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Iranian Hackers Ship New ‘Fantasy’ Wiper to Diamond Business through Provide Chain Assault

By Ionut Arghire on December 08, 2022

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An Iran-linked superior persistent risk (APT) actor named Agrius is utilizing a brand new wiper in assaults focusing on entities in South Africa, Israel and Hong Kong, cybersecurity agency ESET studies.

Primarily centered on victims in Israel and the United Arab Emirates, Agrius is a risk actor energetic since at the least 2020, exploiting recognized vulnerabilities for preliminary entry.

The adversary was beforehand seen utilizing the Apostle wiper disguised as ransomware, and later updating the malware right into a fully-fledged ransomware. Dubbed Fantasy, the newly recognized wiper is constructed based mostly on Apostle, however doesn’t try to masquerade as ransomware.

As a part of the not too long ago noticed assaults, Agrius focused an Israeli software program developer that gives a software program suite to organizations within the diamond trade. The availability chain assault allowed the risk actor to contaminate the developer’s prospects with the brand new Fantasy wiper.

Fantasy was first used towards a diamond trade agency in South Africa in March 2022, roughly three weeks after the group was contaminated with credential-harvesting instruments, seemingly in preparation for the wiping assault.

After performing reconnaissance and lateral motion, Agrius deployed a Fantasy execution device dubbed Sandals, and launched the wiper. Written in C# and .NET, Fantasy and Sandals have been then each utilized in assaults towards victims in Israel and Hong Kong.

ESET recognized 5 Fantasy victims, together with a diamond wholesaler, an HR consulting agency, and an IT help providers supplier in Israel, the South African group from the diamond trade, and a jeweler in Hong Kong.

All victims have been prospects of the software program developer, the Fantasy wiper was named equally with the reputable software program, and the wiper was executed on all sufferer programs from the Temp listing, inside a 2.5 hours timeframe. All victims seemingly already used PsExec, which Agrius employed to mix in.

The assault lasted lower than three hours, with the software program developer pushing out clear updates solely hours later. ESET says that it tried to contact the software program developer in regards to the potential compromise, nevertheless it obtained no response.

Different instruments deployed through the assault embody MiniDump (for credential harvesting from LSASS dumps), SecretsDump (hashes dumper), and Host2IP (hostname resolver).

Delicate data akin to usernames, passwords, and hostnames harvested utilizing these instruments have been then utilized by Sandals for lateral motion and for the wiper’s execution.

“Sandals doesn’t write the Fantasy wiper to distant programs. We imagine that the Fantasy wiper is deployed through a supply-chain assault utilizing the software program developer’s software program replace mechanism,” ESET notes.

Fantasy’s wiping routine includes changing the contents of focused information after which deleting these information. The wiper additionally clears all Home windows occasion logs, makes an attempt to delete all information on the system drive, to clear file system cache reminiscence, and to overwrite the system’s Grasp Boot File, and deletes itself.

Most of Fantasy’s code base is straight copied from Apostle, with lots of its capabilities solely barely modified from Apostle, and with many execution move similarities additionally noticed, indicating that Agrius is behind this malware as properly, ESET notes.

Associated: New Iranian Group ‘Agrius’ Launches Damaging Cyberattacks on Israeli Targets

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