d96a3dffffb1f65b5f7e5be

      SHA1

      ed6735cfdd0d1ec21c7568a9923eb377e54b308d

      SHA256

      79c4cde23397b9a35b54a3c2298b3c7a844454f4387cb0693f15e4facd227dd2

      SHA512

      527bd7bb2f4031416762595f4ce24cbc6254a50eaf2cc160b930950c4f2b3f5e245a486972148c535f8cd80c78ec6fa8c9a062085d60db8f23d4b21e8ae4c0ad

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\_lzma.pyd

      Filesize

      156KB

      MD5

      05e8b2c429aff98b3ae6adc842fb56a3

      SHA1

      834ddbced68db4fe17c283ab63b2faa2e4163824

      SHA256

      a6e2a5bb7a33ad9054f178786a031a46ea560faeef1fb96259331500aae9154c

      SHA512

      badeb99795b89bc7c1f0c36becc7a0b2ce99ecfd6f6bb493bda24b8e57e6712e23f4c509c96a28bc05200910beddc9f1536416bbc922331cae698e813cbb50b3

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\_socket.pyd

      Filesize

      81KB

      MD5

      dc06f8d5508be059eae9e29d5ba7e9ec

      SHA1

      d666c88979075d3b0c6fd3be7c595e83e0cb4e82

      SHA256

      7daff6aa3851a913ed97995702a5dfb8a27cb7cf00fb496597be777228d7564a

      SHA512

      57eb36bc1e9be20c85c34b0a535b2349cb13405d60e752016e23603c4648939f1150e4dbebc01ec7b43eb1a6947c182ccb8a806e7e72167ad2e9d98d1fd94ab3

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\base_library.zip

      Filesize

      1.3MB

      MD5

      08332a62eb782d03b959ba64013ac5bc

      SHA1

      b70b6ae91f1bded398ca3f62e883ae75e9966041

      SHA256

      8584f0eb44456a275e3bc69626e3acad595546fd78de21a946b2eb7d6ba02288

      SHA512

      a58e4a096d3ce738f6f93477c9a73ddbfcb4b82d212c0a19c0cf9e07f1e62b2f477a5dd468cd31cc5a13a73b93fa17f64d6b516afef2c56d38ede1ace35cf087

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\cryptography\hazmat\bindings\_rust.pyd

      Filesize

      6.9MB

      MD5

      61d63fbd7dd1871392997dd3cef6cc8e

      SHA1

      45a0a7f26f51ce77aa1d89f8bedb4af90e755fa9

      SHA256

      ae3a2936b138a2faa4d0cd6445fae97e441b23f6fdafb1a30e60fd80c37d7df5

      SHA512

      c31f1f281d354acb424a510d54790ee809364b55425b1d39429e1bb7c379126578260c6f197834339a34833c90e748483aabd426295731f78fcde9580fcd8f9f

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\libcrypto-3.dll

      Filesize

      5.0MB

      MD5

      e547cf6d296a88f5b1c352c116df7c0c

      SHA1

      cafa14e0367f7c13ad140fd556f10f320a039783

      SHA256

      05fe080eab7fc535c51e10c1bd76a2f3e6217f9c91a25034774588881c3f99de

      SHA512

      9f42edf04c7af350a00fa4fdf92b8e2e6f47ab9d2d41491985b20cd0adde4f694253399f6a88f4bdd765c4f49792f25fb01e84ec03fd5d0be8bb61773d77d74d

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\python312.dll

      Filesize

      6.6MB

      MD5

      3c388ce47c0d9117d2a50b3fa5ac981d

      SHA1

      038484ff7460d03d1d36c23f0de4874cbaea2c48

      SHA256

      c98ba3354a7d1f69bdca42560feec933ccba93afcc707391049a065e1079cddb

      SHA512

      e529c5c1c028be01e44a156cd0e7cad0a24b5f91e5d34697fafc395b63e37780dc0fac8f4c5d075ad8fe4bd15d62a250b818ff3d4ead1e281530a4c7e3ce6d35

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\select.pyd

      Filesize

      29KB

      MD5

      92b440ca45447ec33e884752e4c65b07

      SHA1

      5477e21bb511cc33c988140521a4f8c11a427bcc

      SHA256

      680df34fb908c49410ac5f68a8c05d92858acd111e62d1194d15bdce520bd6c3

      SHA512

      40e60e1d1445592c5e8eb352a4052db28b1739a29e16b884b0ba15917b058e66196988214ce473ba158704837b101a13195d5e48cb1dc2f07262dfecfe8d8191

    • C:\Users\Admin\AppData\Local\Temp\_MEI14682\unicodedata.pyd

      Filesize

      1.1MB

      MD5

      16be9a6f941f1a2cb6b5fca766309b2c

      SHA1

      17b23ae0e6a11d5b8159c748073e36a936f3316a

      SHA256

      10ffd5207eeff5a836b330b237d766365d746c30e01abf0fd01f78548d1f1b04

      SHA512

      64b7ecc58ae7cf128f03a0d5d5428aaa0d4ad4ae7e7d19be0ea819bbbf99503836bfe4946df8ee3ab8a92331fdd002ab9a9de5146af3e86fef789ce46810796b

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_vay0betz.ir0.ps1

      Filesize

      1B

      MD5

      c4ca4238a0b923820dcc509a6f75849b

      SHA1

      356a192b7913b04c54574d18c28d46e6395428ab

      SHA256

      6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

      SHA512

      4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

    • \Users\Admin\AppData\Local\Temp\_MEI14682\python3.dll

      Filesize

      66KB

      MD5

      79b02450d6ca4852165036c8d4eaed1f

      SHA1

      ce9ff1b302426d4c94a2d3ea81531d3cb9e583e4

      SHA256

      d2e348e615a5d3b08b0bac29b91f79b32f0c1d0be48976450042462466b51123

      SHA512

      47044d18db3a4dd58a93b43034f4fafa66821d157dcfefb85fca2122795f4591dc69a82eb2e0ebd9183075184368850e4caf9c9fea0cfe6f766c73a60ffdf416

    • memory/68-86-0x00007FFA5F5D0000-0x00007FFA5FFBC000-memory.dmp

      Filesize

      9.9MB

    • memory/68-55-0x00000162C1660000-0x00000162C16D6000-memory.dmp

      Filesize

      472KB

    • memory/68-91-0x00007FFA5F5D0000-0x00007FFA5FFBC000-memory.dmp

      Filesize

      9.9MB

    • memory/68-95-0x00007FFA5F5D0000-0x00007FFA5FFBC000-memory.dmp

      Filesize

      9.9MB

    • memory/68-50-0x00007FFA5F5D3000-0x00007FFA5F5D4000-memory.dmp

      Filesize

      4KB

    • memory/68-52-0x00000162C14B0000-0x00000162C14D2000-memory.dmp

      Filesize

      136KB

    • memory/68-57-0x00007FFA5F5D0000-0x00007FFA5FFBC000-memory.dmp

      Filesize

      9.9MB

    • memory/68-56-0x00007FFA5F5D0000-0x00007FFA5FFBC000-memory.dmp

      Filesize

      9.9MB

    • memory/688-328-0x000001B6E8C80000-0x000001B6E8D80000-memory.dmp

      Filesize

      1024KB

    • memory/688-327-0x000001B6E8C80000-0x000001B6E8D80000-memory.dmp

      Filesize

      1024KB

    • memory/688-329-0x000001B6E8C80000-0x000001B6E8D80000-memory.dmp

      Filesize

      1024KB

    • memory/2696-338-0x000001CEC5BE0000-0x000001CEC5BE2000-memory.dmp

      Filesize

      8KB

    • memory/2696-335-0x000001CEB5700000-0x000001CEB5800000-memory.dmp

      Filesize

      1024KB

    • memory/2696-345-0x000001CEC5CF0000-0x000001CEC5CF2000-memory.dmp

      Filesize

      8KB

    • memory/2696-343-0x000001CEC5CD0000-0x000001CEC5CD2000-memory.dmp

      Filesize

      8KB

    • memory/2696-341-0x000001CEC5C10000-0x000001CEC5C12000-memory.dmp

      Filesize

      8KB

    • memory/2696-337-0x000001CEB5700000-0x000001CEB5800000-memory.dmp

      Filesize

      1024KB

    • memory/2784-311-0x000002BF087F0000-0x000002BF087F2000-memory.dmp

      Filesize

      8KB

    • memory/2784-276-0x000002BF0B520000-0x000002BF0B530000-memory.dmp

      Filesize

      64KB

    • memory/2784-368-0x000002BF123E0000-0x000002BF123E1000-memory.dmp

      Filesize

      4KB

    • memory/2784-369-0x000002BF123F0000-0x000002BF123F1000-memory.dmp

      Filesize

      4KB

    • memory/2784-292-0x000002BF0B620000-0x000002BF0B630000-memory.dmp

      Filesize

      64KB