Resubmissions

02-07-2024 18:11

240702-wsxn7avbph 10

02-07-2024 18:01

240702-wl4txsvarf 10

Analysis

  • max time kernel
    204s
  • max time network
    182s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    02-07-2024 18:11

General

  • Target

    CoronaVirus.exe

  • Size

    1.0MB

  • MD5

    055d1462f66a350d9886542d4d79bc2b

  • SHA1

    f1086d2f667d807dbb1aa362a7a809ea119f2565

  • SHA256

    dddf7894b2e6aafa1903384759d68455c3a4a8348a7e2da3bd272555eba9bec0

  • SHA512

    2c5e570226252bdb2104c90d5b75f11493af8ed1be8cb0fd14e3f324311a82138753064731b80ce8e8b120b3fe7009b21a50e9f4583d534080e28ab84b83fee1

  • SSDEEP

    24576:FRYz/ERA0eMuWfHvgPw/83JI8CorP9qY0:FE/yADMuYvgP93JIc2

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 [email protected] Write this ID in the title of your message 0EA0F9B0 In case of no answer in 24 hours write us to theese e-mails: [email protected] 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.

Signatures

  • Dharma

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

  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (439) files with added filename extension

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

  • Drops startup file 5 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 3 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Drops file in System32 directory 2 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 64 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Interacts with shadow copies 3 TTPs 2 IoCs

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

  • Modifies data under HKEY_USERS 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: LoadsDriver 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of FindShellTrayWindow 37 IoCs
  • Suspicious use of SendNotifyMessage 36 IoCs
  • Suspicious use of WriteProcessMemory 16 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\CoronaVirus.exe
    "C:\Users\Admin\AppData\Local\Temp\CoronaVirus.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:2428
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2740
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:14352
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:15756
      • C:\Windows\system32\cmd.exe
        "C:\Windows\system32\cmd.exe"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:15332
        • C:\Windows\system32\mode.com
          mode con cp select=1251
          3⤵
            PID:15656
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:16480
        • 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:15904
          • C:\Windows\System32\mshta.exe
            "C:\Windows\System32\mshta.exe" "C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Startup\Info.hta"
            2⤵
              PID:15972
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:16188
          • C:\Windows\system32\NOTEPAD.EXE
            "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\FILES ENCRYPTED.txt
            1⤵
              PID:17232
            • C:\Windows\system32\taskmgr.exe
              "C:\Windows\system32\taskmgr.exe" /4
              1⤵
              • Drops file in Windows directory
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SendNotifyMessage
              PID:17332
            • C:\Windows\System32\SystemSettingsBroker.exe
              C:\Windows\System32\SystemSettingsBroker.exe -Embedding
              1⤵
                PID:18452
              • \??\c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k localservicenetworkrestricted -s RmSvc
                1⤵
                  PID:18548
                • \??\c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k localservice -s SstpSvc
                  1⤵
                    PID:18564
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k netsvcs -s DsmSvc
                    1⤵
                    • Checks SCSI registry key(s)
                    • Modifies data under HKEY_USERS
                    PID:18688
                  • \??\c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s NetSetupSvc
                    1⤵
                    • Drops file in Windows directory
                    • Suspicious use of AdjustPrivilegeToken
                    PID:18804
                  • \??\c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s RasMan
                    1⤵
                      PID:19084
                    • \??\c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s RasMan
                      1⤵
                        PID:19616
                      • C:\Windows\System32\SystemSettingsBroker.exe
                        C:\Windows\System32\SystemSettingsBroker.exe -Embedding
                        1⤵
                          PID:19876
                        • \??\c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s RasMan
                          1⤵
                            PID:19940
                          • C:\Windows\system32\AUDIODG.EXE
                            C:\Windows\system32\AUDIODG.EXE 0x3a4
                            1⤵
                            • Suspicious use of AdjustPrivilegeToken
                            PID:20080
                          • C:\Windows\system32\NOTEPAD.EXE
                            "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\FILES ENCRYPTED.txt
                            1⤵
                            • Suspicious use of FindShellTrayWindow
                            PID:20532
                          • C:\Windows\System32\rundll32.exe
                            C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                            1⤵
                              PID:20684
                            • \??\c:\windows\system32\svchost.exe
                              c:\windows\system32\svchost.exe -k localservice -s fdPHost
                              1⤵
                                PID:21508

                              Network

                              MITRE ATT&CK Enterprise v15

                              Replay Monitor

                              Loading Replay Monitor...

                              Downloads

                              • C:\Program Files\Common Files\microsoft shared\ClickToRun\AppvIsvSubsystems32.dll.id-0EA0F9B0.[[email protected]].ncov
                                Filesize

                                2.7MB

                                MD5

                                bdb2769b1ecc7356cbc2483e95f112ca

                                SHA1

                                bc5c4d6f274d9b155ff39f5bf2c65a8ac24c037d

                                SHA256

                                086a41672b8eee51ebd309fc4d82653d10c75f9194cdc0198109f1be7c2d45a7

                                SHA512

                                2d930490c64095bb0ca774ee0a384098d6583b090d2202c51c61aa48ad703e7eec8d04245677b4f30cf47ff60f32e3554d677f9707d8e94efe100db060d8f366

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

                                13KB

                                MD5

                                bf18a5865d87f2f691085b3ee0d9de5f

                                SHA1

                                378faaebbe956437cdd2098fcd16c3b0432392b7

                                SHA256

                                14ea3e5f750c0f45e384f7bcfc2ae53d209a1a536bcfb7612f4488fe1b921048

                                SHA512

                                d5c35693163e63dfca79a1ef9aa23ad58b95552309f38fbb1409720eb3b0a79bc57eb6ac91ca0861cb133a75c832d2ac7133946459a1c9333883bd0fabfe64a5

                              • C:\Users\Admin\Desktop\FILES ENCRYPTED.txt
                                Filesize

                                170B

                                MD5

                                21539971cae3b6278ce678b16b3f2643

                                SHA1

                                f4357280ca6838b0b62e610c6ffc24d1ab615e37

                                SHA256

                                b386715edcdb5fbb762f2308d588c5a67bfe65745105b87228596885e4715045

                                SHA512

                                43f07a7df1bf14f76f60424219f00c051f4097f222f3b453cd208449f30e4915745300ad89f45a738bd828c7691fe97c0a16fa58115057d4ccf0e1784b46a7db

                              • C:\Windows\INF\netrasa.PNF
                                Filesize

                                22KB

                                MD5

                                80648b43d233468718d717d10187b68d

                                SHA1

                                a1736e8f0e408ce705722ce097d1adb24ebffc45

                                SHA256

                                8ab9a39457507e405ade5ef9d723e0f89bc46d8d8b33d354b00d95847f098380

                                SHA512

                                eec0ac7e7abcf87b3f0f4522b0dd95c658327afb866ceecff3c9ff0812a521201d729dd71d43f3ac46536f8435d4a49ac157b6282077c7c1940a6668f3b3aea9

                              • C:\Windows\INF\netsstpa.PNF
                                Filesize

                                6KB

                                MD5

                                01e21456e8000bab92907eec3b3aeea9

                                SHA1

                                39b34fe438352f7b095e24c89968fca48b8ce11c

                                SHA256

                                35ad0403fdef3fce3ef5cd311c72fef2a95a317297a53c02735cda4bd6e0c74f

                                SHA512

                                9d5153450e8fe3f51f20472bae4a2ab2fed43fad61a89b04a70325559f6ffed935dd72212671cc6cfc0288458d359bc71567f0d9af8e5770d696adc5bdadd7ec

                              • memory/2428-0-0x0000000000400000-0x000000000056F000-memory.dmp
                                Filesize

                                1.4MB

                              • memory/2428-1-0x000000000AD30000-0x000000000AD64000-memory.dmp
                                Filesize

                                208KB

                              • memory/2428-2-0x0000000000400000-0x000000000056F000-memory.dmp
                                Filesize

                                1.4MB

                              • memory/2428-22120-0x0000000000400000-0x000000000056F000-memory.dmp
                                Filesize

                                1.4MB

                              • memory/2428-22134-0x000000000AD30000-0x000000000AD64000-memory.dmp
                                Filesize

                                208KB