Below are some hdb and mdb signatures for AstraLocker ransomware. This version of the ransom malware is distributed directly from Word files and targets scores of systems world-wide.

Copy mdb signatures to a new Notepad or similar text writer file and save it in the ClamWin database folder as a file named Sigfile.mdb, with a file type of “All Files”. Do not save the file as a text file. The file name should be Sigfile.mdb and nothing else.

Copy hdb signatures to a new Notepad or similar text writer file and save it in the ClamWin database folder as a file named Sigfile.hdb, with a file type of “All Files”. Do not save the file as a text file. The file name should be Sigfile.hdb and nothing else.

For multiple signatures, put each signature on a separate line in a Notepad or similar file. Put mdb and hdb signatures in separate files. You can add multiple signatures to the top of an existing mdb or hdb signature file. Copy the signatures, add one blank line to the top of the file and paste the signatures there—any additional lines needed will be added. Do not add signatures to the bottom of existing hdb and mdb signature files or you will get a ClamWin scanning error. Delete any blank lines between signatures in a file before saving the file.

After you save a signature file (.hdb, .mdb or .yar) in the ClamWin database folder, scan a file with ClamWin to make sure it works. If you get a scan error, accept my apology, and delete the signature file from the database folder or delete only those signatures that you just posted to an existing mdb or hdb file and re-save it after first removing any blank lines in the signature file. For multiple signature files, run a scan after you save each file to help you locate a file that could cause a scan error.

After 4 weeks, the malware will probably be updated, so you can delete mdb and hdb signatures then. The date (USA) and time (24 hr) are the last two items in each mdb and hdb signature. Yara signatures can be kept permanently if they are not for a specific malware—keep those for two or three months.

Thanks to Bleeping Computer!

HDB Signatures
33fff5d2e84bd2fad9c82e6c1d7002be:733955:Office.Trojan.AstraLocker-063022.1137
9910f4d9dbb05b2d4e4f3919aebdd05a:733987:Office.Trojan.AstraLocker-063022.1139

MDB Signatures
4096:6b72b048bc2fb86cc3951e08b16e98cb:Win.Trojan.AstraLocker-063022.1131
25088:ff59858c90ba872afd259100117ace4e:Win.Trojan.AstraLocker-063022.1136

Regards,