Analysis
- max time kernel
143s - max time network
149s - platform
windows10-2004_x64 - resource
win10v2004-20231215-en - resource tags
- submitted
17/01/2024, 20:02
General
- Target 637acf42e824116a795011ae9c156367.exe
- Size 789KB
- Sample240117-yr9cpsece7
- SHA256 a567774401aa9224395d693859beb4cd9a6bd62c00c513ee86b64651238622bc
Malware Config
Extracted
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djvu
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http://astdg.top/fhsgtsspen6/get.php
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extension
.hoop
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offline_id
922IaqlBU1I6IKX6eTDABuH3amHHwoa5qUSb8vt1
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payload_url
http://securebiz.org/dl/build2.exe
http://astdg.top/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-I6qIbIYiz9 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: 0326gDrgo
Signatures
- Detected Djvu ransomware 17 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).
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of WriteProcessMemory 26 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\637acf42e824116a795011ae9c156367.exe"C:\Users\Admin\AppData\Local\Temp\637acf42e824116a795011ae9c156367.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\637acf42e824116a795011ae9c156367.exe"C:\Users\Admin\AppData\Local\Temp\637acf42e824116a795011ae9c156367.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\c905c9cc-cc81-4ec1-9569-e595611c542b" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\637acf42e824116a795011ae9c156367.exe"C:\Users\Admin\AppData\Local\Temp\637acf42e824116a795011ae9c156367.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\637acf42e824116a795011ae9c156367.exe"C:\Users\Admin\AppData\Local\Temp\637acf42e824116a795011ae9c156367.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Suspicious behavior: EnumeratesProcesses
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
24BD96D5497F70B3F510A6B53CD43F3E_3A89246FB90C5EE6620004F1AE0EB0EA
CAF4703619713E3F18D8A9D5D88D6288_F2DAF19C1F776537105D08FC8D978464
637acf42e824116a795011ae9c156367.exe
memory/220-18-0x00000000025D0000-0x0000000002670000-memory.dmp
memory/1528-3-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1528-15-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1528-5-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1528-4-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1528-6-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-21-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-22-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-20-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-28-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-27-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-29-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-31-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-33-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-34-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-35-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4820-37-0x0000000000400000-0x0000000000537000-memory.dmp
memory/4880-1-0x0000000004200000-0x0000000004294000-memory.dmp
memory/4880-2-0x00000000042A0000-0x00000000043BB000-memory.dmp