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Windows
Analysis Report
baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe
Overview
General Information
| Sample name: | baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe |
| Analysis ID: | 1381448 |
| MD5: | 5cacd6f1b5cec25f3f0b0b3c4d5807d3 |
| SHA1: | 41b8851bc57462502b0113ee1f2579dff5d94f4f |
| SHA256: | c73cb93ad9ad6d003b505ce2b960d75467ad612786e0559c74dca18426fb9400 |
| Tags: | exe |
| Infos: |  |
 | |
Detection
Babuk, Djvu
| Score: | 100 |
| Range: | 0 - 100 |
| Whitelisted: | false |
| Confidence: | 100% |
Signatures
Antivirus / Scanner detection for submitted sample
Antivirus detection for URL or domain
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
Snort IDS alert for network traffic
Yara detected Babuk Ransomware
Yara detected Djvu Ransomware
C2 URLs / IPs found in malware configuration
Found stalling execution ending in API Sleep call
Machine Learning detection for sample
Modifies existing user documents (likely ransomware behavior)
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 check if a debugger is running (IsDebuggerPresent)
Contains functionality to check if a debugger is running (OutputDebugString,GetLastError)
Contains functionality to check the parent process ID (often done to detect debuggers and analysis systems)
Contains functionality to dynamically determine API calls
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 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
Drops certificate files (DER)
Extensive use of GetProcAddress (often used to hide API calls)
Found dropped PE file which has not been started or loaded
Found evaded block containing many API calls
Found evasive API chain (may stop execution after checking a module file name)
Found large amount of non-executed APIs
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)
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
baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe (PID: 7020 cmdline: C:\Users\u ser\Deskto p\baaf76a5 d567125252 c32a834369 f3658341d8 224c4a0582 75c6760c43 d7545b_pay load.exe MD5: 5CACD6F1B5CEC25F3F0B0B3C4D5807D3) - icacls.exe (PID: 2992 cmdline:
icacls "C: \Users\use r\AppData\ Local\f9db 0e4d-9b2a- 4f3a-8741- 2b0aa0def8 a9" /deny *S-1-1-0:( OI)(CI)(DE ,DC) MD5: 2E49585E4E08565F52090B144062F97E) - baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe (PID: 6376 cmdline:
"C:\Users\ user\Deskt op\baaf76a 5d56712525 2c32a83436 9f3658341d 8224c4a058 275c6760c4 3d7545b_pa yload.exe" --Admin I sNotAutoSt art IsNotT ask MD5: 5CACD6F1B5CEC25F3F0B0B3C4D5807D3)
- baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe (PID: 7148 cmdline:
C:\Users\u ser\AppDat a\Local\f9 db0e4d-9b2 a-4f3a-874 1-2b0aa0de f8a9\baaf7 6a5d567125 252c32a834 369f365834 1d8224c4a0 58275c6760 c43d7545b_ payload.ex e --Task MD5: 5CACD6F1B5CEC25F3F0B0B3C4D5807D3)
- baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe (PID: 6252 cmdline:
"C:\Users\ user\AppDa ta\Local\f 9db0e4d-9b 2a-4f3a-87 41-2b0aa0d ef8a9\baaf 76a5d56712 5252c32a83 4369f36583 41d8224c4a 058275c676 0c43d7545b _payload.e xe" --Auto Start MD5: 5CACD6F1B5CEC25F3F0B0B3C4D5807D3)
- baaf76a5d567125252c32a834369f3658341d8224c4a058275c6760c43d7545b_payload.exe (PID: 6684 cmdline:
"C:\Users\ user\AppDa ta\Local\f 9db0e4d-9b 2a-4f3a-87 41-2b0aa0d ef8a9\baaf 76a5d56712 5252c32a83 4369f36583 41d8224c4a 058275c676 0c43d7545b _payload.e xe" --Auto Start MD5: 5CACD6F1B5CEC25F3F0B0B3C4D5807D3)
- 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": ["http://colisumy.com/dl/build2.exe", "http://zexeq.com/files/1/build3.exe"], "C2 url": "http://zexeq.com/raud/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\nYou can get and look video overview decrypt tool:\r\nhttps://we.tl/t-tnzomMj6HU\r\nPrice of private key and decrypt software is $980.\r\nDiscount 50% available if you contact us first 72 hours, that's price for you is $490.\r\nPlease note that you'll never restore your data without payment.\r\nCheck your e-mail \"Spam\" or \"Junk\" folder if you don't get answer more than 6 hours.\r\n\r\n\r\nTo get this software you need write on our e-mail:\r\nsupport@freshmail.top\r\n\r\nReserve e-mail address to contact us:\r\ndatarestorehelp@airmail.cc\r\n\r\nYour personal ID:\r\n0717JOsie", "Ignore Files": ["ntuser.dat", "ntuser.dat.LOG1", "ntuser.dat.LOG2", "ntuser.pol", ".sys", ".ini", ".DLL", ".dll", ".blf", ".bat", ".lnk", ".regtrans-ms", "C:\\SystemID\\", "C:\\Users\\Default User\\", "C:\\Users\\Public\\", "C:\\Users\\All Users\\", "C:\\Users\\Default\\", "C:\\Documents and Settings\\", "C:\\ProgramData\\", "C:\\Recovery\\", "C:\\System Volume Information\\", "C:\\Users\\%username%\\AppData\\Roaming\\", "C:\\Users\\%username%\\AppData\\Local\\", "C:\\Windows\\", "C:\\PerfLogs\\", "C:\\ProgramData\\Microsoft\\", "C:\\ProgramData\\Package Cache\\", "C:\\Users\\Public\\", "C:\\$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-----\\\\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA50iTgpK4WqHRCxsCP+Ko\\\\ni6Rfb9WWM4K\\/vgKVvZi\\/+pA7wR6QvFBURdJ1Z9mdw8kYkafMfVuTEgbW+j4RDepy\\\\nRMc6ZcYdxsu2f4+XgrCWmwJw8wVmodWyLZqqeb1k4FONQs+uAP0AxLLTUbcAfP75\\\\ngGAW9KhqPhoYKVhzDqtFOqCvYqMylrgCNwHpTp75Bv5up3OfAE5h6+t\\/TfjQjDFJ\\\\nJY0Tgum721KiGGppZfsBDqY1Zv\\/F45h+MVk9mhfvBd3UZNJUZI5ewP1zbnOU1llz\\\\ndETA6WbQWWm4u4pamw3U0ZLnFDJQkUgOAbxOfVM4xpi0lrPyV+oTCXnpOgcF4YvU\\\\n2wIDAQAB\\\\n-----END PUBLIC KEY-----"}| 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 |
|
| 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 |
|
| Source | Rule | Description | Author | Strings |
|---|---|---|---|---|
| JoeSecurity_Djvu | Yara detected Djvu Ransomware | Joe Security | ||
| Windows_Ransomware_Stop_1e8d48ff | 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 39 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 25 entries | ||||
⊘No Sigma rule has matched
| Timestamp: | 192.168.2.4199.59.242.15049734802833438 01/26/24-01:36:17.138983 |
| SID: | 2833438 |
| Source Port: | 49734 |
| Destination Port: | 80 |
| Protocol: | TCP |
| Classtype: | A Network Trojan was detected |
| Timestamp: | 192.168.2.4199.59.242.15049732802020826 01/26/24-01:36:00.285049 |
| SID: | 2020826 |
| Source Port: | 49732 |
| Destination Port: | 80 |
| Protocol: | TCP |
| Classtype: | A Network Trojan was detected |
| Timestamp: | 192.168.2.4199.59.242.15049732802036333 01/26/24-01:36:00.285049 |
| SID: | 2036333 |
| Source Port: | 49732 |
| Destination Port: | 80 |
| Protocol: | TCP |
| Classtype: | A Network Trojan was detected |
Click to jump to signature section
Show All Signature Results
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