Ordinypt Wiper

A new variant of HSDFSDCrypt Ransomware, called Ordinypt, has been observed being used in a recent attack. When downloaded, Ordinypt does not encrypt the user’s files but instead rewrites them with random data.

Threat ID:: CC-1780
Category:: Ransomware
Threat Severity:: Medium
Threat Vector:: Download, Email spam
Published:: 16 November 2017 12:00 AM

Report a cyber attack: call 0300 303 5222 or email [email protected]

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Summary

Affected platforms

The following platforms are known to be affected:

Microsoft Windows

Microsoft Windows – all versions

Threat details

A ransom note is download to each folder when it's contents is replaced.

Ordinypt does not have any self-propagation methods and is, at the time of publication, only spread via a malicious email written in German. The body of the email appears to be a reply to a job advert with an attached .jpg file and a .zip file. The .zip file contains a fake .pdf files. Once the fake .pdf files, the executables download the malware.

Remediation steps

Type	Step
	If a computer on your network becomes infected with this type of wiper it will begin encrypting local machine files and files on any network the logged-in user has permission to access. For system administration accounts this may include backup storage locations. To avoid becoming infected with Ordinypt, ensure that: A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails. All operating systems, antivirus and other security products are kept up to date. All day to day computer activities such as email and internet are performed using non-administrative accounts and that permissions are always assigned on the basis of least privilege. Your organisation adopts a holistic all round approach to Cyber Security as advocated by the 10 Steps To Cyber Security. Identifying the source of infection: Identifying the infected machine and unplugging / disconnecting or quarantining it from the network is essential to damage limitation. Users should immediately report infections to their IT support provider, disconnect their network cable and power the computer down. File auditing should be enabled and file server logs should be monitored to detect signs of unauthorised encryption and allow the source of encryption to be identified (i.e. the infected PC). To limit the damage of this malware and enable recovery: All critical data must be backed up, and these backups must be sufficiently protected/kept out of reach of malware. Multiple backups should be created including at least one off-network backup (e.g. to tape). The only guaranteed way to recover from a wiper infection is to restore all affected files from their most recent backup.

Type

Step

If a computer on your network becomes infected with this type of wiper it will begin encrypting local machine files and files on any network the logged-in user has permission to access. For system administration accounts this may include backup storage locations.

To avoid becoming infected with Ordinypt, ensure that:

A robust program of education and awareness training is delivered to users to ensure they don’t open attachments or follow links within unsolicited emails.
All operating systems, antivirus and other security products are kept up to date.
All day to day computer activities such as email and internet are performed using non-administrative accounts and that permissions are always assigned on the basis of least privilege.
Your organisation adopts a holistic all round approach to Cyber Security as advocated by the 10 Steps To Cyber Security.

Identifying the source of infection:

Identifying the infected machine and unplugging / disconnecting or quarantining it from the network is essential to damage limitation.

Users should immediately report infections to their IT support provider, disconnect their network cable and power the computer down.
File auditing should be enabled and file server logs should be monitored to detect signs of unauthorised encryption and allow the source of encryption to be identified (i.e. the infected PC).

To limit the damage of this malware and enable recovery:

All critical data must be backed up, and these backups must be sufficiently protected/kept out of reach of malware.

Multiple backups should be created including at least one off-network backup (e.g. to tape).

The only guaranteed way to recover from a wiper infection is to restore all affected files from their most recent backup.

Last edited: 11 January 2022 4:44 pm