Overview

overview

10

Static

static

10

ac81418b0b...ea.exe

windows7-x64

10

ac81418b0b...ea.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    142s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-08-2023 08:59

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General

  • Target

    ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea.exe

  • Size

    666KB

  • MD5

    8645a413332f840e925bac3cf19ceb57

  • SHA1

    87ca0cd2e1c04c2437d302f2864d1e68ea991677

  • SHA256

    ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea

  • SHA512

    ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e

  • SSDEEP

    12288:ZYW1LNT35lDbK/LIVaN8+T7vwqyqhYMhWt918vulAFC9+m:dd35lDbKDIwWUDyqS5omMC9+

Score
10/10
medusalockerevasionransomwarespywarestealertrojan

Malware Config

Extracted

Path

\Device\HarddiskVolume1\Boot\!-Recovery_Instructions-!.html

Ransom Note
<!DOCTYPE html> <html lang="en"> <head> <meta charset='utf-8'> <meta name='viewport' content='width=device-width,initial-scale=1'> <title></title> <style> html, body { background-color: #1a1a1a; } body { padding-top: 1rem !important; font-size: 1.3rem; color: white; } #text h2 { font-size: 2rem; font-weight: 600; line-height: 1.125; } .container { max-width: 1152px; flex-grow: 1; margin: 0 auto; position: relative; width: auto; } .box { background-color: #242424; display: block; padding: 1.25rem; border: 1px solid #303030; } a { color: #00b4d8; text-decoration: none; } a:hover { text-decoration: underline; } li { margin-bottom: 10px; } </style> </head> <body> <div class='container'> <div class='box'> <div id='text'> <h2>If you get this message, your network was hacked!</h2> <p>After we gained full access to your servers, we first downloaded a large amount of sensitive data and then encrypted all the data stored on them.</p> <p>That includes personal information on your clients, partners, your personnel, accounting documents, and other crucial files that are necessary for your company to work normally.</p> <p>We used modern complicated algorithms, so you or any recovery service will not be able to decrypt files without our help, wasting time on these attempts instead of negotiations can be fatal for your company.</p> <p>Make sure to act within <span style='color:#f4a261;'>72</span> hours or the negotiations will be considered failed!</p> <p>Inform your superior management about what's going on.</p> <p> Contact us for pricing and decryption software.</p> <p> Contact us by email:<p> <h2>[email protected]</h2> </p>If you do not receive a response within 24 hours, please contact us at our additional contacts:</p> <p> 1) Download for TOX CHAT https://tox.chat/download.html</p> <p> 2) Open chat<p> <p>Add ID Chat: </p><h2>3C9D49B928FDC3C15F0314217623A71B865909B308576B4B0D10AEA62C98677B4A3F160D5C93</h2> <p>If we did not answer you, leave the chat enabled, the operator will contact you!<p> </p>To verify the possibility of the recovery of your files we can decrypted 1-3 file for free.</p> </p>Attach file to the letter (no more than 5Mb).</p> <h2>If you and us succeed the negotiations we will grant you:</h2> <ul> <li>complete confidentiality, we will keep in secret any information regarding to attack, your company will act as if nothing had happened.</li> <li>comprehensive information about vulnerabilities of your network and security report.</li> <li>software and instructions to decrypt all the data that was encrypted.</li> <li>all sensitive downloaded data will be permanently deleted from our cloud storage and we will provide an erasure log.</li> </ul> <h2>Our options if you act like nothing's happening, refuse to make a deal or fail the negotiations:</h2> <ul> <li>inform the media and independent journalists about what happened to your servers. To prove it we'll publish a chunk of private data that you should have ciphered if you care about potential breaches. Moreover, your company will inevitably take decent reputational loss which is hard to assess precisely.</li> <li>inform your clients, employees, partners by phone, e-mail, sms and social networks that you haven't prevent their data leakage. You will violate laws about private data protection.</li> <li>start DDOS attack on you website and infrastructures.</li> <li>personal data stored will be put on sale on the Darknet to find anyone interested to buy useful information regarding your company. It could be data mining agencies or your market competitors.</li> <li>publish all the discovered vulnerabilities found in your network, so anyone will do anything with it.</li> </ul> <h2>Why pay us?</h2> <p>We care about our reputation. You are welcome to google our cases up and be sure that we don't have a single case of failure to provide what we promissed.</p> <p>Turning this issue to a bug bounty will save your private information, reputation and will allow you to use the security report and avoid this kind of situations in future.</p> <h2>Your personal ID</p> Your ID: C3ED470F51081ECEF5A210C47AE08F6F3CD87E10D1B81E374DD1BB4ECA86AC37C17B685416A2E7DB8CEEE73C3B85417CC6520F38BE7A71D26C48CFB1FC94AB88<br>14C8E2A7ACAE548D8ED2474A793791F4F5D96BC2618881D75BC597E62B4080EA39305152E0D64961D7D9077C34D5F9E588FF3EE9A2325348198CF6298693<br>D217B36CD356405AB3FCFDCC61BFFDE2C5B5B0329ACCF46967E0BCE3C4288FABAE744BAF7BD04E4118FB5F664051B9760D8E21AFF6741B60C06572C8C186<br>96DDDA0A743764B56EB317B585645F3B93726019C5E5D71724BE117853598EE61856D8F2AB5E5EB6A7E38506D49CC430D4C8FEA9B640F734260641C1B34A<br>FCA156E79F572F15D520D76528208C251ADDBE43A38F48E151746BB35DD13530B4696E465C366177E8CFB73AEA06226A133E67BD51F2E1E596FEFCBB3331<br>9038C0D39E815AFC0C8BA2CDA002AAC3B115FBC2E9DEA0DD6AC8DBAEEA8A64E21DB8D96AACF727771F633AE132187633377DED15418F39B8764791E16CE4<br>0C362791EA8606F2741304892E6255BA146FDF5EE3353EC6995B031306F20805022FA8016271D0427217F9D7C57B11C315720AE1AD2FC7157FB89AF62032<br>018A2D591F0075C6FC6BAACB5D9E80803DFD8D13459D837FB0AD7FF465D73DF5EFA3B4AEF50847B21E34448557DD745C5BD4DE31E1083632A89DF5B46A8C<br>5889F4239F5513BE585C44DC2413
Emails
URLs

https://tox.chat/download.html</p>

Signatures

  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

    ransomwaremedusalocker
  • MedusaLocker payload 2 IoCs
  • UAC bypass 3 TTPs 2 IoCs
    evasiontrojan
  • Renames multiple (187) files with added filename extension

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

    ransomware
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • 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.

  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs
  • System policy modification 1 TTPs 3 IoCs
    evasion

Processes

  • C:\Users\Admin\AppData\Local\Temp\ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea.exe
    "C:\Users\Admin\AppData\Local\Temp\ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea.exe"
    1⤵
    • UAC bypass
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:4328
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:1520
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3640
    • C:\Windows\SysWOW64\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:668
  • C:\Users\Admin\AppData\Roaming\svhost.exe
    C:\Users\Admin\AppData\Roaming\svhost.exe
    1⤵
    • Executes dropped EXE
    PID:456

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\svhost.exe
    Filesize

    666KB

    MD5

    8645a413332f840e925bac3cf19ceb57

    SHA1

    87ca0cd2e1c04c2437d302f2864d1e68ea991677

    SHA256

    ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea

    SHA512

    ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e

    Download Submit

  • C:\Users\Admin\AppData\Roaming\svhost.exe
    Filesize

    666KB

    MD5

    8645a413332f840e925bac3cf19ceb57

    SHA1

    87ca0cd2e1c04c2437d302f2864d1e68ea991677

    SHA256

    ac81418b0b932a228d2312e0fb78c8e427e71560a413f702528127c7a59640ea

    SHA512

    ac23c7f28deb3700847bcbf3305e1d6ef133d8ecb45010092024d696ba3839ea53aeee87077f3efc88f9d933673a7147edb862c2ac5636f9f63c3809a557625e

    Download Submit

  • C:\Users\Default\ntuser.dat.LOG2
    Filesize

    536B

    MD5

    59785521d708abcaa1df5f25808c3707

    SHA1

    843e8fc3bb3eb097c9fef36a820f4b145164a707

    SHA256

    0bbb5d9b9fe4d38622734185adb9abd3621ad18541916bc33e5bfe3dcdf67f1f

    SHA512

    e5498ebd007a225d906ae0ff4fbaee4b4ebeadb17b3357fbe58194d587675fecb2015e35cc3750be8297a4b2cfcd584c371039b035e244a163bb0742bfbe69c2

    Download Submit

  • \Device\HarddiskVolume1\Boot\!-Recovery_Instructions-!.html
    Filesize

    5KB

    MD5

    1d6e882d1089cc732b90ce918f472d21

    SHA1

    d571160aa46f913e063c9c3675422ed23d21a800

    SHA256

    b621206d9f027a824860c9817da7c1b1260d8cf8e9a1fcc87532428ebd2e7758

    SHA512

    f73f4cfb177a00d72c0de1ac8c642028945072b7d5c43c4c52bda21d9294f376d7b3d7917703791b6f6781cb6272b23e865cec5e651706ba0d3c74172ccc19bc

    Download Submit