Edit tour
Windows
Analysis Report
n41dQbiw1Y.exe
Overview
General Information
Sample name: | n41dQbiw1Y.exe (renamed file extension from none to exe, renamed because original name is a hash value) |
Original sample name: | 635a73433a258fa5a9b3b015f57ca84e1c296e9b65888fb64ebb602213a9d49d |
Analysis ID: | 1587010 |
MD5: | 0511a0c819ade47392a2f3a51eaf1f0b |
SHA1: | 39b0471e8d501702179bfcb744728c00dcced7ba |
SHA256: | 635a73433a258fa5a9b3b015f57ca84e1c296e9b65888fb64ebb602213a9d49d |
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
Antivirus detection for dropped file
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 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
Creates HTML files with .exe extension (expired dropper behavior)
Found stalling execution ending in API Sleep call
Injects a PE file into a foreign processes
Machine Learning detection for dropped file
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 check the parent process ID (often done to detect debuggers and analysis systems)
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 non-DNS traffic on DNS port
Detected potential crypto function
Dropped file seen in connection with other malware
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 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)
Sample file is different than original file name gathered from version info
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
- n41dQbiw1Y.exe (PID: 7272 cmdline:
"C:\Users\ user\Deskt op\n41dQbi w1Y.exe" MD5: 0511A0C819ADE47392A2F3A51EAF1F0B) - n41dQbiw1Y.exe (PID: 7288 cmdline:
"C:\Users\ user\Deskt op\n41dQbi w1Y.exe" MD5: 0511A0C819ADE47392A2F3A51EAF1F0B) - icacls.exe (PID: 7352 cmdline:
icacls "C: \Users\use r\AppData\ Local\40d9 a5c5-1720- 48cf-8d23- cf020cc38b 03" /deny *S-1-1-0:( OI)(CI)(DE ,DC) MD5: 2E49585E4E08565F52090B144062F97E) - n41dQbiw1Y.exe (PID: 7376 cmdline:
"C:\Users\ user\Deskt op\n41dQbi w1Y.exe" - -Admin IsN otAutoStar t IsNotTas k MD5: 0511A0C819ADE47392A2F3A51EAF1F0B) - n41dQbiw1Y.exe (PID: 7416 cmdline:
"C:\Users\ user\Deskt op\n41dQbi w1Y.exe" - -Admin IsN otAutoStar t IsNotTas k MD5: 0511A0C819ADE47392A2F3A51EAF1F0B)
- n41dQbiw1Y.exe (PID: 7460 cmdline:
C:\Users\u ser\AppDat a\Local\40 d9a5c5-172 0-48cf-8d2 3-cf020cc3 8b03\n41dQ biw1Y.exe --Task MD5: 0511A0C819ADE47392A2F3A51EAF1F0B) - n41dQbiw1Y.exe (PID: 7476 cmdline:
C:\Users\u ser\AppDat a\Local\40 d9a5c5-172 0-48cf-8d2 3-cf020cc3 8b03\n41dQ biw1Y.exe --Task MD5: 0511A0C819ADE47392A2F3A51EAF1F0B)
- n41dQbiw1Y.exe (PID: 7644 cmdline:
"C:\Users\ user\AppDa ta\Local\4 0d9a5c5-17 20-48cf-8d 23-cf020cc 38b03\n41d Qbiw1Y.exe " --AutoSt art MD5: 0511A0C819ADE47392A2F3A51EAF1F0B) - n41dQbiw1Y.exe (PID: 7664 cmdline:
"C:\Users\ user\AppDa ta\Local\4 0d9a5c5-17 20-48cf-8d 23-cf020cc 38b03\n41d Qbiw1Y.exe " --AutoSt art MD5: 0511A0C819ADE47392A2F3A51EAF1F0B)
- n41dQbiw1Y.exe (PID: 7864 cmdline:
"C:\Users\ user\AppDa ta\Local\4 0d9a5c5-17 20-48cf-8d 23-cf020cc 38b03\n41d Qbiw1Y.exe " --AutoSt art MD5: 0511A0C819ADE47392A2F3A51EAF1F0B) - n41dQbiw1Y.exe (PID: 7880 cmdline:
"C:\Users\ user\AppDa ta\Local\4 0d9a5c5-17 20-48cf-8d 23-cf020cc 38b03\n41d Qbiw1Y.exe " --AutoSt art MD5: 0511A0C819ADE47392A2F3A51EAF1F0B)
- 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-e5pgPH03fe\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 $490.\r\nPlease note that you'll never restore your data without payment.\r\nCheck your e-mail \"Spam\" or \"Junk\" folder if you don't get answer more than 6 hours.\r\n\r\n\r\nTo get this software you need write on our e-mail:\r\nsupport@freshmail.top\r\n\r\nReserve e-mail address to contact us:\r\ndatarestorehelp@airmail.cc\r\n\r\nYour personal ID:\r\n0793", "Ignore Files": ["ntuser.dat", "ntuser.dat.LOG1", "ntuser.dat.LOG2", "ntuser.pol", ".sys", ".ini", ".DLL", ".dll", ".blf", ".bat", ".lnk", ".regtrans-ms", "C:\\SystemID\\", "C:\\Users\\Default User\\", "C:\\Users\\Public\\", "C:\\Users\\All Users\\", "C:\\Users\\Default\\", "C:\\Documents and Settings\\", "C:\\ProgramData\\", "C:\\Recovery\\", "C:\\System Volume Information\\", "C:\\Users\\%username%\\AppData\\Roaming\\", "C:\\Users\\%username%\\AppData\\Local\\", "C:\\Windows\\", "C:\\PerfLogs\\", "C:\\ProgramData\\Microsoft\\", "C:\\ProgramData\\Package Cache\\", "C:\\Users\\Public\\", "C:\\$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-----\\\\nMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEArBrneEIQdBFXZaeBUAS8\\\\nwH7aMn3xZ2P0+v6VCnLGeU0C+9nPdY0vEKTGhmQmX5mTPxHx0YOio0MNfJigIngF\\\\nUurP7GwIzjiA9Vhh+E4oU4l3QncQbThKRZ3+N6k71ySVwL+15TJ00FBKk\\/z41dQu\\\\nQZqSgIS0T\\/7wW4CWCTLD3dewnt9CTD6UUN9A5dXBa3pxJf6gQeGgcF9MGkbaYsFn\\\\nucGyW1ppYe\\/4pPXENEo7OYgQDnJgch+X4BgMzRga6ix18adWGZj41gMHdRpFkjHE\\\\nsNZtuU5QQIgVkfWjmhv3PWTRQ5raftzMIvvycBmhiPeFwoDt8w3u1DFrAi65hWiD\\\\nWQIDAQAB\\\\n-----END PUBLIC KEY-----"}
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 |
| |
MALWARE_Win_STOP | Detects STOP ransomware | ditekSHen |
| |
Click to see the 48 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 |
---|---|---|---|---|---|---|---|---|
2025-01-09T21:16:34.826258+0100 | 2020826 | 1 | A Network Trojan was detected | 192.168.2.4 | 49734 | 188.40.141.211 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-01-09T21:16:33.529463+0100 | 2036334 | 1 | A Network Trojan was detected | 192.168.2.4 | 49734 | 188.40.141.211 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-01-09T21:16:34.826258+0100 | 2036333 | 1 | A Network Trojan was detected | 192.168.2.4 | 49734 | 188.40.141.211 | 80 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-01-09T21:16:30.074353+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49730 | 104.21.80.1 | 443 | TCP |
2025-01-09T21:16:32.534555+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49731 | 104.21.80.1 | 443 | TCP |
2025-01-09T21:16:33.332586+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49732 | 104.21.80.1 | 443 | TCP |
2025-01-09T21:16:33.529463+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49734 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:34.025211+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49735 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:34.826258+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49734 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:38.821038+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49734 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:39.579817+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49735 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:44.109849+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49734 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:44.561780+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49736 | 104.21.80.1 | 443 | TCP |
2025-01-09T21:16:44.931482+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49735 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:49.327194+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49734 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:50.231002+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 49735 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:52.809208+0100 | 2803274 | 2 | Potentially Bad Traffic | 192.168.2.4 | 57797 | 104.21.80.1 | 443 | TCP |
Timestamp | SID | Severity | Classtype | Source IP | Source Port | Destination IP | Destination Port | Protocol |
---|---|---|---|---|---|---|---|---|
2025-01-09T21:16:34.025211+0100 | 2833438 | 1 | Malware Command and Control Activity Detected | 192.168.2.4 | 49735 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:39.579817+0100 | 2833438 | 1 | Malware Command and Control Activity Detected | 192.168.2.4 | 49735 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:44.931482+0100 | 2833438 | 1 | Malware Command and Control Activity Detected | 192.168.2.4 | 49735 | 188.40.141.211 | 80 | TCP |
2025-01-09T21:16:50.231002+0100 | 2833438 | 1 | Malware Command and Control Activity Detected | 192.168.2.4 | 49735 | 188.40.141.211 | 80 | TCP |
Click to jump to signature section
Show All Signature Results
AV Detection |
---|
Source: | Avira: |
Source: | Avira URL Cloud: | ||
Source: | Avira URL Cloud: |
Source: | Avira: |
Source: | Malware Configuration Extractor: |