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Dharma Arrow Ransomware


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8 replies to this topic

#1 XxsmurferxX

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Posted 01 July 2018 - 11:25 AM

Hi all,
I have this machine infected with ransomware. All files are encrypted with .arrow extension and after searching, i understand it is a variant of Dharma and do know currently no decryption yet.
However after doing some checking, i managed to recover some files from the machine. Hence would like to ask:
Q: Is it possible to provide any experts with original and encrypted files and there's a way to find out the private key?

Next, during the data recovery, i found a lot of files (kind of funny) that have this random 7 digits numbers and file is huge. For example like [2547852].pdf or [7785565].doc.
Also all these files are not overwritten, which means should be recently deleted?
Next, when all these files doesnt have the attributes like last modified, creation date, etc. Hence would see if any experts here can identify if it is a true file done by the ransomware and deleted it.

I also had submitted the ransomware sample named info.exe.
Anyone who can assist would be good to work together to recover the data.

Thanks!

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#2 quietman7

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Posted 01 July 2018 - 06:45 PM


Did you submit (upload) samples of encrypted files, ransom notes and any contact email addresses or hyperlinks provided by the cyber-criminals to ID Ransomware (IDR) for assistance with identification and confirmation? Uploading both encrypted files and ransom notes together provides a more positive match and helps to avoid false detections.
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#3 RSaryta

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Posted 03 July 2018 - 12:38 AM

EMSISOFT decrypt "decrypt_alnamrood.exe" almost works ...



#4 quietman7

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Posted 03 July 2018 - 05:30 AM

If the infection is confirmed as Dharma (CrySiS) with the .arrow extension, then it is not decryptable without paying the ransom and obtaining the private RSA keys from the criminals.
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#5 XxsmurferxX

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Posted 03 July 2018 - 06:54 AM

Hi all,
Thanks for the reply.

Hi quietman, i did submit. Not sure if they receive? If not have to resubmit.

Hi rsaryta, nope does not help. Tried cannot work.

#6 RSaryta

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Posted 03 July 2018 - 07:23 AM

Ok. Thanks



#7 quietman7

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Posted 03 July 2018 - 07:26 AM

Dharma (CrySiS) will leave files (ransom notes) with names like README.txt, README.jpg, Hello my vichtim.txt, Your personal data are encrypted!.txt, FILES ENCRYPTED.txt, Files encrypted!!.txt, info.hta.

These are examples of encrypted files...
.id-B8F053EC.[marat20@cock.li].arrow,
.id-E4B7FBD4.[ventablack@tutanota.de].arrow
.id-A65A461A.[realunlocker@india.com].arrow
.id-B8F053EC.[mindysnell2@aol.com].arrow

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#8 XxsmurferxX

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Posted 03 July 2018 - 08:10 AM

Hi Quietman, yes it does. Hence should be dharma variant... But whether properly know which type, then not sure.

Btw,do you have e decrypt software? Actually im thinking if i have the public key, i have source (original), encrypted file, and i do know more info like they need ID to decrypt, so ID could be some constant value. So are we able work out the private key?

#9 quietman7

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Posted 03 July 2018 - 04:04 PM

It is not decryptable without paying the ransom and obtaining the private RSA keys from the criminals.

There is an ongoing discussion in this topic where victims can post comments, ask questions and seek further assistance. Other victims have been directed there to share information, experiences and suggestions.Rather than have everyone with individual topics, it would be best (and more manageable for staff) if you posted any more questions, comments or requests for assistance in the above support topic discussion...it includes experiences by experts, a variety of IT consultants, end users and company reps who have been affected by ransomware infections. To avoid unnecessary confusion, this topic is closed.

Thanks
The BC Staff
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