Analysis

  • max time kernel
    8s
  • max time network
    105s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-01-2024 15:12

General

  • Target

    7e623dca8a26a45440c331e383ac6ce3783d5c1bd60b91ee91ce0cc5841633e2.exe

  • Size

    219KB

  • MD5

    419ac67a37befc87317f2263e43bbccb

  • SHA1

    9a85595a04ac9f2c2b3dbf2a3ec171fc4486e3dd

  • SHA256

    7e623dca8a26a45440c331e383ac6ce3783d5c1bd60b91ee91ce0cc5841633e2

  • SHA512

    5a1fcacd280ba94f5178db1934b1122cf8e4359372e09812a57ae5601060e78f38f402a24a2b04dfe2fb7f6052cecce68df0aa9f41b48db34513cade81cd1969

  • SSDEEP

    3072:W5LZvmXjUjS/oewQhcyibDoO1iPN2HuzNUYi821BNL5kQdL:yLmQu/tJcToO1mNSuWYWIQN

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta

Ransom Note
All your files have been encrypted! All your files have been encrypted due to a security problem with your PC. If you want to restore them, write us to the e-mail decrypt@fros.cc Write this ID in the title of your message C2E90A1A In case of no answer in 24 hours write us to theese e-mails: decrypt@fros.cc 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 1 file for free decryption. The total size of files must be less than 1Mb (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

decrypt@fros.cc

Signatures

  • Dharma

    Dharma is a ransomware that uses security software installation to hide malicious activities.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (93) files with added filename extension

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

  • Drops startup file 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 4 IoCs
  • Drops file in System32 directory 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\7e623dca8a26a45440c331e383ac6ce3783d5c1bd60b91ee91ce0cc5841633e2.exe
    "C:\Users\Admin\AppData\Local\Temp\7e623dca8a26a45440c331e383ac6ce3783d5c1bd60b91ee91ce0cc5841633e2.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:1608
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4900
      • C:\Windows\system32\vssadmin.exe
        vssadmin delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:1392
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:4752
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
          PID:7248
          • C:\Windows\system32\mode.com
            mode con cp select=1251
            3⤵
              PID:5968
            • C:\Windows\system32\vssadmin.exe
              vssadmin delete shadows /all /quiet
              3⤵
              • Interacts with shadow copies
              PID:9236
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            2⤵
              PID:5416
            • C:\Windows\System32\mshta.exe
              "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
              2⤵
                PID:5180
            • C:\Windows\system32\vssvc.exe
              C:\Windows\system32\vssvc.exe
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:2456

            Network

            MITRE ATT&CK Matrix ATT&CK v13

            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

            Indicator Removal

            2
            T1070

            File Deletion

            2
            T1070.004

            Modify Registry

            1
            T1112

            Impact

            Inhibit System Recovery

            2
            T1490

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Program Files\Google\Chrome\Application\106.0.5249.119\icudtl.dat.id-C2E90A1A.[decrypt@fros.cc].bgtx
              MD5

              d41d8cd98f00b204e9800998ecf8427e

              SHA1

              da39a3ee5e6b4b0d3255bfef95601890afd80709

              SHA256

              e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

              SHA512

              cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

            • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta
              Filesize

              13KB

              MD5

              a89dbd7333156aa0dd41b6ee12be4e0e

              SHA1

              c9ed08546c6c4771a622c936fc3ed5047a4042f5

              SHA256

              83cfcd6e47c334aaf306ad1452b3c0d4e116905707ecec9010bb128126353cbf

              SHA512

              25ef7a4c7727f561ff0ffccfd63b7196634f7f60433dcb11331ba5b410e82a5b9cc47c98ce6fa9d2c99f869ba624a2fe153a6d783e81ec7946084a4e6ed70005

            • memory/1608-2-0x0000000000400000-0x000000000043C000-memory.dmp
              Filesize

              240KB

            • memory/1608-1-0x0000000000690000-0x0000000000790000-memory.dmp
              Filesize

              1024KB

            • memory/1608-10662-0x0000000000400000-0x000000000043C000-memory.dmp
              Filesize

              240KB

            • memory/1608-23884-0x0000000000690000-0x0000000000790000-memory.dmp
              Filesize

              1024KB