Analysis
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max time kernel
1800s -
max time network
1800s -
platform
windows7_x64 -
resource
win7-en-20211014 -
submitted
27-10-2021 09:06
General
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Target
de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d.exe
Score
10/10
Malware Config
Extracted
Path
C:\Users\Admin\Desktop\7C5FC-Readme.txt
Family
netwalker
Ransom Note
Hi!
Your files are encrypted.
All encrypted files for this computer has extension: .7c5fc
--
If for some reason you read this text before the encryption ended,
this can be understood by the fact that the computer slows down,
and your heart rate has increased due to the ability to turn it off,
then we recommend that you move away from the computer and accept that you have been compromised,
rebooting/shutdown will cause you to lose files without the possibility of recovery and even god will not be able to help you,
it could be files on the network belonging to other users, sure you want to take that responsibility?
--
Our encryption algorithms are very strong and your files are very well protected, you can't hope to recover them without our help.
The only way to get your files back is to cooperate with us and get the decrypter program.
Do not try to recover your files without a decrypt program, you may damage them and then they will be impossible to recover.
We advise you to contact us as soon as possible, otherwise there is a possibility that your files will never be returned.
For us this is just business and to prove to you our seriousness, we will decrypt you some files for free,
but we will not wait for your letter for a long time, mail can be abused, we are moving on, hurry up with the decision.
Contact us:
1.knoocknoo@cock.li
2.eeeooppaaaxxx@tuta.io
Don't forget to include your code in the email:
{code_1b1ea859_7c5fc:
oQnkiN87TGRzrsE0gTzDlDR9xb2jZjHAwnX0PY/AioYAD+080f
UNARlbAznLYec3zzyn2BH/MJGxUTISTaYteCAc/uvGo7J1Wage
G6yjUQ1AtIOTsJ0KtOPth5q/33ut3tn7ta101XXQKu35jI+K9d
ogzUJJaFJsp78eboRmk+PJrOiDzgyHyJEaWjQ4F3vkW5SqoZHL
nurcbhdqh0HF9yiiAFO+d32hgkhE3UAAv9o7+xDSvEVps9UZpm
6rrs9h/5B3Dp/uZhF8oejy8pR50x4ZsyQ=}
Emails
knoocknoo@cock.li
eeeooppaaaxxx@tuta.io
Signatures
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Detected Netwalker Ransomware 2 IoCs
Detected unpacked Netwalker executable.
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Netwalker Ransomware
Ransomware family with multiple versions. Also known as MailTo.
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Deletes shadow copies 2 TTPs
Ransomware often targets backup files to inhibit system recovery.
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Deletes itself 1 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
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Suspicious use of SetThreadContext 2 IoCs
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Drops file in Program Files directory 64 IoCs
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Interacts with shadow copies 2 TTPs 2 IoCs
Shadow copies are often targeted by ransomware to inhibit system recovery.
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Suspicious behavior: EnumeratesProcesses 64 IoCs
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Suspicious behavior: MapViewOfSection 2 IoCs
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Suspicious use of AdjustPrivilegeToken 6 IoCs
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Suspicious use of WriteProcessMemory 20 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d.exe"C:\Users\Admin\AppData\Local\Temp\de04d2402154f676f757cf1380671f396f3fc9f7dbb683d9461edd2718c4e09d.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"2⤵
- Deletes itself
- Adds Run key to start application
- Suspicious use of SetThreadContext
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\explorer.exe"C:\Windows\system32\explorer.exe"3⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet4⤵
- Interacts with shadow copies
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C:\Windows\SysWOW64\notepad.exeC:\Windows\system32\notepad.exe "C:\Users\Admin\Desktop\7C5FC-Readme.txt"3⤵
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C:\Windows\system32\vssadmin.exeC:\Windows\system32\vssadmin.exe delete shadows /all /quiet3⤵
- Interacts with shadow copies
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
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C:\Users\Admin\Desktop\7C5FC-Readme.txtMD5
c88514da33d754880025384233b2f590
SHA1b939983782376c65fa429707cb9d0ea4fc7432cb
SHA25678bde8b81f809f34c546937a8138c1657a3a74ce83a39e4a41eef4c75a8315f3
SHA512a9322a115eef87d19fda2d62c674a72d9520ea3ca5c1da50b4de20dedf7def5919469ebaaa9e16594fbe3c1e0692dd99533ec18ef686faadc2826b406e3a98ca
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memory/324-60-0x0000000000000000-mapping.dmp
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memory/324-64-0x0000000000080000-0x000000000009B000-memory.dmpFilesize
108KB
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memory/864-56-0x0000000000000000-mapping.dmp
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memory/864-58-0x0000000075481000-0x0000000075483000-memory.dmpFilesize
8KB
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memory/864-59-0x0000000000080000-0x000000000009B000-memory.dmpFilesize
108KB
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memory/1476-63-0x0000000000000000-mapping.dmp
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memory/1608-55-0x0000000075B71000-0x0000000075B73000-memory.dmpFilesize
8KB
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memory/5908-65-0x0000000000000000-mapping.dmp
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memory/6732-68-0x0000000000000000-mapping.dmp