Overview

overview

10

Static

static

10

b2493a5801...49.exe

windows7-x64

10

b2493a5801...49.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    127s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    23/02/2025, 12:42

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General

  • Target

    b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe

  • Size

    719KB

  • MD5

    8474039d83805eb7b447325c3a8d1ebb

  • SHA1

    a07d537f4253745a087709a9a07c449f84deed8d

  • SHA256

    b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649

  • SHA512

    3272091bbf123ba5e1592e8b2bd7740cddcb174fa158bc6980b25ee61d92387e94a25284736253f83a6eea78b427f6717e888e843db9d7759cfe9a7676576438

  • SSDEEP

    12288:q4UOTYQivI2qZ7aSgLwkFVpzUvest4ZEbjJLuhJVoM7SPd:bRTYVQ2qZ7aSgLwuVfstRJL6YM6

Score
10/10
medusalockerneshtadefense_evasiondiscoveryexecutionimpactpersistenceransomwarespywarestealertrojan

Malware Config

Extracted

Path

\Device\HarddiskVolume1\Boot\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;">86F25BA7239C51A165342BB15A315329041A4D46DCD54ACD4742C3A0EBC71102625B065AE26B0336ABADE0123800A7E6A3A5D969CCB3C8249A4AD82AEE17FC8E<br>F945A07FC239E15DCEAF4F47A4101C676B0A794F675B4F16C18A61B9903882A05933720B7EE11B2FDBFBF0D77727F653FEA9D22E62375FF0CD19AC37802E<br>2FC384812C2CC0E485E9B1DB135B1C60A9A6E3B012C3141E5437A6E57A7808043A8B058E6808F5B44C7F0939CFB7F25806E0079CE4E0BD629D4454EB6115<br>7633F64205D16431153E53BED2A9F70D64C75C93BAD0A7A5C84B1E4DD0ADA3F8CC7512D40B0AC43330E0E9E66F7A0A4EF76D7B7EF7CD924822FCCD4F7701<br>9120FDA954BCA51859B996661715E1733278E4DCAE8C312F85AE3C328D046A50948E76DBB6E27650B84D9A0AEAC9F8140ACFA4B96F7E6747FFAE91786B14<br>C765B8D97B0C305E3C5E7A6FF21EE11406DCFCF764BF58A244611A01BA8BA15EF099533AFEDA62AE59591575B40E99330CE97E7B51C645885BA605937756<br>CCA3F4B1CD8E8E08524413F866CB48D3154A1667E1F3C6417EE15932D36BCFEEBDD9721E810DEA2BC993DE3DA748AA767BD35FC88B6E82248D348AF3D15B<br>15752CD082FC73F5A8694AEFDF14973EEC3BF82EB60A8C319F45A0A8F19ECF1C798404B530AB85F69D2F8E7946236578B4F076011C2F7458C3B317B8D007<br>40F9198F1D6F56D9777825894399</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-LVE0W9w9i5j3EjZEYVgfwPpu43Xe7oQu</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 4 IoCs
  • MedusaLocker

    Ransomware with several variants first seen in September 2019.

    ransomwaremedusalocker
  • MedusaLocker payload 1 IoCs
  • Medusalocker family
    medusalocker
  • Neshta

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

    persistencespywareneshta
  • Neshta family
    neshta
  • UAC bypass 3 TTPs 2 IoCs
    defense_evasiontrojan
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Renames multiple (223) files with added filename extension

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

    ransomware
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 3 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
    persistence
  • Reads user/profile data of web browsers 3 TTPs

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

    spywarestealer
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    defense_evasiontrojan
  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

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

    discovery
  • Interacts with shadow copies 3 TTPs 3 IoCs

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

    ransomware
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 63 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs
  • System policy modification 1 TTPs 3 IoCs
    defense_evasion
  • Uses Volume Shadow Copy service COM API

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

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe
    "C:\Users\Admin\AppData\Local\Temp\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe"
    1⤵
    • Loads dropped DLL
    • Modifies system executable filetype association
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Modifies registry class
    • Suspicious use of WriteProcessMemory
    PID:2244
    • C:\Users\Admin\AppData\Local\Temp\3582-490\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe
      "C:\Users\Admin\AppData\Local\Temp\3582-490\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe"
      2⤵
      • UAC bypass
      • Executes dropped EXE
      • Checks whether UAC is enabled
      • Drops desktop.ini file(s)
      • Enumerates connected drives
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      • System policy modification
      PID:1500
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • System Location Discovery: System Language Discovery
        • Interacts with shadow copies
        PID:2780
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2888
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • System Location Discovery: System Language Discovery
        • Interacts with shadow copies
        PID:296
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2064
      • C:\Windows\SysWOW64\vssadmin.exe
        vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • System Location Discovery: System Language Discovery
        • Interacts with shadow copies
        PID:2756
      • C:\Windows\SysWOW64\Wbem\wmic.exe
        wmic.exe SHADOWCOPY /nointeractive
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:3044
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2960
  • C:\Windows\system32\taskeng.exe
    taskeng.exe {AE7B628B-3296-4A92-8B02-F183B9D4029E} S-1-5-21-1488793075-819845221-1497111674-1000:UPNECVIU\Admin:Interactive:[1]
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2196
    • C:\Users\Admin\AppData\Roaming\svhost.exe
      C:\Users\Admin\AppData\Roaming\svhost.exe
      2⤵
      • Executes dropped EXE
      PID:2844

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Windows Management Instrumentation

1
T1047

Persistence

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Event Triggered Execution

1
T1546

Change Default File Association

1
T1546.001

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Direct Volume Access

1
T1006

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Indicator Removal

2
T1070

File Deletion

2
T1070.004

Modify Registry

3
T1112

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

1
T1012

System Information Discovery

3
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Inhibit System Recovery

2
T1490

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

    Download Submit

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

    859KB

    MD5

    02ee6a3424782531461fb2f10713d3c1

    SHA1

    b581a2c365d93ebb629e8363fd9f69afc673123f

    SHA256

    ead58c483cb20bcd57464f8a4929079539d634f469b213054bf737d227c026dc

    SHA512

    6c9272cb1b6bde3ee887e1463ab30ea76568cb1a285d11393337b78c4ad1c3b7e6ce47646a92ab6d70bff4b02ab9d699b84af9437b720e52dcd35579fe2693ec

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\3582-490\b2493a580153291b69ca23190d00a00b1220cd0aadf469b3974fdaa726516649.exe
    Filesize

    678KB

    MD5

    5aa0a571567f8437556e9b00ae5a3532

    SHA1

    45377cb152832c9112db7909219fa87a6e760aae

    SHA256

    73549f6017ad04e475e40e9d306b3e042d080843d8e7c029a5bb6b8ab7e34432

    SHA512

    d320fecef75b4514b9cf154d41c3cc03e2cd8f6bf15ff0d7c97398127c0728cf0b24e5a46435573d38b384b1515876070f28daa7d37e81de10d1db2b27ae51ec

    Download Submit

  • C:\Users\Admin\Documents\BlockJoin.xlsx
    Filesize

    16KB

    MD5

    43564f0188c7efcb2c764e79496f637f

    SHA1

    a840077ca766b3bf199e76f6c06190c8a185df53

    SHA256

    470060403d7f006a96471974a1e733e3f7c8335d31dcab51270e85dd87a3217d

    SHA512

    ea170b18cba60b0e2c91d5c38fc8d4e91d647d76cb411e6e1698e348e80b848e5647f05ec9cdc03f4bd315c6c6845fa628b845340000a2ca82d3401438f19d88

    Download Submit

  • C:\Users\Default\NTUSER.DAT.LOG2
    Filesize

    536B

    MD5

    894fcb2a75351096acd6e2692933a523

    SHA1

    22329f70f5af235309dba646cb28f83e93b4bdc8

    SHA256

    8407669bbeb54abe8c883fbac15b7fcae487696ae9a51d1328e195857adfb721

    SHA512

    1d1d992c7f66a6651233e789bc1a5e5ee5924248d90c9f28cd9ceaabf8ffbba1d2aa72623eec16cdbcb95b44f953afa48fc1419dabe8d43c4fdec4afe55ae9a2

    Download Submit

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

    4KB

    MD5

    07aedc432fa99393187775b0c342b8a7

    SHA1

    ebd50e01419fb7581b867948e61c08a364f46ee1

    SHA256

    bb86d58a2f5eea12cd863e991d2323439fb0055fec072f3c31086b4d37607afb

    SHA512

    13582f986d3cc84d556d889e2e6ccca12c2bde1b3198497c7c6ad911d8d54158dc238adacfc373c93af1e1d984f1ef0db5a5b60fbed4a6e0350ebd90eb64cb96

    Download Submit

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

    252KB

    MD5

    9e2b9928c89a9d0da1d3e8f4bd96afa7

    SHA1

    ec66cda99f44b62470c6930e5afda061579cde35

    SHA256

    8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043

    SHA512

    2ca5ad1d0e12a8049de885b90b7f56fe77c868e0d6dae4ec4b6f3bc0bf7b2e73295cc9b1328c2b45357ffb0d7804622ab3f91a56140b098e93b691032d508156

    Download Submit

  • memory/2244-778-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

    Download

  • memory/2244-780-0x0000000000400000-0x000000000041B000-memory.dmp

    Filesize

    108KB

    Download