Analysis

  • max time kernel
    99s
  • max time network
    177s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    11-11-2024 12:40

General

  • Target

    OpenShellSetup_4_4_191.exe

  • Size

    7.9MB

  • MD5

    e0484fd1e79a0227a5923cdc95b511ba

  • SHA1

    bea0cb5c42adbde14e8cf50b64982e1877c7855d

  • SHA256

    9e9c32badb52444ca8a8726aef7c220ff48de8c7916cdfdca4dff6e009ac1f0c

  • SHA512

    80f8b0ac16dfbf7df640a69b0f05ec9e002e09ed1d7c84d231db00422972c5a02ddef616570d4e7488f697c28933bbf27e5175db61b8cbd2403203b6e30bf431

  • SSDEEP

    196608:B+s5T8f3Hb+IcrthtV80y85WDe+qHw7aJvRt5Oj8GWDAqr:BbT8j+9JkNDJQGuRFDj

Malware Config

Signatures

  • Event Triggered Execution: Component Object Model Hijacking 1 TTPs

    Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 6 IoCs
  • Modifies system executable filetype association 2 TTPs 10 IoCs
  • 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.

  • Installs/modifies Browser Helper Object 2 TTPs 2 IoCs

    BHOs are DLL modules which act as plugins for Internet Explorer.

  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 40 IoCs
  • Drops file in Windows directory 12 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 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.

  • Modifies Internet Explorer settings 1 TTPs 4 IoCs
  • Modifies data under HKEY_USERS 3 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\OpenShellSetup_4_4_191.exe
    "C:\Users\Admin\AppData\Local\Temp\OpenShellSetup_4_4_191.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3144
    • C:\Windows\SysWOW64\msiexec.exe
      msiexec.exe /i "C:\ProgramData\OpenShellSetup64_4_4_191.msi"
      2⤵
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      PID:1884
  • C:\Windows\system32\msiexec.exe
    C:\Windows\system32\msiexec.exe /V
    1⤵
    • Adds Run key to start application
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5448
    • C:\Windows\system32\srtasks.exe
      C:\Windows\system32\srtasks.exe ExecuteScopeRestorePoint /WaitForRestorePoint:4
      2⤵
        PID:3408
      • C:\Windows\syswow64\MsiExec.exe
        "C:\Windows\syswow64\MsiExec.exe" /Y "C:\Program Files\Open-Shell\ClassicExplorer32.dll"
        2⤵
        • Loads dropped DLL
        • Installs/modifies Browser Helper Object
        • System Location Discovery: System Language Discovery
        • Modifies Internet Explorer settings
        • Modifies registry class
        PID:4568
      • C:\Windows\System32\MsiExec.exe
        "C:\Windows\System32\MsiExec.exe" /Y "C:\Program Files\Open-Shell\ClassicExplorer64.dll"
        2⤵
        • Loads dropped DLL
        • Installs/modifies Browser Helper Object
        • Modifies Internet Explorer settings
        • Modifies registry class
        PID:1052
      • C:\Windows\syswow64\MsiExec.exe
        "C:\Windows\syswow64\MsiExec.exe" /Y "C:\Windows\SysWOW64\StartMenuHelper32.dll"
        2⤵
        • Loads dropped DLL
        • Modifies system executable filetype association
        • System Location Discovery: System Language Discovery
        • Modifies registry class
        PID:3776
      • C:\Windows\System32\MsiExec.exe
        "C:\Windows\System32\MsiExec.exe" /Y "C:\Windows\system32\StartMenuHelper64.dll"
        2⤵
        • Loads dropped DLL
        • Modifies system executable filetype association
        • Modifies registry class
        • Suspicious use of AdjustPrivilegeToken
        PID:2800
      • C:\Program Files\Open-Shell\StartMenu.exe
        "C:\Program Files\Open-Shell\StartMenu.exe"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:6012
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Checks SCSI registry key(s)
      • Suspicious use of AdjustPrivilegeToken
      PID:2948
    • C:\Windows\SysWOW64\DllHost.exe
      C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
      1⤵
      • System Location Discovery: System Language Discovery
      PID:5700

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Config.Msi\e581b64.rbs

      Filesize

      19KB

      MD5

      aece0585c07dc13cd9b6b6d8db424a3a

      SHA1

      9437917e695687d65da20ba14d4b52e40b915543

      SHA256

      659bd190bdd30933393f8b15c85535df9131537779df24e9d6aea65b97398bdd

      SHA512

      68d0c166e528248df9548726f1c8a49e726e45549c356cd19996924de68f25b365b86dfb68eb1b2f1fd7fbc739ed6c5f60e90518cd2573de922d59709571a4b7

    • C:\Program Files\Open-Shell\ClassicExplorer32.dll

      Filesize

      863KB

      MD5

      a805193aed76942c667a798f9dd721fc

      SHA1

      3d2f702b16cb22d5918f6d51585a871fb3b3f900

      SHA256

      97eaeeee63423d4b11f0331666609483c946fb378810a140a830e8acfa80fc89

      SHA512

      0a86f2913e28131e1d8005d07aa712f733dbc19003fa9bf7af0761ff4e6c8e544b593147e53020f32282787621c5bb5848d909c5d4fa8e27bc7df6c9b73a021e

    • C:\Program Files\Open-Shell\ClassicExplorer64.dll

      Filesize

      964KB

      MD5

      950ff69adc1b8eec1bd8d502615b0ba6

      SHA1

      edb3916b7ada6aa0e765c6f70c39e182b8d45dfd

      SHA256

      9f2e29f9ea1c71b434d9a473c5c8107ec7738d7c6f3bd98587ed2733869bc64e

      SHA512

      f053d5db64fc7e0b206ac4ee07a343c6ae46dcec0105689bee4b152a297750c52980d04ab02acedaa60723b38da746b4850a08b8e127f5919e51be86e423b711

    • C:\Program Files\Open-Shell\ExplorerL10N.ini

      Filesize

      98KB

      MD5

      6ed13b9c1719b252e735ba7e33280e67

      SHA1

      f3753deab4d99dbee4821a8a70fe6e978e1a45f6

      SHA256

      b351158059f3d94c112863defad9063c5cdb81dea0b47530809ef4d8de4b68ab

      SHA512

      f529034e5853624f7bcce9a7ab93c205ec8fd1c671009e0a0b767f3268525ec2b91e75eeda2eb5f9f4c58a6d713b56e09a23aefd52d4b51eadd1fcef2c016afc

    • C:\Program Files\Open-Shell\Start Menu Settings.lnk

      Filesize

      1KB

      MD5

      31058d2fc4fe66e5c30ade3e2af986e1

      SHA1

      042bd833000cc57fe45db1782db8af1670ef12ca

      SHA256

      8afe7202831a9597ec981cd6003de71bd03d8efa4fa36198aaea41caecf063bb

      SHA512

      4dcccbb6a20c35ea8753224110777d51e53f51349aa8353d8a6c5543822f23de66ad68e1b59d04bdab4942ce9ef224904ba55e71861a86fa3cb45ef254936788

    • C:\Program Files\Open-Shell\Start Menu Settings.lnk~RFe581eed.TMP

      Filesize

      1KB

      MD5

      314e3fbcc11216d4d5a81d586c1dd9e2

      SHA1

      fcc92b3e56f7dbbdfd6a56922d7af1b921b51e23

      SHA256

      097a2efab50fdd9e428cb86edab6055b2abfdcea465d8228f90921c052509170

      SHA512

      c84cbc182708626bf8f3c187eb6e49ed9df84c390b9d6d7e222a89ea9c42a999361002741973e94e08386de9ff650189399addea657aefa588f1d9883c13781b

    • C:\Program Files\Open-Shell\Start Screen.lnk

      Filesize

      1KB

      MD5

      8955144decf085cf1bbe50bf534cbde6

      SHA1

      482737fbe6acc74d59c44fb4739429ef61078b72

      SHA256

      cf17b08fc9dafb5a5d7b7a9a8b642c4210df5aa34aee0cf73db2f2152b26b629

      SHA512

      73e19f13d28ee3780e801159b051cc3381bd495156f7040632b912afe4906c8eb351c12de381219a3b9a339b76069e50eee263c8bc6f99620f05a63391715b63

    • C:\Program Files\Open-Shell\Start Screen.lnk

      Filesize

      2KB

      MD5

      d656408e9e26c6789cf1e64768ac072f

      SHA1

      939361d6ebfd216fd0db891cfd30bc950f47682f

      SHA256

      caaa10c1cefcd2dc1d130d350f172f6da485ddcdc58b62287c6046f536b5142d

      SHA512

      328bd6fca691f1f235efd839f05cab682a39bd4a05008a84a5fa10cebaf9eb7c341a9d9526201f3c4ccb2844203ee33298d408ab7e4280dfae2f29282c4278dd

    • C:\Program Files\Open-Shell\Start Screen.lnk

      Filesize

      2KB

      MD5

      a6155a47f9d781c16c65f1f5911b1793

      SHA1

      fb3d84b4c48eeb14a9d5b9c17318ad15598b40f3

      SHA256

      0181251cb63ccb2fd613e2d31d86de85f8f127967fff6c4ad02d04cc07a9266f

      SHA512

      391893733330523a90a0f93cd1b282bc27ed7f7cd0c95db39b1e6a6d6ff6f2a28b63b6d3e4181e5bb4bd673c917e10e464f087518d638ec5e7470a4e57102284

    • C:\Program Files\Open-Shell\Start Screen.lnk~RFe581f0c.TMP

      Filesize

      1KB

      MD5

      b542e48638da5c7d1c40f8319eb56223

      SHA1

      7bbe16b9b87e7112673ba30c2f17a82a5fb05b8b

      SHA256

      8333404eee4074a0969badefe5c72e24e82fd444531cd0c973015988be6f3b23

      SHA512

      6be2fa1851f4b4b08b47ce1b7c84ad7ba89456deed45d33f41ca02b26e96dde47a3ecd9a5a7728a7cc1a1ce5b1400615af989d2581050fe9b544351b38a2b840

    • C:\Program Files\Open-Shell\StartMenu.exe

      Filesize

      259KB

      MD5

      9aca92d31344210995d18ac75f7df752

      SHA1

      fec9f414f3c399f8384ad6a32d0b60adde85d8d9

      SHA256

      df5fe5f0b4e28d0e555e20764fe78fdf99970271b87f42e81b208e2fee9e31cf

      SHA512

      ddfb706f8d0b96350a2e2d527428b2e02d0715e33e9d4e16f1add62f1cd6b1da1ff3ed2ac4cf26e40625c7b94738ab9f109709b3f2f91b9298ec720a304470dc

    • C:\Program Files\Open-Shell\StartMenuDLL.dll

      Filesize

      2.7MB

      MD5

      e29ab21b4d9266502677b9837ad23346

      SHA1

      939e7bb40623f04dd3d75f4685a543437512771a

      SHA256

      808861ed17396b3d82d3c38769710390d84ab3ef89d6dfbd60765939938e7185

      SHA512

      7047f4d4c0cbb5ed001b3de5aee937048682b1a9e116bfb732dc0d2a28bb640fd3e3d9e30f0b7281faf7e79abe71c2280af3e365981a000a3a36e0bfbb0b6dcd

    • C:\Program Files\Open-Shell\StartMenuHelperL10N.ini

      Filesize

      11KB

      MD5

      29221f620ea6b5893add15dd6c307684

      SHA1

      97c31bb9585a0896e1fcea8efa3f05ff16823da2

      SHA256

      53cafbc10e671b2885775dc7d7b66e93156a4fb661aee95e03c2dd74ea99fa84

      SHA512

      b4c98f1352d7f8c60eb785b1849673bfa880242fe3daceb2bf9e69ec7ddd6c707df905c7b18b2888d87ba47a36f967761c8ff69d8082ebbf5dbf3a21aba55f42

    • C:\Program Files\Open-Shell\StartMenuL10N.ini

      Filesize

      286KB

      MD5

      673bb428b6d3fab8cba07890cad09d0e

      SHA1

      45039820289bdb485bb761e9b267f6de9e18a26c

      SHA256

      ff4ba6dc92215a59e2d84e2ec489bb5cdc3b3799f08d83a0b27639117e25ce33

      SHA512

      2da16a2be769290f457b471155b6da838ce089c85a8d0fdd8c65b58a20212eb719893a16cbcb9510f01c6a10eb23c7b53e396f97445cb802a39b9c8ed4f0962e

    • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Open-Shell\Classic Explorer Settings.lnk

      Filesize

      1KB

      MD5

      9be199179ddbf7fb1cb031e02b7810a2

      SHA1

      2763d43e843db623e8ac66a0291f8ab6966db458

      SHA256

      50cca3af6bd371d98287d22605fb3100732f01bd93a855a6ac26bbcbffeb571e

      SHA512

      19cec6dc1eb6b7ac3542586d2b19b9eb9e0c2d3db0cb967f523d4fbc39b629e6c00f0c5f897f5aaa3d82d79103476502de489ce77788235f2516d59fb2cb0cb8

    • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Open-Shell\Classic Explorer Settings.lnk~RFe581ebe.TMP

      Filesize

      1KB

      MD5

      754f1a1fb76a81a57ba106d7ac471ba0

      SHA1

      a0c2cf4fd795b782a6e74445cd5bbd3b2700fc97

      SHA256

      9fe682374af22ad10027d5697cf78ca5de4d768f94b075226457bab5a02b18cc

      SHA512

      d529fc0feb72497575bf04f24bc38dc4aa335b766d334fdeced128da44276f062c49b4e403b7912783ae728dae1935c54c551e01a9b7013e142369b6c1f27f76

    • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Open-Shell\Open-Shell Menu Settings.lnk

      Filesize

      1KB

      MD5

      d0c731956cc3c4db5d7b4312afceef58

      SHA1

      e45105773341184cb6562f7c1dc63a1f61ee8fb2

      SHA256

      35d210d3dfa89109ca33851f4181cbdad9e928c171c37106f8cb0d1879eba344

      SHA512

      6f09610df0220b9b9f551c2517eccb4ad862b3b1f0f25c0c0010e2d10d69a7d01c5a285a1c2564e9cf4170ae058750310e5759d181a0b90d4e572a6e8cd035ad

    • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Open-Shell\Open-Shell Menu Settings.lnk~RFe581ece.TMP

      Filesize

      1KB

      MD5

      e3865a2c2c786a91d0162c79c1aca3c8

      SHA1

      899530be5d29777d62c6f71aa960334e74deb495

      SHA256

      5ed02b3674d15264fc9f409abc7150d48486d8478d00eafcbe44fb93c6db7dbb

      SHA512

      1d4278b0b4db08dc1f856aa579e015b9078304ee1bf46edda2566f405ae936494e92c3f5297b8c90e926714201305586a76adc892dd181c440ac33508406ec42

    • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Open-Shell\Open-Shell Update.lnk

      Filesize

      1KB

      MD5

      6638221f57c3c89df9406a83568c6a15

      SHA1

      bfccaf5d8c3e922e7ed84bda5b1dd2af1a294b8b

      SHA256

      b27b99311a5d9779120417c7d47dd4f6d310381c34a5415fc7177e7fdf5c3cf8

      SHA512

      184f8a521dbdd8d7e709a7656af720f0207724975e61b064a85b1dc5bee530257e43b5e1e306211fa8c6105184ff1a3592a799072b4389a551238b84da910051

    • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Open-Shell\Open-Shell Update.lnk

      Filesize

      1KB

      MD5

      4d713bb470b4577521b845d57eca1e66

      SHA1

      5d4060386decba1b12aecf94b1e0f321c7b062eb

      SHA256

      3e6093f2564ec40400ad0a441a4981481804de4088dd615073996534b3918fad

      SHA512

      fae241efe18c0d2e60191d4537c673d98f75cb75dc62ec96834814a807a2bea2f6eb62d0a25bcaa875fbb4df0e271e60462add75fa678e43e996f98afd1ef277

    • C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Open-Shell\Open-Shell Update.lnk~RFe581eae.TMP

      Filesize

      1KB

      MD5

      66eb13ba257abc2a8e06c49a1f20d60f

      SHA1

      bef0002947f04f5d96900f5649209dfa4e2c6b60

      SHA256

      8e885371a7da2380639960a0ef2e7a228803e85990ba2d347ef5acefd0e0f449

      SHA512

      0292e81d2f9b4c572cfff1006563e2c194eeed9f7e9ea1d728c1e189757842c34efbf79b75a3851f3067454a993545d16e1389af9ff24a92eee8651e09dd0ce0

    • C:\ProgramData\OpenShellSetup64_4_4_191.msi

      Filesize

      5.3MB

      MD5

      cc25bc2f1b5dec7e9e7ab3289ed92cc7

      SHA1

      449e9de44f4b640f1b7cd4ee2f35ca3d15f77ff2

      SHA256

      25aa0c605989a6a91ebe0eaafcf55843401e84ed5cc52d8b3ee4b2fa19ba2313

      SHA512

      e51dcaf8d622f87a9bb5a10a7156d34fb56d13ff26fc9a5d63986d353ae7dad9de3c637d1a1a04d2908d2c378f63873962043667c48607035cd4439f86c11c2a

    • C:\Windows\SysWOW64\StartMenuHelper32.dll

      Filesize

      351KB

      MD5

      b7c7f2bf76b2220839af735e2b58fefc

      SHA1

      16631df5f62096b039fc1996066805721b622407

      SHA256

      a96b405675d89eb855c856ea9f97d8a082f90e3254d5981efa88a282feafd875

      SHA512

      6df5bdf1a752f3cf801075d7a5cbc690b2e0f142e46d72ec789eb3402065e3e481818e8bc221ffdddcdfdc634eaadeffe415593c23c4a4639aebb45a25487fed

    • C:\Windows\system32\StartMenuHelper64.dll

      Filesize

      426KB

      MD5

      22c9a786f3ff34275c80876b8ac5cc10

      SHA1

      beb6f4f28b98910b2031c37d7cec385543045614

      SHA256

      b043e4de9b6d255deae363118f893cd92e690badb9a16c3b5faa07e4a2805cca

      SHA512

      92f2db5cc4d92a3d9dc433af7d8104341dd85079ca9a6d772b374caf546a06935501bbcb0e72af0679470924529d58d1e5c4198fe1cf995311c546630ef99397

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

      Filesize

      23.9MB

      MD5

      f3850f39d6377a38bc277536dde95a5c

      SHA1

      e8049f73c950a3bad79dcc4856d1f56e93becff1

      SHA256

      7536c7a81bfe16bb4847671d849e97fcd039eb5a825d987717901b04283db4d6

      SHA512

      ed2b3c5a4effe76bb5664313ce5b8f80e9aaf2c7850c46f4180c24c818e4219eb7c4d3970bf40cf105b92ab38cf1b7311de3040af36ddeff0ab4cefa1d26ef23

    • \??\Volume{852b386b-0000-0000-0000-d01200000000}\System Volume Information\SPP\OnlineMetadataCache\{bbf54f04-479f-48d2-b40f-d48f63087acb}_OnDiskSnapshotProp

      Filesize

      6KB

      MD5

      12737097acbafe47802ab910ea9ab052

      SHA1

      3770ceeeb1fec4ad413f76dcbc3cf6ee3318d385

      SHA256

      33a0ff7588c2d1ca44562b3d34af40c4a9ea78add436de43f7110dc8466799a8

      SHA512

      414cd0a7b702850aba52de217a646dc580de8e22c9c21af991582b8143c1ac8a7a1f2ffcc61f298ae69537952546786d8eab5fa2b29d9bde8a09156d80fe3b06