Analysis

  • max time kernel
    51s
  • max time network
    53s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/06/2024, 01:00

General

  • Target
    0608a7559f895fab33ae65bbfbdc5bebd21eea984f76e1b5571c80906824d665.exe
  • Size 10.7MB
  • Sample240621-bc3kaaybjp
  • SHA256 0608a7559f895fab33ae65bbfbdc5bebd21eea984f76e1b5571c80906824d665
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Detects Monster Stealer. 3 IoCs
  • Monster

    Monster is a Golang stealer that was discovered in 2024.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 33 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Hide Artifacts: Hidden Files and Directories 1 TTPs 1 IoCs
  • Embeds OpenSSL 1 IoCs

    Embeds OpenSSL, may be used to circumvent TLS interception.

  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Kills process with taskkill 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 44 IoCs
  • Suspicious use of WriteProcessMemory 22 IoCs
  • Views/modifies file attributes 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0608a7559f895fab33ae65bbfbdc5bebd21eea984f76e1b5571c80906824d665.exe
    "C:\Users\Admin\AppData\Local\Temp\0608a7559f895fab33ae65bbfbdc5bebd21eea984f76e1b5571c80906824d665.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3632
    • C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\stub.exe
      "C:\Users\Admin\AppData\Local\Temp\0608a7559f895fab33ae65bbfbdc5bebd21eea984f76e1b5571c80906824d665.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:4728
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c "ver"
        3⤵
          PID:1764
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "wmic csproduct get uuid"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:2752
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic csproduct get uuid
            4⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3124
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "tasklist"
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:4400
          • C:\Windows\system32\tasklist.exe
            tasklist
            4⤵
            • Enumerates processes with tasklist
            • Suspicious use of AdjustPrivilegeToken
            PID:2824
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "attrib +h +s "C:\Users\Admin\AppData\Local\MonsterUpdateService\Monster.exe""
          3⤵
          • Hide Artifacts: Hidden Files and Directories
          • Suspicious use of WriteProcessMemory
          PID:4768
          • C:\Windows\system32\attrib.exe
            attrib +h +s "C:\Users\Admin\AppData\Local\MonsterUpdateService\Monster.exe"
            4⤵
            • Views/modifies file attributes
            PID:3644
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c "mshta "javascript:var sh=new ActiveXObject('WScript.Shell'); sh.Popup('The Program can\x22t start because api-ms-win-crt-runtime-|l1-1-.dll is missing from your computer. Try reinstalling the program to fix this problem', 0, 'System Error', 0+16);close()""
          3⤵
            PID:4952
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c "taskkill /F /IM chrome.exe"
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:2552
            • C:\Windows\system32\taskkill.exe
              taskkill /F /IM chrome.exe
              4⤵
              • Kills process with taskkill
              • Suspicious use of AdjustPrivilegeToken
              PID:4192

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            VCRUNTIME140.dll

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\VCRUNTIME140.dll
            • Size 96KB
            • SHA256 d66c3b47091ceb3f8d3cc165a43d285ae919211a0c0fcb74491ee574d8d464f8
            • MD5 SHA1 SHA512 SSDEEP

            _asyncio.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_asyncio.pyd
            • Size 62KB
            • SHA256 3b0661ef2264d6566368b677c732ba062ac4688ef40c22476992a0f9536b0010
            • MD5 SHA1 SHA512 SSDEEP

            _bz2.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_bz2.pyd
            • Size 81KB
            • SHA256 f178e29921c04fb68cc08b1e5d1181e5df8ce1de38a968778e27990f4a69973c
            • MD5 SHA1 SHA512 SSDEEP

            _cffi_backend.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_cffi_backend.pyd
            • Size 177KB
            • SHA256 52e5a0c3ca9b0d4fc67243bd8492f5c305ff1653e8d956a2a3d9d36af0a3e4fd
            • MD5 SHA1 SHA512 SSDEEP

            _ctypes.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_ctypes.pyd
            • Size 119KB
            • SHA256 92d7954d9099762d81c1ae2836c11b6ba58c1883fde8eeefe387cc93f2f6afb4
            • MD5 SHA1 SHA512 SSDEEP

            _hashlib.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_hashlib.pyd
            • Size 60KB
            • SHA256 1be5cfd06a782b2ae8e4629d9d035cbc487074e8f63b9773c85e317be29c0430
            • MD5 SHA1 SHA512 SSDEEP

            _lzma.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_lzma.pyd
            • Size 154KB
            • SHA256 80a6ebe46f43ffa93bbdbfc83e67d6f44a44055de1439b06e4dd2983cb243df6
            • MD5 SHA1 SHA512 SSDEEP

            _overlapped.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_overlapped.pyd
            • Size 47KB
            • SHA256 0606a0c5c4ab46c4a25ded5a2772e672016cac574503681841800f9059af21c4
            • MD5 SHA1 SHA512 SSDEEP

            _socket.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_socket.pyd
            • Size 75KB
            • SHA256 8046bf64e463d5aa38d13525891156131cf997c2e6cdf47527bc352f00f5c90a
            • MD5 SHA1 SHA512 SSDEEP

            _sqlite3.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_sqlite3.pyd
            • Size 95KB
            • SHA256 85de6d0b08b5cc1f2c3225c07338c76e1cab43b4de66619824f7b06cb2284c9e
            • MD5 SHA1 SHA512 SSDEEP

            _ssl.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_ssl.pyd
            • Size 155KB
            • SHA256 58b772b53bfe898513c0eb264ae4fa47ed3d8f256bc8f70202356d20f9ecb6dc
            • MD5 SHA1 SHA512 SSDEEP

            _uuid.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\_uuid.pyd
            • Size 23KB
            • SHA256 51dd1ea5e8cacf7ec4cadefdf685334c7725ff85978390d0b3d67fc8c54fe1db
            • MD5 SHA1 SHA512 SSDEEP

            _helpers.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\aiohttp\_helpers.pyd
            • Size 38KB
            • SHA256 04d56d6aa727665802283b8adf9b873c1dd76dfc7265a12c0f627528ba706040
            • MD5 SHA1 SHA512 SSDEEP

            _http_parser.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\aiohttp\_http_parser.pyd
            • Size 217KB
            • SHA256 580a004e93bed99820b1584dffaf0c4caa9fbbf4852ccded3b2b99975299367b
            • MD5 SHA1 SHA512 SSDEEP

            _http_writer.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\aiohttp\_http_writer.pyd
            • Size 34KB
            • SHA256 51490359d8079232565187223517eca99e1ce55bc97b93cf966d2a5c1f2e5435
            • MD5 SHA1 SHA512 SSDEEP

            _websocket.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\aiohttp\_websocket.pyd
            • Size 22KB
            • SHA256 4a5c9f8c3bca865df94ac93355e3ad492de03ae5fea41c1fa82fa4360c592ba5
            • MD5 SHA1 SHA512 SSDEEP

            md.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\charset_normalizer\md.pyd
            • Size 10KB
            • SHA256 9b3d70922dcfaeb02812afa9030a40433b9d2b58bcf088781f9ab68a74d20664
            • MD5 SHA1 SHA512 SSDEEP

            md__mypyc.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\charset_normalizer\md__mypyc.pyd
            • Size 117KB
            • SHA256 ad9bcc0de6815516dfde91bb2e477f8fb5f099d7f5511d0f54b50fa77b721051
            • MD5 SHA1 SHA512 SSDEEP

            _rust.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\cryptography\hazmat\bindings\_rust.pyd
            • Size 6.9MB
            • SHA256 2c7a31dec06df4eec6b068a0b4b009c8f52ef34ace785c8b584408cb29ce28fd
            • MD5 SHA1 SHA512 SSDEEP

            _frozenlist.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\frozenlist\_frozenlist.pyd
            • Size 84KB
            • SHA256 5c204f6966526af4dc0c0d6d29909b6f088c4fa781464f2948414d833b03094d
            • MD5 SHA1 SHA512 SSDEEP

            libcrypto-1_1.dll

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\libcrypto-1_1.dll
            • Size 3.3MB
            • SHA256 9c0a0a11629cced6a064932e95a0158ee936739d75a56338702fed97cb0bad55
            • MD5 SHA1 SHA512 SSDEEP

            libffi-7.dll

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\libffi-7.dll
            • Size 32KB
            • SHA256 f60dd9f2fcbd495674dfc1555effb710eb081fc7d4cae5fa58c438ab50405081
            • MD5 SHA1 SHA512 SSDEEP

            libssl-1_1.dll

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\libssl-1_1.dll
            • Size 682KB
            • SHA256 ed1c8769f5096afd000fc730a37b11177fcf90890345071ab7fbceac684d571f
            • MD5 SHA1 SHA512 SSDEEP

            _multidict.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\multidict\_multidict.pyd
            • Size 45KB
            • SHA256 74ec52418c5d38a63add94228c6f68cf49519666ae8bcb7ac199f7d539d8612c
            • MD5 SHA1 SHA512 SSDEEP

            python3.dll

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\python3.dll
            • Size 63KB
            • SHA256 5d78cd1365ea9ae4e95872576cfa4055342f1e80b06f3051cf91d564b6cd09f5
            • MD5 SHA1 SHA512 SSDEEP

            python310.dll

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\python310.dll
            • Size 4.3MB
            • SHA256 058925e4bbfcb460a3c00ec824b8390583baef0c780a7c7ff01d43d9eec45f20
            • MD5 SHA1 SHA512 SSDEEP

            select.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\select.pyd
            • Size 28KB
            • SHA256 68b80009ab656ffe811d680585fac3d4f9c1b45f29d48c67ea2b3580ec4d86a1
            • MD5 SHA1 SHA512 SSDEEP

            sqlite3.dll

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\sqlite3.dll
            • Size 1.4MB
            • SHA256 50825ea8b431d86ec228d9fa6b643e2c70044c709f5d9471d779be63ff18bcd0
            • MD5 SHA1 SHA512 SSDEEP

            stub.exe

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\stub.exe
            • Size 18.0MB
            • SHA256 2b8a2a3c53a019ca674287e1513a8e0851f2181699e37f385541537801ed1d41
            • MD5 SHA1 SHA512 SSDEEP

            unicodedata.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\unicodedata.pyd
            • Size 1.1MB
            • SHA256 2cf6c5dea30bb0584991b2065c052c22d258b6e15384447dcea193fdcac5f758
            • MD5 SHA1 SHA512 SSDEEP

            _quoting_c.pyd

            • Path C:\Users\Admin\AppData\Local\Temp\onefile_3632_133634052524309374\yarl\_quoting_c.pyd
            • Size 93KB
            • SHA256 eefb46501ef97baf29a93304f58674e70f5ccecafb183f230e5ce7872a852f56
            • MD5 SHA1 SHA512 SSDEEP

            memory/3632-107-0x00007FF6811A0000-0x00007FF681C78000-memory.dmp

            memory/3632-113-0x00007FF6811A0000-0x00007FF681C78000-memory.dmp

            memory/4728-108-0x00007FF7E9300000-0x00007FF7EA53F000-memory.dmp

            memory/4728-109-0x00007FF7E9300000-0x00007FF7EA53F000-memory.dmp