Analysis
- max time kernel
42s - max time network
36s - platform
windows10-2004_x64 - resource
win10v2004-20240709-en - resource tags
- submitted
23/07/2024, 18:10
General
- Target f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe
- Size 790KB
- Sample240723-wr28aasapl
- SHA256 f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01
Malware Config
Extracted
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djvu
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http://cajgtus.com/test1/get.php
-
extension
.watz
-
offline_id
Lc3VTezPWbMhuVAQFzJUdeA68PwI7UDpc5aKHYt1
- payload_url
-
ransomnote
ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. Do not ask assistants from youtube and recovery data sites for help in recovering your data. They can use your free decryption quota and scam you. Our contact is emails in this text document only. You can get and look video overview decrypt tool: https://wetransfer.com/downloads/abe121434ad837dd5bdd03878a14485820240531135509/34284d Price of private key and decrypt software is $999. Discount 50% available if you contact us first 72 hours, that's price for you is $499. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0874PsawqS
Signatures
- Detected Djvu ransomware 16 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Modifies file permissions 1 TTPs 1 IoCs
- Adds Run key to start application 2 TTPs 1 IoCs
- Looks up external IP address via web service 3 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.
- Suspicious use of SetThreadContext 2 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- System Location Discovery: System Language Discovery 1 TTPs 5 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Opens file in notepad (likely ransom note) 1 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 26 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe"C:\Users\Admin\AppData\Local\Temp\f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe"C:\Users\Admin\AppData\Local\Temp\f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\8eaaa9fd-051c-4565-a746-00ce78b5270e" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
- System Location Discovery: System Language Discovery
-
-
C:\Users\Admin\AppData\Local\Temp\f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe"C:\Users\Admin\AppData\Local\Temp\f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe"C:\Users\Admin\AppData\Local\Temp\f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe" --Admin IsNotAutoStart IsNotTask4⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
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-
-
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding1⤵
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C:\Windows\system32\NOTEPAD.EXE"C:\Windows\system32\NOTEPAD.EXE" C:\SystemID\PersonalID.txt1⤵
- Opens file in notepad (likely ransom note)
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
PersonalID.txt
8B2B9A00839EED1DFDCCC3BFC2F5DF12
B46811C17859FFB409CF0E904A4AA8F8
8B2B9A00839EED1DFDCCC3BFC2F5DF12
B46811C17859FFB409CF0E904A4AA8F8
f874d2ec768aac73111ccc280352a8769b03d1789327b0b3e9674c55e0de1c01.exe
memory/376-2-0x0000000004430000-0x000000000454B000-memory.dmp
memory/376-1-0x0000000004280000-0x000000000431F000-memory.dmp
memory/3256-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3256-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3256-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3256-19-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3256-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-30-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-24-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-38-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-39-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-40-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4192-22-0x0000000000400000-0x0000000000537000-memory.dmp