Overview

overview

10

Static

static

10

2024-08-21...er.exe

windows7-x64

10

2024-08-21...er.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    143s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/08/2024, 01:06

Sharing

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General

  • Target
    2024-08-21_3fafe32b4f9f954a7268e55a0047c4be_medusalocker.exe
  • Size 1.2MB
  • Sample240821-bf7cmswekq
  • SHA256 8623772a34de4f27a2757197807de36600e759f745f52b93e8c165f9963cbacf
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
credential_accessdefense_evasiondiscoveryevasionexecutionimpactpersistenceransomwarespywarestealer

Malware Config

Extracted

Path

  • C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\!!!HOW_TO_DECRYPT!!!.mht

Ransom Note
  • From: =?utf-8?B?0RFQctTF0YDQcNC60IXQvdC+IEludGVybmV0IED4cGxvseVyIDEz?= Subject: Date: San, 00 Jan 2000 00:00:00 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-MimeOLE: Produced By Microsoft MimeOLE =EF=BB=BF<!DOCTYPE HTML> <!DOCTYPE html PUBLIC "" "">=20 <HTML lang=3D"ru">=20 <HEAD>=20 <META = content=3D"IE = 3D11.0000" http-equiv=3D"X - UA - Compatible">=20 <META charset=3D"utf-8">=20 <TITLE>!!!HOW_TO_DECRYPT!!!</TITLE>=20 <LINK href=3D"style.css" rel=3D"stylesheet">=20 <META name=3D"GENERATOR" content=3D"MSHTML 11.00.10570.1001">=20 </HEAD>=20 <BODY>=20 <p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span class=3DSpellE><b>=20 <span lang=3DEN-US style=3D'font-size:20.0pt;font-family:"Times New Roman","serif";mso-bidi-font-family:Arial;color:#C9211E'>=20 All your valiable data has been encrypted!</span></b></span></p><BR><BR>=20 <p class=3DMsoNormal style=3D'text-align:justify;text-justify:inter-ideograph'>=20 <span class=3DSpellE><span lang=3DEN-US style=3D'font-size:13.0pt;font-family:"Times New Roman","serif";mso-bidi-font-family:Arial'>=20 Hello!<BR>Sorry, but we have inform you that your order has been blocked due to the issue of securities. Make sure your data is not blocked.=20 All your valuable files were encrypted with strong encryption algorithms AES-256 + RSA-2048 + CHACHA and renamed. You can read about these algorithms in Google.=20 Your unique encryption key is stored securely on our server and your data can be decrypted quickly and securely.<BR><BR>=20 We can prove that we can decrypt all of your data. Please just send us 3 small encrypted files which are randomly stored on your server.=20 We will decrypt these files and send them to you as a proof. Please note that files for free test decryption should not contain valuable information.<BR><BR>=20 As you know information is the most valuable resource in the world. That's why all of your confidential data was uploaded to our servers.=20 If you need proof, just write us and we will show you that we have your files. If you will not start a dialogue with us in 72 hours=20 we will be forced to publish your files in the Darknet. Your customers and partners will be informed about the data leak by email or phone.<BR><BR>=20 This way, your reputation will be ruined. If you will not react, we will be forced to sell the most important information such as databases=20 to interested parties to generate some profit.<BR><BR>Please understand that we are just doing our job. We don't want to harm your company.=20 Think of this incident as an opportunity to improve your security. We are opened for dialogue and ready to help you. We are professionals,=20 please don't try to fool us.<BR></span></span></p><BR><BR><p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><b>=20 <span lang=3DEN-US style=3D'font-size:14.0pt;font-family:"Times New Roman","serif";mso-bidi-font-family:Arial'>=20 If you want to resolve this situation,<BR>please write to ALL of these 2 email addresses:<BR>=20 [email protected]<BR>[email protected]<BR>In subject line please write your ID: 15741359033988283749</span></b></p><BR><BR>=20 <p class=3DMsoNormal style=3D'text-align:justify;text-justify:inter-ideograph'><b>=20 <span lang=3DEN-US style=3D'font-family:"Times New Roman","serif";mso-bidi-font-family: Arial;color:#C9211E'>=20 Important!<BR>=20 * We asking to send your message to ALL of our 2 email adresses because for various reasons, your email may not be delivered.<BR>=20 * Our message may be recognized as spam, so be sure to check the spam folder.<BR>=20 * If we do not respond to you within 24 hours, write to us from another email address. Use Gmail, Yahoo, Hotmail, or any other well-known email service.<BR>=20 Important<BR>=20 * Please don't waste the time, it will result only additinal damage to your company!<BR>=20 * Please do not try to decrypt the files yourself. We will not be able to help you if files will be modified.<BR>=20 </span></b></p>=20 <BR>=20 </BODY><BR>=20 </HTML>
URLs

  • http-equiv=3D"X

Signatures

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

    credential_accessstealer
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
    ransomwareevasion
  • Renames multiple (632) files with added filename extension

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

    ransomware
  • Deletes System State backups 3 TTPs 2 IoCs

    Uses wbadmin.exe to inhibit system recovery.

    ransomware
  • Drops file in Drivers directory 13 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Credentials from Password Stores: Windows Credential Manager 1 TTPs

    Suspicious access to Credentials History.

    credential_accessstealer
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 39 IoCs

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

  • Indicator Removal: File Deletion 1 TTPs

    Adversaries may delete files left behind by the actions of their intrusion activity.

    defense_evasion
  • Drops file in System32 directory 64 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 64 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

    discovery
  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 3 TTPs 13 IoCs

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

    ransomware
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of WriteProcessMemory 38 IoCs
  • System policy modification 1 TTPs 1 IoCs
    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\2024-08-21_3fafe32b4f9f954a7268e55a0047c4be_medusalocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-08-21_3fafe32b4f9f954a7268e55a0047c4be_medusalocker.exe"
    1⤵
    • Drops file in Drivers directory
    • Checks computer location settings
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    • System policy modification
    PID:1648
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=c: /on=c: /maxsize=401MB
      2⤵
      • Interacts with shadow copies
      PID:4228
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=c: /on=c: /maxsize=unbounded
      2⤵
      • Interacts with shadow copies
      PID:4560
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=d: /on=d: /maxsize=401MB
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:2860
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=d: /on=d: /maxsize=unbounded
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:4128
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=e: /on=e: /maxsize=401MB
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:1760
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=e: /on=e: /maxsize=unbounded
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:2200
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=f: /on=f: /maxsize=401MB
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:2936
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=f: /on=f: /maxsize=unbounded
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:2516
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=g: /on=g: /maxsize=401MB
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:908
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=g: /on=g: /maxsize=unbounded
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:4684
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=h: /on=h: /maxsize=401MB
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:2280
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Resize ShadowStorage /for=h: /on=h: /maxsize=unbounded
      2⤵
      • Enumerates connected drives
      • Interacts with shadow copies
      PID:3212
    • C:\Windows\SYSTEM32\vssadmin.exe
      vssadmin.exe Delete Shadows /All /Quiet
      2⤵
      • Interacts with shadow copies
      PID:4092
    • C:\Windows\SYSTEM32\bcdedit.exe
      bcdedit.exe /set {default} recoveryenabled No
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:2744
    • C:\Windows\SYSTEM32\bcdedit.exe
      bcdedit.exe /set {default} bootstatuspolicy ignoreallfailures
      2⤵
      • Modifies boot configuration data using bcdedit
      PID:4436
    • C:\Windows\SYSTEM32\wbadmin.exe
      wbadmin DELETE SYSTEMSTATEBACKUP
      2⤵
      • Deletes System State backups
      • Drops file in Windows directory
      PID:3232
    • C:\Windows\SYSTEM32\wbadmin.exe
      wbadmin DELETE SYSTEMSTATEBACKUP -deleteOldest
      2⤵
      • Deletes System State backups
      • Drops file in Windows directory
      PID:3592
    • C:\Windows\System32\Wbem\wmic.exe
      wmic.exe SHADOWCOPY /nointeractive
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:4296
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\2024-0~1.EXE >> NUL
      2⤵
        PID:4472
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:116
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k NetworkService -p -s CryptSvc
      1⤵
      • Drops file in System32 directory
      PID:4544

    Network

          MITRE ATT&CK Enterprise v15

          Reconnaissance

          Resource Development

          Initial Access

          Execution

          Command and Scripting Interpreter

          1
          T1059

          Windows Management Instrumentation

          1
          T1047

          Persistence

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Privilege Escalation

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Defense Evasion

          Direct Volume Access

          1
          T1006

          Indicator Removal

          4
          T1070

          File Deletion

          4
          T1070.004

          Modify Registry

          2
          T1112

          Credential Access

          Credentials from Password Stores

          2
          T1555

          Credentials from Web Browsers

          1
          T1555.003

          Windows Credential Manager

          1
          T1555.004

          Unsecured Credentials

          1
          T1552

          Credentials In Files

          1
          T1552.001

          Discovery

          Browser Information Discovery

          1
          T1217

          Peripheral Device Discovery

          1
          T1120

          Query Registry

          2
          T1012

          System Information Discovery

          3
          T1082

          Lateral Movement

          Collection

          Data from Local System

          1
          T1005

          Command and Control

          Exfiltration

          Impact

          Inhibit System Recovery

          4
          T1490

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          !!!HOW_TO_DECRYPT!!!.mht
          • Path C:\ProgramData\Mozilla-1de4eec8-1241-4177-a864-e594e8d1fb38\!!!HOW_TO_DECRYPT!!!.mht
          • Size 4KB
          • SHA256 da25f7dc79519fd53d471f0321a609bb605710e2013868ffaee66736f62b3ad6
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          2367C848C1C8A11F6F3502EDA2855348.1btc
          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\2367C848C1C8A11F6F3502EDA2855348.1btc
          • Size 824B
          • SHA256 438fe0bc0ff2d4b875f17e36fad7e98f8ea2f47afb2349fbdbb23c8790dce5cb
          • MD5 SHA1 SHA512
          Submit Download

          57C8EDB95DF3F0AD4EE2DC2B8CFD4157.1btc
          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157.1btc
          • Size 814B
          • SHA256 1625996fb63065052d1b097034c49859d8aed154f57515ab8f655453d0c4aafd
          • MD5 SHA1 SHA512
          Submit Download

          77EC63BDA74BD0D0E0426DC8F8008506.1btc
          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506.1btc
          • Size 840B
          • SHA256 d47d196ca7c10b05e01acf4a80dfb6b1210f2063bbb55765414ede758eee6de4
          • MD5 SHA1 SHA512
          Submit Download

          8DFDF057024880D7A081AFBF6D26B92F.1btc
          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\8DFDF057024880D7A081AFBF6D26B92F.1btc
          • Size 700B
          • SHA256 7f0528cce8c12ce85df33cf0e62c4f13a84da02ffe0dd95c51efe35b77a0b24e
          • MD5 SHA1 SHA512
          Submit Download

          C86BD7751D53F10F65AAAD66BBDF33C7.1btc
          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\C86BD7751D53F10F65AAAD66BBDF33C7.1btc
          • Size 770B
          • SHA256 63a9829a7c4389c45b79a0a5d5923a85ca528e6f228becc50170b8b20abea16d
          • MD5 SHA1 SHA512
          Submit Download

          FB0D848F74F70BB2EAA93746D24D9749
          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\FB0D848F74F70BB2EAA93746D24D9749
          • Size 290B
          • SHA256 a9f3bc8f842df2726f73d1a9608c5dd2fc9026e90876d34f0f0d58b34840cbed
          • MD5 SHA1 SHA512
          Submit Download

          FB0D848F74F70BB2EAA93746D24D9749.1btc
          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\FB0D848F74F70BB2EAA93746D24D9749.1btc
          • Size 842B
          • SHA256 2a7288a94169ac89b3a1cd214194e597a442cbf9c20e201eeaaa786e93e6ad78
          • MD5 SHA1 SHA512
          Submit Download

          FB5E2F83CE9B8330B0590B7CD2E5FF2E.1btc
          • Path C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\FB5E2F83CE9B8330B0590B7CD2E5FF2E.1btc
          • Size 782B
          • SHA256 2c6ee88b5e2afe4c3cb7b9fc6ed11ebfd9b31fdd1080a74261dbf8c685f45557
          • MD5 SHA1 SHA512
          Submit Download

          dberr.txt
          • Path C:\Windows\System32\catroot2\dberr.txt
          • Size 19KB
          • SHA256 a40d4411da7579ec682ff171b46a45e9e25107fa1109c83e39e78319d4b34820
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          edb.log
          • Path C:\Windows\System32\catroot2\edb.log
          • Size 2.0MB
          • SHA256 3ff4148a0b9f3ada70cc113c7e00ce42f5f1a27dfc1b113fd6f03424039dde82
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          57C8EDB95DF3F0AD4EE2DC2B8CFD4157.1btc
          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\57C8EDB95DF3F0AD4EE2DC2B8CFD4157.1btc
          • Size 850B
          • SHA256 27a60162ad92b5ca193e3cdb0b021bbb749bba3f689b2d886934c0139c068531
          • MD5 SHA1 SHA512
          Submit Download

          77EC63BDA74BD0D0E0426DC8F8008506.1btc
          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\77EC63BDA74BD0D0E0426DC8F8008506.1btc
          • Size 802B
          • SHA256 af96c899a7fe5a0616ea4839a8937616101aeb89142b301483038597e80af68f
          • MD5 SHA1 SHA512
          Submit Download

          FB0D848F74F70BB2EAA93746D24D9749.1btc
          • Path C:\Windows\system32\config\systemprofile\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\FB0D848F74F70BB2EAA93746D24D9749.1btc
          • Size 842B
          • SHA256 5ee0866e4e05649e49c4a8913a13a21f2608fe302fb703d2a94fe9f73315fe45
          • MD5 SHA1 SHA512
          Submit Download

          memory/4544-859-0x000002C315FB0000-0x000002C315FB1000-memory.dmp
          Download

          memory/4544-886-0x000002C318290000-0x000002C318291000-memory.dmp
          Download

          memory/4544-812-0x000002C3110E0000-0x000002C3110E1000-memory.dmp
          Download

          memory/4544-813-0x000002C3102E0000-0x000002C3102E1000-memory.dmp
          Download

          memory/4544-814-0x000002C3102E0000-0x000002C3102E1000-memory.dmp
          Download

          memory/4544-816-0x000002C311F90000-0x000002C311F91000-memory.dmp
          Download

          memory/4544-828-0x000002C30FF20000-0x000002C30FF21000-memory.dmp
          Download

          memory/4544-827-0x000002C3101D0000-0x000002C3101D1000-memory.dmp
          Download

          memory/4544-830-0x000002C3102C0000-0x000002C3102C1000-memory.dmp
          Download

          memory/4544-836-0x000002C313F50000-0x000002C313F51000-memory.dmp
          Download

          memory/4544-837-0x000002C314F20000-0x000002C314F21000-memory.dmp
          Download

          memory/4544-839-0x000002C315030000-0x000002C315031000-memory.dmp
          Download

          memory/4544-799-0x000002C3102A0000-0x000002C3102A1000-memory.dmp
          Download

          memory/4544-848-0x000002C315560000-0x000002C315561000-memory.dmp
          Download

          memory/4544-847-0x000002C315560000-0x000002C315561000-memory.dmp
          Download

          memory/4544-838-0x000002C315030000-0x000002C315031000-memory.dmp
          Download

          memory/4544-879-0x000002C316B20000-0x000002C316B21000-memory.dmp
          Download

          memory/4544-878-0x000002C316B20000-0x000002C316B21000-memory.dmp
          Download

          memory/4544-882-0x000002C317030000-0x000002C317031000-memory.dmp
          Download

          memory/4544-802-0x000002C3103D0000-0x000002C3103D1000-memory.dmp
          Download

          memory/4544-904-0x000002C311230000-0x000002C311231000-memory.dmp
          Download

          memory/4544-903-0x000002C311230000-0x000002C311231000-memory.dmp
          Download

          memory/4544-957-0x000002C31A150000-0x000002C31A151000-memory.dmp
          Download

          memory/4544-926-0x000002C311510000-0x000002C311511000-memory.dmp
          Download

          memory/4544-924-0x000002C3112D0000-0x000002C3112D1000-memory.dmp
          Download

          memory/4544-923-0x000002C3112D0000-0x000002C3112D1000-memory.dmp
          Download

          memory/4544-996-0x000002C311C20000-0x000002C311C21000-memory.dmp
          Download

          memory/4544-995-0x000002C311C20000-0x000002C311C21000-memory.dmp
          Download

          memory/4544-1031-0x000002C31B0E0000-0x000002C31B0E1000-memory.dmp
          Download

          memory/4544-798-0x000002C310280000-0x000002C310281000-memory.dmp
          Download

          memory/4544-797-0x000002C310150000-0x000002C310151000-memory.dmp
          Download

          memory/4544-795-0x000002C310150000-0x000002C310151000-memory.dmp
          Download

          memory/4544-792-0x000002C310070000-0x000002C310071000-memory.dmp
          Download

          memory/4544-791-0x000002C310050000-0x000002C310051000-memory.dmp
          Download

          memory/4544-790-0x000002C30FF10000-0x000002C30FF11000-memory.dmp
          Download

          memory/4544-788-0x000002C30FF10000-0x000002C30FF11000-memory.dmp
          Download

          memory/4544-766-0x000002C30FC50000-0x000002C30FC51000-memory.dmp
          Download

          memory/4544-758-0x000002C30FE70000-0x000002C30FE71000-memory.dmp
          Download

          memory/4544-749-0x000002C30BBA0000-0x000002C30BBB0000-memory.dmp
          Download

          memory/4544-743-0x000002C30BB40000-0x000002C30BB50000-memory.dmp
          Download