Analysis

  • max time kernel
    140s
  • max time network
    159s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/02/2024, 01:27

General

  • Target
    Bear Defense.exe
  • Size 68.4MB
  • Sample240221-bvg2ashb3s
  • SHA256 fd7882196873123a3d82c1b8e98838fcc4e06a15a035399b4d5028c9f12415a5
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Enumerates VirtualBox DLL files 2 TTPs 2 IoCs
  • Sets file to hidden 1 TTPs 1 IoCs

    Modifies file attributes to stop it showing in Explorer etc.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 64 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Detects Pyinstaller 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bear Defense.exe
    "C:\Users\Admin\AppData\Local\Temp\Bear Defense.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:4608
    • C:\Users\Admin\AppData\Local\Temp\Bear Defense.exe
      "C:\Users\Admin\AppData\Local\Temp\Bear Defense.exe"
      2⤵
      • Enumerates VirtualBox DLL files
      • Loads dropped DLL
      • Adds Run key to start application
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4032
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "ver"
        3⤵
          PID:720
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -Command "Add-MpPreference -ExclusionPath \"C:\Users\Admin\\\""
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4968
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c C:\Users\Admin\\activate.bat
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:3148
          • C:\Windows\system32\attrib.exe
            attrib +s +h .
            4⤵
            • Sets file to hidden
            • Views/modifies file attributes
            PID:2492
          • C:\Users\Admin\Bear Defense.exe
            "Bear Defense.exe"
            4⤵
            • Executes dropped EXE
            PID:4536
          • C:\Windows\system32\taskkill.exe
            taskkill /f /im "Bear Defense.exe"
            4⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:4356

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          SDL2.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\SDL2.dll
          • Size 1.5MB
          • SHA256 18ba874c78ffaa397d0a25282ff08f19855a7fbf0fcb13dec9b24b388d7f7092
          • MD5 SHA1 SHA512 SSDEEP

          SDL2_image.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\SDL2_image.dll
          • Size 122KB
          • SHA256 1e364af75fee0c83506fbdfd4d5b0e386c4e9c6a33ddbddac61ddb131e360194
          • MD5 SHA1 SHA512 SSDEEP

          SDL2_mixer.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\SDL2_mixer.dll
          • Size 285KB
          • SHA256 2a0fc5e9f72c2eaec3240cb82b7594a58ccda609485981f256b94d0a4dd8d6f8
          • MD5 SHA1 SHA512 SSDEEP

          SDL2_ttf.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\SDL2_ttf.dll
          • Size 1.4MB
          • SHA256 821b1a0cb96c613bb452536e89bae920787578c8688bd24c8e17103b47780866
          • MD5 SHA1 SHA512 SSDEEP

          VCRUNTIME140.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\VCRUNTIME140.dll
          • Size 116KB
          • SHA256 4d292623516f65c80482081e62d5dadb759dc16e851de5db24c3cbb57b87db83
          • MD5 SHA1 SHA512 SSDEEP

          VCRUNTIME140_1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\VCRUNTIME140_1.dll
          • Size 48KB
          • SHA256 a113f192195f245f17389e6ecbed8005990bcb2476ddad33f7c4c6c86327afe5
          • MD5 SHA1 SHA512 SSDEEP

          _asyncio.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_asyncio.pyd
          • Size 63KB
          • SHA256 76db93bd64cb4a36edb37694456f89bb588db98cf2733eb436f000b309eec3b2
          • MD5 SHA1 SHA512 SSDEEP

          _bz2.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_bz2.pyd
          • Size 82KB
          • SHA256 1be51ef2b5acbe490217aa1ff12618d24b95df6136c6844714b9ca997b4c7f9b
          • MD5 SHA1 SHA512 SSDEEP

          _cffi_backend.cp311-win_amd64.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_cffi_backend.cp311-win_amd64.pyd
          • Size 177KB
          • SHA256 59767b0918859beddf28a7d66a50431411ffd940c32b3e8347e6d938b60facdf
          • MD5 SHA1 SHA512 SSDEEP

          _ctypes.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_ctypes.pyd
          • Size 121KB
          • SHA256 3d43869a4507ed8ece285ae85782d83bb16328cf636170acb895c227ebb142ac
          • MD5 SHA1 SHA512 SSDEEP

          _decimal.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_decimal.pyd
          • Size 247KB
          • SHA256 23bdd07b84d2dbcb077624d6dcbfc66ab13a9ef5f9eebe31dc0ffece21b9e50c
          • MD5 SHA1 SHA512 SSDEEP

          _elementtree.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_elementtree.pyd
          • Size 125KB
          • SHA256 b4a866a63316a04e070d25acc055a1e4db9071e8e9fb6fe9cde019a8ef311ed5
          • MD5 SHA1 SHA512 SSDEEP

          _hashlib.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_hashlib.pyd
          • Size 63KB
          • SHA256 2ad55e11bddb5b65cdf6e9e126d82a3b64551f7ad9d4cbf74a1058fd7e5993bd
          • MD5 SHA1 SHA512 SSDEEP

          _lzma.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_lzma.pyd
          • Size 155KB
          • SHA256 663f1087c2ed664c5995a3ffa64546d2e33a0fce8a9121b48cc7c056b74a2948
          • MD5 SHA1 SHA512 SSDEEP

          _multiprocessing.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_multiprocessing.pyd
          • Size 33KB
          • SHA256 3c5b0823e30810aee47fdfad567491bc33dd640c37e35c8600e75c5a8d05ce2a
          • MD5 SHA1 SHA512 SSDEEP

          _overlapped.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_overlapped.pyd
          • Size 50KB
          • SHA256 4990f62e11c0a5ab15a9ffce9d054f06d0bc9213aea0c2a414a54fa01a5eb6dc
          • MD5 SHA1 SHA512 SSDEEP

          _queue.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_queue.pyd
          • Size 31KB
          • SHA256 ac3b144d7d7c8ee39f29d8749c5a35c4314b5365198821605c883fd11807e766
          • MD5 SHA1 SHA512 SSDEEP

          _socket.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_socket.pyd
          • Size 77KB
          • SHA256 8f9ede5044643413c3b072cd31a565956498ca07cdd17fb6a04483d388fdad76
          • MD5 SHA1 SHA512 SSDEEP

          _sqlite3.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_sqlite3.pyd
          • Size 117KB
          • SHA256 d077e236b709b5242d62ce4923feddbfcc719ec26612ed474ed3b25ee290d0ac
          • MD5 SHA1 SHA512 SSDEEP

          _ssl.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_ssl.pyd
          • Size 172KB
          • SHA256 591589dadc659d1ad4856d16cd25dc8e57eaa085bf68eb2929f8f93aba69db1b
          • MD5 SHA1 SHA512 SSDEEP

          _tkinter.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_tkinter.pyd
          • Size 62KB
          • SHA256 a3488d90b5493dd0af5054750194cdeafbf05db42e881c78d92449932565308d
          • MD5 SHA1 SHA512 SSDEEP

          _uuid.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\_uuid.pyd
          • Size 24KB
          • SHA256 ce9e2a30c20e6b83446d9ba83bb83c5570e1b1da0e87ff467d1b4fc090da6c53
          • MD5 SHA1 SHA512 SSDEEP

          base_library.zip

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\base_library.zip
          • Size 1.4MB
          • SHA256 ce9b9f16ce0d9abdbac3307115d91eaf279c5152336ccbe8830151b41c802998
          • MD5 SHA1 SHA512 SSDEEP

          md.cp311-win_amd64.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\charset_normalizer\md.cp311-win_amd64.pyd
          • Size 10KB
          • SHA256 790a11aa270523c2efa6021ce4f994c3c5a67e8eaaaf02074d5308420b68bd94
          • MD5 SHA1 SHA512 SSDEEP

          md__mypyc.cp311-win_amd64.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\charset_normalizer\md__mypyc.cp311-win_amd64.pyd
          • Size 116KB
          • SHA256 3d9893aa79efd13d81fcd614e9ef5fb6aad90569beeded5112de5ed5ac3cf753
          • MD5 SHA1 SHA512 SSDEEP

          freetype.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\freetype.dll
          • Size 639KB
          • SHA256 1c487392d6d06970ba3c7b52705881f1fb069f607243499276c2f0c033c7df6f
          • MD5 SHA1 SHA512 SSDEEP

          libcrypto-3.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libcrypto-3.dll
          • Size 1.9MB
          • SHA256 b1b826f21cbc50d202a2db6d3bf85865852d3161560b55daa79c1363a377427a
          • MD5 SHA1 SHA512 SSDEEP

          libcrypto-3.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libcrypto-3.dll
          • Size 899KB
          • SHA256 c8ac5445ed41f9567fe8f10cfc83bf5408dbbb4aed6ff26b573c36352239ed2e
          • MD5 SHA1 SHA512 SSDEEP

          libffi-8.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libffi-8.dll
          • Size 38KB
          • SHA256 eff52743773eb550fcc6ce3efc37c85724502233b6b002a35496d828bd7b280a
          • MD5 SHA1 SHA512 SSDEEP

          libjpeg-9.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libjpeg-9.dll
          • Size 238KB
          • SHA256 3a224af540c96574800f5e9acf64b2cdfb9060e727919ec14fbd187a9b5bfe69
          • MD5 SHA1 SHA512 SSDEEP

          libmodplug-1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libmodplug-1.dll
          • Size 259KB
          • SHA256 0c1a9032812ec4c20003a997423e67b71ecb5e59d62cdc18a5bf591176a9010e
          • MD5 SHA1 SHA512 SSDEEP

          libogg-0.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libogg-0.dll
          • Size 25KB
          • SHA256 57abc4f6a9accdd08bf9a2b022a66640cc626a5bd4dac6c7c4f06a5df61ee1fe
          • MD5 SHA1 SHA512 SSDEEP

          libopus-0.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libopus-0.dll
          • Size 359KB
          • SHA256 771cae79410f7fcc4f993a105a18c4ed9e8cbddd6f807a42228d95f575808806
          • MD5 SHA1 SHA512 SSDEEP

          libopus-0.x64.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libopus-0.x64.dll
          • Size 431KB
          • SHA256 c84da836e8d92421ac305842cfe5a724898ed09d340d46b129e210bdc9448131
          • MD5 SHA1 SHA512 SSDEEP

          libopusfile-0.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libopusfile-0.dll
          • Size 45KB
          • SHA256 ccaaca81810bd2d1cab4692b4253a639f8d5516996db0e24d881efd3efdcc6a4
          • MD5 SHA1 SHA512 SSDEEP

          libpng16-16.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libpng16-16.dll
          • Size 206KB
          • SHA256 e688b4a4d18f4b6ccc99c6ca4980f51218cb825610775192d9b60b2f05eff2d5
          • MD5 SHA1 SHA512 SSDEEP

          libssl-3.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libssl-3.dll
          • Size 768KB
          • SHA256 2e9fbcd8f7fdc13a5179533239811456554f2b3aa2fb10e1b17be0df81c79006
          • MD5 SHA1 SHA512 SSDEEP

          libtiff-5.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libtiff-5.dll
          • Size 422KB
          • SHA256 ebfe97ac5ef26b94945af3db5ffd110a4b8e92dc02559bf81ccb33f0d5ebce95
          • MD5 SHA1 SHA512 SSDEEP

          libwebp-7.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\libwebp-7.dll
          • Size 437KB
          • SHA256 9a53563b6058f70f2725029b7dd2fe96f869c20e8090031cd303e994dfe07b50
          • MD5 SHA1 SHA512 SSDEEP

          portmidi.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\portmidi.dll
          • Size 41KB
          • SHA256 c9f8d9043ac1570b10f104f2d00aec791f56261c84ee40773be73d0a3822e013
          • MD5 SHA1 SHA512 SSDEEP

          pyexpat.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\pyexpat.pyd
          • Size 193KB
          • SHA256 58b95f03a2d7ec49f5260e3e874d2b9fb76e95ecc80537e27abef0c74d03cb00
          • MD5 SHA1 SHA512 SSDEEP

          python3.DLL

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\python3.DLL
          • Size 65KB
          • SHA256 920350a7c24c46339754e38d0db34ab558e891da0b3a389d5230a0d379bee802
          • MD5 SHA1 SHA512 SSDEEP

          python311.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\python311.dll
          • Size 2.6MB
          • SHA256 8f90c09c911b24c877601d48a0939c0e9b565737d6cbb5c3167f6b651958d997
          • MD5 SHA1 SHA512 SSDEEP

          python311.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\python311.dll
          • Size 2.1MB
          • SHA256 16867292c7336288dd4f32e2560d421595c0c22fe46977701b7fd321faafa4cc
          • MD5 SHA1 SHA512 SSDEEP

          select.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\select.pyd
          • Size 29KB
          • SHA256 fb06ac13f8b444c3f7ae5d2af15710a4e60a126c3c61a1f1e1683f05f685626c
          • MD5 SHA1 SHA512 SSDEEP

          sqlite3.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\sqlite3.dll
          • Size 1.3MB
          • SHA256 4265d908e134b906251db07fb8c35f9a68bed5d08876bed39c2be7aeb569fbe3
          • MD5 SHA1 SHA512 SSDEEP

          tcl86t.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\tcl86t.dll
          • Size 1.5MB
          • SHA256 dd6fa6b87aea0f76ca64c5e8aec27a921c955d86860c56329712df48fb431685
          • MD5 SHA1 SHA512 SSDEEP

          tk86t.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\tk86t.dll
          • Size 1.5MB
          • SHA256 20139f4c327711baf18289584fa0c8112f7bb3ba55475bded21f3d107672ed94
          • MD5 SHA1 SHA512 SSDEEP

          unicodedata.pyd

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\unicodedata.pyd
          • Size 1.1MB
          • SHA256 f28ac3e3ad02f9e1d8b22df15fa30b2190b080261a9adc6855248548cd870d20
          • MD5 SHA1 SHA512 SSDEEP

          zlib1.dll

          • Path C:\Users\Admin\AppData\Local\Temp\_MEI46082\zlib1.dll
          • Size 106KB
          • SHA256 b1f58a17f3bfd55523e7bef685acf5b32d1c2a6f25abdcd442681266fd26ab08
          • MD5 SHA1 SHA512 SSDEEP

          __PSScriptPolicyTest_3dypoyfo.gjd.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3dypoyfo.gjd.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          Bear Defense.exe

          • Path C:\Users\Admin\Bear Defense.exe
          • Size 13.1MB
          • SHA256 777390c1eb4685904e73e5f8497704616d815e21dfc8a82dad525dcc7a688b30
          • MD5 SHA1 SHA512 SSDEEP

          memory/4032-1240-0x00007FFC71BE0000-0x00007FFC71E4C000-memory.dmp

          memory/4032-1244-0x00007FFC71840000-0x00007FFC719C2000-memory.dmp

          memory/4032-1246-0x00007FFC6F3F0000-0x00007FFC714A6000-memory.dmp

          memory/4032-1245-0x00007FFC717B0000-0x00007FFC71801000-memory.dmp

          memory/4032-1243-0x0000000062E80000-0x0000000062EA4000-memory.dmp

          memory/4032-1242-0x0000000068B40000-0x0000000068B7C000-memory.dmp

          memory/4032-1241-0x000000006A880000-0x000000006A8A7000-memory.dmp

          memory/4968-1226-0x00007FFC6DAE0000-0x00007FFC6E5A1000-memory.dmp

          memory/4968-1233-0x00007FFC6DAE0000-0x00007FFC6E5A1000-memory.dmp

          memory/4968-1230-0x0000016EEBB30000-0x0000016EEBB40000-memory.dmp

          memory/4968-1228-0x0000016EEBB30000-0x0000016EEBB40000-memory.dmp

          memory/4968-1229-0x0000016EEBB30000-0x0000016EEBB40000-memory.dmp

          memory/4968-1227-0x0000016EEBB30000-0x0000016EEBB40000-memory.dmp

          memory/4968-1216-0x0000016ED3870000-0x0000016ED3892000-memory.dmp