Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    18-02-2024 18:54

General

  • Target

    Neshta.exe

  • Size

    719KB

  • MD5

    8474039d83805eb7b447325c3a8d1ebb

  • SHA1

    a07d537f4253745a087709a9a07c449f84deed8d

  • SHA256

    b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649

  • SHA512

    3272091bbf123ba5e1592e8b2bd7740cddcb174fa158bc6980b25ee61d92387e94a25284736253f83a6eea78b427f6717e888e843db9d7759cfe9a7676576438

  • SSDEEP

    12288:q4UOTYQivI2qZ7aSgLwkFVpzUvest4ZEbjJLuhJVoM7SPd:bRTYVQ2qZ7aSgLwuVfstRJL6YM6

Malware Config

Extracted

Path

C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\Recovery_Instructions.html

Ransom Note
<html> <style type="text/css"> body { background-color: #f5f5f5; } h1, h3{ text-align: center; text-transform: uppercase; font-weight: normal; } /*---*/ .tabs1{ display: block; margin: auto; } .tabs1 .head{ text-align: center; float: top; padding: 0px; text-transform: uppercase; font-weight: normal; display: block; background: #81bef7; color: #DF0101; font-size: 30px; } .tabs1 .identi { font-size: 10px; text-align: center; float: top; padding: 15px; display: block; background: #81bef7; color: #DFDFDF; } .tabs .content { background: #f5f5f5; /*text-align: center;*/ color: #000000; padding: 25px 15px; font-size: 15px; font-weight: 400; line-height: 20px; } .tabs .content a { color: #df0130; font-size: 23px; font-style: italic; text-decoration: none; line-height: 35px; } .tabs .content .text{ padding: 25px; line-height: 1.2; } </style> <body> <div class="tabs1"> <div class="head" ><b>Your personal ID:</b></div> <div class="identi"> <span style="width:1000px; color: #ffffff; font-size: 10px;">815201A8D536FE72D39430928A60A1230816F34A22B41C6B8A44583FCA4F7F6442846FFD31107B21E4001F4FCFD6844C3B2E9DC208B0202950D058FF74DF334B<br>E3BCD5DB8950513C4B03B2D9730E23FEB365F2AB8A1321233189816BFD894ACB33C3CBE94F9DA272CB1364A7AAD4A5D807A400A358BB598464C4C0F34D28<br>C3A88B0FA0BF6EE50478F682692B2E08851AD9E876E54DB07C5745E5B7818A7F16B9402E09C6C1E6F62D06D39AA590A5236C17057E53EAC822D8E382B2F6<br>94644A4F84CA9C9429A9BE1491C137AA65752C3D2B581C6904E595E35653D7237F0107D4327B129F9BE942C29DEDD3AF7A0A0F91FC6033FEDC6E18552119<br>1EC6DE74316DAC07281BB85F7EF947F9375F8C5BEE5ACFA001CAC94E963DA7DA3E0F22B5FF61AC33DE1A1AF5F00E61F4E5C2DE0177811EE99692DD932519<br>E5CDF0D057ECD0A3BC91E6FCC22B2FC879CBBD8061A6FFC1102F54FC75C9A6A0CE81CF67E459A0431C477F68F144F03E3923CEA3C9516BA28CD8445A2B00<br>CB3EE1C09C95D8184F4CEC3E75049874F71E40CF99AAF9712B72BAEBF9E9E7AF26B524DF8D18A4136B759AE08D47845F0F4ED6D7E313E6EF77AB978C9BAF<br>6ABCA4E7526DDF08761112C13C998F723E8441114EEF29E0276525D1EFA9125B7030885880664B83AD5B01B3989ADA13713A625D7DC7BC88B42CD49909AA<br>902A3E3D736CF99AEC0FC6514720</span> <br> <!-- !!! dont changing this !!! --> </div> </div> <!-- --> <div class="tabs"> <!--tab--> <div class="tab"> <div id="tab-content1" class="content"> <div class="text"> <!--text data --> <b>/!\ YOUR COMPANY NETWORK HAS BEEN PENETRATED /!\</b><br> <b>All your important files have been encrypted!</b><br><br> <hr> Your files are safe! Only modified. (RSA+AES)<br><br> ANY ATTEMPT TO RESTORE YOUR FILES WITH THIRD-PARTY SOFTWARE<br> WILL PERMANENTLY CORRUPT IT.<br> DO NOT MODIFY ENCRYPTED FILES.<br> DO NOT RENAME ENCRYPTED FILES.<br><br> No software available on internet can help you. We are the only ones able to<br> solve your problem.<br><br> We gathered highly confidential/personal data. These data are currently stored on<br> a private server. This server will be immediately destroyed after your payment.<br> If you decide to not pay, we will release your data to public or re-seller.<br> So you can expect your data to be publicly available in the near future..<br><br> We only seek money and our goal is not to damage your reputation or prevent<br> your business from running.<br><br> You will can send us 2-3 non-important files and we will decrypt it for free<br> to prove we are able to give your files back.<br><br> <!--text data --> <hr> <b>Contact us for price and get decryption software.</b><br><br> <a>http://gvlay6u4g53rxdi5.onion/31-LPy3hdSfGLBgLSfGcKN9rubDKoa1VMK4-dbCnNSAul0fvq3TbbLW6VkdqGEHqT6g2</a><br> * Note that this server is available via Tor browser only<br><br> Follow the instructions to open the link:<br> 1. Type the addres "https://www.torproject.org" in your Internet browser. It opens the Tor site.<br> 2. Press "Download Tor", then press "Download Tor Browser Bundle", install and run it.<br> 3. Now you have Tor browser. In the Tor Browser open "{{URL}}". <br> 4. Start a chat and follow the further instructions. <br><br> <hr> <b>If you can not use the above link, use the email:</b><br> <a href="[email protected]">[email protected]</a> <br><a href="[email protected]">[email protected]</a> <br> <b>* To contact us, create a new mail on the site:</b> <a href="https://protonmail.com">protonmail.com<br> <hr> <b>Make contact as soon as possible. Your private key (decryption key) <br> is only stored temporarily.<br><br> IF YOU DON'T CONTACT US WITHIN 72 HOURS, PRICE WILL BE HIGHER.</b><br> </div> </div> </div> <!--tab--> <!--text data --> </div> </div> <!--tab--> </div> </div> </body> </html>

Signatures

  • Detect Neshta payload 7 IoCs
  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

  • MedusaLocker payload 1 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • UAC bypass 3 TTPs 2 IoCs
  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (203) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 4 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 24 IoCs

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

  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 3 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 6 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 7 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs
  • System policy modification 1 TTPs 3 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\Neshta.exe
    "C:\Users\Admin\AppData\Local\Temp\Neshta.exe"
    1⤵
    • Loads dropped DLL
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:1732
    • C:\Users\Admin\AppData\Local\Temp\3582-490\Neshta.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\Neshta.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Drops desktop.ini file(s)
      • Enumerates connected drives
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:2432
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:2736
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1704
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:2824
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2648
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Interacts with shadow copies
        PID:3044
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1972
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1884
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {396D24F5-511B-4E93-A44A-8826375E7996} S-1-5-21-452311807-3713411997-1028535425-1000:OZEMQECW\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2500
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:1748
  • C:\Program Files\Internet Explorer\iexplore.exe
    "C:\Program Files\Internet Explorer\iexplore.exe" C:\Users\Admin\Desktop\Recovery_Instructions.html
    1⤵
    • Modifies Internet Explorer settings
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2788
    • C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE
      "C:\Program Files (x86)\Internet Explorer\IEXPLORE.EXE" SCODEF:2788 CREDAT:275457 /prefetch:2
      2⤵
      • Loads dropped DLL
      • Modifies Internet Explorer settings
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:1616

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\MSOCache\ALLUSE~1\{90140~1\dwtrig20.exe

    Filesize

    547KB

    MD5

    cf6c595d3e5e9667667af096762fd9c4

    SHA1

    9bb44da8d7f6457099cb56e4f7d1026963dce7ce

    SHA256

    593e60cc30ae0789448547195af77f550387f6648d45847ea244dd0dd7abf03d

    SHA512

    ff4f789df9e6a6d0fbe12b3250f951fcf11e857906c65e96a30bb46266e7e1180d6103a03db2f3764e0d1346b2de7afba8259ba080057e4a268e45e8654dfa80

  • C:\MSOCache\All Users\{90140000-0011-0000-0000-0000000FF1CE}-C\Recovery_Instructions.html

    Filesize

    4KB

    MD5

    077a64fccd6bc77d75cc9266645b8f5d

    SHA1

    a1962b6aed3feda99104c310d994c95132da90da

    SHA256

    774cfdcc5f7a2a11bb3d8de646505bd246f17dfae06147c037c7503ea52b9a27

    SHA512

    ee92e0081bdf272ea75b64a37fc4682dbfdcb619effeee51c0f325422dae744b339383ffcbea0fe2025b79802429b3cb70304c0db1dba12708772402c9e1ebc6

  • C:\MSOCache\All Users\{90140000-0115-0409-0000-0000000FF1CE}-C\DW20.EXE

    Filesize

    864KB

    MD5

    5c8e52b8cec7121c5c2f0f15417eafcf

    SHA1

    9b25615db299bafbf8e88e53cbd80ce52a61564b

    SHA256

    8c7cb017b6ec0c6ff4d891533707024947950ab2f33d5c3c9f18b758636a3190

    SHA512

    e68815670156dba5706d72eb6af5b0cea4d172101d08aac7e7313229793bf1cb940b3ef326e36d45bef613ac16750e047709e8c284b4dcbd8519257274719163

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    d340a61ca36424b5daf059bd19a2816e

    SHA1

    0189f9e22d00e47c2b64b76150bec4494929f610

    SHA256

    4c6b5f09327f1659c3e3d716c9700d3fbdf0251aca08f6bb1b1638c4125b7954

    SHA512

    76c7018a4d88d4338e197c7fce7d1d60c62a2a30d5f57601b0c7d048d89c98e831a79f2b7b075a97b39d5d381550b50663171a7a885f0ac27fb300ecd4dad5ac

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    2f2ecefab8cbf9ca2aa89f071f3f1212

    SHA1

    b40fc1deb583f0022ba689780302fe1cd2853d7e

    SHA256

    a3ee5ce1cd1fe753c8cbac3dcc6da11b00dcc0da10213d064f42e016984049e5

    SHA512

    07bf8c836ce25656fc7eaf45c63b9be901589c30679cca9425c570528fda7028b107994521ca74d96db02320e28e5e5c6c38688d8bcd0087b42630378a08f345

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    e6d3a5e97ec9d304ed6e789c7f754bed

    SHA1

    1ab1b292b28fe5f6c5847dd6db04bf36bb2b5ba6

    SHA256

    aabdd670f30e939d07c84ea6a5c5a82666e0d3dceabfe0e18b0a60d3bc2ebb2a

    SHA512

    a67ccdbfec4d36dae4b01ab6f10be69730683bbe22fb8ccf917ba5fcd1825d9c4d40aa35291d90ec23f6ffdcb931d3ae6e9d10ebee27bcda47aaf1854d8d9e2a

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    034d05ee785409c420ff73ba625e38e0

    SHA1

    26305c2ff06aa7e25fe0397ea98140cdb8eddca5

    SHA256

    9b0545d0e132c3dcbb2990d5155fcf61e356cefdbd484fe0d2488cda720bd804

    SHA512

    a671287528a0c2fb0994ba676fdd3546d57a0f0a5f22c2d115c39228a02808a96884e943db8d8c2e5927a48fe9d20f707ff05f4c66571987d028192c1eca6db0

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    5ccc3a89cd874da2da3816b1b779222d

    SHA1

    e0ff9e38c9f9ae0859ab360de3c02e2fe9ab11f7

    SHA256

    fe7b12f548e1b4963b4fe9b6f90d2f5cc7a186749228f882121b8eef5af630cd

    SHA512

    3cd30c18baa6ac318eb00b2ecb718e084e51927aab74056b19766d8f77ab196b70962c6e2f1b36f91e4d661df9e1d0f90eff32f265560c39bf8588d660001a05

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    5d95d0683fd99d1ad612007629d2f501

    SHA1

    ac7b9c6fe2d67d686ef34d5998a3cb72e3c7dd38

    SHA256

    534a6eeb5bc3fbe4751676d5d0ea77ae767bdcdf22c3432b94eec7570b91071b

    SHA512

    d5189dffef4d94476819b1ed3ace9fc122ddb05cc10d9132a833930b0cc5113d81cdea36392d77bbe437b9dfd594e71d92f9994003f876d8fb2c0b0b73cff17c

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    2c678e7ea65fa1631ea65d96a2cea11f

    SHA1

    923d029976ee29be82360a550e202f56a9f46ad8

    SHA256

    5f6ab499d44bbe929aac09be8894a01901e06395026861162e90343f011d890e

    SHA512

    83155ff3d98ef26aeb2130e376301f2e8e3cea94c04703d49a6afe4fe22e53e22af2952e6dcfc740047eb50c99592bc25888c68cdb4ce4f5679a3deacfb489f7

  • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

    Filesize

    344B

    MD5

    11d12b2accad60d1d253ef076c381448

    SHA1

    abd2372b383ea5d2e2fada3792a87e8c338c33d4

    SHA256

    a52a5224da9d174a13875196d3b52112852562169f736c365b3d5c931184473f

    SHA512

    41e759ca4aaae06f57b98e4ff75fa40f93a406875cd8533c7d2f8f320e3bcabadbf7bb009fb392f3424a661f7e695ba43659df0bf8bd1574ca0ec0137fc7bd03

  • C:\Users\Admin\AppData\Local\Temp\Cab712D.tmp

    Filesize

    65KB

    MD5

    ac05d27423a85adc1622c714f2cb6184

    SHA1

    b0fe2b1abddb97837ea0195be70ab2ff14d43198

    SHA256

    c6456e12e5e53287a547af4103e0397cb9697e466cf75844312dc296d43d144d

    SHA512

    6d0ef9050e41fbae680e0e59dd0f90b6ac7fea5579ef5708b69d5da33a0ece7e8b16574b58b17b64a34cc34a4ffc22b4a62c1ece61f36c4a11a0665e0536b90d

  • C:\Users\Admin\AppData\Local\Temp\Tar71FB.tmp

    Filesize

    171KB

    MD5

    9c0c641c06238516f27941aa1166d427

    SHA1

    64cd549fb8cf014fcd9312aa7a5b023847b6c977

    SHA256

    4276af3669a141a59388bc56a87f6614d9a9bdddf560636c264219a7eb11256f

    SHA512

    936ed0c0b0a7ff8e606b1cc4175a1f9b3699748ccbba1c3aff96203033d2e9edabf090e5148370df42fbfc4e31d7229493706ff24f19ff42ff7bef74a6baad06

  • C:\Users\Default\NTUSER.DAT.LOG2

    Filesize

    536B

    MD5

    b9ec90e9a4be2310ea1b65d428b4a93a

    SHA1

    a5a856a14f193e28b834d139c19dfbb145e87f9b

    SHA256

    cbb79eea2196ecdab882045363e8358eaa0177fe459d7118849863055abe44d3

    SHA512

    66cc3ac608d5d209a390d6e32b8db37820776436a48731b24533746e9e5aec533de71d7bbcbe689dd1de9eb722d111ff19dd37d5e465ba54349ff1b40b896ee3

  • \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE

    Filesize

    252KB

    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

  • \Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE

    Filesize

    1.4MB

    MD5

    5ae9c0c497949584ffa06f028a6605ab

    SHA1

    eb24dbd3c8952ee20411691326d650f98d24e992

    SHA256

    07dd9364be7babc5f9a08f0ccd828a9a55137845df1782b147f12943f234ea4e

    SHA512

    2e99bb500c281c367cc54fa283905b2537905ea4fe8986f676adbb1aaf58460dd2db082bb46a3dbe9dc836fbae3ee8832990839432dd99c74de58cc9b9295788

  • \Users\Admin\AppData\Local\Temp\3582-490\Neshta.exe

    Filesize

    678KB

    MD5

    5aa0a571567f8437556e9b00ae5a3532

    SHA1

    45377cb152832c9112db7909219fa87a6e760aae

    SHA256

    73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

    SHA512

    d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

  • memory/1732-722-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1732-720-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1732-719-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

  • memory/1732-547-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB