Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220112
  • submitted
    20-01-2022 11:33

General

  • Target

    904e0855772f56721cc157641a26bb7963651e5a45c3bb90764328b17081abd5.bin.sample.dll

  • Size

    190KB

  • MD5

    641d7e44b87e88608443d6423937d983

  • SHA1

    7e9f57de4eaf2fa3535c1b4f0c5fa1f33b3dd2ac

  • SHA256

    904e0855772f56721cc157641a26bb7963651e5a45c3bb90764328b17081abd5

  • SHA512

    f0c40529be05c7631bd91d94232dbc9036780565f05863c3253e273f1b84156c4cede68f594d645c52f2f8478b6c3b36e312a9bf4f78c4a94ed65fed0b2d372b

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/ 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--- ybDIfd1mzTBPYo5dyj6JZxMmDtmafJ1OF4NJyOpQSiAjMHstTJGMe570USnFTRSM ---END ID---
URLs

http://contirecj4hbzmyzuydyzrvm2c65blmvhoj2cvf25zqj2dwrrqcq5oad.onion/

Signatures

  • Conti Ransomware

    Ransomware generally thought to be a successor to Ryuk.

  • Modifies extensions of user files 7 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Sets service image path in registry 2 TTPs
  • Drops startup file 1 IoCs
  • Drops desktop.ini file(s) 31 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Modifies data under HKEY_USERS 41 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\regsvr32.exe
    regsvr32 /s C:\Users\Admin\AppData\Local\Temp\904e0855772f56721cc157641a26bb7963651e5a45c3bb90764328b17081abd5.bin.sample.dll
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:456
    • C:\Windows\SysWOW64\regsvr32.exe
      /s C:\Users\Admin\AppData\Local\Temp\904e0855772f56721cc157641a26bb7963651e5a45c3bb90764328b17081abd5.bin.sample.dll
      2⤵
      • Modifies extensions of user files
      • Drops startup file
      • Drops desktop.ini file(s)
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      PID:772
  • C:\Windows\System32\WaaSMedicAgent.exe
    C:\Windows\System32\WaaSMedicAgent.exe c8e1f8af4f80e9b7d483a13360d29b63 9BC1rJC06k+5TJbrMbgHig.0.1.0.0.0
    1⤵
    • Modifies data under HKEY_USERS
    PID:3676
  • C:\Windows\system32\NOTEPAD.EXE
    "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\readme.txt
    1⤵
    • Opens file in notepad (likely ransom note)
    PID:1676
  • C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost.exe
    "C:\Windows\SystemApps\MicrosoftWindows.Client.CBS_cw5n1h2txyewy\InputApp\TextInputHost.exe" -ServerName:InputApp.AppX9jnwykgrccxc8by3hsrsh07r423xzvav.mca
    1⤵
    • Suspicious use of SetWindowsHookEx
    PID:1172
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k wusvcs -p
    1⤵
      PID:3320

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

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    Downloads

    • C:\Users\Admin\Desktop\readme.txt

      MD5

      2da0328cc889bc5ba5e28cb4537f2bbc

      SHA1

      f7c12e8253b0ee4a8d22c563bf9eb85ac8d649ed

      SHA256

      51c19371ff5a46a1abc6ab22f04dc912dea030f513d06615fef0cadb74380760

      SHA512

      db64ba8b15a0b2d0af158c68ae1fcf66c4390a38e76318aa6e50aa73483fb91e91f131405128d567266abcd3f4f60c567003777e36d7393dfcbb446ae33ceb59