Analysis
- max time kernel
124s - max time network
176s - platform
windows10-2004_x64 - resource
win10v2004-20220812-en - resource tags
- submitted
30/11/2022, 01:50
General
- Target ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe
- Size 658KB
- Sample221130-b9dbnabe2x
- SHA256 ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2
Malware Config
Extracted
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djvu
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http://fresherlights.com/test1/get.php
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extension
.uyro
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offline_id
HtkmULXEgJoZa495hFUJlvKCD0OwnxklbkoITjt1
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payload_url
http://uaery.top/dl/build2.exe
http://fresherlights.com/files/1/build3.exe
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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. You can get and look video overview decrypt tool: https://we.tl/t-5UcwRdS3ED Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. 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: 0609djfsieE
Extracted
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vidar
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56
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517
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https://t.me/asifrazatg
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https://steamcommunity.com/profiles/76561199439929669
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profile_id
517
Signatures
- Detected Djvu ransomware 10 IoCs
- Djvu Ransomware
Ransomware which is a variant of the STOP family.
- Vidar
Vidar is an infostealer based on Arkei stealer.
- Downloads MZ/PE file
- Executes dropped EXE 4 IoCs
- Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 2 IoCs
- Modifies file permissions 1 TTPs 1 IoCs
- Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Accesses 2FA software files, possible credential harvesting 2 TTPs
- Accesses cryptocurrency files/wallets, possible credential harvesting 2 TTPs
- Adds Run key to start application 2 TTPs 1 IoCs
- Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
- 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 3 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Creates scheduled task(s) 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of WriteProcessMemory 53 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe"C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe"C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe"2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\icacls.exeicacls "C:\Users\Admin\AppData\Local\2a943253-9511-4500-9f8a-cee737688b71" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe"C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe"C:\Users\Admin\AppData\Local\Temp\ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe"C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe"C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe"6⤵
- Executes dropped EXE
- Checks computer location settings
- Loads dropped DLL
- Checks processor information in registry
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\cmd.exe"C:\Windows\System32\cmd.exe" /c timeout /t 6 & del /f /q "C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build2.exe" & exit7⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\timeout.exetimeout /t 68⤵
- Delays execution with timeout.exe
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C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build3.exe"C:\Users\Admin\AppData\Local\24a55a43-fb76-47e3-82aa-ec825f53e0d0\build3.exe"5⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"6⤵
- Creates scheduled task(s)
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C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exeC:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe1⤵
- Executes dropped EXE
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\schtasks.exe/C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\mstsca.exe"2⤵
- Creates scheduled task(s)
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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
build2.exe
build2.exe
build2.exe
build3.exe
build3.exe
ac62cd6f8ea23d270b626dcbfde9bea8e6125ac1ff96e7cda0cf7032224ed3e2.exe
mstsca.exe
mstsca.exe
memory/232-157-0x000000000055E000-0x000000000058A000-memory.dmp
memory/232-159-0x00000000020B0000-0x00000000020FB000-memory.dmp
memory/792-183-0x0000000000400000-0x0000000000537000-memory.dmp
memory/792-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/792-147-0x0000000000400000-0x0000000000537000-memory.dmp
memory/792-149-0x0000000000400000-0x0000000000537000-memory.dmp
memory/952-133-0x0000000000400000-0x0000000000537000-memory.dmp
memory/952-136-0x0000000000400000-0x0000000000537000-memory.dmp
memory/952-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/952-142-0x0000000000400000-0x0000000000537000-memory.dmp
memory/952-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1744-145-0x0000000000793000-0x0000000000825000-memory.dmp
memory/3776-137-0x00000000023F0000-0x000000000250B000-memory.dmp
memory/3776-135-0x0000000002284000-0x0000000002316000-memory.dmp
memory/4772-154-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4772-165-0x0000000061E00000-0x0000000061EF3000-memory.dmp
memory/4772-186-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4772-160-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4772-158-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4772-156-0x0000000000400000-0x000000000045F000-memory.dmp
memory/4772-191-0x0000000000400000-0x000000000045F000-memory.dmp