Resubmissions

07-05-2024 19:29

240507-x7rbdsed93 9

07-05-2024 18:20

240507-wyy47she2x 9

07-05-2024 17:15

240507-vs3prsac54 9

07-05-2024 08:54

240507-ktxvsshc9s 9

Analysis

  • max time kernel
    149s
  • max time network
    145s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    07-05-2024 19:29

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 (113) 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 30 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:4252
    • 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:3596
      • 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:652
      • C:\Windows\SYSTEM32\netsh.exe
        netsh advfirewall set allprofiles state off
        3⤵
        • Modifies Windows Firewall
        PID:4588
  • 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:2592
  • C:\Windows\system32\browser_broker.exe
    C:\Windows\system32\browser_broker.exe -Embedding
    1⤵
    • Modifies Internet Explorer settings
    PID:2688
  • 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:3088
  • 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:3608
  • 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:4720
  • 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:1848
  • 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:2588

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\V28C7N3J\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\FO47SQ4Z\suggestions[1].en-US

    Filesize

    17KB

    MD5

    5a34cb996293fde2cb7a4ac89587393a

    SHA1

    3c96c993500690d1a77873cd62bc639b3a10653f

    SHA256

    c6a5377cbc07eece33790cfc70572e12c7a48ad8296be25c0cc805a1f384dbad

    SHA512

    e1b7d0107733f81937415104e70f68b1be6fd0ca65dccf4ff72637943d44278d3a77f704aedff59d2dbc0d56a609b2590c8ec0dd6bc48ab30f1dad0c07a0a3ee

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\_bz2.pyd

    Filesize

    83KB

    MD5

    223fd6748cae86e8c2d5618085c768ac

    SHA1

    dcb589f2265728fe97156814cbe6ff3303cd05d3

    SHA256

    f81dc49eac5ecc528e628175add2ff6bda695a93ea76671d7187155aa6326abb

    SHA512

    9c22c178417b82e68f71e5b7fe7c0c0a77184ee12bd0dc049373eace7fa66c89458164d124a9167ae760ff9d384b78ca91001e5c151a51ad80c824066b8ecce6

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\_cffi_backend.cp312-win_amd64.pyd

    Filesize

    178KB

    MD5

    0572b13646141d0b1a5718e35549577c

    SHA1

    eeb40363c1f456c1c612d3c7e4923210eae4cdf7

    SHA256

    d8a76d1e31bbd62a482dea9115fc1a109cb39af4cf6d1323409175f3c93113a7

    SHA512

    67c28432ca8b389acc26e47eb8c4977fddd4af9214819f89df07fecbc8ed750d5f35807a1b195508dd1d77e2a7a9d7265049dcfbfe7665a7fd1ba45da1e4e842

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\_decimal.pyd

    Filesize

    245KB

    MD5

    3055edf761508190b576e9bf904003aa

    SHA1

    f0dc8d882b5cd7955cc6dfc8f9834f70a83c7890

    SHA256

    e4104e47399d3f635a14d649f61250e9fd37f7e65c81ffe11f099923f8532577

    SHA512

    87538fe20bd2c1150a8fefd0478ffd32e2a9c59d22290464bf5dfb917f6ac7ec874f8b1c70d643a4dc3dd32cbe17e7ea40c0be3ea9dd07039d94ab316f752248

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\_hashlib.pyd

    Filesize

    64KB

    MD5

    eedb6d834d96a3dffffb1f65b5f7e5be

    SHA1

    ed6735cfdd0d1ec21c7568a9923eb377e54b308d

    SHA256

    79c4cde23397b9a35b54a3c2298b3c7a844454f4387cb0693f15e4facd227dd2

    SHA512

    527bd7bb2f4031416762595f4ce24cbc6254a50eaf2cc160b930950c4f2b3f5e245a486972148c535f8cd80c78ec6fa8c9a062085d60db8f23d4b21e8ae4c0ad

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\_lzma.pyd

    Filesize

    156KB

    MD5

    05e8b2c429aff98b3ae6adc842fb56a3

    SHA1

    834ddbced68db4fe17c283ab63b2faa2e4163824

    SHA256

    a6e2a5bb7a33ad9054f178786a031a46ea560faeef1fb96259331500aae9154c

    SHA512

    badeb99795b89bc7c1f0c36becc7a0b2ce99ecfd6f6bb493bda24b8e57e6712e23f4c509c96a28bc05200910beddc9f1536416bbc922331cae698e813cbb50b3

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\_socket.pyd

    Filesize

    81KB

    MD5

    dc06f8d5508be059eae9e29d5ba7e9ec

    SHA1

    d666c88979075d3b0c6fd3be7c595e83e0cb4e82

    SHA256

    7daff6aa3851a913ed97995702a5dfb8a27cb7cf00fb496597be777228d7564a

    SHA512

    57eb36bc1e9be20c85c34b0a535b2349cb13405d60e752016e23603c4648939f1150e4dbebc01ec7b43eb1a6947c182ccb8a806e7e72167ad2e9d98d1fd94ab3

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\base_library.zip

    Filesize

    1.3MB

    MD5

    08332a62eb782d03b959ba64013ac5bc

    SHA1

    b70b6ae91f1bded398ca3f62e883ae75e9966041

    SHA256

    8584f0eb44456a275e3bc69626e3acad595546fd78de21a946b2eb7d6ba02288

    SHA512

    a58e4a096d3ce738f6f93477c9a73ddbfcb4b82d212c0a19c0cf9e07f1e62b2f477a5dd468cd31cc5a13a73b93fa17f64d6b516afef2c56d38ede1ace35cf087

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\cryptography\hazmat\bindings\_rust.pyd

    Filesize

    6.9MB

    MD5

    61d63fbd7dd1871392997dd3cef6cc8e

    SHA1

    45a0a7f26f51ce77aa1d89f8bedb4af90e755fa9

    SHA256

    ae3a2936b138a2faa4d0cd6445fae97e441b23f6fdafb1a30e60fd80c37d7df5

    SHA512

    c31f1f281d354acb424a510d54790ee809364b55425b1d39429e1bb7c379126578260c6f197834339a34833c90e748483aabd426295731f78fcde9580fcd8f9f

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\libcrypto-3.dll

    Filesize

    5.0MB

    MD5

    e547cf6d296a88f5b1c352c116df7c0c

    SHA1

    cafa14e0367f7c13ad140fd556f10f320a039783

    SHA256

    05fe080eab7fc535c51e10c1bd76a2f3e6217f9c91a25034774588881c3f99de

    SHA512

    9f42edf04c7af350a00fa4fdf92b8e2e6f47ab9d2d41491985b20cd0adde4f694253399f6a88f4bdd765c4f49792f25fb01e84ec03fd5d0be8bb61773d77d74d

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\python3.dll

    Filesize

    66KB

    MD5

    79b02450d6ca4852165036c8d4eaed1f

    SHA1

    ce9ff1b302426d4c94a2d3ea81531d3cb9e583e4

    SHA256

    d2e348e615a5d3b08b0bac29b91f79b32f0c1d0be48976450042462466b51123

    SHA512

    47044d18db3a4dd58a93b43034f4fafa66821d157dcfefb85fca2122795f4591dc69a82eb2e0ebd9183075184368850e4caf9c9fea0cfe6f766c73a60ffdf416

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\python312.dll

    Filesize

    6.6MB

    MD5

    3c388ce47c0d9117d2a50b3fa5ac981d

    SHA1

    038484ff7460d03d1d36c23f0de4874cbaea2c48

    SHA256

    c98ba3354a7d1f69bdca42560feec933ccba93afcc707391049a065e1079cddb

    SHA512

    e529c5c1c028be01e44a156cd0e7cad0a24b5f91e5d34697fafc395b63e37780dc0fac8f4c5d075ad8fe4bd15d62a250b818ff3d4ead1e281530a4c7e3ce6d35

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\select.pyd

    Filesize

    29KB

    MD5

    92b440ca45447ec33e884752e4c65b07

    SHA1

    5477e21bb511cc33c988140521a4f8c11a427bcc

    SHA256

    680df34fb908c49410ac5f68a8c05d92858acd111e62d1194d15bdce520bd6c3

    SHA512

    40e60e1d1445592c5e8eb352a4052db28b1739a29e16b884b0ba15917b058e66196988214ce473ba158704837b101a13195d5e48cb1dc2f07262dfecfe8d8191

  • C:\Users\Admin\AppData\Local\Temp\_MEI42522\unicodedata.pyd

    Filesize

    1.1MB

    MD5

    16be9a6f941f1a2cb6b5fca766309b2c

    SHA1

    17b23ae0e6a11d5b8159c748073e36a936f3316a

    SHA256

    10ffd5207eeff5a836b330b237d766365d746c30e01abf0fd01f78548d1f1b04

    SHA512

    64b7ecc58ae7cf128f03a0d5d5428aaa0d4ad4ae7e7d19be0ea819bbbf99503836bfe4946df8ee3ab8a92331fdd002ab9a9de5146af3e86fef789ce46810796b

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3f25a30u.mrw.ps1

    Filesize

    1B

    MD5

    c4ca4238a0b923820dcc509a6f75849b

    SHA1

    356a192b7913b04c54574d18c28d46e6395428ab

    SHA256

    6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

    SHA512

    4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

  • \Users\Admin\AppData\Local\Temp\_MEI42522\VCRUNTIME140.dll

    Filesize

    116KB

    MD5

    be8dbe2dc77ebe7f88f910c61aec691a

    SHA1

    a19f08bb2b1c1de5bb61daf9f2304531321e0e40

    SHA256

    4d292623516f65c80482081e62d5dadb759dc16e851de5db24c3cbb57b87db83

    SHA512

    0da644472b374f1da449a06623983d0477405b5229e386accadb154b43b8b083ee89f07c3f04d2c0c7501ead99ad95aecaa5873ff34c5eeb833285b598d5a655

  • memory/652-56-0x000001AA72710000-0x000001AA72786000-memory.dmp

    Filesize

    472KB

  • memory/652-52-0x000001AA72500000-0x000001AA72522000-memory.dmp

    Filesize

    136KB

  • memory/652-86-0x00007FF83D700000-0x00007FF83E0EC000-memory.dmp

    Filesize

    9.9MB

  • memory/652-91-0x00007FF83D700000-0x00007FF83E0EC000-memory.dmp

    Filesize

    9.9MB

  • memory/652-95-0x00007FF83D700000-0x00007FF83E0EC000-memory.dmp

    Filesize

    9.9MB

  • memory/652-53-0x00007FF83D700000-0x00007FF83E0EC000-memory.dmp

    Filesize

    9.9MB

  • memory/652-57-0x00007FF83D700000-0x00007FF83E0EC000-memory.dmp

    Filesize

    9.9MB

  • memory/652-50-0x00007FF83D703000-0x00007FF83D704000-memory.dmp

    Filesize

    4KB

  • memory/2592-231-0x000001E93DE20000-0x000001E93DE30000-memory.dmp

    Filesize

    64KB

  • memory/2592-215-0x000001E93DD20000-0x000001E93DD30000-memory.dmp

    Filesize

    64KB

  • memory/2592-250-0x000001E93B1D0000-0x000001E93B1D2000-memory.dmp

    Filesize

    8KB

  • memory/2592-303-0x000001E946150000-0x000001E946151000-memory.dmp

    Filesize

    4KB

  • memory/2592-304-0x000001E946160000-0x000001E946161000-memory.dmp

    Filesize

    4KB

  • memory/4720-274-0x00000203D2640000-0x00000203D2740000-memory.dmp

    Filesize

    1024KB

  • memory/4720-284-0x00000203E2C80000-0x00000203E2C82000-memory.dmp

    Filesize

    8KB

  • memory/4720-282-0x00000203E2C60000-0x00000203E2C62000-memory.dmp

    Filesize

    8KB

  • memory/4720-277-0x00000203E2B70000-0x00000203E2B72000-memory.dmp

    Filesize

    8KB

  • memory/4720-280-0x00000203E2BA0000-0x00000203E2BA2000-memory.dmp

    Filesize

    8KB

  • memory/4720-275-0x00000203D2640000-0x00000203D2740000-memory.dmp

    Filesize

    1024KB

  • memory/4720-276-0x00000203D2640000-0x00000203D2740000-memory.dmp

    Filesize

    1024KB