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Windows
Analysis Report
buildz.exe
Overview
General Information
Detection
Babuk, Djvu
Score: | 100 |
Range: | 0 - 100 |
Whitelisted: | false |
Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Detected unpacking (changes PE section rights)
Detected unpacking (overwrites its own PE header)
Found malware configuration
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for domain / URL
Multi AV Scanner detection for dropped file
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected Babuk Ransomware
Yara detected Djvu Ransomware
AI detected suspicious sample
C2 URLs / IPs found in malware configuration
Contains functionality to inject code into remote processes
Infects executable files (exe, dll, sys, html)
Injects a PE file into a foreign processes
Machine Learning detection for sample
Modifies existing user documents (likely ransomware behavior)
Tries to harvest and steal browser information (history, passwords, etc)
Writes a notice file (html or txt) to demand a ransom
Writes many files with high entropy
Contains functionality for execution timing, often used to detect debuggers
Contains functionality to call native functions
Contains functionality to check if a debugger is running (IsDebuggerPresent)
Contains functionality to check if a debugger is running (OutputDebugString,GetLastError)
Contains functionality to dynamically determine API calls
Contains functionality to launch a program with higher privileges
Contains functionality to query CPU information (cpuid)
Contains functionality to query locales information (e.g. system language)
Contains functionality to query network adapater information
Contains functionality to read the PEB
Contains functionality to record screenshots
Contains functionality which may be used to detect a debugger (GetProcessHeap)
Contains long sleeps (>= 3 min)
Creates a process in suspended mode (likely to inject code)
Detected potential crypto function
Drops PE files
Extensive use of GetProcAddress (often used to hide API calls)
Found evasive API chain (may stop execution after checking a module file name)
Found potential string decryption / allocating functions
IP address seen in connection with other malware
Internet Provider seen in connection with other malware
JA3 SSL client fingerprint seen in connection with other malware
May sleep (evasive loops) to hinder dynamic analysis
Monitors certain registry keys / values for changes (often done to protect autostart functionality)
PE file contains sections with non-standard names
Sigma detected: CurrentVersion Autorun Keys Modification
Suricata IDS alerts with low severity for network traffic
Uses 32bit PE files
Uses Microsoft's Enhanced Cryptographic Provider
Uses cacls to modify the permissions of files
Uses code obfuscation techniques (call, push, ret)
Yara signature match
Classification
- System is w10x64
- buildz.exe (PID: 5576 cmdline:
"C:\Users\ user\Deskt op\buildz. exe" MD5: B7CB7F2B5CD9BD047710650295DC88F7) - buildz.exe (PID: 5272 cmdline:
"C:\Users\ user\Deskt op\buildz. exe" MD5: B7CB7F2B5CD9BD047710650295DC88F7) - icacls.exe (PID: 6460 cmdline:
icacls "C: \Users\use r\AppData\ Local\c53b c5ed-81b6- 49df-8a73- 9bf24188ea 08" /deny *S-1-1-0:( OI)(CI)(DE ,DC) MD5: 2E49585E4E08565F52090B144062F97E) - buildz.exe (PID: 5240 cmdline:
"C:\Users\ user\Deskt op\buildz. exe" --Adm in IsNotAu toStart Is NotTask MD5: B7CB7F2B5CD9BD047710650295DC88F7) - buildz.exe (PID: 432 cmdline:
"C:\Users\ user\Deskt op\buildz. exe" --Adm in IsNotAu toStart Is NotTask MD5: B7CB7F2B5CD9BD047710650295DC88F7)
- buildz.exe (PID: 7120 cmdline:
C:\Users\u ser\AppDat a\Local\c5 3bc5ed-81b 6-49df-8a7 3-9bf24188 ea08\build z.exe --Ta sk MD5: B7CB7F2B5CD9BD047710650295DC88F7) - buildz.exe (PID: 4708 cmdline:
C:\Users\u ser\AppDat a\Local\c5 3bc5ed-81b 6-49df-8a7 3-9bf24188 ea08\build z.exe --Ta sk MD5: B7CB7F2B5CD9BD047710650295DC88F7)
- buildz.exe (PID: 940 cmdline:
"C:\Users\ user\AppDa ta\Local\c 53bc5ed-81 b6-49df-8a 73-9bf2418 8ea08\buil dz.exe" -- AutoStart MD5: B7CB7F2B5CD9BD047710650295DC88F7) - buildz.exe (PID: 6848 cmdline:
"C:\Users\ user\AppDa ta\Local\c 53bc5ed-81 b6-49df-8a 73-9bf2418 8ea08\buil dz.exe" -- AutoStart MD5: B7CB7F2B5CD9BD047710650295DC88F7)
- buildz.exe (PID: 5700 cmdline:
"C:\Users\ user\AppDa ta\Local\c 53bc5ed-81 b6-49df-8a 73-9bf2418 8ea08\buil dz.exe" -- AutoStart MD5: B7CB7F2B5CD9BD047710650295DC88F7) - buildz.exe (PID: 2148 cmdline:
"C:\Users\ user\AppDa ta\Local\c 53bc5ed-81 b6-49df-8a 73-9bf2418 8ea08\buil dz.exe" -- AutoStart MD5: B7CB7F2B5CD9BD047710650295DC88F7)
- cleanup
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
Babuk | Babuk Ransomware is a sophisticated ransomware compiled for several platforms. Windows and ARM for Linux are the most used compiled versions, but ESX and a 32bit old PE executable were observed over time. as well It uses an Elliptic Curve Algorithm (Montgomery Algorithm) to build the encryption keys. | No Attribution |
Name | Description | Attribution | Blogpost URLs | Link |
---|---|---|---|---|
STOP, Djvu | STOP Djvu Ransomware it is a ransomware which encrypts user data through AES-256 and adds one of the dozen available extensions as marker to the encrypted file's name. It is not used to encrypt the entire file but only the first 5 MB. In its original version it was able to run offline and, in that case, it used a hard-coded key which could be extracted to decrypt files. | No Attribution |
{"Download URLs": [""], "C2 url": "http://cajgtus.com/lancer/get.php", "Ransom note file": "_readme.txt", "Ransom note": "ATTENTION!\r\n\r\nDon't worry, you can return all your files!\r\nAll your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key.\r\nThe only method of recovering files is to purchase decrypt tool and unique key for you.\r\nThis software will decrypt all your encrypted files.\r\nWhat guarantees you have?\r\nYou can send one of your encrypted file from your PC and we decrypt it for free.\r\nBut we can decrypt only 1 file for free. File must not contain valuable information.\r\nDo not ask assistants from youtube and recovery data sites for help in recovering your data.\r\nThey can use your free decryption quota and scam you.\r\nOur contact is emails in this text document only.\r\nYou can get and look video overview decrypt tool.\r\nPrice of private key and decrypt software is $999.\r\nDiscount 50% available if you contact us first 72 hours, that's price for you is $499.\r\nPlease note that you'll never restore your data without payment.\r\nCheck your e-mail \"Spam\" or \"Junk\" folder if you don't get answer more than 6 hours.\r\n\r\n\r\nTo get this software you need write on our e-mail:\r\nsupport@freshingmail.top\r\n\r\nReserve e-mail address to contact us:\r\ndatarestorehelpyou@airmail.cc\r\n\r\nYour personal ID:\r\n0876qual", "Ignore Files": ["ntuser.dat", "ntuser.dat.LOG1", "ntuser.dat.LOG2", "ntuser.pol", ".sys", ".ini", ".DLL", ".dll", ".blf", ".bat", ".lnk", ".regtrans-ms", "C:\\SystemID\\", "C:\\Users\\Default User\\", "C:\\Users\\Public\\", "C:\\Users\\All Users\\", "C:\\Users\\Default\\", "C:\\Documents and Settings\\", "C:\\ProgramData\\", "C:\\Recovery\\", "C:\\System Volume Information\\", "C:\\Users\\%username%\\AppData\\Roaming\\", "C:\\Users\\%username%\\AppData\\Local\\", "C:\\Windows\\", "C:\\PerfLogs\\", "C:\\ProgramData\\Microsoft\\", "C:\\ProgramData\\Package Cache\\", "C:\\Users\\Public\\", "C:\\$Recycle.Bin\\", "C:\\$WINDOWS.~BT\\", "C:\\dell\\", "C:\\Intel\\", "C:\\MSOCache\\", "C:\\Program Files\\", "C:\\Program Files (x86)\\", "C:\\Games\\", "C:\\Windows.old\\", "D:\\Users\\%username%\\AppData\\Roaming\\", "D:\\Users\\%username%\\AppData\\Local\\", "D:\\Windows\\", "D:\\PerfLogs\\", "D:\\ProgramData\\Desktop\\", "D:\\ProgramData\\Microsoft\\", "D:\\ProgramData\\Package Cache\\", "D:\\Users\\Public\\", "D:\\$Recycle.Bin\\", "D:\\$WINDOWS.~BT\\", "D:\\dell\\", "D:\\Intel\\", "D:\\MSOCache\\", "D:\\Program Files\\", "D:\\Program Files (x86)\\", "D:\\Games\\", "E:\\Users\\%username%\\AppData\\Roaming\\", "E:\\Users\\%username%\\AppData\\Local\\", "E:\\Windows\\", "E:\\PerfLogs\\", "E:\\ProgramData\\Desktop\\", "E:\\ProgramData\\Microsoft\\", "E:\\ProgramData\\Package Cache\\", "E:\\Users\\Public\\", "E:\\$Recycle.Bin\\", "E:\\$WINDOWS.~BT\\", "E:\\dell\\", "E:\\Intel\\", "E:\\MSOCache\\", "E:\\Program Files\\", "E:\\Program Files (x86)\\", "E:\\Games\\", "F:\\Users\\%username%\\AppData\\Roaming\\", "F:\\Users\\%username%\\AppData\\Local\\", "F:\\Windows\\", "F:\\PerfLogs\\", "F:\\ProgramData\\Desktop\\", "F:\\ProgramData\\Microsoft\\", "F:\\Users\\Public\\", "F:\\$Recycle.Bin\\", "F:\\$WINDOWS.~BT\\", "F:\\dell\\", "F:\\Intel\\"], "Public Key": "-----BEGIN PUBLIC KEY-----\\\\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA2iF2z8qTGWyGMtNhPR7G\\\\nMGAf\\/Cj6VowurSUOyORyuV6zmACc4fML4hGZe2+jMtlmPuDm9AKDe2A7ktEm+8AV\\\\nWTov1Vz9zeVkt6hy7KlP+fM+wTiEtwbYALKQV0RCYHyhH8z36Dco\\/dcL+M+OSwcd\\\\nJ9jJ5VBro0+QMbS+FRjk0GS4DwzprGjSwPLJWp4H1iZHhEcUplB4krFkwsyNfhb\\/\\\\naiJzA\\/4ZYz\\/+hPdv9YQxd3R+bgv2LdzV605176wsakPezqJxUSHxOEkkpYP4P149\\\\nXsXG76vTNjWPRW\\/M3+oKBtMvAXzMYuRR9q1peV++b1l6hgkiuqDicGvT9JPCUDld\\\\n4QIDAQAB\\\\n-----END PUBLIC KEY-----"}
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
Windows_Trojan_RedLineStealer_ed346e4c | unknown | unknown |
| |
Windows_Trojan_RedLineStealer_ed346e4c | unknown | unknown |
| |
JoeSecurity_Djvu | Yara detected Djvu Ransomware | Joe Security | ||
Windows_Ransomware_Stop_1e8d48ff | unknown | unknown |
| |
JoeSecurity_Djvu | Yara detected Djvu Ransomware | Joe Security | ||
Click to see the 47 entries |
Source | Rule | Description | Author | Strings |
---|---|---|---|---|
JoeSecurity_Djvu | Yara detected Djvu Ransomware | Joe Security | ||
Windows_Ransomware_Stop_1e8d48ff | unknown | unknown |
| |
MALWARE_Win_STOP | Detects STOP ransomware | ditekSHen |
| |
JoeSecurity_Djvu | Yara detected Djvu Ransomware | Joe Security | ||
Windows_Ransomware_Stop_1e8d48ff | unknown | unknown |
| |
Click to see the 55 entries |
System Summary |
---|
Source: | Author: Victor Sergeev, Daniil Yugoslavskiy, Gleb Sukhodolskiy, Timur Zinniatullin, oscd.community, Tim Shelton, frack113 (split): |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-05T16:26:17.000369+0200 | 2036335 | 1 | A Network Trojan was detected | 190.219.117.240 | 80 | 192.168.2.5 | 49711 | TCP |
2024-10-05T16:26:48.174876+0200 | 2036335 | 1 | A Network Trojan was detected | 190.219.117.240 | 80 | 192.168.2.5 | 49869 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-05T16:26:16.993980+0200 | 2036334 | 1 | A Network Trojan was detected | 192.168.2.5 | 49711 | 190.219.117.240 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-05T16:26:04.602511+0200 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.5 | 49704 | 188.114.97.3 | 443 | TCP |
2024-10-05T16:26:13.362152+0200 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.5 | 49705 | 188.114.97.3 | 443 | TCP |
2024-10-05T16:26:16.993980+0200 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.5 | 49711 | 190.219.117.240 | 80 | TCP |
2024-10-05T16:26:25.360105+0200 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.5 | 49751 | 188.114.97.3 | 443 | TCP |
2024-10-05T16:26:36.529275+0200 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.5 | 49797 | 188.114.97.3 | 443 | TCP |
2024-10-05T16:26:46.617721+0200 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.5 | 49858 | 188.114.97.3 | 443 | TCP |
2024-10-05T16:26:48.167152+0200 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.5 | 49869 | 190.219.117.240 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2024-10-05T16:26:48.167152+0200 | 2833438 | 1 | Malware Command and Control Activity Detected | 192.168.2.5 | 49869 | 190.219.117.240 | 80 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
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Source: | Avira: |
Source: | Malware Configuration Extractor: |