Analysis

  • max time kernel
    145s
  • max time network
    153s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    24-09-2021 10:27

General

  • Target

    7236c8098c55ea1d144f4d6646e8cab8c7fdbde1d127d409b0d6a4ff1029628e.exe

  • Size

    196KB

  • MD5

    4bb476c98b3bf1e4fa6212728b354160

  • SHA1

    0c7ce8f80ac786cbd1c1c4054d605d366896d36b

  • SHA256

    7236c8098c55ea1d144f4d6646e8cab8c7fdbde1d127d409b0d6a4ff1029628e

  • SHA512

    26df60690db131ae396c91fde7d5d95ebb67975cd2adf0189c2b136cef43314c32fd133dcafee9c353e9a54c609751b27e179f3e7536bddfa2aa6be0d78d59e7

Malware Config

Extracted

Path

C:\readme.txt

Family

conti

Ransom Note
All of your files are currently encrypted by CONTI strain. As you know (if you don't - just "google it"), all of the data that has been encrypted by our software cannot be recovered by any means without contacting our team directly. If you try to use any additional recovery software - the files might be damaged, so if you are willing to try - try it on the data of the lowest value. To make sure that we REALLY CAN get your data back - we offer you to decrypt 2 random files completely free of charge. You can contact our team directly for further instructions through our website : TOR VERSION : (you should download and install TOR browser first https://torproject.org) http://contirecj4hbzmyzuydyzrvm2c65blmvhoj2cvf25zqj2dwrrqcq5oad.onion/ HTTPS VERSION : https://contirecovery.xyz/ YOU SHOULD BE AWARE! Just in case, if you try to ignore us. We've downloaded a pack of your internal data and are ready to publish it on out news website if you do not respond. So it will be better for both sides if you contact us as soon as possible. ---BEGIN ID--- GmGukC9E0yRlTdXQzcJEdPGtF62io3YPEUGd4wbj0OkVD51KrnXsWYnZlEN8oux1 ---END ID---
URLs

http://contirecj4hbzmyzuydyzrvm2c65blmvhoj2cvf25zqj2dwrrqcq5oad.onion/

https://contirecovery.xyz/

Signatures

  • Conti Ransomware

    Ransomware generally thought to be a successor to Ryuk.

  • Modifies extensions of user files 6 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 32 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 45 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7236c8098c55ea1d144f4d6646e8cab8c7fdbde1d127d409b0d6a4ff1029628e.exe
    "C:\Users\Admin\AppData\Local\Temp\7236c8098c55ea1d144f4d6646e8cab8c7fdbde1d127d409b0d6a4ff1029628e.exe"
    1⤵
    • Modifies extensions of user files
    • Drops startup file
    • Drops desktop.ini file(s)
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:2504
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c C:\Windows\System32\wbem\WMIC.exe shadowcopy where "ID='{2D3E78C1-16F5-45C2-8C51-8B602BF398FB}'" delete
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2924
      • C:\Windows\System32\wbem\WMIC.exe
        C:\Windows\System32\wbem\WMIC.exe shadowcopy where "ID='{2D3E78C1-16F5-45C2-8C51-8B602BF398FB}'" delete
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:1288
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3716
  • C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
    "C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
    1⤵
    • Drops file in Windows directory
    • Suspicious use of SetWindowsHookEx
    PID:3376
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k appmodel -s tiledatamodelsvc
    1⤵
    • Drops file in Windows directory
    PID:2180

Network

MITRE ATT&CK Matrix ATT&CK v6

Credential Access

Credentials in Files

1
T1081

Collection

Data from Local System

1
T1005

Replay Monitor

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Downloads

  • memory/1288-116-0x0000000000000000-mapping.dmp
  • memory/2180-117-0x000001D0A25E0000-0x000001D0A25F0000-memory.dmp
    Filesize

    64KB

  • memory/2180-118-0x000001D0A29C0000-0x000001D0A29D0000-memory.dmp
    Filesize

    64KB

  • memory/2924-115-0x0000000000000000-mapping.dmp