Analysis
- max time kernel
100s - max time network
133s - platform
windows10-2004_x64 - resource
win10v2004-20220901-en - resource tags
- submitted
21/10/2022, 16:21
General
- Target D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe
- Size 728KB
- Sample221021-ttmt9sebh4
- SHA256 d6aa3330313aa65c88f3ede92b2da692cb0682a27003da5125952431d8c89e3b
Malware Config
Extracted
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djvu
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http://acacaca.org/test3/get.php
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extension
.mmvb
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offline_id
yd6oYv6aBN90yFzTWdZ34sXSXtXiauzOLXZyWht1
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payload_url
http://rgyui.top/dl/build2.exe
http://acacaca.org/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-xuPJqoyzQE 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: 0556Jhyjd
Extracted
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vidar
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55.1
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517
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https://t.me/tg_privatetalk
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https://nerdculture.de/@yixehi33
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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 2 IoCs
- Checks computer location settings 2 TTPs 3 IoCs
Looks up country code configured in the registry, likely geofence.
- Loads dropped DLL 3 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.
- Delays execution with timeout.exe 1 IoCs
- Suspicious behavior: EnumeratesProcesses 6 IoCs
- Suspicious use of WriteProcessMemory 43 IoCs
Processes
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C:\Users\Admin\AppData\Local\Temp\D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe"C:\Users\Admin\AppData\Local\Temp\D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe"1⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe"C:\Users\Admin\AppData\Local\Temp\D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.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\9acadfaf-b0aa-4239-b455-4b2615a0a501" /deny *S-1-1-0:(OI)(CI)(DE,DC)3⤵
- Modifies file permissions
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C:\Users\Admin\AppData\Local\Temp\D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe"C:\Users\Admin\AppData\Local\Temp\D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe" --Admin IsNotAutoStart IsNotTask3⤵
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe"C:\Users\Admin\AppData\Local\Temp\D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe" --Admin IsNotAutoStart IsNotTask4⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\3a09bb9a-703f-419d-bb6f-5e9c5262ac92\build2.exe"C:\Users\Admin\AppData\Local\3a09bb9a-703f-419d-bb6f-5e9c5262ac92\build2.exe"5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\3a09bb9a-703f-419d-bb6f-5e9c5262ac92\build2.exe"C:\Users\Admin\AppData\Local\3a09bb9a-703f-419d-bb6f-5e9c5262ac92\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\3a09bb9a-703f-419d-bb6f-5e9c5262ac92\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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Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
mozglue.dll
nss3.dll
sqlite3.dll
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
07CEF2F654E3ED6050FFC9B6EB844250_3431D4C539FB2CFCB781821E9902850D
B2FAF7692FD9FFBD64EDE317E42334BA_D7393C8F62BDE4D4CB606228BC7A711E
build2.exe
build2.exe
build2.exe
D6AA3330313AA65C88F3EDE92B2DA692CB0682A27003D.exe
memory/1560-165-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1560-146-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1560-148-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1560-153-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1816-147-0x0000000004707000-0x0000000004799000-memory.dmp
memory/1840-143-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1840-139-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1840-138-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1840-134-0x0000000000400000-0x0000000000537000-memory.dmp
memory/1840-135-0x0000000000400000-0x0000000000537000-memory.dmp
memory/3292-161-0x0000000000400000-0x0000000000458000-memory.dmp
memory/3292-160-0x0000000000400000-0x0000000000458000-memory.dmp
memory/3292-164-0x0000000000400000-0x0000000000458000-memory.dmp
memory/3292-166-0x0000000000400000-0x0000000000458000-memory.dmp
memory/3292-158-0x0000000000400000-0x0000000000458000-memory.dmp
memory/3292-171-0x0000000000400000-0x0000000000458000-memory.dmp
memory/4256-132-0x000000000487C000-0x000000000490E000-memory.dmp
memory/4256-137-0x0000000004910000-0x0000000004A2B000-memory.dmp
memory/4256-136-0x000000000487C000-0x000000000490E000-memory.dmp
memory/4824-163-0x00000000007F0000-0x0000000000834000-memory.dmp
memory/4824-162-0x0000000000882000-0x00000000008AA000-memory.dmp