Welcome to the Virus Encyclopedia of Panda Security.
Cryzip.A compresses into password-protected ZIP format all the files with any of the following extensions: ARH, ARJ, ASM, BAS, C, CDR, CGI, CHM, CPP, DB, DB1, DB2, DBF, DBT, DBX, DOC, FRM, FRT, FRX, GTD, GZ, GZIP, JPG, KEY, KWM, LST, MAN, MDB, MMF, MO, OLD, P12, PAK, PAS, PDF, PGP, PL, PWL, PWM, RAR, RTF, SAFE, TAR, TXT, XLS, XML, ZIP.
These extensions include Word documents, Excel spreadsheets, Access databases, text files, JPG pictures, files compressed using WinZip, WinRAR and ARJ, etc.
Users will not be able to open those files until they obtain the password. Cryzip.A creates a text file with instructions about how to pay for the password using e-gold.
If you have been affected by this Trojan, the password to decompress the files is the following:
C:\Program Files\Microsoft Visual Studio\VC98
Additionally, it overwrites the files mentioned above with the text string Erased by Zippo! GO OUT!!! and then, deletes them. This way, these files cannot be retrieved even if a special tool for recovering deleted files is used.
Cryzip.A creates the following files:
- For each one of the files that it compresses with a password, Cryzip.A creates another file with the same name, to which it adds the text string _CRYPT_.ZIP.
- AUTO_ZIP_REPORT.TXT, which contains instructions in order to purchase from the swindlers a certain tool that unzips all the files.
Cryzip.A modifies all the files with any of the following extensions: ARH, ARJ, ASM, BAS, C, CDR, CGI, CHM, CPP, DB, DB1, DB2, DBF, DBT, DBX, DOC, FRM, FRT, FRX, GTD, GZ, GZIP, JPG, KEY, KWM, LST, MAN, MDB, MMF, MO, OLD, P12, PAK, PAS, PDF, PGP, PL, PWL, PWM, RAR, RTF, SAFE, TAR, TXT, XLS, XML and ZIP, as it compresses them into password-protected ZIP files.
Means of transmission
Cryzip.A does not spread automatically using its own means. It needs an attacking user's intervention in order to reach the affected computer. The means of transmission used include, among others, floppy disks, CD-ROMs, email messages with attached files, Internet downloads, FTP, IRC channels, peer-to-peer (P2P) file sharing networks, etc.
Cryzip.A is written in the programming language Visual C++. This Trojan is 1,191,936 bytes in size.