Analysis

  • max time kernel
    149s
  • max time network
    156s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20250217-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20250217-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    21/02/2025, 22:04

General

  • Target

    d.msi

  • Size

    2.9MB

  • MD5

    5297df4268c31105df6d2fc39437d294

  • SHA1

    df8d187c76abf86b8c7f3061723232424c6a7f2c

  • SHA256

    696ed13d119273602770a67ac8015544cabba93a8316816e4fbdda5794b35399

  • SHA512

    5fdd3cc4dfa1962a769138fece7a1ca9262d6503fe3a10838b6356d8fbe7081f841beb30bffbf0cc4966f863e63d420c05f9f903c7621da6130fea2e7ed85ad5

  • SSDEEP

    49152:wL51ahTWxFOlm43he+4Xkt1i1XkIZ9fm5urK7olHgnIxQQ6brit:A8h8ME4xr461ckZPoxgnsSa

Malware Config

Extracted

Family

remcos

Botnet

v2

C2

185.157.162.126:1995

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    qsdazeazd-EL00KX

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Detects HijackLoader (aka IDAT Loader) 1 IoCs
  • HijackLoader

    HijackLoader is a multistage loader first seen in 2023.

  • Hijackloader family
  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Remcos family
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Enumerates connected drives 3 TTPs 46 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Windows directory 8 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Installer Packages 2 TTPs 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Checks SCSI registry key(s) 3 TTPs 5 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Windows\system32\msiexec.exe
    msiexec.exe /I C:\Users\Admin\AppData\Local\Temp\d.msi
    1⤵
    • Enumerates connected drives
    • Event Triggered Execution: Installer Packages
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    PID:2876
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Adds Run key to start application
    • Enumerates connected drives
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4104
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:2
      2⤵
        PID:4016
      • C:\Users\Admin\AppData\Local\IXXinstall\EHttpSrv.exe
        "C:\Users\Admin\AppData\Local\IXXinstall\EHttpSrv.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • Executes dropped EXE
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:1524
        • C:\Windows\SysWOW64\cmd.exe
          C:\Windows\SysWOW64\cmd.exe
          3⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:1012
          • C:\Users\Admin\AppData\Local\IXXinstall\EHttpSrv.exe
            C:\Users\Admin\AppData\Local\IXXinstall\EHttpSrv.exe
            4⤵
            • Loads dropped DLL
            • System Location Discovery: System Language Discovery
            PID:652
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:3036

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Config.Msi\e586a5e.rbs

      Filesize

      10KB

      MD5

      330cc6ada4706a7ac91ccfb11608a080

      SHA1

      42c2b0a90c1129f53b39b807ec0bf60791005536

      SHA256

      b7957d0e77862056c93e3943474dacd1394b13f0762254a854746c994a677350

      SHA512

      21e0e8b27f6ed502aab2dc45fbddd4220840e979d9e6b0aee39a3ee9570dcbc487a29670d69eb2c5b11c7d1af1e0c15bb7b2f5620a9f4a10dc58a43c3ca3917a

    • C:\Users\Admin\AppData\Local\IXXinstall\EHttpSrv.exe

      Filesize

      20KB

      MD5

      9329ba45c8b97485926a171e34c2abb8

      SHA1

      20118bc0432b4e8b3660a4b038b20ca28f721e5c

      SHA256

      effa6fcb8759375b4089ccf61202a5c63243f4102872e64e3eb0a1bdc2727659

      SHA512

      0af06b5495142ba0632a46be0778a7bd3d507e9848b3159436aa504536919abbcacd8b740ef4b591296e86604b49e0642fee2c273a45e44b41a80f91a1d52acc

    • C:\Users\Admin\AppData\Local\IXXinstall\MFC80U.DLL

      Filesize

      1.0MB

      MD5

      686b224b4987c22b153fbb545fee9657

      SHA1

      684ee9f018fbb0bbf6ffa590f3782ba49d5d096c

      SHA256

      a2ac851f35066c2f13a7452b7a9a3fee05bfb42907ae77a6b85b212a2227fc36

      SHA512

      44d65db91ceea351d2b6217eaa27358dbc2ed27c9a83d226b59aecb336a9252b60aec5ce5e646706a2af5631d5ee0f721231ec751e97e47bbbc32d5f40908875

    • C:\Users\Admin\AppData\Local\IXXinstall\audiogram.tif

      Filesize

      877KB

      MD5

      5124236fd955464317fbb1f344a1d2f2

      SHA1

      fe3a91e252f1dc3c3b4980ade7157369ea6f5097

      SHA256

      ed1389002cdf96c9b54de35b6e972166ee3296d628943fd594a383e674c5cba6

      SHA512

      2b2ac23244b16f936ef9a4049586f58c809fcc4391a56390cc5db2e8d96140001e0b977680ed1d8b0ab9c410e865a880209e22add8d42e563dc40bc91236b252

    • C:\Users\Admin\AppData\Local\IXXinstall\http_dll.dll

      Filesize

      1.9MB

      MD5

      fe47e255c704b20cb20c8ed93ec94d47

      SHA1

      ed7d26624b3cfaa72cf7d3bc59d26845fb84247a

      SHA256

      b0d665cb466e10ef90e1d79a39cb655ebe785d0cefc074f7a22d04936b681879

      SHA512

      55813a4b755773f98991b47294fed03b23d5bee9af3ef98727b7345882fe0d9976546f46847fbc30119e7c62ce7ee8ae21f54065922041cf8d42364e607bc1c0

    • C:\Users\Admin\AppData\Local\Temp\6364b9c5

      Filesize

      1.0MB

      MD5

      131c7e7278b4d6a985fabc43d93a47ff

      SHA1

      5126988d149f6c16be54d425beb9343dbc9d0070

      SHA256

      7c9488ecb4aa5123d1b0599c375fd0fdfc5cb2b40351f5957592794e3508c3d9

      SHA512

      53c585ecec3bfea2a9dc23fcc3b967dcf8856ba423b5157631fbbbb72780abb7b91bc710c7f936f3e86849af270fdc876f5ed9e61373114b0d7386a372247f53

    • C:\Windows\Installer\e586a5d.msi

      Filesize

      2.9MB

      MD5

      5297df4268c31105df6d2fc39437d294

      SHA1

      df8d187c76abf86b8c7f3061723232424c6a7f2c

      SHA256

      696ed13d119273602770a67ac8015544cabba93a8316816e4fbdda5794b35399

      SHA512

      5fdd3cc4dfa1962a769138fece7a1ca9262d6503fe3a10838b6356d8fbe7081f841beb30bffbf0cc4966f863e63d420c05f9f903c7621da6130fea2e7ed85ad5

    • \??\GLOBALROOT\Device\HarddiskVolumeShadowCopy2\System Volume Information\SPP\metadata-2

      Filesize

      24.0MB

      MD5

      23c2c23c60878df2ffc41f3223a2f738

      SHA1

      571f37172bda7972c8aea84cd8d81eb61a38a9ef

      SHA256

      f8a94ea8d96bc9b97439f3ebe1581f3bd806c8fe7d7a41eb96eb879944a02493

      SHA512

      4740c9c5ce6bd6fbaae13b349e29c3cf6762d4b02a87d2af18da24ca6fb0e2df0fe1edcc77ac9c565acb8bd5c83f51493fb2ed43741eb5c33ffe2fb3ce9d2876

    • \??\Volume{b9afd8f3-0000-0000-0000-d08302000000}\System Volume Information\SPP\OnlineMetadataCache\{a71562b1-bd08-4ac1-ae15-c75c21d14513}_OnDiskSnapshotProp

      Filesize

      6KB

      MD5

      428d40c11308c2df112ea2e6cc4343bc

      SHA1

      e237b18ec1edabcc6d3aabed6bacece553969fce

      SHA256

      32b11fdc9ec525f5456be2ca83ca146a591951b7c7f7b13241b72eac912dbaed

      SHA512

      ac61f45cc5c85d4a618562e2d8b75aabbe0097da0b491e64259b8953cdb1c27a1f12d86daba52f83f94e049318ddfa908c06d1c33276af355c93533f761fc92a

    • memory/652-49-0x00007FFB190F0000-0x00007FFB192E8000-memory.dmp

      Filesize

      2.0MB

    • memory/652-61-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-62-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-64-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-47-0x0000000072DD0000-0x0000000074023000-memory.dmp

      Filesize

      18.3MB

    • memory/652-63-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-50-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-56-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-57-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-58-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-59-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/652-60-0x0000000000410000-0x0000000000494000-memory.dmp

      Filesize

      528KB

    • memory/1012-45-0x00000000748E0000-0x0000000074A5B000-memory.dmp

      Filesize

      1.5MB

    • memory/1012-43-0x00007FFB190F0000-0x00007FFB192E8000-memory.dmp

      Filesize

      2.0MB

    • memory/1524-38-0x00000000748E0000-0x0000000074A5B000-memory.dmp

      Filesize

      1.5MB

    • memory/1524-37-0x00000000748E0000-0x0000000074A5B000-memory.dmp

      Filesize

      1.5MB