DexCrypt MBRLocker Demands 30 Yuan To Gain Access to Computer
By Lawrence Abrams
Published: 2018-02-10 · Archived: 2026-04-05 14:52:41 UTC
A new Chinese MBRLocker called DexLocker has been discovered that asks for 30 Yuan to get access to a computer. First
discovered by security researcher JAMESWT, this ransomware will modify the master boot record of the victim's computer
so that it shows a ransom note before Windows starts.
Unfortunately, I was not able to get this sample to run, so I have no first hand analysis of this ransomware. The AnyRun
video posted by JAMESWT, though, shows that once you install the ransomware, it immediately reboots the computer and
the victim is greeted with an ascii skull and a message to send 30 yaun to the 2055965068 qq address in order to get access
to their computer again.
DexCrypt Lock Screen
Microsoft's Windows Defender Security Team saw Jame's tweet and tweeted that they have labeled the MBRLocker
as Ransom:DOS/Dexcrypt.A and that it can be detected by Windows Defender.
According to kangxiaopao, you can enter the ssssss password to gain access. If this password does not work and it does only
replace the MBR, it can be fixed by booting up into the Windows Recovery Console and restoring the Master Boot Record
using the following commands:
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bootrec /RebuildBcd
bootrec /fixMbr
bootrec /fixboot
Once you enter these commands, you can reboot and get access again to Windows again.
IOCs
Hashes:
dfc56a704b5e031f3b0d2d0ea1d06f9157758ad950483b44ac4b77d33293cb38
Ransom Note:
 .-' '-.
 / \
 | |
 |, .-. .-. ,|
 | )(__/ \__)( |
 |/ /\ \|
 (_ ^^ _)
 \__|IIIIII|__/
 | \IIIIII/ |
 \ /
 `yao mi ma gei 30 yuan jia qq 2055965068`
Automated Pentesting Covers Only 1 of 6 Surfaces.
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Source: https://www.bleepingcomputer.com/news/security/dexcrypt-mbrlocker-demands-30-yuan-to-gain-access-to-computer/
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