Resubmissions

20-04-2024 20:00

240420-yq739age58 10

20-04-2024 19:55

240420-ym7y3sha3x 10

General

  • Target

    Lecture13.exe

  • Size

    581KB

  • Sample

    240420-ym7y3sha3x

  • MD5

    ef5a79a25dba6d0326cfd3649733997f

  • SHA1

    028c9978bf83c92fbeabde7385fc72e9dcdf3687

  • SHA256

    3f05a04c0f8fe2afb55e3c56034587edfa8fa6edd6c44725fed4c4bd8bd03135

  • SHA512

    ec542d405c1490f6f715ac1d49de9ba7f4cf3d0a9b9cba5f0512af8068e57b5bbb07e474b307cd39e137cd6a8565f9fd16fdcbbebef06b6e2ab73b167585d13a

  • SSDEEP

    12288:iLCMgX/tPAyOWyRanlo0/MQorIQQ4ijZX7EIHaIIan64Gn0PkQ9cqDbNV763o+RR:iRgPtPfZ9loCpQQvjh7EIHaOt/PkQyuy

Malware Config

Extracted

Path

C:\ProgramData\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 coronavirus@qq.com Write this ID in the title of your message 638FD19E In case of no answer in 24 hours write us to theese e-mails: coronavirus@qq.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 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

coronavirus@qq.com

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 coronavirus@qq.com Write this ID in the title of your message B72ED6A2 In case of no answer in 24 hours write us to theese e-mails: coronavirus@qq.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 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

coronavirus@qq.com

Targets

    • Target

      Lecture13.exe

    • Size

      581KB

    • MD5

      ef5a79a25dba6d0326cfd3649733997f

    • SHA1

      028c9978bf83c92fbeabde7385fc72e9dcdf3687

    • SHA256

      3f05a04c0f8fe2afb55e3c56034587edfa8fa6edd6c44725fed4c4bd8bd03135

    • SHA512

      ec542d405c1490f6f715ac1d49de9ba7f4cf3d0a9b9cba5f0512af8068e57b5bbb07e474b307cd39e137cd6a8565f9fd16fdcbbebef06b6e2ab73b167585d13a

    • SSDEEP

      12288:iLCMgX/tPAyOWyRanlo0/MQorIQQ4ijZX7EIHaIIan64Gn0PkQ9cqDbNV763o+RR:iRgPtPfZ9loCpQQvjh7EIHaOt/PkQyuy

    • Dharma

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

    • Deletes shadow copies

      Ransomware often targets backup files to inhibit system recovery.

    • Renames multiple (312) files with added filename extension

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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Drops startup file

    • Reads user/profile data of web browsers

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

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Adds Run key to start application

    • Drops desktop.ini file(s)

    • Drops file in System32 directory

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

2
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Collection

Data from Local System

1
T1005

Impact

Inhibit System Recovery

2
T1490

Tasks