Analysis

  • max time kernel
    160s
  • max time network
    130s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    28-09-2021 08:15

General

  • Target

    be277aea966fd23c28bf2fcbe04959f19fd008dfac3dd0508f747f177f6bed70.bin.sample.exe

  • Size

    191KB

  • MD5

    435b7f9a16f6846fd263e6641df6f496

  • SHA1

    fc45d2718f67ea9b59c7fc30c3d585049f884c12

  • SHA256

    be277aea966fd23c28bf2fcbe04959f19fd008dfac3dd0508f747f177f6bed70

  • SHA512

    5fa0c155a512ace1f78db1c0af612f06781b4e7e42e6ebb24d074ad1de9d73dbe2b2d4cf4665740241e41fecb22f2f8eeeb74d027a05a60f474f4807fe2160c7

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.best 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--- WIzXR2lGvuQk29m1PY7u4rlctcqqD9r7P8cxcChaQuFbVn9c3SEhznrejtQj3jBf ---END ID---
URLs

http://contirecj4hbzmyzuydyzrvm2c65blmvhoj2cvf25zqj2dwrrqcq5oad.onion/

https://contirecovery.best

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 1 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\be277aea966fd23c28bf2fcbe04959f19fd008dfac3dd0508f747f177f6bed70.bin.sample.exe
    "C:\Users\Admin\AppData\Local\Temp\be277aea966fd23c28bf2fcbe04959f19fd008dfac3dd0508f747f177f6bed70.bin.sample.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:908
    • C:\Windows\SYSTEM32\cmd.exe
      cmd.exe /c C:\Windows\System32\wbem\WMIC.exe shadowcopy where "ID='{493E2A7D-D35C-4823-8312-DB6A87B45E66}'" delete
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3916
      • C:\Windows\System32\wbem\WMIC.exe
        C:\Windows\System32\wbem\WMIC.exe shadowcopy where "ID='{493E2A7D-D35C-4823-8312-DB6A87B45E66}'" delete
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:3960
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2460
  • C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe
    "C:\Windows\SystemApps\ShellExperienceHost_cw5n1h2txyewy\ShellExperienceHost.exe" -ServerName:App.AppXtk181tbxbce2qsex02s8tw7hfxa9xb3t.mca
    1⤵
    • Suspicious use of SetWindowsHookEx
    PID:2940
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k appmodel -s tiledatamodelsvc
    1⤵
    • Drops file in Windows directory
    PID:272

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/272-116-0x00000240DC2A0000-0x00000240DC2B0000-memory.dmp

    Filesize

    64KB

  • memory/272-117-0x00000240DC4C0000-0x00000240DC4D0000-memory.dmp

    Filesize

    64KB

  • memory/272-118-0x00000240DCBE0000-0x00000240DCBE1000-memory.dmp

    Filesize

    4KB

  • memory/3916-114-0x0000000000000000-mapping.dmp

  • memory/3960-115-0x0000000000000000-mapping.dmp