Analysis

  • max time kernel
    89s
  • max time network
    130s
  • platform
    windows10_x64
  • resource
    win10v200430
  • submitted
    01-07-2020 09:38

General

  • Target

    2F8D2E2177EE32CA380C4EDF4F7160D4.bin.exe

  • Size

    27KB

  • MD5

    2f8d2e2177ee32ca380c4edf4f7160d4

  • SHA1

    54682e6579620b6f8406b5122fcca2ff6c7cd80b

  • SHA256

    2cc7e6ee6c500f4968b6f989ac295d2de0b3974b5905ec1fc3ab9e8662788379

  • SHA512

    49dd1f1d1e862166f5ba142ea93f339a46684ff43c7890a24b2700bdde996750c0ee98030469091d78ec4b38552b7ca92e162088c32e912f96b4fac8ca22c139

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\README.txt

Family

darkcrypt

Ransom Note
[+] All Your Files Have Been Encrypted [+] [-] Do You Really Want To Restore Your Files? [+] Write Us To The E-Mail : Filemgr@tutanota.com [+] If you did not get any response until 24 hours later,Write to this E-Mail : Cryptor6@tutanota.com [-] Write Your Unique-ID In The Title Of Your Message. [+] Unique-ID : 949CEBC7 [-] You Have To Pay For Decryption In Bitcoins. [-] The Price Depends On How Fast You Write To Us. [-] After Payment We Will Send You The Decryption Tool That Will Decrypt All Your Files. _______________________________________________ [+] Free Decryption As Guarantee [+] [-] Before Paying You Can Send Us Up To 5 Files For Free Decryption, The Total Size Of Files Must Bee Less Than 10MB, (Non Archived) And Files Should Not Contain Valuable Information (Databases, Backups, Large Excel -Sheets, Etc). _______________________________________________ [+] How To Obtain Bitcoins [+] [-] The Easiest Way To Buy Bitcoins Is LocalBitcoins Site : https://localbitcoins.com/buy_bitcoins You Have To Register, Click 'Buy Bitcoins', And Select The Seller By Payment Method And Price. [-] Also You Can Find Other Places To Buy Bitcoins And Beginners Guide Here: http://coindesk.com/information/how-can-i-buy-bitcoins _______________________________________________ [+] Attention! [+] [-] Do Not Rename Encrypted Files. [-] Do Not Try To Decrypt Your Data Using Third Party -Software, It May Cause Permanent Data Loss. [-] Decryption Of Your Files With The Help Of Third Parties May Cause Increased Price (They Add Their Fee To Our) Or You Can Become A Victim Of A Scam. _________________DARKCRYPT_Ransomware___________________
Emails

Filemgr@tutanota.com

Cryptor6@tutanota.com

URLs

http://coindesk.com/information/how-can-i-buy-bitcoins

Extracted

Path

C:\Users\Admin\AppData\Local\Temp\WannaScream.hta

Ransom Note
All your files have been encrypted by Wanna Scream! due to a security problem with your PC. If you want to restore them, write us to the e-mail Filemgr@tutanota.com Write this ID in the title of your message: 949CEBC7 In case of no answer in 24 hours write us to this e-mail: Cryptor6@tutanota.com You have to pay for decryption in Bitcoins. The price depends on how fast you write to us. After payment we will send you the tool that will decrypt all your files. Free decryption as guarantee Before paying you can send us up to 5 files for free decryption. The total size of files must be less than 4Mb (non archived), and files should not contain valuable information. (databases,backups, large excel sheets, etc.) How to obtain Bitcoins The easiest way to buy bitcoins is LocalBitcoins site. You have to register, click 'Buy bitcoins', and select the seller by payment method and price. https://localbitcoins.com/buy_bitcoins Also you can find other places to buy Bitcoins and beginners guide here: http://www.coindesk.com/information/how-can-i-buy-bitcoins/ Attention! Do not rename encrypted files. Do not try to decrypt your data using third party software, it may cause permanent data loss. Decryption of your files with the help of third parties may cause increased price (they add their fee to our) or you can become a victim of a scam.
Emails

Filemgr@tutanota.com

Cryptor6@tutanota.com

Signatures

  • DarkCrypt

    Another variant of WannaCry ransomware (Imitation).

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Disables Task Manager via registry modification
  • Modifies extensions of user files 2 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Drops startup file 3 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Modifies registry class 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2F8D2E2177EE32CA380C4EDF4F7160D4.bin.exe
    "C:\Users\Admin\AppData\Local\Temp\2F8D2E2177EE32CA380C4EDF4F7160D4.bin.exe"
    1⤵
    • Modifies extensions of user files
    • Drops startup file
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4004
    • C:\Windows\SYSTEM32\cmd.exe
      "cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3412
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:3396
    • C:\Windows\SysWOW64\mshta.exe
      "C:\Windows\SysWOW64\mshta.exe" "C:\Users\Admin\AppData\Local\Temp\WannaScream.hta" {1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}{1E460BD7-F1C3-4B2E-88BF-4E770A288AF5}
      2⤵
        PID:3064
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3116

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Defense Evasion

    File Deletion

    2
    T1107

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    System Information Discovery

    1
    T1082

    Collection

    Data from Local System

    1
    T1005

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\WannaScream.hta
      MD5

      fb2bf10a3484c6a231aa54cb72371c24

      SHA1

      610e98bbd86a91e983795c5443f319ccc1dbe361

      SHA256

      d0479aa5c8179c1ec85fd2f3e438e6535536c87856aac16aa6e1f86de8deb6ce

      SHA512

      df8974f14c90fffb03750a202c1e64dfaed166bfaaa6041e9c124e794bd2965d22a78da98554d15b4db1296ab6bd81c410ffa3391dd8544aadcb1ec14a902be5

    • memory/3064-2-0x0000000000000000-mapping.dmp
    • memory/3396-1-0x0000000000000000-mapping.dmp
    • memory/3412-0-0x0000000000000000-mapping.dmp